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   FOUS11 KWBC 071904   
   QPFHSD   
      
   Probabilistic Heavy Snow and Icing Discussion   
   NWS Weather Prediction Center College Park MD   
   204 PM EST Sat Feb 7 2026   
      
   Valid 00Z Sun Feb 08 2026 - 00Z Wed Feb 11 2026   
      
      
   ...Southeast New England...=20   
   Day 1...   
      
   Ongoing convergent banding over southeast New England will continue   
   to shunt east as it gets further undercut by the Arctic cold front   
   which will shift offshore late evening. Remaining snow should taper   
   off this evening.   
      
      
   ...Pacific Northwest and Northern Rockies...=20   
   Days 1-2...   
      
   A trough axis pushes across western WA this evening with the   
   leading moisture axis maintaining moderate precip rates until the   
   overnight when they are shunted south. Snow levels on the WA   
   Cascades decrease from 6000ft to 4000ft tonight under height falls.=20   
   The primary trough axis pushes onshore the PacNW Sunday evening. This   
   wave will then continue to track east while deamplifying, reaching   
   the northern High Plains Monday.   
      
   This trough evolution will be accompanied by a modest subtropical   
   jet streak arcing meridionally downstream to provide overlapping   
   synoptic ascent. This lift will occur into a moistening column as   
   persistent SW flow ahead of the shortwave/trough axis will provide   
   a long duration of moisture advection with two rounds of heavy=20   
   precipitation extending from Oregon through the Northern Rockies.=20   
   Day 1 snow probs for >6" are 40-80% for the WA/OR Cascades above   
   about 5000ft and over the northern Rockies. Day 2 snow probs for   
   >6" are similar to Day 1 for the Cascades, but much greater across   
   the northern Rockies including 50-90% for the Tetons, Absarokas,   
   Sawtooths, Bitterroots, and through Glacier NP. Snow tapers off   
   Monday as the trough axis shifts onto the Plains.   
      
      
   ...Sierra Nevada and Great Basin...=20   
   Day 3...   
      
   The next shortwave trough from the Pacific shifts farther south   
   than more recent ones, reaching the central/northern CA coast late   
   Monday night, crossing the Great Basin Tuesday night. Snow levels   
   of 6000 to 7000ft can be expected on the Sierra Nevada with the   
   early snow Monday night and 5000 to 6000ft Tuesday as the trough   
   axis approaches. Day 3 snow probs for >6" are 50-80% over the   
   length of the Sierra Nevada. A welcome sight for skiers and those   
   with Sierra hydrology interests.   
      
      
   Jackson   
      
      
      
   ...Extreme Cold Key Messages are in effect and linked below...   
      
   https://urldefense.com/v3/__https://www.wpc.ncep.noaa.gov/key_messages/Late=   
   stKeyMessage_1.png__;!!DZ3fjg!-BeRRGW9T0baCl--AvirbLAP2kstK75nNVKBxmBURQ_C9=   
   uocuM5i-gTcobPUFZa9ROYAvgzvZ3UZTtfsdeDhIKBI4LY$=20   
      
      
   $$   
      
   =3D =3D =3D   
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   --- SBBSecho 3.28-Linux   
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