Prognostic Meteorological Discussion
Issued by NWS

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000
FXUS01 KWBC 230612
PMDSPD

SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
212 AM EDT SAT JUL 23 2016

VALID 12Z SAT JUL 23 2016 - 12Z MON JUL 25 2016

...DANGEROUSLY HOT TEMPERATURES EXPECTED ACROSS PORTIONS OF THE
CENTRAL U.S...

...SEVERE THUNDERSTORMS POSSIBLE ACROSS PORTIONS OF THE NORTHERN
PLAINS AND UPPER MIDWEST...

...HEAVY RAIN POSSIBLE ACROSS PORTIONS OF THE MIDWEST...

A LARGE AND EXPANSIVE AREA OF HIGH PRESSURE AT THE MID AND
UPPER-LEVELS OF THE ATMOSPHERE WILL PERSIST ACROSS THE SOUTHERN
HALF OF THE NATION THROUGH THE NEXT COUPLE DAYS AS IT WEAKENS
SLIGHTLY. THIS HIGH PRESSURE WILL RESULT IN AFTERNOON HIGH
TEMPERATURES RANGING FROM 5 TO 15 DEGREES ABOVE AVERAGE ACROSS A
WIDE AREA FROM THE SOUTHWEST ACROSS THE PLAINS TO THE SOUTHEAST
AND MID-ATLANTIC TODAY AND SUNDAY. THE HOTTEST TEMPERATURES FOR
THE CENTRAL AND SOUTHERN PLAINS ARE EXPECTED TODAY BEFORE A COLD
FRONT MOVES INTO THE REGION ON SUNDAY. TEMPERATURES ACROSS THE
CENTRAL AND SOUTHERN PLAINS WILL SURPASS 100 DEGREES FOR MANY
LOCATIONS TODAY, WITH DANGEROUS HEAT INDICES OF 105 TO 115.

A FRONTAL SYSTEM WILL BRING NUMEROUS SHOWERS AND THUNDERSTORMS TO
THE NORTHERN PLAINS AND UPPER MIDWEST TODAY, SOME OF WHICH COULD
PRODUCE SEVERE WEATHER AND FLASH FLOODING. PLEASE REFER TO
PRODUCTS ISSUED BY THE STORM PREDICTION CENTER FOR FURTHER DETAILS
ON THE SEVERE WEATHER THREAT. FARTHER SOUTH, SCATTERED SHOWERS AND
THUNDERSTORMS ARE EXPECTED ALONG THE COLD FRONT FROM THE CENTRAL
ROCKIES INTO THE CENTRAL PLAINS AS THE COLD FRONT MOVES SOUTHEAST
THROUGH SUNDAY. THE NORTHERN PORTION OF THIS FRONTAL SYSTEM WILL
MOVE EAST INTO THE LOWER GREAT LAKES ON SUNDAY, AND INTO THE
NORTHEAST AND MID-ATLANTIC ON MONDAY, BRINGING SHOWERS AND
THUNDERSTORMS.

SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE POSSIBLE TODAY
THROUGH MONDAY ACROSS THE SOUTHEASTERN U.S. AS A WARM, MOIST, AND
UNSTABLE AIR MASS REMAINS IN PLACE. ACROSS THE SOUTHWEST,
SCATTERED AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS, MOST
NUMEROUS AT HIGHER ELEVATIONS, ARE EXPECTED THROUGH MONDAY AS WEAK
MONSOONAL FLOW PERSISTS INTO THE REGION.


RYAN


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