834
FXUS01 KWBC 180738
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
238 AM EST THU DEC 18 2025
VALID 12Z THU DEC 18 2025 - 12Z SAT DEC 20 2025
...DANGEROUS WIND GUSTS AND HEAVY SNOW TO PRODUCE HAZARDOUS TRAVEL
AND INFRASTRUCTURE IMPACTS FROM THE NORTHWEST TO NORTH-CENTRAL
U.S....
...HEAVY RAIN LIKELY OVER PORTIONS OF THE PACIFIC NORTHWEST WHILE
HEAVY SNOW CONTINUES FOR THE MOUNTAINS OF THE PACIFIC NORTHWEST
AND NORTHERN ROCKIES...
...ABOVE AVERAGE TEMPERATURES ACROSS MOST OF THE COUNTRY TO END
THE WEEK WITH NUMEROUS POSSIBLE RECORD-TYING/BREAKING TEMPS IN THE
WESTERN U.S. AND NORTHEAST/MID-ATLANTIC...
AN AMPLIFIED UPPER-TROUGH WILL PIVOT FROM THE NORTH-CENTRAL U.S.
THROUGH THE NORTHEAST OVER THE NEXT COUPLE OF DAYS. AT THE
SURFACE, WIDESPREAD WIND GUSTS OF 50-80 MPH WILL CONTINUE FOR MUCH
OF THE NORTHERN/CENTRAL PLAINS AND CENTRAL ROCKIES TODAY. EXPECT
NUMEROUS POWER OUTAGES, PROPERTY DAMAGE AND DANGEROUS TRAVEL. HIGH
WIND WARNINGS ARE IN EFFECT FOR THESE AREAS. A POWERFUL LOW
PRESSURE SYSTEM WILL BRING HIGH WINDS AND LIGHT TO MODERATE
SNOWFALL THAT WILL COMBINE TO CREATE WHITEOUT CONDITIONS ACROSS
THE NORTHERN PLAINS INTO EARLY THIS EVENING. VISIBILITY WILL DROP
RAPIDLY AND PERSIST IN AREAS OF BLOWING SNOW, MAKING TRAVEL
EXTREMELY HAZARDOUS. BLIZZARD WARNINGS ARE IN EFFECT FOR PARTS OF
FAR NORTHEASTERN MONTANA, MUCH OF NORTH DAKOTA AND PORTIONS OF
NORTHWESTERN MINNESOTA. AS THE STORM SYSTEM PUSHES EAST, GUSTY
WINDS UP TO 60 MPH, LOCALLY HEAVY RAIN, AND LAKE EFFECT SNOW WILL
LIKELY IMPACT THE NORTHEAST U.S. ON FRIDAY. THIS MAY LEAD TO
SCATTERED POWER OUTAGES, TREE DAMAGE, AND DELAYED TRAVEL TIMES.
WIND ADVISORIES ARE IN EFFECT FOR MUCH OF THE NORTHEAST AND
NORTHERN MID-ATLANTIC.
PERSISTENT TROUGHING WITH EMBEDDED SHORTWAVE TROUGHS CYCLING
THROUGH WILL PRODUCE HEAVY RAIN ALONG THE PACIFIC NORTHWEST COAST
AND HEAVY MOUNTAIN SNOW ACROSS THE NORTHWEST MOUNTAIN RANGES
INCLUDING THE NORTHERN ROCKIES THROUGH THE END OF THE WEEK. THE
FIRST ROUND OF PRECIPITATION WILL ARRIVE TODAY ALONGSIDE A DEEP
SURFACE LOW PRESSURE SYSTEM. HEAVY RAIN IS EXPECTED TO OCCUR OVER
PORTIONS OF SOUTHWESTERN WASHINGTON THROUGH WESTERN OREGON AND
NORTHWESTERN CALIFORNIA, WHERE A SLIGHT RISK (AT LEAST 15% CHANCE)
OF EXCESSIVE RAINFALL LEADING TO FLASH FLOODING IS IN EFFECT. THIS
HEAVY RAINFALL WILL EXACERBATE ONGOING FLOODING OF RIVERS, CREEKS
AND SMALL STREAMS ACROSS THE PACIFIC NORTHWEST. FLOOD WARNINGS ARE
IN EFFECT AS WELL. LANDSLIDES IN AREAS OF STEEP TERRAIN AND DEBRIS
FLOWS OVER RECENTLY BURNED AREAS ARE ALSO POTENTIAL HAZARDS. THE
AFOREMENTIONED RAIN AND ASSOCIATED HAZARDS SHIFT SOUTH ALONG WITH
THE ASSOCIATED COLD FRONT ON FRIDAY. ANOTHER SLIGHT RISK OF
EXCESSIVE RAINFALL WILL BE IN EFFECT FOR PARTS OF FAR SOUTHWESTERN
OREGON INTO NORTHWESTERN CALIFORNIA.
AN UPPER-LEVEL RIDGE IN THE WEST WILL SUPPORT ABOVE AVERAGE
TEMPERATURES FOR MUCH OF THE REGION, SAVE FOR CALIFORNIA'S CENTRAL
VALLEY, THROUGH THE WEEKEND. WIDESPREAD HIGH MAXIMUM AND MINIMUM
TEMPERATURE RECORDS MAY BE TIED OR BROKEN ON FRIDAY/FRIDAY NIGHT.
THE AMPLIFIED UPPER TROUGH PIVOTING ACROSS THE CENTRAL AND EASTERN
U.S. WILL GENERATE STRONG SOUTHERLY FLOW/WINDS INTO THE EAST COAST
ON FRIDAY, LEADING TO ANOMALOUSLY WARM CONDITIONS. NUMEROUS HIGH
MAXIMUM AND MINIMUM TEMPERATURES ARE EXPECTED OUT AHEAD OF THE
DEEP SURFACE LOW PRESSURE SYSTEM APPROACHING FROM THE MIDWEST ON
FRIDAY/FRIDAY EVENING AS A RESULT. SCATTERED SHOWERS AND
THUNDERSTORMS WILL ALSO SPREAD FROM THE MISSISSIPPI VALLEY TO THE
EAST COAST THROUGH FRIDAY AFTERNOON.
KEBEDE
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