Prognostic Meteorological Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6
000
FXUS01 KWBC 272100
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
500 PM EDT WED AUG 27 2014

VALID 00Z THU AUG 28 2014 - 00Z SAT AUG 30 2014

...THE THREAT OF FLASH FLOODING IS EXPECTED TO MOVE FROM THE
NORTH-CENTRAL PLAINS INTO THE UPPER MIDWEST DURING THE NEXT COUPLE
OF DAYS...

IT APPEARS THAT THE MAIN FOCUS OF HEAVY RAIN OVER THE NEXT COUPLE
OF DAYS WILL BE IN THE MID-SECTION OF THE COUNTRY MOVING SLOWLY
INTO THE UPPER MIDWEST.  THIS IS IN RESPONSE TO A FRONTAL SYSTEM
MOVING SLOWLY NORTHWARD ACROSS THE CENTRAL PLAINS AS AN
UPPER-LEVEL TROUGH APPROACHES FROM THE CENTRAL ROCKIES.  THE
UPPER-LEVEL TROUGH WILL ALSO INDUCE THE FORMATION OF SURFACE LOW
PRESSURE CENTERS ALONG THE FRONT, WHERE RAIN IS EXPECTED TO BE
ENHANCED.  A MAIN SURFACE LOW IS FORECAST TO MOVE
EAST-NORTHEASTWARD ACROSS NEBRASKA AND SOUTH DAKOTA TONIGHT INTO
THURSDAY, AND THEN ACROSS THE UPPER MIDWEST ON FRIDAY.  HEAVY
RAINS AND THUNDERSTORMS AHEAD OF THIS LOW COULD LEAD TO FLASH
FLOODING ACROSS THE AFOREMENTIONED AREAS.

OVER THE NORTHEAST AND INTO THE MID-ATLANTIC, MAINLY FINE WEATHER
WITH NEAR NORMAL TO BELOW NORMAL TEMPERATURES CAN BE EXPECTED
BEHIND A COLD FRONT AS HURRICANE CRISTOBAL PASSES SAFELY WELL OFF
THE EAST COAST.  SUMMER HEAT WILL PREVAIL TO THE SOUTH OF THE COLD
FRONT WITH MAINLY DRY CONDITIONS ACROSS MUCH OF THE SOUTH.  THE
ONLY EXCEPTION WILL BE NEAR THE WESTERN GULF COAST WHERE A
TROPICAL LOW IS SLOWLY APPROACHING TEXAS.  SHOWERS AND
THUNDERSTORMS CAN BE EXPECTED IN THE COASTAL AREAS BUT ARE
EXPECTED TO BECOME MORE WIDELY SCATTERED AS THE LOW IS FORECAST TO
WEAKEN AND BECOME MORE DIFFUSED WITH TIME.

IN THE WEST, SHOWERS AND THUNDERSTORMS IN THE CENTRAL/SOUTHERN
ROCKIES SHOULD BECOME MORE ISOLATED WITH TIME AS THE UPPER-LEVEL
TROUGH DEPARTS THE REGION.  A COLD FRONT COMING DOWN FROM CANADA
CAN TRIGGER SOME SHOWERS AND THUNDERSTORMS IN THE NORTHERN ROCKIES
LATE THURSDAY INTO FRIDAY ALONG WITH SUMMER HEAT.  FOR THE
REMAINDER OF THE WEST, WEATHER SHOULD CONTINUE TO BE FINE AND DRY
THROUGH FRIDAY.

KONG


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV
$$





USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.