Prognostic Meteorological Discussion
Issued by NWS

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000
FXUS01 KWBC 191936
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
235 PM EST THU JAN 19 2017

VALID 00Z FRI JAN 20 2017 - 00Z SUN JAN 22 2017

...SEVERE THUNDERSTORMS POSSIBLE FOR PORTIONS OF THE GULF COAST
STATES...

...HEAVY SNOW POSSIBLE FOR THE CALIFORNIA MOUNTAINS AS WELL AS THE
MOGOLLON RIM AND PORTIONS OF THE CENTRAL AND SOUTHERN ROCKIES...

SHOWERS AND THUNDERSTORMS ARE EXPECTED TO BE WIDESPREAD TONIGHT IN
ASSOCIATION WITH A WARM FRONT AND AN UPPER-LEVEL DISTURBANCE FROM
PORTIONS OF THE GULF COAST AND SOUTHEAST TO THE OHIO VALLEY AND
PORTIONS OF THE GREAT LAKES. SOME THUNDERSTORMS COULD BE SEVERE
ACROSS PORTIONS OF THE GULF COAST. RAIN WILL SPREAD NORTHEAST ON
FRIDAY ACROSS PORTIONS OF THE MID-ATLANTIC AND LOWER GREAT LAKES.
FARTHER SOUTH ON FRIDAY, ANOTHER ROUND OF SHOWERS AND
THUNDERSTORMS IS EXPECTED TO DEVELOP DURING THE AFTERNOON AND
EVENING ALONG THE GULF COAST, SOME OF WHICH COULD ONCE AGAIN
BECOME SEVERE. PLEASE REFER TO PRODUCTS ISSUED BY THE STORM
PREDICTION CENTER FOR FURTHER DETAILS ON THE SEVERE WEATHER
THREAT. ON SATURDAY, WIDESPREAD SHOWERS AND THUNDERSTORMS ARE ONCE
AGAIN EXPECTED FROM THE GULF COAST AND LOWER MISSISSIPPI VALLEY TO
THE SOUTHEAST ALONG AND AHEAD OF A DEVELOPING WARM FRONT.

A PACIFIC FRONTAL SYSTEM WILL MOVE ONSHORE ALONG THE WEST COAST
TONIGHT, BRINGING WIDESPREAD RAIN AND MOUNTAIN SNOW. AS THE SYSTEM
MOVES INLAND, SNOW WILL SPREAD INTO PORTIONS OF THE GREAT BASIN
AND FOUR CORNERS REGION ON FRIDAY. HEAVY SNOW WILL BE POSSIBLE
THROUGH SATURDAY MORNING FOR THE MOUNTAINS IN CALIFORNIA AS WELL
AS AREAS FROM THE MOGOLLON RIM TO THE CENTRAL AND SOUTHERN
ROCKIES. BY LATE SATURDAY INTO SATURDAY NIGHT, RAIN AND MOUNTAIN
SNOW WILL BEGIN TO INCREASE ONCE AGAIN FROM CENTRAL CALIFORNIA
NORTHWARD ALONG THE COAST AS ANOTHER FRONTAL SYSTEM APPROACHES.


RYAN


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