998
FXUS01 KWBC 150800
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT TUE SEP 15 2026
VALID 12Z TUE SEP 15 2026 - 12Z THU SEP 17 2026
...WIDESPREAD SHOWERS AND THUNDERSTORMS EXPECTED ACROSS THE
SOUTHERN ROCKIES, PLAINS, AND MISSOURI VALLEY OVER THE NEXT FEW
DAYS...
...DANGEROUS LATE-SUMMER HEAT CONTINUES ACROSS THE SOUTH-CENTRAL
U.S. THROUGH MIDWEEK...
AN ACTIVE PATTERN FOR THUNDERSTORMS AND HEAVY RAINFALL CONTINUES
OVER THE WESTERN AND CENTRAL U.S. AS A SLOW MOVING COLD FRONT
INTERCEPTS A VERY MOIST AND UNSTABLE AIRMASS BEING PULLED TOWARDS
A DEEP CYCLONE IN ONTARIO. SEVERAL ROUNDS OF HEAVY RAINFALL OVER
THE CENTRAL PLAINS AND MISSOURI VALLEY WILL SUPPORT WIDELY
SCATTERED TO NUMEROUS INSTANCES OF FLASH FLOODING THROUGH MIDWEEK,
AND A FLOOD WATCH EXTENDS FROM NORTHEAST KANSAS TO CENTRAL IOWA
WHERE THE HEAVIEST RAINFALL IS EXPECTED. ISOLATED TO SCATTERED
SEVERE WIND GUSTS ARE ALSO POSSIBLE WITH THE MOST INTENSE STORMS
IN THE PLAINS TODAY. ACROSS THE SOUTHWEST AND SOUTHERN ROCKIES, A
SIMILAR STORY OF OVERLAPPING HEAVY RAINFALL COULD UNFOLD OVER THE
NEXT FEW DAYS AS MONSOONAL MOISTURE SURGES NORTHWARD AHEAD OF A
STRONG UPPER-TROUGH. MEANWHILE, A STATIONARY FRONT OVER THE
FLORIDA PENINSULA WILL LEAD TO DAILY DOWNPOURS ACROSS THE SUNSHINE
STATE, ALTHOUGH NO EXCESSIVE RAINFALL IS EXPECTED FROM THIS
ACTIVITY.
THE AFOREMENTIONED FRONT WILL ALSO SUPPORT A PRONOUNCED
TEMPERATURE CONTRAST OVER THE HEARTLAND TODAY, WITH HIGH
TEMPERATURES IN THE LOW 70S AND UPPER 60S EXPECTED BEHIND THE
FRONT IN THE CENTRAL PLAINS AND MIDWEST, COMPARED TO UPPER 90S AND
TRIPLE DIGIT HIGHS AHEAD OF THE FRONT ACROSS THE SOUTHERN PLAINS
AND MID/LOWER MISSISSIPPI VALLEY. UNFORTUNATELY, THE FRONT WILL
QUICKLY WEAKEN AFTER TODAY, WHICH SUGGESTS THE HAZARDOUS HEAT IS
HERE TO STAY THIS WEEK FOR THESE AREAS. HEAT ADVISORIES EXTEND
FROM THE TEXAS COASTLINE TO THE MISSOURI BOOTHEEL THIS MORNING,
WHERE SEVERAL DAILY HIGH TEMPERATURE RECORDS WILL BE CHALLENGED
OVER THE NEXT FEW DAYS WITH THIS HEAT WAVE.
ASHERMAN/MILLER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page