869
FXUS01 KWBC 050807
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT WED JUL 05 2023
VALID 12Z WED JUL 05 2023 - 12Z FRI JUL 07 2023
...HEAT REACHES ITS PEAK INTENSITY OVER PORTIONS OF THE PACIFIC
NORTHWEST TODAY AS ; CRITICAL FIRE RISK CONTINUES OVER NORTHERN
ARIZONA...
...MORE STRONG TO SEVERE STORMS LIKELY ACROSS THE CENTRAL PLAINS
THROUGH THE NEXT COUPLE OF DAYS WITH PERIODS OF HEAVY TO EXCESSIVE
RAINFALL POSSIBLY LEADING TO FLASH FLOODING...
A RATHER STRONG INTRUSION OF COOL AIR FROM CANADA FOR THIS TIME OF
THE YEAR CONTINUES TO MAKE ITS WAY SOUTHWARD INTO THE CENTRAL
PLAINS EARLY THIS MORNING. A SQUALL LINE TRIGGERED NEAR/AHEAD OF
A COLD FRONT THAT MARKS THE BOUNDARY OF THE COOL AIR MASS WAS
MOVING ACROSS THE CENTRAL PLAINS WITH HEAVY DOWNPOURS AND SEVERE
THUNDERSTORMS. THIS BOUNDARY IS FORECAST TO GRADUALLY BECOME
NEARLY STATIONARY ACROSS THE SOUTH-CENTRAL U.S. FOR THE NEXT
COUPLE OF DAYS AS ADDITIONAL ORGANIZED CLUSTERS OF STRONG TO
SEVERE THUNDERSTORMS ARE FORECAST TO PERIODICALLY FORM AND MOVE
EAST ACROSS THE CENTRAL PLAINS. HEAVY TO EXCESSIVE RAINFALL CAN
LEAD TO AREAS OF FLASH FLOODING IN ADDITION TO THE INCREASED
THREAT OF SEVERE WEATHER. MEANWHILE, TEMPERATURES BEHIND THE
FRONT ARE FORECAST TO CHALLENGE SOME RECORD COOL DAY-TIME
TEMPERATURES TODAY ACROSS THE NORTH-CENTRAL HIGH PLAINS, FOLLOWED
BY SOME RECORD LOW TEMPERATURES INTO THE MID TO UPPER 40'S OVER
THE CENTRAL PLAINS THURSDAY MORNING. THESE TEMPERATURES WILL ONLY
RECOVER SLIGHTLY ON FRIDAY.
MEANWHILE, THE LATEST HEAT WAVE THAT HAS EXTENDED INTO THE
INTERIOR PORTION OF THE PACIFIC NORTHWEST SHOULD REACH ITS PEAK
INTENSITY TODAY AS ACTUAL HIGH TEMPERATURES ARE FORECAST TO TO TOP
THE LOWER 100'S AT THE HOTTEST LOCATIONS. THE HEAT WILL THEN
GRADUALLY BECOME LESS INTENSE EACH DAY. FARTHER TO THE SOUTH,
DRY, HOT AND WINDY CONDITIONS WILL SUPPORT A CRITICAL FIRE WEATHER
RISK OVER MUCH OF NORTHERN ARIZONA FOR THE NEXT COUPLE OF DAYS.
SEASONAL TO ABOVE-AVERAGE TEMPERATURES WILL CONTINUE ACROSS THE
SOUTHERN PLAINS AND THROUGH MUCH OF THE EASTERN U.S. MORE TYPICAL
SUMMERTIME SCATTERED THUNDERSTORMS ARE EXPECTED TO LINGER ACROSS
THE SOUTHERN TIER STATES. MEANWHILE, SHOWERS AND STORMS
ASSOCIATED WITH A WEAKENING LOW PRESSURE WAVE HAVE LARGELY EXITED
NEW ENGLAND. HOWEVER, THE ASSOCIATED WEAK FRONT IS FORECAST TO
LINGER NEAR THE EASTERN SEABOARD WITH SHOWERS AND STORMS MAINLY
CONFINED ACROSS THE SOUTHERN MID-ATLANTIC TO THE SOUTHEAST.
SHOWERS AND THUNDERSTORMS ARE ALSO EXPECTED TO MOVE ACROSS THE
MIDWEST, GREAT LAKES, AND THE OHIO/TENNESSE VALLEY THROUGH
THURSDAY, BEFORE REACHING INTO THE INTERIOR NORTHEAST BY FRIDAY
MORNING AHEAD OF A WAVY COLD FRONT.
KONG
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