Prognostic Meteorological Discussion
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FXUS01 KWBC 271957
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
356 PM EDT THU APR 27 2017

VALID 00Z FRI APR 28 2017 - 00Z SUN APR 30 2017

...HEAVY RAIN LIKELY FOR PORTIONS OF THE SOUTHERN PLAINS,
LOWER/MIDDLE MISSISSIPPI VALLEY, AND THE SOUTHERN OHIO/TENNESSEE
VALLEYS...

...HEAVY SNOW LIKELY OVER PARTS OF THE NORTHERN/CENTRAL ROCKIES...

A LOW PRESSURE SYSTEM TRACKING THROUGH THE SOUTHERN/CENTRAL
ROCKIES WILL GENERATE SNOW ACROSS PORTIONS OF THE NORTHERN/CENTRAL
ROCKIES...LIKELY PRODUCING HEAVY AMOUNTS OVER THE FAVORED UPSLOPE
REGIONS OF MONTANA, WYOMING AND COLORADO. SHOWERS AND
THUNDERSTORMS WILL DEVELOP ACROSS THE SOUTHERN AND CENTRAL PLAINS
AS THE FRONT PUSHES OUT INTO THE PLAINS/LOWER MISSISSIPPI VALLEY,
LINKING UP WITH ANOTHER BOUNDARY LIFTING THROUGH THE LOWER
MISSISSIPPI VALLEY AND GULF STATES. SHOWERS AND THUNDERSTORMS ARE
ALSO EXPECTED ALONG AND AHEAD OF THE FRONT MOVING THROUGH THE
GREAT LAKES, OHIO VALLEY, THE NORTHEAST AND MID-ATLANTIC COAST
THROUGH LATE FRIDAY AFTERNOON. AS COLD AIR FILTERS INTO THE
NORTHERN STATES, SNOW WILL DEVELOP OVER PARTS OF THE UPPER
MISSISSIPPI VALLEY INTO PARTS OF THE UPPER GREAT LAKES ENDING BY
FRIDAY MORNING.

THE EVENT SETTING UP OVER THE SOUTH-CENTRAL U.S. WILL BE A
SIGNIFICANT RAIN PRODUCER AND WILL LIKELY LEAD TO RAPID RUN OFF
INTO LOCAL STREAMS AND RIVERS. WIDESPREAD FLOODING MAY RESULT FROM
THE FORECAST EXCESSIVE RAINFALL OVER THIS REGION. ELSEWHERE,
ONSHORE FLOW WILL AID IN PRODUCING RAIN AND HIGHER ELEVATION SNOW
OVER PARTS OF THE PACIFIC NORTHWEST ON THURSDAY INTO EARLY FRIDAY
MORNING.


CAMPBELL


GRAPHICS AVAILABLE AT WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_WBG.PHP

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