957
FXUS01 KWBC 010751
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
350 AM EDT WED NOV 01 2023
VALID 12Z WED NOV 01 2023 - 12Z FRI NOV 03 2023
...RECORD SETTING COLD AND SUBFREEZING TEMPERATURES TO SPAN
THROUGHOUT MUCH OF THE CENTRAL AND SOUTHERN UNITED STATES...
...ATMOSPHERIC RIVER USHERS IN WET WEATHER TO THE PACIFIC
NORTHWEST BY TONIGHT...
A STRONG HIGH PRESSURE SYSTEM SETTLING OVER THE LOWER MISSISSIPPI
VALLEY AND SOUTHERN PLAINS WILL ALLOW FOR FRIGID EARLY MORNING
TEMPERATURES TODAY. LOWS INTO THE TEENS AND 20S ARE EXPECTED
ACROSS MUCH OF THE CENTRAL/NORTHERN PLAINS, MIDWEST, GREAT LAKES,
AND OHIO/TENNESSEE VALLEYS, WHILE TEMPERATURES NEAR THE FREEZING
MARK SINK TOWARDS THE LOWER MISSISSIPPI VALLEY AND DEEP SOUTH.
FRIGID READINGS INTO THE TEENS ARE ALSO LIKELY ACROSS PARTS OF
NORTHERN MAINE. THESE COLD TEMPERATURES MAY BREAK SEVERAL DAILY
RECORD LOWS BETWEEN TEXAS AND WEST VIRGINIA, EQUATING TO AROUND 20
DEGREES BELOW AVERAGE. THIS FALL CHILL WILL SHIFT EASTWARD ON
THURSDAY MORNING, WITH SUBFREEZING TEMPERATURES EXPANDING ACROSS
THE SOUTHEAST AND MID-ATLANTIC. THE MAIN IMPACTS ASSOCIATED WITH
THE COLD CONDITIONS WILL BE ASSOCIATED WITH A FROST AND/OR FREEZE
THREAT. SENSITIVE VEGETATION MAY BE DAMAGED OR KILLED AND EXPOSED
WATER PIPES COULD BE DAMAGED IF PROPER PRECAUTIONS AREN'T TAKEN. A
CONTINUOUS AREA OF FREEZE WARNINGS AND WATCHES SPAN FROM CENTRAL
TEXAS TO SOUTHERN PENNSYLVANIA AND NEW JERSEY, INCLUDING MUCH OF
THE DEEP SOUTH, TENNESSEE VALLEY, AND SOUTHEAST. TEMPERATURES
SHOULD SLOWLY BEGIN TO MODERATE BACK TO NEAR AVERAGE BY THE END OF
THE WEEK AS THE AFOREMENTIONED HIGH PRESSURE SYSTEM GRADUALLY
WEAKENS AND SHIFTS EASTWARD.
A WET WEATHER PATTERN IS SET TO BEGIN ACROSS THE PACIFIC NORTHWEST
AS AN ATMOSPHERIC RIVER SURGES INLAND TONIGHT OVER WASHINGTON AND
OREGON. WARM PACIFIC AIR WILL ALLOW FOR SNOW LEVELS TO INCREASE
AND RAIN TO FALL ACROSS MOST OF THE CASCADES. A FEW INCHES OF RAIN
OVER THE CASCADES, COASTAL RANGES AND VALLEYS COULD LEAD TO
ISOLATED INSTANCES OF FLOODING OR RUNOFF CONCERNS. A MARGINAL RISK
(LEVEL 1/4) OF EXCESSIVE RAINFALL HAS BEEN ISSUED FOR THIS REGION
THROUGH THURSDAY. HEAVY SNOWFALL MAY ENTER THE YELLOWSTONE REGION
OF NORTHWEST WYOMING AND SOUTHWEST MONTANA ON THURSDAY AS MOISTURE
CONTINUES TO PROGRESS INLAND. HERE, MEDIUM PROBABILITIES (40-50%)
FOR AT LEAST 4 INCHES OF SNOWFALL EXIST. THE NEXT STORM SYSTEM
CONTAINING ANOTHER POTENTIAL ROUND OF HEAVY RAIN IS SET TO
APPROACH NORTHERN CALIFORNIA AND OREGON ON FRIDAY NIGHT
MOSTLY DRY CONDITIONS ARE EXPECTED ELSEWHERE ACROSS THE NATION.
LIGHT RAIN AND SNOW SHOWERS ARE POSSIBLE ACROSS THE NORTHEAST AND
LOWER GREAT LAKES TODAY AS A DEVELOPING LOW PRESSURE SYSTEM EXITS
THE WESTERN ATLANTIC OCEAN. STRONG NORTHEASTERLY FLOW BEHIND A
COLD FRONT COULD ALSO PRODUCE SCATTERED SHOWERS ALONG THE EASTERN
FLORIDA PENINSULA OVER THE NEXT FEW DAYS.
SNELL
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page