783
FXUS01 KWBC 120737
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
336 AM EDT SAT SEP 12 2026
VALID 12Z SAT SEP 12 2026 - 12Z MON SEP 14 2026
...UNSETTLED WEATHER CONTINUES ACROSS THE CENTRAL AND EASTERN U.S.
AHEAD OF A WELL-DEFINED FRONT...
...DEVELOPING LOW PRESSURE SYSTEM TO PRODUCE WET AND COOL WEATHER
ACROSS THE NORTHWEST AND NORTHERN ROCKIES...
A WELL-DEFINED COLD FRONT EMANATING FROM A DEEP CYCLONE LOCATED
OVER HUDSON BAY IS FORECAST TO MIGRATE ACROSS THE CENTRAL AND
EASTERN U.S. THIS WEEKEND. THE APPROACH OF THIS FEATURE, ALONG
WITH A BROAD WARM FRONT IN THE OHIO VALLEY, IS EXPECTED TO
MAINTAIN SHOWER AND THUNDERSTORM CHANCES ACROSS A BROAD AREA FROM
THE NORTHEAST TO THE PLAINS STATES FOR THE NEXT FEW DAYS. THE
HEAVIEST RAINFALL WITHIN THIS BROAD AREA IS INITIALLY EXPECTED TO
FOCUS OVER PORTIONS OF THE OHIO VALLEY, MID-ATLANTIC, AND
NORTHEAST LATER TODAY THROUGH TOMORROW AS A VERY MOIST AIRMASS
SURGES NORTHWARD WITH THE WARM FRONT. SCATTERED FLASH FLOODING IS
THE MAIN CONCERN IN THIS REGION OWING TO THE COMBINATION OF SLOW
STORM MOTIONS, SATURATED SOIL IN THE REGION, AND URBAN AREAS IN
THE PATH OF THESE STORMS INCLUDING THE I-95 CORRIDOR FROM RICHMOND
TO NEW YORK.
ALONG THE OPPOSITE COAST, A STRONG PACIFIC SYSTEM WILL APPROACH
THE NORTHWEST TONIGHT, LEADING TO BENEFICIAL SOAKING RAINS AND
ANOTHER FRONTAL BOUNDARY OVERTAKING THE REGION TOMORROW. FARTHER
SOUTH, DAILY MONSOON THUNDERSTORMS WILL CONTINUE ACROSS THE
SOUTHERN ROCKIES AND FOUR CORNERS. AS THE PACIFIC SYSTEM EVOLVES,
IT IS EXPECTED TO SPIN UP A LEE-SIDE CYCLONE OVER THE NORTHERN AND
CENTRAL ROCKIES. BY TOMORROW MORNING, A STRONG LOW-LEVEL JET
INTERACTING WITH A NORTHWARD-MOVING FRONT WILL CAUSE THE PLAINS TO
LIGHT UP WITH SHOWERS AND THUNDERSTORMS, INTRODUCING A RISK OF
ISOLATED TO SCATTERED FLASH FLOODING. RAINFALL ASIDE, THE FRONTAL
PASSAGE(S) SHOULD USHER IN PLEASANT DAYTIME TEMPERATURES OVER
PORTIONS OF THE NORTHERN TIER, GREAT BASIN, AND HIGH PLAINS WITH
HIGHS IN THE LOW-MID 60S AND 70S. UNFORTUNATELY, THE FRONT WILL
FAIL TO MAKE IT PAST THE OKLAHOMA PANHANDLE, WHICH MEANS THAT
POTENTIALLY RECORD-BREAKING HEAT WILL CONTINUE FOR THE NEXT FEW
DAYS OVER PORTIONS OF THE SOUTHERN PLAINS AND MID-MISSISSIPPI
VALLEY.
ASHERMAN
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page