Prognostic Meteorological Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6
000
FXUS01 KWBC 202032
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
332 PM EST SAT JAN 20 2018

VALID 00Z SUN JAN 21 2018 - 00Z TUE JAN 23 2018

...HEAVY SNOW POSSIBLE FROM PARTS OF THE CENTRAL PLAINS TO THE
UPPER MISSISSIPPI VALLEY...

...RAIN/FREEZING RAIN POSSIBLE OVER PARTS OF THE CENTRAL PLAINS TO
THE GREAT LAKES...

...HEAVY SNOW POSSIBLE OVER THE CASCADES...

...HEAVY RAIN POSSIBLE OVER PARTS OF THE PACIFIC NORTHWEST AND
NORTHERN CALIFORNIA...

A STORM OVER THE CENTRAL ROCKIES WILL MOVE EASTWARD TO THE MIDDLE
MISSISSIPPI VALLEY BY MONDAY.  THE SYSTEM WILL PRODUCE SNOW AND
LOWER ELEVATION RAIN OVER PARTS OF THE NORTHERN/CENTRAL ROCKIES
AND PARTS OF THE GREAT BASIN/SOUTHWEST THAT WILL EXPAND EASTWARD
INTO THE SOUTHERN ROCKIES AND PARTS OF THE NORTHERN/CENTRAL PLAINS
BY SUNDAY MORNING.  ON SUNDAY, THE SNOW WILL END OVER PARTS OF THE
NORTHERN ROCKIES AND THE GREAT BASIN/SOUTHWEST.  OVERNIGHT SUNDAY
INTO MONDAY, THE SNOW WILL MOVE INTO PARTS OF THE UPPER
MISSISSIPPI VALLEY/UPPER GREAT LAKES.  ALSO OVERNIGHT SUNDAY INTO
MONDAY, SNOW MAY BE HEAVY AT TIMES OVER PARTS OF THE CENTRAL
PLAINS INTO THE UPPER MISSISSIPPI VALLEY.  IN ADDITION ON SUNDAY,
ALONG THE TRANSITION FROM RAIN TO SNOW OVER THE CENTRAL
PLAINS/MIDDLE MISSISSIPPI VALLEY A BAND OF RAIN/FREEZING RAIN WILL
DEVELOP.  THE RAIN/FREEZING RAIN AREA WILL EXPAND INTO PARTS OF
THE UPPER MISSISSIPPI VALLEY/GREAT LAKES OVERNIGHT SUNDAY INTO
MONDAY, TOO.

MOISTURE FROM THE WESTERN GULF OF MEXICO WILL FLOW NORTHWARD OVER
PARTS OF THE LOWER MISSISSIPPI VALLEY INTO THE TENNESSEE VALLEY
OVERNIGHT SATURDAY INTO SUNDAY.  ON SUNDAY, A MORE INTENSE
MOISTURE PLUME WILL MOVE NORTHWARD OVER THE SOUTHERN PLAINS INTO
THE LOWER/MIDDLE MISSISSIPPI VALLEY AFTERNOON SUNDAY INTO LATE
SUNDAY NIGHT.  BY MONDAY MORNING, THE PLUME OF MOISTURE WILL
EXTEND FROM THE CENTRAL GULF COAST NORTHWARD TO THE WESTERN OHIO
VALLEY.  THE MOISTURE WILL AID IN PRODUCING LIGHT RAIN OVER PARTS
OF THE LOWER MISSISSIPPI VALLEY/WESTERN GULF COAST, SATURDAY
EVENING, THAT WILL EXPAND NORTHWARD OVER THE MIDDLE MISSISSIPPI
VALLEY/OHIO VALLEY BY SUNDAY MORNING.  ON SUNDAY AFTERNOON,
SHOWERS AND THUNDERSTORMS WILL DEVELOP OVER PARTS OF THE SOUTHERN
PLAINS THAT WILL EXPAND NORTHEASTWARD INTO THE LOWER/MIDDLE
MISSISSIPPI VALLEY BY SUNDAY EVENING.  BY MONDAY MORNING, THE
SHOWERS AND THUNDERSTORMS WILL BE CONFINED TO LOWER MISSISSIPPI
VALLEY/TENNESSEE VALLEY.  RAIN WILL ALSO DEVELOP OVER MIDDLE
MISSISSIPPI VALLEY INTO OHIO VALLEY WITH SOME LIGHT RAIN
DEVELOPING OVER PARTS OF THE NORTHERN MID-ATLANTIC OVERNIGHT
SUNDAY INTO MONDAY.

MEANWHILE, UPPER-LEVEL ENERGY OVER THE NORTH PACIFIC WILL MOVE
INLAND OVER THE PACIFIC NORTHWEST TO THE NORTHERN ROCKIES/NORTHERN
HIGH PLAINS BY MONDAY.  THE SYSTEM WILL PRODUCE RAIN AND HIGHER
ELEVATION SNOW OVER THE PACIFIC NORTHWEST AND SNOW OVER THE
NORTHERN ROCKIES OVERNIGHT SATURDAY INTO SUNDAY.  ON SUNDAY, THE
RAIN AND HIGHER ELEVATION SNOW WILL MOVE INTO NORTHERN CALIFORNIA
EXPANDING EASTWARD INTO PARTS OF THE GREAT BASIN/NORTHERN ROCKIES
BY MONDAY.  ELSEWHERE, DEEP LOW PRESSURE OVER EASTERN CANADA WILL
MOVE EASTWARD OVER THE WESTERN ATLANTIC BY LATE SATURDAY NIGHT.
CIRCULATION AROUND THE LOW WILL AID IN PRODUCING LIGHT SNOW OVER
PARTS OF NORTHERN NEW ENGLAND THROUGH SUNDAY MORNING.


ZIEGENFELDER


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




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