Prognostic Meteorological Discussion
Issued by NWS

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4
000
FXUS01 KWBC 300711
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
310 AM EDT TUE MAY 30 2017

VALID 12Z TUE MAY 30 2017 - 12Z THU JUN 01 2017

...SEVERE THUNDERSTORMS AND LOCALLY HEAVY RAIN POSSIBLE TODAY FOR
PORTIONS OF THE MID-ATLANTIC AND NORTHEAST...

...ABOVE AVERAGE TEMPERATURES EXPECTED TO SHIFT EAST FROM THE
PACIFIC NORTHWEST TO THE NORTHERN ROCKIES...

A FRONTAL SYSTEM WILL BRING SCATTERED TO NUMEROUS SHOWERS AND
THUNDERSTORMS TO MUCH OF THE MID-ATLANTIC AND NORTHEAST TODAY.
SOME THUNDERSTORMS COULD BE SEVERE; PLEASE REFER TO PRODUCTS
ISSUED BY THE STORM PREDICTION CENTER FOR FURTHER DETAILS ON THE
SEVERE WEATHER THREAT. LOCALLY HEAVY RAINFALL IS ALSO POSSIBLE.
ANOTHER ROUND OF SCATTERED SHOWERS AND STORMS IS POSSIBLE ON
WEDNESDAY FOR THE SAME AREAS AS A SECONDARY COLD APPROACHES THE
REGION AND AN UPPER-LEVEL DISTURBANCE PASSES OVERHEAD. AS THIS
SECONDARY COLD FRONT PASSES THROUGH WEDNESDAY NIGHT AND THURSDAY
MORNING, HIGH PRESSURE WILL MOVE INTO THE GREAT LAKES AND
NORTHEAST BEHIND IT, USHERING IN A DRIER AND SOMEWHAT COOLER AIR
MASS. FARTHER SOUTH, THE TRAILING END OF THE FRONTAL BOUNDARY WILL
LINGER AS A STATIONARY FRONT FROM TEXAS TO THE SOUTHEAST,
PRODUCING SCATTERED SHOWERS AND THUNDERSTORMS OVER A WIDE AREA
TODAY THROUGH THURSDAY.

THE RIDGE OF HIGH PRESSURE ALOFT THAT HAS RESULTED IN TEMPERATURES
SOARING WELL INTO 90S FOR INTERIOR PORTIONS OF THE PACIFIC
NORTHWEST WILL BEGIN TO MOVE EAST TODAY. TEMPERATURES WILL ONCE
AGAIN RISE INTO 90S ACROSS THE INTERIOR NORTHWEST AND NORTHERN
GREAT BASIN TODAY. THE NORTHWEST WILL COOL BY WEDNESDAY AS AN
UPPER-LEVEL TROUGH BEGINS TO MOVE INTO THE REGION, AND A WEAK COLD
FRONT USHERS IN A COOLER PACIFIC AIR MASS. THE ABOVE AVERAGE
TEMPERATURES WILL SHIFT EAST ON WEDNESDAY ALONG WITH THE
UPPER-LEVEL RIDGE, AND HIGH TEMPERATURES WILL RISE WELL INTO THE
70S AND 80S ACROSS MUCH OF THE NORTHERN ROCKIES, 10 TO 15 DEGREES
ABOVE AVERAGE. SCATTERED SHOWERS AND THUNDERSTORMS WILL BE
POSSIBLE AS WELL FROM THE NORTHWEST TO THE NORTHERN ROCKIES,
ESPECIALLY AHEAD OF THE AFOREMENTIONED COLD FRONT AS IT MOVES
INLAND ON WEDNESDAY AND THURSDAY.

RYAN


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.