Hydrologic Outlook issued February 22 at 1:55PM 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 22 at 5:15AM MST by NWS Boise ID
ESFBOI Moderate to heavy rain and low elevation snowmelt Sunday and Monday will lead to rises on rivers, creeks, and streams across portions of southeast Oregon and southwest Idaho (particularly the Weiser River Basin). Saturated or frozen soils in some areas will increase runoff. Snow and ice may clog culverts and ditches causing water to back-up and pond in low lying and poor drainage areas. Additionally, ice jams could develop on any rivers, creeks, or streams with existing ice cover and cause localized flooding. Rivers in these areas will continue to run high through next week with some waterways potentially
Hydrologic Outlook issued February 21 at 11:50AM MST by NWS Riverton WY
ESFRIW Low elevation snowpack of around 6 to 12 inches exists across much of the northern portion of the Bighorn Basin including Greybull, Lovell, Powell, and Cody. This snowpack contains an estimated 2 to 4 inches of Snow Water Equivalent (SWE). Temperatures beginning Sunday are expected to climb into the mid 40s to low 50s. The warm temperatures are expected to persist through at least the middle of next week. The warm temperatures, combined with the significant low elevation snowpack, could result in significant melting and injection into local rivers and streams. Ice break up on the Bighorn and Nowood
Hydrologic Outlook issued February 21 at 11:55AM PST by NWS Seattle WA
ESFSEW A series of storms will begin to impact western Washington on Friday and continue through Tuesday. The next storm on Saturday will have heavy rain at times as will a third storm right on its heels Sunday. Precipitation amounts could be 3 to 5 inches storm total with locally heavier amounts, and snow levels rising above 7000 feet. With moderate temperatures now and warmer temperatures to come, this will also result in some snow melt at low to mid elevations. These factors will combine to result in a potential for river flooding. The most likely areas for river flooding
Hydrologic Outlook issued February 21 at 2:41PM CST by NWS Bismarck ND
ESFBIS Much of North Dakota will be going into late February with consecutive days of unseasonably warm temperatures in the forecast. Highs well above freezing across the southwest and south-central are likely with those warm temperatures decreasing to around freezing, or just above freezing in the northwestern and north-central counties. In short, the modest snowpack south and west of a line from Williams County, through southern Ward County, and on down to Jamestown will melt over the remainder of February into early March. In general, there is not enough water in the above snowpack to warrant significant concerns with flooding.
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
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