Prognostic Meteorological Discussion
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000
FXUS01 KWBC 220742
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
242 AM EST SUN JAN 22 2017

VALID 12Z SUN JAN 22 2017 - 12Z TUE JAN 24 2017

...SEVERE THUNDERSTORMS POSSIBLE TODAY WITH EMBEDDED REGIONS OF
MODERATE RISK OVER THE SOUTHEAST...

...HEAVY RAIN POSSIBLE ALONG THE WEST COAST...

...HEAVY SNOW FOR THE SIERRAS...

...HEAVY RAIN OVER PORTIONS OF THE GULF STATES AND THE SOUTHERN
APPALACHIANS...

WIDESPREAD RAIN AND THUNDERSTORMS IS FORECAST FOR MUCH OF COUNTRY
ALONG AND EAST OF THE MISSISSIPPI VALLEY AS TWO SYSTEMS LIFT
THROUGH THE LOWER MISSISSIPPI VALLEY, THE GULF STATES, THE
TENNESSEE VALLEY, THE SOUTHEAST AND MID-ATLANTIC REGION. ANOTHER
SYSTEM LOCATED NORTH OF THE SOUTHERN SYSTEMS WITH TRACK ACROSS THE
GREAT LAKES REGION AND THE OHIO VALLEY. STRONG TO SEVERE
THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE SOUTHEAST TODAY.
THE STORM PREDICTION CENTER HAS HIGHLIGHTED THIS PORTION OF THE
COUNTRY HAVING SLIGHT TO MODERATE RISK FOR SEVERE THUNDERSTORM
DEVELOPMENT. IN ADDITION, HEAVY RAINFALL WILL BE POSSIBLE IN THIS
REGION AND MAY LEAD TO FLASH FLOODING.

A DEEP UPPER-LEVEL LOW WILL CONTINUE TO TRACK TOWARD THE PACIFIC
COAST OVER THE NEXT COUPLE OF DAYS. A PLUME OF MOISTURE STREAMING
INTO SOUTHERN CALIFORNIA WILL PERSIST TODAY AND WANE BY MONDAY.
COASTAL RAIN AND HIGHER ELEVATION SNOW OVER THE PACIFIC NORTHWEST
TO CENTRAL CALIFORNIA IS EXPECTED TO CONTINUE WHILE SPREAD SOUTH
INTO SOUTHERN CALIFORNIA AND FURTHER INTO THE GREAT BASIN AND
ROCKIES. SNOW AND COASTAL RAIN WILL SLOWLY DECREASE ACROSS THE
PACIFIC NORTHWEST BY MONDAY MORNING. RAIN AND SNOW WILL BE HEAVY
AT TIMES OVER CENTRAL/SOUTHERN CALIFORNIA THROUGH MONDAY MORNING -
EXCESSIVE RAINFALL IS EXPECTED THROUGH EARLY TUESDAY FOR THE
CENTRAL AND SOUTHERN CALIFORNIA COAST. FLASH FLOODING MAY OCCUR
DURING THIS TIME.


CAMPBELL


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





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