Wyoming Spring Runoff 2020 Flood Potential--issued Feb 28th

Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

A strong atmospheric river will bring prolonged heavy rainfall along with gusty winds to the Pacific Northwest through much of this week. The heavy rainfall may lead to widespread urban and river flooding. Accumulating snow is expected over parts of the central Appalachians and Mid-Atlantic today as well as the Upper Midwest and the Upper Great Lakes this evening into Tuesday. Read More >

Quick Synopsis:

--Late February snowpack and/or SWEs were above average (105 to 115% of median) across almost all major basins in Wyoming. The highest SWEs were over the Big Horn Mountains and the Sierra Madre Mountains (southern Wyoming).â€‹

--Above average snow depths across western Wyoming.

--Above average soil moisture percentages across basins in northeastern Wyoming and potions of the Wind River Basin; below average soil moisture percentages across southern Wyoming.

--Widespread pine bark beetle damage (2010-2018) across the Upper North Platte, Little Snake, Laramie, and Wind River Basins.

--No significant precipitation trends during the spring runoff season (May – July). Above average temperatures are expected across central to western Wyoming during the runoff season.

Highlights:

…Low to Moderate potential for snowmelt runoff flooding is forecasted along the portions of the Laramie and the Salt River Basins (far western Wyoming)…

…All other of headwater basins across Wyoming can expect a generally Low potential for flooding due to springtime snowmelt runoff...

The current Wyoming Spring 2020 Snowmelt Runoff Flood Potential Outlook graphic:

Strong Atmospheric River Bringing Heavy Rain to the Pacific Northwest; Areas of Snow in the North-Central and Eastern U.S.

Wyoming Spring Runoff 2020 Flood Potential--issued Feb 28th

Quick Synopsis:

Highlights:

Wyoming Spring Runoff 2020 Flood Potential Briefing: