Hydrologic Outlook issued February 21 at 2:16PM MST by NWS Missoula MT
ESFMSO Where: Powell, Deer Lodge, and Silver Bow Counties in Montana and Lemhi County in Idaho. What: A significant warm up is expected this weekend into early next week (February 24). High temperatures will reach into the 40s, with overnight temperatures near or above freezing. Rapid lowland snowmelt will lead to ponding of water in low lying areas, especially in areas of poor drainage and/or in basements/crawlspaces. Ice jam releases are also a concern on small streams and/or creeks, and may lead to localized flooding. Rain showers will bring precipitation totals up to 0.20 inches across valley areas Sunday into
Hydrologic Outlook issued February 21 at 1:23PM MST by NWS Pocatello ID
ESFPIH Temperatures will gradually warm this weekend into early next week, increasing low elevation snowmelt and runoff, potentially leading to minor lowland flooding. Locations most prone to rapid snowmelt include areas below 6000 ft across the Eastern Magic Valley, Lower Snake Plain, and South Hills. In these areas, the increased runoff on top of frozen or saturated ground may lead to ponding of water or sheet flooding in low lying or poor drainage areas, along with rises on small streams and creeks. These warming temperatures will peak on Monday, with afternoon highs reaching the 50s at lower elevations. Low temperatures
Hydrologic Outlook issued February 21 at 11:51AM PST by NWS Spokane WA
ESFOTX Where: Spokane, Whitman, Asotin, and Garfield Counties in Washington. Kootenai, Shoshone, Benewah, Latah, Nez Perce, and Lewis Counties in Idaho. What: An atmospheric river will deliver warm, rainy, and breezy weather to the region this weekend into early next week. High temperatures Sunday and Monday will warm into the upper 40s to low 50s. Additionally, rainfall amounts of 0.60 to 1.25 inches in the lowlands and 1 to 2 inches in the mountains are currently forecasted. Rapid lowland snowmelt will lead to rises on area creeks, streams, and rivers. Paradise Creek in Moscow is currently forecasted to reach Minor
SPC Feb 22, 2025 0100 UTC Day 1 Convective Outlook
SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0618 PM CST Fri Feb 21 2025 Valid 220100Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms remain unlikely through tonight. ...Discussion... High pressure will remain situated over the majority of the CONUS through tonight, with any appreciable low-level moisture well offshore into the western Gulf. While a shortwave trough will move across AZ and NM tonight, loss of heating should minimize lapse rates and instability there. ..Jewell.. 02/22/2025 Read more
SPC Feb 21, 2025 2000 UTC Day 1 Convective Outlook
SPC 2000Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0156 PM CST Fri Feb 21 2025 Valid 212000Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears very low across the U.S. today through tonight. ...20Z Update... A small cluster of elevated convection developed earlier today across the Brush Country region of south TX, with sporadic lightning flashes noted. This elevated convection was apparently driven by sufficient ascent/moistening near the base of the EML noted on the 12Z CRP sounding, and aided by a weak midlevel shortwave trough moving across the
Hydrologic Outlook issued February 21 at 4:45PM MST by NWS Billings MT
ESFBYZ A deep and wet snowpack exists across the forecast area. 1 to 4 inches of water is locked in this snowpack. Warmer temperatures forecast over the coming days will increase snowmelt, releasing this water. With the ground frozen, water will not be able to soak in and will run off. Water flowing overland and accumulating in low lying areas may result in localized flooding. Water flowing into creeks and rivers will increase the potential for ice jam development and may result in additional flooding near waterways. Localized impacts from snowmelt may be ongoing over the western foothills and valleys.
Hydrologic Outlook issued February 21 at 3:24PM PST by NWS Pendleton OR
ESFPDT Synopsis: Rain and high mountain snow from and multiple systems this weekend and early next week will lead to rising water levels on area streams and rivers. Rainfall amounts of 2 to 5 inches are expected in the Cascades and 1 to 3 inches in the eastern Oregon mountains. In addition, temperatures will be rising to the 40s and lower 50s in the mountains which will lead to snow melt adding even more water to area rivers and streams. The National Water Model is highlighting high water on numerous smaller streams and creeks, but streamflow amounts are generally only
Hydrologic Outlook issued February 21 at 3:46PM MST by NWS Glasgow MT
ESFGGW Where: All of Northeast Montana. When: Saturday afternoon through the end of February. What: As arctic air pushes east into the central plains, a ridge will move in to bring temperatures above average from Sunday through the end of the week. Although temperatures each night will drop near or below freezing, warm daytime temperatures will increase snowmelt and lead to ponding in low lying areas. There is moderate confidence precipitation amounts are expected to remain below one tenth of an inch Sunday night into Monday night, so little to no impact on runoff is expected from this event. Make
SPC Feb 21, 2025 1300 UTC Day 1 Convective Outlook
SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0631 AM CST Fri Feb 21 2025 Valid 211300Z - 221200Z ...NO THUNDERSTORM AREAS FORECAST... ...SUMMARY... The risk for thunderstorms appears negligible across the U.S. today through tonight. ...Synopsis... Early morning surface analysis places the center of an expansive area of high pressure over MO. This area of high pressure (and its associated continental arctic airmass) is gradually expected to shift eastward throughout the day as shortwave trough progresses across the central Plains and into the Mid MS Valley. This evolution will maintain low-level offshore
SPC Feb 21, 2025 Day 4-8 Severe Weather Outlook
Day 4-8 Outlook Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0321 AM CST Fri Feb 21 2025 Valid 241200Z - 011200Z ...DISCUSSION... A dry airmass will be in place across the CONUS for all of next week. A cold front will move south across the Gulf on Monday. While some moisture recovery will occur on Tuesday and Wednesday, another front will move into the northern Gulf on Wednesday night and keep moisture offshore. Therefore, thunderstorm activity should be minimal and severe thunderstorms remain unlikely through the extended forecast period. Read more