664
FXUS01 KWBC 280743
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
342 AM EDT FRI APR 28 2023
VALID 12Z FRI APR 28 2023 - 12Z SUN APR 30 2023
...MULTIPLE ROUNDS OF SHOWERS AND THUNDERSTORMS WILL LEAD TO
INCREASED HEAVY RAINFALL CHANCES ACROSS EASTERN SEABOARD AND GULF
COAST THROUGH SUNDAY...
...SEVERE THUNDERSTORMS POSSIBLE IN EASTERN TEXAS ON FRIDAY AHEAD
OF ADVANCING COLD FRONT...
...WARM AND DRY CONDITIONS EXPECTED THIS WEEKEND WEST OF THE
CONTINENTAL DIVIDE...
A SLOW-MOVING UPPER TROUGH WILL LEAD TO AN ACTIVE PATTERN TAKING
SHAPE ACROSS THE EASTERN HALF OF THE COUNTRY THIS WEEKEND, WITH
MULTIPLE ROUNDS OF HEAVY RAINFALL EXPECTED THROUGH SUNDAY MORNING.
AS A DEVELOPING STORM SYSTEM SLOWLY TRACKS NORTHEASTWARD THROUGH
THE MID-ATLANTIC ON FRIDAY, MODERATE TO HEAVY RAIN WILL OVERTAKE
MUCH OF THE REGION AS WARM, MOIST AIR SURGES NORTHWARD BEHIND A
LIFTING WARM FRONT, WITH RAINFALL TOTALS OF 1-2" STRETCHING FROM
NORTHERN VIRGINIA THROUGH NEW JERSEY. LOCALIZED AREAS MAY RECEIVE
3"+, RESULTING IN A SLIGHT RISK OF EXCESSIVE RAINFALL CONTOUR
HOISTED FOR AREAS IN AND AROUND WASHINGTON D.C., AND BALTIMORE.
CONDITIONS WILL IMPROVE FROM SOUTH TO NORTH THROUGHOUT THE DAYTIME
FRIDAY HOURS, WITH THE BULK OF THE PRECIPITATION BECOMING LIGHTER
BY SATURDAY MORNING ACROSS PORTIONS OF THE NORTHEAST AND SOUTHERN
NEW ENGLAND.
FURTHER WEST, A COLD FRONT PROGRESSING EASTWARD ACROSS THE PLAINS
WILL LEAD TO HEIGHTENED CHANCES OF SHOWERS AND THUNDERSTORMS,
ESPECIALLY ON THE SOUTHERN FLANK OF THE BOUNDARY, AS A MULTITUDE
OF FEATURES, INCLUDING A DEVELOPING DRYLINE, A WARM FRONT, AND A
SURFACE LOW, AID IN THE DEVELOPMENT OF SUPERCELLS. AS A RESULT,
THE STORM PREDICTION CENTER HAS ISSUED AN ENHANCED RISK OF SEVERE
THUNDERSTORMS FOR MUCH OF EASTERN TEXAS, WITH LARGE POPULATION
CENTERS INCLUDING THE DALLAS-FORT WORTH, SAN ANTONIO, AND AUSTIN
METRO AREAS UNDER THE RISK OF DAMAGING WINDS, LARGE HAIL, AND
TORNADOES ON FRIDAY. A FORMING SURFACE LOW WILL PUSH OFFSHORE INTO
THE GULF OF MEXICO EARLY SATURDAY, WITH RAINFALL CHANCES
INCREASING ACROSS PORTIONS OF THE IMMEDIATE GULF COAST AS WARM,
MOIST AIR STREAMS NORTHWARD BEHIND A WARM FRONT. MULTIPLE ROUNDS
OF POTENTIALLY HEAVY RAINFALL ARE EXPECTED FROM EARLY SATURDAY
INTO THE EVENING HOURS, LEADING TO A SLIGHT RISK OF EXCESSIVE
RAINFALL BEING ISSUED FOR THE FLORIDA PANHANDLE, SOUTHEASTERN
ALABAMA, AND SOUTHERN GEORGIA, AS A BROAD AREA OF 1-2 INCH
RAINFALL TOTALS, AND HOURLY RAINFALL RATES APPROACHING 2"/HR ARE
POSSIBLE. SEVERE THUNDERSTORMS ARE POSSIBLE ALONG THE FLORIDA
PANHANDLE, WITH DAMAGING WINDS AND A FEW TORNADOES BEING THE
PRIMARY THREATS.
ELSEWHERE, CONDITIONS WILL BE PLEASANT AND TRANQUIL THIS WEEKEND
ACROSS THE WEST COAST, AS PERSISTENT UPPER-LEVEL RIDGING KEEPS
TEMPERATURES 15-25 DEGREES ABOVE NORMAL FOR AREAS WEST OF THE
CONTINENTAL DIVIDE. WIDESPREAD HIGH TEMPERATURES IN THE 80S ARE
EXPECTED THROUGHOUT INTERIOR SECTIONS OF THE PACIFIC NORTHWEST,
WHILE LOCATIONS FURTHER SOUTH, INCLUDING CALIFORNIA'S CENTRAL
VALLEY AND THE MOJAVE/SONORAN DESERTS, REACH THE 90S AND EVEN 100S
IN LOCALIZED AREAS. Â
RUSSELL
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