...HOTTEST WEATHER OF THE SEASON TO AFFECT PARTS OF OREGON AND

WASHINGTON STATE BY SATURDAY...

 

...PERIODS OF THUNDERSTORMS EXPECTED ACROSS THE NORTHERN PLAINS

AND UPPER MIDWEST WITH A COLD FRONT...

 

 

AFTER APPROACHING ALL-TIME RECORD HIGHS IN PARTS OF OKLAHOMA OVER

THE PAST COUPLE OF DAYS, A GRADUAL DECREASE IN THE EXTREME HEAT

OVER THE CENTRAL PLAINS AND NORTHERN TEXAS IS EXPECTED THIS

WEEKEND AS A COLD FRONT APPROACHES THE REGION.  HOWEVER, IT WILL

STILL BE QUITE HOT TO CLOSE OUT THE WEEK WITH HIGHS ABOVE 100

DEGREES THROUGH SATURDAY, AND LOWS STRUGGLING TO FALL BELOW 80

DEGREES.  THEREFORE, HEAT ADVISORIES AND EXCESSIVE HEAT WARNINGS

ARE IN EFFECT FROM CENTRAL MISSOURI TO NORTH CENTRAL TEXAS.

 

A DEEPENING UPPER LEVEL TROUGH CURRENTLY OVER SOUTHWEST CANADA IS

FORECAST TO MOVE SOUTHEASTWARD AND PUSH A SURFACE COLD FRONT AHEAD

OF IT.  NUMEROUS SHOWERS AND THUNDERSTORMS ASSOCIATED WITH THIS

BOUNDARY ARE EXPECTED INTO THE WEEKEND, STARTING IN THE NORTHERN

HIGH PLAINS AND EVENTUALLY INTO THE UPPER MIDWEST AS THE FRONT

MOVES BY.  STRONG AND SEVERE THUNDERSTORMS ARE POSSIBLE OVER THE

EASTERN HALF OF THE DAKOTAS AND MUCH OF MINNESOTA ON FRIDAY AS

INCREASED INSTABILITY INTERACTS WITH THE COLD FRONT.

 

ELSEWHERE, MONSOONAL SHOWERS AND THUNDERSTORMS OVER ARIZONA AND

INTO THE CENTRAL ROCKIES CAN BE EXPECTED THROUGH SATURDAY,

ESPECIALLY OVER THE HIGHER TERRAIN.  OVER THE DEEP SOUTH AND

MID-ATLANTIC, MAINLY AFTERNOON AND EVENING SHOWERS AND STORMS WILL

BE POSSIBLE GIVEN A HOT AND HUMID AIRMASS.  OVER THE PACIFIC

NORTHWEST, THE FIRST HEAT WAVE OF THE SEASON IS EXPECTED FOR

WESTERN OREGON AND SOUTHWEST WASHINGTON THIS WEEKEND AS HIGHS

COULD EASILY REACH THE MIDDLE 90S.

 

FORECASTER HAMRICK

 

 

GRAPHICS AVAILABLE AT www.hpc.ncep.noaa.gov/basicwx/basicwx_wbg.php