835
FXUS01 KWBC 250815
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
415 AM EDT FRI AUG 25 2023
VALID 12Z FRI AUG 25 2023 - 12Z SUN AUG 27 2023
...DANGEROUS HEAT CONTINUES FROM THE MIDWEST TO GULF COAST, WITH
RELIEF FINALLY ON THE WAY FOR SOME BY THIS WEEKEND...
...EXCESSIVE RAINFALL LEADING TO FLASH FLOODING POSSIBLE ACROSS
PORTIONS OF THE CENTRAL HIGH PLAINS TODAY...
A VERY DANGEROUS HEAT WAVE WILL PERSIST FOR JUST ONE MORE DAY
ACROSS THE MIDWEST BEFORE RETREATING INTO THE GULF COAST THIS
WEEKEND. THE UPPER-LEVEL RIDGE, WHICH SUPPORTS THIS ANOMALOUS
WARMTH ACROSS THE MISSISSIPPI VALLEY AND MIDWEST WILL RETRACT
TOWARD THE GREAT PLAINS AND WESTERN U.S. THIS WEEKEND. IN THE
MEANTIME, HIGH TEMPERATURES IN THE UPPER 90S TO 100S WILL TIE OR
BREAK EXISTING RECORDS FROM THE MIDWEST DOWN TO THE GULF COAST
STATES TODAY, WITH THE HIGHEST CONCENTRATION OF RECORD RIVALING
TEMPS OCCURRING OVER THE LOWER MISSISSIPPI VALLEY AND EAST TEXAS
THROUGH THE END OF THE WEEKEND. A COLD FRONT WILL PROVIDE RELIEF
TO MUCH OF THE UPPER MIDWEST TODAY AND SATURDAY TO THE MIDDLE
MISSISSIPPI VALLEY. WIDESPREAD RECORD LOW MINIMUM TEMPERATURES ARE
ALSO EXPECTED FROM THE MIDWEST TO THE GULF COAST DURING THIS
PERIOD DUE IN PART TO INCREASED CLOUD COVER OVERNIGHT FROM THE
AFOREMENTIONED COLD FRONT. DO NOT UNDERESTIMATE THE POTENTIAL FOR
HEAT-RELATED ILLNESS--HAVE A WAY TO BREAK YOUR HEAT EXPOSURE, COOL
DOWN, AND STAY HYDRATED! HEAT BEGINS TO BUILD BACK OVER THE WEST
THIS WEEKEND. EXCESSIVE HEAT WATCHES ARE IN EFFECT OVER PORTIONS
OF THE DESERT SOUTHWEST.
SHORTWAVE ENERGY, ASSOCIATED WITH THE REMNANTS OF HAROLD EMBEDDED
WITHIN THE UPPER RIDGE CENTERED OVER THE SOUTHERN PLAINS, WILL
TRIGGER SCATTERED SHOWER AND THUNDERSTORM ACTIVITY OVER PARTS OF
THE CENTRAL/SOUTHERN ROCKIES AND GREAT PLAINS THIS AFTERNOON AND
EVENING. ANOMALOUS MOISTURE ASSOCIATED WITH THIS SYSTEM WILL
INTERACT WITH A SURFACE COLD FRONT AND MAY GENERATE SOME STORMS
CAPABLE OF PRODUCING 1"/HR RAIN RATES AND 1-2" OF TOTAL RAINFALL
WITH LOCALLY HIGHER AMOUNTS POSSIBLE IN THE FOOTHILLS. A SLIGHT
RISK OF EXCESSIVE RAINFALL LEADING TO FLASH FLOODING IS THEREFORE
IN EFFECT FROM PARTS OF EASTERN COLORADO TO SOUTHEASTERN WYOMING
TO WESTERN NEBRASKA/KANSAS.
ELSEWHERE, SCATTERED TO ISOLATED SHOWERS AND THUNDERSTORMS ARE
POSSIBLE ACROSS THE NORTHEAST TODAY WITH LINGERING CHANCES ON
SATURDAY AS THE COLD FRONT MOVES INTO THE ATLANTIC.
KEBEDE
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