Prognostic Meteorological Discussion
Issued by NWS

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000
FXUS01 KWBC 260705
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
305 AM EDT MON JUN 26 2017

VALID 12Z MON JUN 26 2017 - 12Z WED JUN 28 2017

...TEMPERATURES WILL REMAIN ABOVE NORMAL TODAY FOR MUCH OF THE
WEST, BUT A COOLING TREND IS ON THE WAY...

...SEVERE THUNDERSTORMS POSSIBLE ACROSS THE CENTRAL AND NORTHERN
PLAINS ON TUESDAY...

THE UPPER LEVEL RIDGE OF HIGH PRESSURE WHICH HAS BROUGHT EXTREME
HEAT TO MUCH OF THE WESTERN U.S. IN RECENT DAYS WILL FINALLY BEGIN
TO BREAK DOWN OVER THE NEXT COUPLE DAYS, WITH RELIEF IN SIGHT FOR
MANY AREAS. ONE MORE DAY OF HOT TEMPERATURES IS EXPECTED TODAY.
WHILE THE PACIFIC NORTHWEST WILL NOT SEE THE EXTREME HEAT OF
SUNDAY, TEMPERATURES WILL REMAIN ABOVE AVERAGE FOR MANY AREAS.
TEMPERATURES WILL SOAR INTO THE 90S FOR PORTIONS OF THE NORTHERN
INTERMOUNTAIN WEST AND THE VALLEYS OF THE NORTHERN ROCKIES. A COLD
FRONT FORECAST TO MOVE INTO THE NORTHWESTERN U.S. AND NORTHERN
ROCKIES MONDAY NIGHT INTO TUESDAY WILL BRING AN END TO THE HEAT
ALONG WITH SCATTERED SHOWERS AND THUNDERSTORMS. HIGH TEMPERATURES
TUESDAY AND WEDNESDAY WILL BE MUCH CLOSER TO SEASONAL AVERAGE FROM
THE NORTHWEST TO THE NORTHERN ROCKIES. THE SOUTHWEST WILL REMAIN
SLIGHTLY ABOVE AVERAGE, BUT TEMPERATURES ARE NOT EXPECTED TO SOAR
TO THE EXTREME LEVELS SEEN IN RECENT DAYS BY TUESDAY AND WEDNESDAY.

AS THIS FRONTAL SYSTEM MOVES FROM THE ROCKIES TO THE PLAINS,
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP ACROSS THE
CENTRAL AND NORTHERN PLAINS BY TUESDAY AFTERNOON, SOME OF WHICH
COULD BE SEVERE. REFER TO PRODUCTS ISSUED BY THE STORM PREDICTION
CENTER FOR FURTHER DETAILS ON THE SEVERE WEATHER THREAT. FARTHER
EAST, AN UPPER-LEVEL TROUGH WILL KEEP TEMPERATURES GENERALLY NEAR
OR BELOW AVERAGE INTO MIDWEEK FOR THE EASTERN HALF OF THE COUNTRY.
SCATTERED SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE EACH DAY
ALONG THE GULF COAST, PRIMARILY DURING THE AFTERNOON AND EVENING.
AREAS OF SHOWERS AND STORMS WILL ALSO BE POSSIBLE TODAY AND
TUESDAY FROM THE GREAT LAKES TO THE NORTHEAST IN ASSOCIATION WITH
A PASSING UPPER-LEVEL DISTURBANCE.

RYAN


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

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