SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Day 2 Fire Weather Outlook

2 days 15 hours ago
SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0230 PM CDT Wed Jul 16 2025 Valid 171200Z - 181200Z Monsoon moisture across the Great Basin and Upper-Colorado River Basin will remain largely elevated at mid-levels with a sufficiently dry sub cloud layer to facilitate evaporation and subsequent minimal surface rainfall from high-based thunderstorms over higher terrain. Lightning ignition potential is lower across Arizona and New Mexico where deeper moisture profiles will promote more wetting rain cores. ..Williams.. 07/16/2025 .PREV DISCUSSION... /ISSUED 0142 AM CDT Wed Jul 16 2025/ ...Synopsis... Moisture will increase on D2/Thursday across the Southwest with a cut off low off the coast of Baja California. This moisture aided by upper-level forcing will bring an increase in thunderstorm activity across much of Arizona into southern Utah with increasing chances for wetting rainfall. On the fringes of the deeper moisture plume, isolated dry thunderstorms will be possible across portions of western Colorado into Utah, eastern Nevada, southern Idaho, and southwestern Wyoming. As such, a broad area of isolated dry thunderstorms was maintained with this outlook. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

SPC Severe Thunderstorm Watch 518 Status Reports

2 days 16 hours ago
WW 0518 Status Updates
STATUS REPORT ON WW 518 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW PIA TO 20 WSW JVL. ..MOSIER..07/16/25 ATTN...WFO...LOT...DVN... STATUS REPORT FOR WS 518 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC007-011-031-037-043-063-089-091-093-097-099-103-111-141-155- 197-201-161940- IL . ILLINOIS COUNTIES INCLUDED ARE BOONE BUREAU COOK DE KALB DUPAGE GRUNDY KANE KANKAKEE KENDALL LAKE LA SALLE LEE MCHENRY OGLE PUTNAM WILL WINNEBAGO INC089-127-161940- IN . INDIANA COUNTIES INCLUDED ARE LAKE PORTER LMZ740-741-742-743-744-745-777-779-161940- CW Read more

SPC Severe Thunderstorm Watch 518 Status Reports

2 days 16 hours ago
WW 0518 Status Updates
STATUS REPORT ON WW 518 SEVERE WEATHER THREAT CONTINUES RIGHT OF A LINE FROM 30 NNW PIA TO 20 WSW JVL. ..MOSIER..07/16/25 ATTN...WFO...LOT...DVN... STATUS REPORT FOR WS 518 SEVERE WEATHER THREAT CONTINUES FOR THE FOLLOWING AREAS ILC007-011-031-037-043-063-089-091-093-097-099-103-111-141-155- 197-201-161940- IL . ILLINOIS COUNTIES INCLUDED ARE BOONE BUREAU COOK DE KALB DUPAGE GRUNDY KANE KANKAKEE KENDALL LAKE LA SALLE LEE MCHENRY OGLE PUTNAM WILL WINNEBAGO INC089-127-161940- IN . INDIANA COUNTIES INCLUDED ARE LAKE PORTER LMZ740-741-742-743-744-745-777-779-161940- CW Read more

SPC MD 1684

2 days 16 hours ago
MD 1684 CONCERNING SEVERE POTENTIAL...WATCH LIKELY FOR FAR EASTERN IA...SOUTHERN/CENTRAL WI...NORTHERN IL
Mesoscale Discussion 1684 NWS Storm Prediction Center Norman OK 1145 AM CDT Wed Jul 16 2025 Areas affected...Far Eastern IA...Southern/Central WI...Northern IL Concerning...Severe potential...Watch likely Valid 161645Z - 161845Z Probability of Watch Issuance...80 percent SUMMARY...Thunderstorm intensity and coverage is expected to increase from far eastern IA into southern/central WI and northern IL this afternoon. All severe hazards will be possible with the more mature/long-lived storms, including a few tornadoes. DISCUSSION...Recent surface analysis places a low about 40 miles east-northeast of ALO in far northeast IA. A warm front extends northeastward from this low into south-central WI before arcing more eastward and then southeastward into southern Lake Michigan. Additionally, a surface trough extends southward from this low across far eastern IA, while a cold front also extends southwestward across south-central IA into central KS. Modest mid-level warm-air advection attendant to the parent shortwave trough has promoted surface-based thunderstorm within the warm sector south of the warm front across far southwest WI and far northwest IL. There is potential for this activity to strengthen as the airmass downstream across central/southern WI destabilizes amid filtered daytime heating. Additional thunderstorm development is also possible along the surface trough as it pushes eastward into the region this afternoon. Ample low-level moisture within the warm sector is supporting moderate buoyancy, despite poor mid-level lapse rates. Vertical shear is enhanced by slightly stronger low to mid-level flow close to the approaching shortwave. The resulting combination of instability and shear will support organized storm structures, including a few supercells. Low-level flow will be relatively modest, but ample low-level instability and increased low-level vorticity close to the surface low could still result in a few tornadoes. Some isolated hail could also occur with the more cellular storms, but damaging gusts will likely be the primary risk, particularly with any bowing segments that materialize. ..Mosier/Smith.. 07/16/2025 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...GRB...LOT...MKX...DVN...ARX... LAT...LON 43369135 44089009 43948850 43168789 41988818 41519064 43369135 MOST PROBABLE PEAK TORNADO INTENSITY...100-130 MPH MOST PROBABLE PEAK WIND GUST...55-70 MPH MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN Read more
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