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SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook RESENT 1 NWS Storm Prediction Center Norman OK 0127 PM CST Tue Feb 21 2023 Valid 211630Z - 221200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS THE MID-ATLANTIC AND SOUTHERN PLAINS... ...SUMMARY... Isolated thunderstorms capable of locally damaging winds will be possible across parts of the Mid-Atlantic from about Noon to 4 PM EST. Isolated severe wind and hail will be possible after 2 AM CST across a portion of western north Texas into central Oklahoma. ...Mid-Atlantic States... A low-amplitude shortwave trough over southern Ontario and the Lower Great Lakes will continue east-northeastward toward New England tonight. Boundary layer moisture will remain limited within the post-coastal frontal environment, but cloud breaks/moderate heating and 40s F surface dewpoints will lead to weak destabilization early this afternoon. This could allow for the development of some low-topped thunderstorms (less than 25k ft) across eastern Pennsylvania to New Jersey and the Delmarva vicinity. A few storms could produce small hail this afternoon along with strong/convectively enhanced wind gusts, particularly given the strength of the background west-southwesterly low/mid-tropospheric winds. ...Southern Great Plains... Influenced by a southern-stream low-latitude trough that will reach eastern New Mexico/far west Texas tonight, late-day lee cyclogenesis and a strengthening of southerly low-level winds will influence additional moistening across the region. Initially modest moisture and residual capping will likely preclude thunderstorm development until later tonight. A narrow corridor of meager boundary-layer destabilization with MLCAPE of 250-500 J/kg is anticipated to evolve late tonight and early Wednesday ahead of a sharpening cold front ejecting eastward from the High Plains. Strengthening forcing for ascent downstream of an elongated shortwave trough over the southern High Plains will support increasing convective development, especially in the 09-12Z time frame. A few instances of severe hail and/or wind may occur across southwest/central Oklahoma and western North Texas. ...East-central Illinois to southwest Ohio... Elevated convection is expected to develop late tonight/early Wednesday amid strengthening lower-level warm theta-e advection. Most of this activity should occur within scant elevated buoyancy, but strong speed shear through the cloud-bearing layer may support small hail in the more robust updrafts. ..Guyer/Supinie.. 02/21/2023 Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0120 PM CST Tue Feb 21 2023 Valid 211700Z - 221200Z ...Southern High Plains... Overall, the forecast is on track and largely unchanged. Considerable uncertainty remains with respect to area RH values this afternoon and evening. Mid and high cloud cover will likely reduce heating through the afternoon hours with only spotty coverage of RH below 20% likely over portions of the OK Panhandle. However, strong southwesterly winds will be likely over much of the southern High Plains this afternoon. While fuels and RH values will limit higher end fire-weather potential, strong winds and pockets of dry fine fuels should support a few hours of elevated to locally critical fire-weather concerns. ..Lyons.. 02/21/2023 .PREV DISCUSSION... /ISSUED 1245 AM CST Tue Feb 21 2023/ ...Synopsis... An upper-level trough near Baja will eject into the southern High Plains by late tonight. At the surface, a low will deepen in the southern/central High Plains vicinity. Strong surface winds are expected to develop in association with the surface low across the region. ...Southern High Plains... Surface winds are expected to increase to 20-30 mph over a broad area as the surface pressure gradient strengthens. RH will continue to be a major source of uncertainty. With the approach of the trough from the west, high/mid-level clouds are expected to increase across the Southwest into Texas and Oklahoma. Along the northern fringe of the cloud deck, additional heating may allow RH to fall as low as 15% in parts of the Panhandles into southeast Colorado and southwest Kansas. Farther south and east, RH of 20-25% becomes much more likely. Another factor mitigating the impacts of the strong winds will be the modestly receptive fuels. Critical conditions will most likely occur in the vicinity of the Oklahoma Panhandle. Aside from the lack of critically dry fuels, critical conditions may also be relatively brief in any one location as the cloud deck will likely shift north during the day. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

A new adaptive boat ramp was installed at Callville Bay in mid-January, allowing boat access despite falling water levels. Callville Bay previously closed in March 2022, forcing boaters to travel to Hemenway Harbor to launch. KTNV-TV Online (Las Vegas, Nev.), Feb 21, 2023

Residents of Fort Myers were urged to conserve water as water use was higher than normal, and the area was abnormally dry to moderately dry on the U.S. Drought Monitor. Water use was highest in 2022 at an average of 8.8 million gallons daily. Recent water use has topped that at an average of 9.1 million gallons of water daily and continued to rise. WGCU 90.1 FM Fort Myers (Fla.), Feb 20, 2023

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0150 PM CST Mon Feb 20 2023 Valid 202000Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected through tonight. ...Discussion... Aside from minor areal adjustments, no changes are required to the ongoing forecast. Severe storms are not expected. ..Goss.. 02/20/2023 .PREV DISCUSSION... /ISSUED 1022 AM CST Mon Feb 20 2023/ ...Tennessee Valley/Lower Mississippi Valley... A low-amplitude upper flow regime will persist over the CONUS including split flow over the West. Low-level moistening will occur through tonight to the south of a front across the Ozarks and lower/middle Ohio River Valley. A modest increase in forcing for ascent and weak elevated buoyancy should yield some elevated thunderstorms after sunset, especially late this evening into the overnight from the Lower Mississippi Valley to the Tennessee Valley. Read more

No watches are valid as of Mon Feb 20 19:54:02 UTC 2023.

No Mesoscale Discussions are in effect as of Mon Feb 20 19:54:02 UTC 2023.

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0143 PM CST Mon Feb 20 2023 Valid 211200Z - 221200Z The forecast remains on track with only minor adjustments needed. The primary change was to expand the elevated risk area further northward into southwest KS where dry southerly flow on the eastern periphery of the surface low should result in 15-25 mph winds coincident with RH values near 20%. A broad region of elevated conditions is expected, and critical wind/RH conditions are most likely across the northern TX Panhandle into the OK Panhandle. However, fuel status remains questionable across much of the region per latest fuel analyses and guidance. See the previous discussion below for additional details. ..Moore.. 02/20/2023 .PREV DISCUSSION... /ISSUED 0100 AM CST Mon Feb 20 2023/ ...Synopsis... The cut-off low near Baja will continue eastward, become more of an open wave as it moves through the Southwest. Moderate to strong mid-level flow will be situated within the southern Rockies. More significant deepening of a High Plains low is expected on Monday. Low-level winds will increase as a result across parts of the southern and central Plains areas. Winds of 15-30 mph appear possible from West Texas into western Oklahoma, southwestern Kansas, and near the terrain in southeast Colorado. Fuels have continued to dry under the influence of previous days of dry/breezy conditions. Still, some impact will remain from recent snowfall, particularly for areas farther north/west and the driest fuels will not be significantly below average for this time of year. Despite some spread in model guidance, it does seem reasonable to expect RH to fall to around 15 to 20% in some areas. Broad elevated to locally critical conditions are expected given the strong winds and low RH. As mentioned, a lack of more receptive fuels will limit the overall threat for ignitions/spread. ...Please see www.spc.noaa.gov/fire for graphic product... Read more

Governor Tina Kotek signed an executive order Feb.15, declaring drought emergencies in Crook and Jefferson counties. The declaration lets the state utilize various tools to help water users and also allows the Water Resources Department to expedite review processes and reduce fee schedules. KATU 2 (Portland, Ore.), Feb 16, 2023

Drought permits, or Emergency Use permits, may not be issued to Klamath County farmers and ranchers this year if an emergency drought declaration were to be made as above-ground water sources were too low. Whether permits will be issued depends on precipitation in coming months. Groundwater levels in the Klamath Basin have dropped significantly in recent years, 20 to 30 feet in the last three years, making additional access unsustainable. Jefferson Public Radio (Ashland, Ore.), Feb 10, 2023

The U.S. Bureau of Reclamation sent out a letter to water agencies, saying that 2023 was not a critically dry year at present, meaning that agencies with senior water rights could have their water allotments increased compared to 2022. The bureau's determination that 2023 is not a "critical water year," is based on a forecast that at least 4 million acre-feet of water will flow into Lake Shasta from Oct. 1, 2022 to Sept. 30, 2023. The letter from the Bureau does note, "For the first half of February, precipitation has been well below average which may result in reduced full natural inflows to Shasta Lake on which this declaration is based. Therefore, please take all necessary preparatory actions should conditions change such that the 2023 Year is declared to be a Critical Year." Redding Record Searchlight (Calif.), Feb 20, 2023

SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1129 AM CST Mon Feb 20 2023 Valid 211200Z - 221200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected across the U.S. on Tuesday. ...Discussion... Amplification of the upper flow field is expected across the U.S. Tuesday. This will occur as a low initially off the Baja coast is kicked eastward across northern Mexico toward the southern Plains, by an evolving trough now over the Gulf of Alaska that is expected to amplify and dig rapidly southward along the western NOAM coast. As this progression proceeds, and a large area of cyclonic flow evolves across the western half of the country, downstream ridging will amplify across the eastern states through latter stages of the period. Limited instability across the country will preclude any appreciable severe potential. Southerly flow evolving from the southern Plains and eventually into the Mid and Lower Mississippi/Tennessee/Ohio Valleys will advect higher theta-e air northward atop a stable boundary layer, resulting in widespread precipitation and embedded lightning across this area. Farther west, widespread showers are expected as troughing evolves, with some lightning possible in a few areas including portions of the West Coast, Great Basin, and Desert Southwest. ..Goss.. 02/20/2023 Read more

Oklahoma wheat growth and development was delayed mainly due to drought, although cold temperatures also factor into it. Forage amounts were also down this year, so producers did not get to graze this fall. Much of Oklahoma’s wheat, especially that intended for forage, was seeded late and was dusted in, due to extreme drought. Oklahoma State University (Stillwater, Okla.), Feb. 20, 2023

SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 1022 AM CST Mon Feb 20 2023 Valid 201630Z - 211200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Severe thunderstorms are not expected through tonight. ...Tennessee Valley/Lower Mississippi Valley... A low-amplitude upper flow regime will persist over the CONUS including split flow over the West. Low-level moistening will occur through tonight to the south of a front across the Ozarks and lower/middle Ohio River Valley. A modest increase in forcing for ascent and weak elevated buoyancy should yield some elevated thunderstorms after sunset, especially late this evening into the overnight from the Lower Mississippi Valley to the Tennessee Valley. ..Guyer/Weinman.. 02/20/2023 Read more

SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook NWS Storm Prediction Center Norman OK 1019 AM CST Mon Feb 20 2023 Valid 201200Z - 211200Z ...NO CRITICAL AREAS... ...Synopsis... A cut-off low aloft will continue to make very slow progress eastward toward the Baja Peninsula today. Moderate zonal flow across the southern Rockies will continue. A cold front from the Texas Panhandle into Oklahoma will stall. With some pressure gradient enhancement near the boundary, westerly winds across parts of the Texas Panhandle and South Plains could reach 15-25 mph. Fuels have been able to dry as conditions have been modestly dry and breezy recently. However, RH below critical thresholds remains questionable given high/mid-level clouds. Values near the boundary will likely fall to around 20% with some locally lower values. Farther south, RH will be higher. Locally elevated fire weather is possible in the Texas Panhandle into perhaps western Oklahoma. ..Wendt.. 02/20/2023 ...Please see www.spc.noaa.gov/fire for graphic product... Read more

No watches are valid as of Sun Feb 19 20:46:02 UTC 2023.

No Mesoscale Discussions are in effect as of Sun Feb 19 20:46:02 UTC 2023.

SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0153 PM CST Sun Feb 19 2023 Valid 192000Z - 201200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are not expected through tonight. ...Synopsis... No thunderstorms expected. ..Goss.. 02/19/2023 .PREV DISCUSSION... /ISSUED 1018 AM CST Sun Feb 19 2023/ ...Discussion... Conditions will remain unfavorable for thunderstorms. A few showers may develop across south Florida and/or near the Atlantic coast later today, but deeper convection capable of lightning is unlikely. Read more

SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook NWS Storm Prediction Center Norman OK 0140 PM CST Sun Feb 19 2023 Valid 201200Z - 211200Z ...NO CRITICAL AREAS... The previous forecast remains on track. Latest guidance continues to show slight displacement of the driest conditions (across southeast CO and southwest KS), and the strongest winds (across west TX and portions of the TX Panhandle and western OK). Localized elevated conditions remain possible over parts of the TX Panhandle, but confidence in the spatial extent of the threat, as well as fuel status across the region, remains limited. See the previous discussion for further details. ..Moore.. 02/19/2023 .PREV DISCUSSION... /ISSUED 1242 AM CST Sun Feb 19 2023/ ...Synopsis... For Monday, moderately strong mid-level winds will continue across the southern Rockies as the cut-off low over Baja becomes more of an open wave moving east. The sagging cold front in the southern Plains will stall within the Texas Panhandle and Oklahoma. Another lee low will eventually develop during the afternoon in southeast Colorado. The overall setup will be similar to what occurs on Sunday, though slightly shifted to the south. Surface winds of 15 to perhaps 25 mph in some locations will be possible in parts of eastern New Mexico into the Texas Panhandle and South Plains. However, RH will once again be a major question. High and mid-level clouds are expected especially with southward extent. Afternoon RH of 20-25% is expected to be relatively common. There again may exist a small corridor in the central/northern Panhandle vicinity that will be on the edge of the greater cloud cover. RH near 15% is possible within that zone. As with Sunday, locally elevated fire weather concerns are expected. ...Please see www.spc.noaa.gov/fire for graphic product... Read more