Prognostic Meteorological Discussion
Issued by NWS

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6

000
FXUS01 KWBC 262019
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
318 PM EST SUN FEB 26 2017

VALID 00Z MON FEB 27 2017 - 00Z WED MAR 01 2017

...MORE SNOW FOR THE WESTERN U.S., AND RAIN AND THUNDERSTORMS
RETURN TO THE GULF COAST AND MUCH OF THE SOUTHEASTERN U.S....

AS A STRONG AREA OF HIGH PRESSURE MOVES EASTWARD AND OFF THE
ATLANTIC COAST MONDAY, EXPECT WARM RETURN FLOW FROM THE GULF OF
MEXICO TO BEGIN ADVECTING MOISTURE ACROSS THE SOUTHERN PLAINS AND
THE DEEP SOUTH. THIS WILL COMBINE WITH A LOW PRESSURE SYSTEM
MOVING ACROSS THE SOUTHERN PLAINS. NUMEROUS SHOWERS AND STORMS ARE
LIKELY TO DEVELOP FROM THE LOWER MISSISSIPPI VALLEY TO THE OHIO
VALLEY AND MID ATLANTIC DURING THE FIRST HALF OF THE WORK WEEK AS
A STRONG WARM FRONT PUSHES ACROSS THESE REGIONS. SOME LOCATIONS
WILL RECEIVE IN EXCESS OF AN INCH OF RAINFALL BY TUESDAY MORNING,
ESPECIALLY FROM SOUTHERN ARKANSAS TO NORTHERN ALABAMA. RAIN AND
SNOW WILL ALSO EXPAND INTO THE GREAT LAKES REGION BY MID WEEK AS
THE MOISTURE SURGE MAKES IT INTO THIS REGION.

ANOTHER LOW PRESSURE SYSTEM, AND ACCOMPANYING UPPER LEVEL
DISTURBANCE, HAVE NOW MADE LANDFALL ALONG THE PACIFIC NORTHWEST
COAST THIS AFTERNOON, AND WILL CONTINUE TO MOVE INLAND, REACHING
THE NORTHERN ROCKIES BY MONDAY AFTERNOON. SEVERAL OTHER WEAKER
DISTURBANCES WILL ALSO MOVE INLAND OVER THE NEXT COUPLE OF DAYS
AND INTERACT WITH THIS LARGER SYSTEM. ASSOCIATED PRECIPITATION
WILL FALL AS SNOW, WITH WIDESPREAD SNOW EXPECTED OVER THE NEXT
COUPLE OF DAYS FROM THE PACIFIC NORTHWEST TO THE NORTHEAST
ROCKIES, AND SOUTHWARD TO THE CENTRAL GREAT BASIN AND CENTRAL
ROCKIES. WINTER WEATHER ADVISORIES ARE CURRENTLY IN EFFECT FOR
PORTIONS OF THIS AREA, WITH UP TO A FOOT OF SNOW POSSIBLE IN THE
HIGHEST ELEVATIONS. SNOW WILL BEGIN TAPERING OFF THROUGH THE DAY
TUESDAY AS HIGH PRESSURE MOVES IN BEHIND THE EXITING SYSTEM.

FINALLY, YET ANOTHER LOW PRESSURE SYSTEM MOVING INLAND ALONG THE
SOUTHERN CALIFORNIA COAST TONIGHT WILL LEAD TO SCATTERED RAIN
SHOWERS THROUGH MONDAY, AND THEN A MIX OF RAIN AND SNOW ACROSS
MUCH OF THE SOUTHWEST U.S. AND SOUTHERN ROCKIES MONDAY THROUGH
TUESDAY AS IT BEGINS TO MERGE WITH THE ABOVE-MENTIONED NORTHERN
SYSTEM. THE HIGHEST TERRAIN CAN EXPECT MODERATE TO HEAVY SNOW.
WINTER STORM WATCHES HAVE BEEN POSTED FOR THE MOUNTAINS IN CENTRAL
ARIZONA, WITH UP TO FOOT OF SNOW EXPECTED ABOVE 6000 FEET FROM
MONDAY THROUGH TUESDAY. WINTER STORM WATCHES ARE ALSO IN EFFECT
FOR PORTIONS OF WESTERN COLORADO, WHERE UP TO A FOOT, AND LOCALLY
HIGHER AMOUNTS OF UP TO TWO FEET, ARE ANTICIPATED.

WIX


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




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