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SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0225 AM CDT Sun Aug 03 2025 Valid 051200Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL AND NORTHERN PLAINS... ...SUMMARY... Thunderstorms associated with a threat for isolated severe gusts and hail will be possible across parts of the central and northern Plains on Tuesday. ...Central and Northern Plains... At mid-levels, a ridge is forecast to remain over the central Rockies on Tuesday, as a shortwave trough moves through the northern High Plains. At the surface, a moist airmass will be in place across much of the north-central U.S., where dewpoints are forecast to be mostly in the 60s F. Along the western edge of this moist airmass, an axis of moderate instability is forecast to develop by afternoon from western Kansas northward into the western Dakotas. Scattered thunderstorm are expected to form ahead of the trough across the northern Plains, with more isolated development occurring southward into the central High Plains. NAM forecast soundings by late afternoon near the instability axis from western Nebraska into western South Dakota have 0-6 km shear in the 30 to 35 knot range, with 700-500 mb lapse rates near 8.5 C/km. In addition, surface temperature-dewpoint spreads are forecast to be near 30 degrees F. This thermodynamic environment will likely result in high-based cells with potential for severe gusts. Hail will also be possible, mainly with cells that form near areas with the strongest instability. ..Broyles.. 08/03/2025 Read more

SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0225 AM CDT Sun Aug 03 2025 Valid 051200Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL AND NORTHERN PLAINS... ...SUMMARY... Thunderstorms associated with a threat for isolated severe gusts and hail will be possible across parts of the central and northern Plains on Tuesday. ...Central and Northern Plains... At mid-levels, a ridge is forecast to remain over the central Rockies on Tuesday, as a shortwave trough moves through the northern High Plains. At the surface, a moist airmass will be in place across much of the north-central U.S., where dewpoints are forecast to be mostly in the 60s F. Along the western edge of this moist airmass, an axis of moderate instability is forecast to develop by afternoon from western Kansas northward into the western Dakotas. Scattered thunderstorm are expected to form ahead of the trough across the northern Plains, with more isolated development occurring southward into the central High Plains. NAM forecast soundings by late afternoon near the instability axis from western Nebraska into western South Dakota have 0-6 km shear in the 30 to 35 knot range, with 700-500 mb lapse rates near 8.5 C/km. In addition, surface temperature-dewpoint spreads are forecast to be near 30 degrees F. This thermodynamic environment will likely result in high-based cells with potential for severe gusts. Hail will also be possible, mainly with cells that form near areas with the strongest instability. ..Broyles.. 08/03/2025 Read more

SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0225 AM CDT Sun Aug 03 2025 Valid 051200Z - 061200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE CENTRAL AND NORTHERN PLAINS... ...SUMMARY... Thunderstorms associated with a threat for isolated severe gusts and hail will be possible across parts of the central and northern Plains on Tuesday. ...Central and Northern Plains... At mid-levels, a ridge is forecast to remain over the central Rockies on Tuesday, as a shortwave trough moves through the northern High Plains. At the surface, a moist airmass will be in place across much of the north-central U.S., where dewpoints are forecast to be mostly in the 60s F. Along the western edge of this moist airmass, an axis of moderate instability is forecast to develop by afternoon from western Kansas northward into the western Dakotas. Scattered thunderstorm are expected to form ahead of the trough across the northern Plains, with more isolated development occurring southward into the central High Plains. NAM forecast soundings by late afternoon near the instability axis from western Nebraska into western South Dakota have 0-6 km shear in the 30 to 35 knot range, with 700-500 mb lapse rates near 8.5 C/km. In addition, surface temperature-dewpoint spreads are forecast to be near 30 degrees F. This thermodynamic environment will likely result in high-based cells with potential for severe gusts. Hail will also be possible, mainly with cells that form near areas with the strongest instability. ..Broyles.. 08/03/2025 Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0204 AM CDT Sun Aug 03 2025 Valid 041200Z - 051200Z ...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN/CENTRAL UTAH INTO FAR NORTHERN ARIZONA... ...Synopsis... A compact midlevel shortwave trough will advance east-northeastward across the Intermountain West and northern Rockies on Monday. Between the shortwave trough and a midlevel anticyclone over the Southwest, moderate (30-40 kt) midlevel west-southwesterly flow will overspread the Great Basin. ...Great Basin... Diurnal heating amid a warm/dry antecedent air mass will yield a deeply mixed boundary layer across the Great Basin -- characterized by widespread single-digit RH. Over southern/central UT, deep mixing into the enhanced flow aloft will contribute to 20 mph sustained west-southwesterly surface winds. These winds and low RH will lead to critical fire-weather conditions, given receptive fuels. ...Dry Thunderstorms - Intermountain West... Forcing for ascent preceding the midlevel trough will aid in high-based thunderstorm development across the Intermountain West and northern Rockies during the afternoon. Around 0.7 inch PW (inverted-V sounding) and modest storm motions will favor mostly dry thunderstorms across southeastern OR and southwestern ID. Given limited precipitation and receptive fuels, lightning-induced ignitions will be possible (along with strong outflow winds). ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0201 AM CDT Sun Aug 03 2025 Valid 031200Z - 041200Z ...Synopsis... A midlevel trough will move eastward from the eastern Pacific into the Northwest through the period. Within the base of the trough, enhanced midlevel westerly flow will overspread a dry/deeply mixed boundary layer across the Great Basin during the afternoon. This will favor breezy/gusty surface winds (around 15-20 mph) amid single-digit to lower teens RH, and given receptive fuels, elevated fire-weather conditions are expected. Preceding the trough, forcing for ascent will aid in afternoon thunderstorm development across the northern Great Basin and Intermountain West. Across parts of northern CA, southeastern OR, and southwestern ID, inverted-V soundings (around 0.5-0.7 inch PW) and quick storm motions will lead to mostly dry thunderstorms. These storms will pose a risk of lightning-induced ignitions and strong-severe outflow winds. For details on the severe-storm risk, see the SPC Day 1 Convective Outlook. A mix of wet/dry thunderstorms (with higher storms coverage) are also expected farther north across east-central OR, though these storms should be accompanied by measurable rainfall. Lightning-induced ignitions will still be possible along the peripheries of rain cores. ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0201 AM CDT Sun Aug 03 2025 Valid 031200Z - 041200Z ...Synopsis... A midlevel trough will move eastward from the eastern Pacific into the Northwest through the period. Within the base of the trough, enhanced midlevel westerly flow will overspread a dry/deeply mixed boundary layer across the Great Basin during the afternoon. This will favor breezy/gusty surface winds (around 15-20 mph) amid single-digit to lower teens RH, and given receptive fuels, elevated fire-weather conditions are expected. Preceding the trough, forcing for ascent will aid in afternoon thunderstorm development across the northern Great Basin and Intermountain West. Across parts of northern CA, southeastern OR, and southwestern ID, inverted-V soundings (around 0.5-0.7 inch PW) and quick storm motions will lead to mostly dry thunderstorms. These storms will pose a risk of lightning-induced ignitions and strong-severe outflow winds. For details on the severe-storm risk, see the SPC Day 1 Convective Outlook. A mix of wet/dry thunderstorms (with higher storms coverage) are also expected farther north across east-central OR, though these storms should be accompanied by measurable rainfall. Lightning-induced ignitions will still be possible along the peripheries of rain cores. ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0201 AM CDT Sun Aug 03 2025 Valid 031200Z - 041200Z ...Synopsis... A midlevel trough will move eastward from the eastern Pacific into the Northwest through the period. Within the base of the trough, enhanced midlevel westerly flow will overspread a dry/deeply mixed boundary layer across the Great Basin during the afternoon. This will favor breezy/gusty surface winds (around 15-20 mph) amid single-digit to lower teens RH, and given receptive fuels, elevated fire-weather conditions are expected. Preceding the trough, forcing for ascent will aid in afternoon thunderstorm development across the northern Great Basin and Intermountain West. Across parts of northern CA, southeastern OR, and southwestern ID, inverted-V soundings (around 0.5-0.7 inch PW) and quick storm motions will lead to mostly dry thunderstorms. These storms will pose a risk of lightning-induced ignitions and strong-severe outflow winds. For details on the severe-storm risk, see the SPC Day 1 Convective Outlook. A mix of wet/dry thunderstorms (with higher storms coverage) are also expected farther north across east-central OR, though these storms should be accompanied by measurable rainfall. Lightning-induced ignitions will still be possible along the peripheries of rain cores. ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0201 AM CDT Sun Aug 03 2025 Valid 031200Z - 041200Z ...Synopsis... A midlevel trough will move eastward from the eastern Pacific into the Northwest through the period. Within the base of the trough, enhanced midlevel westerly flow will overspread a dry/deeply mixed boundary layer across the Great Basin during the afternoon. This will favor breezy/gusty surface winds (around 15-20 mph) amid single-digit to lower teens RH, and given receptive fuels, elevated fire-weather conditions are expected. Preceding the trough, forcing for ascent will aid in afternoon thunderstorm development across the northern Great Basin and Intermountain West. Across parts of northern CA, southeastern OR, and southwestern ID, inverted-V soundings (around 0.5-0.7 inch PW) and quick storm motions will lead to mostly dry thunderstorms. These storms will pose a risk of lightning-induced ignitions and strong-severe outflow winds. For details on the severe-storm risk, see the SPC Day 1 Convective Outlook. A mix of wet/dry thunderstorms (with higher storms coverage) are also expected farther north across east-central OR, though these storms should be accompanied by measurable rainfall. Lightning-induced ignitions will still be possible along the peripheries of rain cores. ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0201 AM CDT Sun Aug 03 2025 Valid 031200Z - 041200Z ...Synopsis... A midlevel trough will move eastward from the eastern Pacific into the Northwest through the period. Within the base of the trough, enhanced midlevel westerly flow will overspread a dry/deeply mixed boundary layer across the Great Basin during the afternoon. This will favor breezy/gusty surface winds (around 15-20 mph) amid single-digit to lower teens RH, and given receptive fuels, elevated fire-weather conditions are expected. Preceding the trough, forcing for ascent will aid in afternoon thunderstorm development across the northern Great Basin and Intermountain West. Across parts of northern CA, southeastern OR, and southwestern ID, inverted-V soundings (around 0.5-0.7 inch PW) and quick storm motions will lead to mostly dry thunderstorms. These storms will pose a risk of lightning-induced ignitions and strong-severe outflow winds. For details on the severe-storm risk, see the SPC Day 1 Convective Outlook. A mix of wet/dry thunderstorms (with higher storms coverage) are also expected farther north across east-central OR, though these storms should be accompanied by measurable rainfall. Lightning-induced ignitions will still be possible along the peripheries of rain cores. ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0201 AM CDT Sun Aug 03 2025 Valid 031200Z - 041200Z ...Synopsis... A midlevel trough will move eastward from the eastern Pacific into the Northwest through the period. Within the base of the trough, enhanced midlevel westerly flow will overspread a dry/deeply mixed boundary layer across the Great Basin during the afternoon. This will favor breezy/gusty surface winds (around 15-20 mph) amid single-digit to lower teens RH, and given receptive fuels, elevated fire-weather conditions are expected. Preceding the trough, forcing for ascent will aid in afternoon thunderstorm development across the northern Great Basin and Intermountain West. Across parts of northern CA, southeastern OR, and southwestern ID, inverted-V soundings (around 0.5-0.7 inch PW) and quick storm motions will lead to mostly dry thunderstorms. These storms will pose a risk of lightning-induced ignitions and strong-severe outflow winds. For details on the severe-storm risk, see the SPC Day 1 Convective Outlook. A mix of wet/dry thunderstorms (with higher storms coverage) are also expected farther north across east-central OR, though these storms should be accompanied by measurable rainfall. Lightning-induced ignitions will still be possible along the peripheries of rain cores. ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0201 AM CDT Sun Aug 03 2025 Valid 031200Z - 041200Z ...Synopsis... A midlevel trough will move eastward from the eastern Pacific into the Northwest through the period. Within the base of the trough, enhanced midlevel westerly flow will overspread a dry/deeply mixed boundary layer across the Great Basin during the afternoon. This will favor breezy/gusty surface winds (around 15-20 mph) amid single-digit to lower teens RH, and given receptive fuels, elevated fire-weather conditions are expected. Preceding the trough, forcing for ascent will aid in afternoon thunderstorm development across the northern Great Basin and Intermountain West. Across parts of northern CA, southeastern OR, and southwestern ID, inverted-V soundings (around 0.5-0.7 inch PW) and quick storm motions will lead to mostly dry thunderstorms. These storms will pose a risk of lightning-induced ignitions and strong-severe outflow winds. For details on the severe-storm risk, see the SPC Day 1 Convective Outlook. A mix of wet/dry thunderstorms (with higher storms coverage) are also expected farther north across east-central OR, though these storms should be accompanied by measurable rainfall. Lightning-induced ignitions will still be possible along the peripheries of rain cores. ..Weinman.. 08/03/2025 ...Please see www.spc.noaa.gov/fire for graphic product... Read more