736
FXUS01 KWBC 202011
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 PM EDT SUN APR 20 2025
VALID 00Z MON APR 21 2025 - 00Z WED APR 23 2025
...AN INTENSIFYING LOW PRESSURE SYSTEM WILL BRING GUSTY WINDS AND
A SWATH OF HEAVY RAIN UP ACROSS MISSOURI AND EASTERN IOWA, SEVERE
THUNDERSTORMS FROM ARKANSAS TO MISSOURI THROUGH TONIGHT, THEN WET
SNOW ACROSS THE UPPER GREAT LAKES EARLY MONDAY MORNING...
...SCATTERED MOUNTAIN SNOW EXPECTED FOR THE NORTHERN ROCKIES ON
MONDAY, ALONG WITH SCATTERED SHOWERS AND EMBEDDED THUNDERSTORMS
ACROSS THE NORTHERN PLAINS INTO TUESDAY...
A LOW PRESSURE SYSTEM IS FORECAST TO INTENSIFY AND TRACK
RELATIVELY QUICKLY NORTHEASTWARD ACROSS THE CENTRAL PLAINS THIS
EVENING AND INTO THE UPPER MIDWEST BY MONDAY MORNING. A SWATH OF
HEAVY RAIN ACCOMPANIED WITH GUSTY WINDS AND A SLIGHT CHANCE OF
FLASH FLOODING IS EXPECTED TO DEVELOP AHEAD OF THE SYSTEM FROM
ARKANSAS THIS AFTERNOON INTO MISSOURI, AND EASTERN IOWA TONIGHT,
ALONG WITH STRONG TO POSSIBLY SEVERE THUNDERSTORMS. THE STORM
PREDICTION CENTER HAS ISSUED AN ENHANCED RISK OF SEVERE
THUNDERSTORMS FROM NORTHERN ARKANSAS INTO MUCH OF MISSOURI THROUGH
MONDAY MORNING. THE HAZARDS ASSOCIATED WITH THESE THUNDERSTORMS
ARE FREQUENT LIGHTNING, SEVERE THUNDERSTORM WIND GUSTS, HAIL,
ALONG WITH THE POSSIBILITY OF TORNADOES. THE LOW PRESSURE SYSTEM
WILL EXPAND IN SIZE AS IT MOVES ACROSS THE GREAT LAKES ON MONDAY
BEFORE MOVING AWAY INTO CANADA GOING INTO TUESDAY. COLDER AIR
WRAPPING AROUND THE SYSTEM IS ENOUGH TO BRING A PERIOD OF WET SNOW
ACROSS THE UPPER GREAT LAKES NEAR THE WEST END OF LAKE SUPERIOR
EARLY ON MONDAY WHERE A FEW INCHES OF ACCUMULATION IS POSSIBLE.
THE LOW WILL THEN BRING GUSTY WINDS AND SCATTERED SHOWERS THROUGH
THE CENTRAL GREAT LAKES ON MONDAY. MEANWHILE, THE TRAILING COLD
FRONT WILL SWEEP ACROSS THE OHIO AND TENNESSEE VALLEYS ON MONDAY
WITH THUNDERSTORMS GRADUALLY LOSING INTENSITY. THE FRONT WILL
THEN BRING SCATTERED SHOWERS AND EMBEDDED THUNDERSTORMS MONDAY
NIGHT THROUGH THE NORTHEAST WITH ONLY A SLIGHT CHANCE OF SHOWERS
ON TUESDAY. ACROSS THE DEEP SOUTH, THE CHANCE OF SCATTERED
SHOWERS AND THUNDERSTORMS WILL LINGER INTO TUESDAY AS THE FRONT
GRADUALLY STALLS ACROSS THE REGION.
MEANWHILE, THE NEXT UPPER TROUGH AND ASSOCIATED FRONT WILL BRING A
ROUND OF SCATTERED MOUNTAIN SNOW FOR THE NORTHERN ROCKIES ON
MONDAY. THE MOISTURE IS FORECAST TO SPREAD FARTHER TO THE EAST
ACROSS THE NORTHERN PLAINS WHERE SCATTERED SHOWERS AND EMBEDDED
THUNDERSTORMS CAN BE EXPECTED TO ADVANCE FROM WEST TO EAST INTO
TUESDAY. A LOW PRESSURE SYSTEM IS EXPECTED TO GRADUALLY DEVELOP
OVER THE NORTHERN PLAINS ON TUESDAY BUT IT APPEARS THAT LIMITED
AMOUNTS OF MOISTURE WILL ONLY TRIGGER WIDELY SCATTERED SHOWERS AND
STORMS OVER THE UPPER MIDWEST AHEAD OF A WARM FRONT AND A
TRIPLE-POINT LOW PRESSURE WAVE.
MUCH OF THE THE COUNTRY WILL ENTER A RELATIVELY QUIET WEATHER
PATTERN WITH THE DEPARTURE OF THE LOW PRESSURE SYSTEM OVER THE
GREAT LAKES. THE EASTERN U.S. AND THE SOUTHWEST WILL REMAIN
RATHER WARM FOR APRIL WHILE A WARMING TREND IS FORECAST FOR THE
NORTHERN PLAINS BY MONDAY. MOISTURE FROM THE GULF WILL BEGIN TO
RETURN TO ALLOW INCREASING CHANCE OF SCATTERED SHOWERS AND
EMBEDDED THUNDERSTORMS ACROSS THE WESTERN TO CENTRAL GULF COAST ON
TUESDAY.
KONG
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