615
FXUS01 KWBC 021952
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
350 PM EDT WED AUG 02 2023
VALID 00Z THU AUG 03 2023 - 00Z SAT AUG 05 2023
...HEAVY RAIN AND FLASH FLOODING POSSIBLE THURSDAY OVER THE
TENNESSEE VALLEY, SOUTHERN APPALACHIANS, AND HIGH PLAINS...
...SEVERE THUNDERSTORMS POSSIBLE OVER PARTS OF THE CENTRAL HIGH
PLAINS ON THURSDAY...
...EXCESSIVE HEAT WARNINGS AND HEAT ADVISORIES FOR PARTS OF THE
CENTRAL/SOUTHERN PLAINS AND THE LOWER MISSISSIPPI VALLEY/CENTRAL
GULF COAST...
THE HEAT GOES ON. SKIES WILL BE SUNNY OVER MUCH OF TEXAS,
OKLAHOMA, AND THE LOWER MISSISSIPPI VALLEY FOR THE NEXT COUPLE OF
DAYS AS THE AREA REMAINS UNDER THE CONTROL OF A STRONG UPPER RIDGE
WHICH HAS SPENT MORE THAN ITS FAIR SHARE OF TIME IN RESIDENCE.
RECORD AND NEAR-RECORD HIGHS ARE LIKELY FOR MANY AREAS ON THURSDAY
AND WILL EXPAND WESTWARD ON FRIDAY INTO NEW MEXICO WHERE
TEMPERATURES OVER 100F WILL BE WIDESPREAD. WHEN COMBINED WITH THE
HUMIDITY, HEAT INDEX VALUES OVER 110F WILL POSE A HEALTH RISK. THE
WELL ABOVE NORMAL TEMPERATURES WILL EXTEND NORTHWARD TO THE
CENTRAL PLAINS WITH TEMPERATURES INTO 90S TO LOW 100S WHILE PARTS
OF THE UPPER MIDWEST WILL ALSO SEE ABOVE NORMAL TEMPERATURES INTO
THE UPPER 80S AND LOW 90S. SOME AREAS OF THE COUNTRY WILL SEE
COOLER THAN NORMAL CONDITIONS -- PARS OF THE NORTHER ROCKIES DUE
TO HIGHER RAIN CHANCES AND ALSO IN PARTS OF THE EAST AS CANADIAN
HIGH PRESSURE MOVES THROUGH.
OVERNIGHT LOW TEMPERATURES WILL ALSO BE WELL ABOVE NORMAL,
ESPECIALLY IN URBAN AREAS, NEAR OR ABOVE RECORDS FOR THE DATE.
WITH TEMPERATURES ONLY INTO THE UPPER 70S TO AROUND 80F, THERE
EXISTS LITTLE TIME TO ADEQUATELY COOL DOWN AT NIGHT. BE SURE TO
FOLLOW HEAT SAFETY PRECAUTIONS. VISIT WWW.HEAT.GOV FOR MORE
INFORMATION ON HEAT AND HEALTH.
A FRONTAL BOUNDARY OVER PARTS OF THE PLAINS AND MISSISSIPPI VALLEY
WILL REMAIN A FOCUS FOR THUNDERSTORMS AND LOCALLY HEAVY RAIN THIS
EVENING INTO EARLY THURSDAY. THE THREAT OF EXCESSIVE RAINFALL WILL
BE EXACERBATED BY EARLIER HEAVY RAINFALL LAST NIGHT, AS ADDITIONAL
RAINFALL COULD FALL OVER WET SOILS. THE AREA OF HEAVIER RAINFALL
WILL MOVE SOUTHEASTWARD INTO THE SOUTHERN APPALACHIANS TOMORROW
WHICH WILL ALSO KEEP TEMPERATURES A BIT COOLER THAN NORMAL.
OVER THE ROCKIES AND INTO THE CENTRAL/HIGH PLAINS, MOISTURE
FLOWING AROUND THE STEADFAST HEAT DOME OVER TEXAS WILL YIELD
ADDITIONAL RAINFALL ALONG WITH A CHANCE OF SEVERE THUNDERSTORMS
(PARTICULARLY EASTERN CO INTO WESTERN KS) ON THURSDAY. STRONG
WINDS AND SEVERE GUSTS ARE POSSIBLE IN AND AROUND ANY ORGANIZED
AREAS OF CONVECTION ALONG WITH HAIL. BY FRIDAY, RAINFALL IS AGAIN
FORECAST FOR PARTS OF THE NORTHERN ROCKIES INTO THE NORTHERN HIGH
PLAINS TO THE SOUTH OF A DEVELOPING COLD FONT NEAR THE CANADIAN
BORDER.
FRACASSO
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