878
FXUS01 KWBC 270725
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
323 AM EDT FRI OCT 27 2023
VALID 12Z FRI OCT 27 2023 - 12Z SUN OCT 29 2023
...HEAVY RAIN AND SCATTERED FLASH FLOODING CHANCES EXTEND FROM THE
SOUTHERN PLAINS THROUGH THE LOWER OHIO VALLEY...
...MODERATE TO LOCALLY HEAVY SNOW FORECAST ACROSS THE CENTRAL
ROCKIES THIS WEEKEND...
...BITTER EARLY SEASON COLD SNAP EXPECTED ACROSS MUCH OF THE GREAT
PLAINS AND ROCKIES, WHILE RECORD-BREAKING WARMTH IS FOUND ACROSS
THE EAST AND GULF COAST...
THE MAIN WEATHER FEATURE IMPACTING THE NATION THROUGH THIS WEEKEND
WILL BE A STRONG AUTUMN FRONTAL BOUNDARY RESPONSIBLE FOR
SEPARATING RECORD-BREAKING WARMTH IN THE DEEP SOUTH AND EAST FROM
ANOMALOUS COLD IN THE NORTH-CENTRAL UNITED STATES. THIS FRONT WILL
ALSO ALLOW FOR A REGION OF SHOWERS AND THUNDERSTORMS TO FOCUS OVER
SIMILAR AREAS FOR MULTIPLE DAYS, LEADING TO LOCALLY HEAVY RAINFALL
AMOUNTS BETWEEN THE SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY.
HEAVY RAIN CHANCES ARE ANTICIPATED TO IMPACT CENTRAL AND NORTH
TEXAS, SOUTHEAST OKLAHOMA, AND SOUTHWEST ARKANSAS TODAY BEFORE
SPREADING FARTHER NORTHEAST ACROSS THE OZARKS AND FAR WESTERN
KENTUCKY ON SATURDAY. THE AFOREMENTIONED FRONTAL BOUNDARY IS
FORECAST TO LINGER ON SUNDAY AND CREATE ADDITIONAL HEAVY RAIN
CHANCES. GIVEN THE MULTIPLE ROUNDS OF MODERATE TO LOCALLY HEAVY
RAIN FOR THIS REGION, SCATTERED FLASH FLOODING IS POSSIBLE THROUGH
THE END OF THE WEEKEND. A SLIGHT RISK (LEVEL 2/4) OF EXCESSIVE
RAINFALL HAS BEEN ISSUED FOR EACH DAY THROUGH SUNDAY ACROSS THE
PREVIOUSLY MENTIONED LOCATIONS.
AS THE FRONTAL BOUNDARY BANKS UP AGAINST THE ROCKIES AND AN UPPER
TROUGH DIGS ACROSS THE INTERMOUNTAIN WEST ON SATURDAY, HEAVY
SNOWFALL IS EXPECTED TO IMPACT THE CENTRAL ROCKIES WITH LIGHTER
AMOUNTS STRETCHING EASTWARD INTO THE NEBRASKA SANDHILLS. WINTER
STORM WATCHES HAVE BEEN ISSUED FOR THE MOUNTAINOUS TERRAIN OF
WESTERN COLORADO, WHERE THERE IS A HIGH PROBABILITY (>70%) OF
TOTAL SNOWFALL AMOUNTS EXCEEDING 8 INCHES. SNOW IS ALSO LIKELY TO
REACH INTO THE COLORADO FRONT RANGE (INCLUDING THE DENVER
METROPOLITAN AREA), WITH HIGH PROBABILITIES FOR GREATER THAN 4
INCHES OF TOTAL SNOWFALL ENDING SUNDAY MIDDAY. A POTENT HIGH
PRESSURE SYSTEM NOSING SOUTHWARD INTO THE NORTHERN/CENTRAL HIGH
PLAINS WILL PRODUCE PLENTY OF COLD AIR FOR THE AFOREMENTIONED
SNOWFALL, WHILE ALSO LEADING TO SINGLE DIGIT LOW TEMPERATURES
ACROSS PARTS OF MONTANA, WYOMING, AND NORTH DAKOTA. A FEW DAILY
LOW TEMPERATURE RECORDS ARE NOT OUT OF THE QUESTION SATURDAY
MORNING AND GIVES THE NORTHERN HIGH PLAINS AN EARLY DOSE OF
MID-WINTER WEATHER.
MEANWHILE, OPPOSITE OF THE BITTER COLD IN THE NORTH-CENTRAL U.S.,
SUMMER-LIKE TEMPERATURES ARE IN THE FORECAST FROM THE TENNESSEE
VALLEY TO THE NORTHEAST THROUGH AT LEAST EARLY THIS WEEKEND.
STRONG SOUTHERLY FLOW AHEAD OF THE APPROACHING FRONTAL BOUNDARY
WILL CREATE DRY CONDITIONS AND TEMPERATURES 10 TO 30 DEGREES ABOVE
LATE-OCTOBER AVERAGES. AFTERNOON HIGHS ARE FORECAST TO REACH INTO
THE LOW-TO-MID 80S FOR MOST LOCATIONS AND COULD BREAK NUMEROUS
DAILY HIGH TEMPERATURE RECORDS. A QUICK REPRIEVE BACK TO COOLER
WEATHER SHOULD ENTER THE NORTHEAST AND NORTHERN MID-ATLANTIC ON
SUNDAY ALONG WITH SHOWER CHANCES, WHILE HIGHS INTO THE 80S REMAIN
ACROSS THE TENNESSEE VALLEY AND SOUTHEAST.
SNELL
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