323
FXUS01 KWBC 230755
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
254 AM EST TUE JAN 23 2024
VALID 12Z TUE JAN 23 2024 - 12Z THU JAN 25 2024
...HEAVY RAINFALL AND CONCERNS FOR FLASH FLOODING WILL EXIST
THROUGH THURSDAY MORNING ACROSS THE LOWER MISSISSIPPI VALLEY...
...A SWATH OF FREEZING RAIN AND SOME ACCUMULATING SNOWFALL WILL
IMPACT PORTIONS OF THE MIDWEST, LOWER GREAT LAKES, AND THE
NORTHEAST...
...MUCH MILDER AIR WITH TEMPERATURES SURGING WELL ABOVE NORMAL CAN
BE EXPECTED BY THE MIDDLE OF THE WEEK FOR MUCH OF THE EASTERN HALF
OF THE COUNTRY...
TEMPERATURES ACROSS A VAST PORTION OF THE CENTRAL AND EASTERN U.S.
WILL MODERATE AS A SERIES OF STORM SYSTEMS FROM THE PACIFIC OCEAN
CROSS THE SOUTHWEST BEFORE EJECTING EAST ACROSS THE SOUTHERN
STATES. THIS PATTERN WILL BE FAVORABLE FOR WIDESPREAD AREA OF
UNSETTLED WEATHER FOR THE MIDWEST, OHIO VALLEY, GREAT LAKES,
NORTHEAST, AND LARGE AREAS OF THE SOUTH THROUGH THE MIDDLE OF THE
WEEK.
MULTIPLE WAVES OF LOW PRESSURE ADVANCING ALONG A SLOW-MOVING FRONT
ACROSS THE LOWER MISSISSIPPI VALLEY WILL ENCOUNTER A RESURGENCE OF
MOISTURE AND INSTABILITY FROM THE GULF OF MEXICO WHICH WILL AID IN
DEVELOPMENT OF HEAVY SHOWERS AND THUNDERSTORMS TODAY THROUGH
THURSDAY. SEVERAL INCHES IS EXPECTED WHICH WILL INCREASE THE
THREAT FOR FLOODING ACROSS THE SOUTH. THE WEATHER PREDICTION
CENTER HAS ISSUED A MODERATE RISK OF EXCESSIVE RAINFALL ACROSS
PORTIONS OF THESE AREAS, AND LOCALLY SIGNIFICANT FLASH FLOODING
MAY BE POSSIBLE GIVEN THE EXPECTATION OF AS MUCH AS 4 TO 8 INCHES
OF RAIN GOING THROUGH WEDNESDAY.
THE RESURGENCE OF WARM AIR AND MOISTURE NORTHWARD OVER THE
RETREATING COLD AIR WILL FOSTER AREAS OF FREEZING RAIN TODAY AND
INTO WEDNESDAY ACROSS AREAS OF THE MIDWEST, LOWER GREAT LAKES, AND
THE NORTHEAST. THE COLD AIR MAY STILL BE DEEP ENOUGH TO RESULT IN
SOME ACCUMULATING SNOWFALL AS WELL, AND ESPECIALLY FOR AREAS OF
LOWER MICHIGAN AND SOUTHWEST NEW YORK WHERE A FEW INCHES OF SNOW
WILL BE POSSIBLE. FOR AREAS WHERE FREEZING RAIN ARE EXPECTED,
THERE MAY BE AS MUCH AS A TENTH OF AN INCH OF ICE ACCRETION WHICH
WILL RESULT IN LOCALLY HAZARDOUS TRAVEL CONDITIONS.
THE SOUTHWEST WILL BE COOLER THROUGH MIDWEEK WAS THE FRONTAL
SYSTEMS PASS THROUGH. THE INTRUSION OF PACIFIC AIR DOWNSTREAM
ACROSS THE CENTRAL AND EASTERN U.S., AND SOUTHERLY FLOW OFF THE
GULF OF MEXICO, WILL RESULT IN CONSIDERABLY MILDER TEMPERATURES BY
MIDWEEK FOR THE EASTERN HALF OF THE COUNTRY. A FEW LOCATIONS MAY
HAVE DAILY HIGH TEMPERATURES AS MUCH AS 20 DEGREES ABOVE SEASONAL
AVERAGE BY WEDNESDAY.
CAMPBELL/ORRISON
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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