639
FXUS01 KWBC 140640
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
239 AM EDT SUN MAY 14 2023
VALID 12Z SUN MAY 14 2023 - 12Z TUE MAY 16 2023
..RECORD BREAKING HEAT IN THE PACIFIC NORTHWEST
...ADDITIONAL HEAVY RAIN AND FLOODING POSSIBLE FOR PARTS OF THE
SOUTHERN PLAINS AND MIDDLE MISSISSIPPI VALLEY...
A QUASI-STATIONARY FRONT DRAPED ACROSS THE SOUTHERN PLAINS AND
MIDDLE MISSISSIPPI VALLEY WILL BE THE FOCUS FOR ADDITIONAL HEAVY
RAINFALL OVER THE NEXT COUPLE OF DAYS. BITS OF UPPER-LEVEL ENERGY
FLOWING ALONG A NORTH-SOUTH AXIS FROM THE GULF INTO THE CENTRAL
PLAINS WILL ENHANCE INSTABILITY AND MOISTURE OVER THE REGION
LEADING TO INCREASED THUNDERSTORM ACTIVITY. SLIGHT RISKS OF
EXCESSIVE RAINFALL LEADING TO FLASH FLOODING ARE IN EFFECT OVER
PARTS OF THE TEXAS GULF COAST OVER THE NEXT COUPLE OF DAYS DUE TO
THE HEAVY RAINFALL POTENTIAL OVER WELL SATURATED SOILS FROM THIS
WEEKEND'S STORMS. ADDITIONAL RAINFALL OF 1-2" ARE POSSIBLE OVER
PORTIONS OF SOUTH TEXAS AND THE MIDDLE MISSISSIPPI VALLEY BY
TUESDAY MORNING. THINGS SHOULD QUIET DOWN ACROSS THE
AFOREMENTIONED AREAS BY MIDWEEK AS THE FRONT SAGS SOUTHWARD INTO
THE GULF.
RECORD BREAKING HEAT WILL IMPACT THE PACIFIC NORTHWEST OVER THE
NEXT COUPLE OF DAYS WHILE WELL BELOW AVERAGE TEMPERATURES IMPACT
THE GREAT PLAINS. HIGH TEMPERATURES WILL BE IN THE UPPER 80S AND
90S, WHILE LOWS WILL BE IN THE UPPER 50S AND 60S ACROSS COASTAL
WASHINGTON AND OREGON TODAY, WHICH MAY TIE OR BREAK EXISTING
RECORDS. THESE TEMPERATURES WILL BE 20-30+ DEGREES ABOVE AVERAGE
FOR THIS TIME OF YEAR. TEMPERATURES WILL REMAIN ABOVE AVERAGE
ACROSS THE DEEP SOUTH, WHILE UPPER TROUGHING WILL BRING COOLER AIR
TO MUCH OF THE NORTHEASTERN QUADRANT OF THE COUNTRY. SHOWERS AND
THUNDERSTORMS MAY DEVELOP IN THE MID-ATLANTIC AND SOUTHEAST COAST
ALONG THE STATIONARY BOUNDARY EXTENDING FROM THE MIDDLE
MISSISSIPPI VALLEY INTO THE ATLANTIC.
KEBEDE
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