732
FXUS01 KWBC 301839
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
238 PM EDT TUE JUN 30 2026
VALID 00Z WED JUL 01 2026 - 00Z FRI JUL 03 2026
...DANGEROUS HEAT TO BUILD ACROSS THE CENTRAL AND EASTERN U.S.;
BELOW NORMAL TEMPERATURES FOR THE WEST...
...ISOLATED TO SCATTERED SEVERE WEATHER AND HEAVY RAIN CONTINUE
ACROSS THE CENTRAL U.S. AND NORTHEAST THROUGH FRIDAY...
...CRITICAL FIRE WEATHER CONDITIONS EXPECTED OVER THE FOUR CORNERS
THROUGH TOMORROW...
EAST OF THE ROCKIES, MOST WEATHER HEADLINES WILL BE DOMINATED BY
AN INTENSE HEATWAVE FORECAST TO BUILD OVER THE NEXT FEW DAYS
BENEATH A STRONG UPPER-RIDGE. DAYTIME HIGH TEMPERATURES IN THE
UPPER 90S AND TRIPLE DIGITS (WHICH COULD BREAK NUMEROUS RECORDS
ACROSS THE MIDWEST AND NORTHEAST) COMBINED WITH HIGH HUMIDITY WILL
SUPPORT HEAT INDICES OF 105-115 DEGREES FROM KANSAS CITY TO
BOSTON, WHERE APPROXIMATELY 180 MILLION AMERICANS ARE UNDER AN
EXTREME HEAT WARNING OR HEAT ADVISORY AS WE APPROACH THE 4TH OF
JULY WEEKEND. UNFORTUNATELY, LITTLE OVERNIGHT RELIEF CAN BE
EXPECTED EITHER AS TEMPERATURES AFTER SUNSET ONLY DIP INTO THE
70S, WHICH WILL COMPOUND THE IMPACTS OF THE DAYTIME HEAT. USERS
ARE REMINDED TO LIMIT OUTDOOR ACTIVITY, STAY HYDRATED, AND ENSURE
ACCESS TO COOLING CENTERS. ON THE PERIPHERY OF THE HEAT, REPEATED
SHOWERS AND THUNDERSTORMS WILL CONTINUE ALONG AND AHEAD OF A
NORTHWARD LIFTING FRONT AND SURFACE TROUGH. DAILY CHANCES OF
ISOLATED TO WIDELY SCATTERED SEVERE WEATHER AND HEAVY RAINFALL
WILL ARC FROM THE HIGH PLAINS TO THE UPPER GREAT LAKES OWING TO
THE VERY WARM AND UNSTABLE AIRMASS BEING DRAWN NORTHWARD AROUND
THE UPPER-RIDGE. DAYTIME THUNDERSTORMS WILL ALSO CONTINUE OVER THE
SOUTHEAST, WHICH COULD BE MARGINALLY SEVERE AND PRODUCE ISOLATED
DOWNPOURS.
CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE OVER PORTIONS OF
THE FOUR CORNERS THROUGH TOMORROW AS VERY DRY AND WINDY CONDITIONS
PERSIST IN CONJUNCTION WITH DAILY DRY THUNDERSTORMS. OTHERWISE,
MUCH OF THE NATION WEST OF THE ROCKIES CAN ENJOY SLIGHTLY BELOW
AVERAGE DAYTIME HIGHS THIS WEEK AS COOL UPPER-TROUGHING PERSISTS
FOR THE NEXT FEW DAYS.
ASHERMAN
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