Snow in July??
This was the scene from Jackson Hole Mountain Resort where more than 1″ of snow fell on Monday. An usually strong area of low pressure (for summer) tracked across the Northern Rockies and brought snow to places that rarely see it before August or September.
(Image courtesy Peter Landman tram operator at Jackson Hole Mountain Resort)
Strong Low Pressure
The image below shows the 700mb weather features. The strong area of low pressure in northern Montana moving into Canada was intense enough to draw down cold enough temperatures in the higher elevations of Idaho, Montana and Wyoming on the western/southwestern side of the low on Monday/Monday Night.
Intense Winds Today
As the strong area of low pressure continues to slide northeast into the Canadian Prairie Provinces, strong winds will continue on it’s southwestern flank. Wind gusts up to 40-60mph+ could cause some damage across parts of the High Plains through PM Tuesday.
High Wind Concerns
High Wind Warnings and Wind Advisories have been posted across a wide area across parts of the High Plains/Midwest through PM Tuesday. Winds could frequently gust to 40-60mph+.
* TIMING…TUESDAY MORNING INTO TUESDAY EVENING.
* WINDS…WEST WINDS WITH GUSTS TO AROUND 60 MPH.
* IMPACTS…TRAVEL MAY BECOME HAZARDOUS.
National Weather Outlook
The loop below shows the strong storm system lifting northeast across the Canadian Prairie Provinces through AM Thursday. The trailing cold front will be responsible for widely scattered showers and storms across parts of the Midwest later today, some of which could be strong to severe.
Severe Threat Tuesday
IN MID/UPPER LEVELS…ANTICYCLONE IS FCST TO REBUILD OVER S-CENTRAL
CONUS…WITH RIDGING WWD ACROSS CA AND NEWD TO HUDSON BAY. W OF
THAT RIDGE…CYCLONE IS EJECTING NEWD FROM NERN MT ACROSS SRN
SK…WITH TROUGH SWWD OVER NRN CA. ASSOCIATED 500-MB LOW SHOULD
CROSS SERN SK BY AROUND 00Z THEN REACH MB/ONT BORDER NEAR END OF
PERIOD. GIVEN POSITIVE TILT AND EXPECTED DEAMPLIFICATION OF
TRAILING TROUGH…BULK OF SUBSTANTIAL HEIGHT FALLS AND DCVA SHOULD
REMAIN EITHER OVER CANADA OR BEHIND U.S. PORTION OF SFC COLD FRONT
DESCRIBED BELOW. FARTHER E…COMPACT CYCLONE — NOW EVIDENT IN
MOISTURE-CHANNEL IMAGERY OVER PARTS OF NRN QUE AND ADJOINING EXTREME
WRN LABRADOR — IS FCST TO DIG SEWD TOWARD ERN NB BY END OF
PERIOD…WITH ASSOCIATED HEIGHT FALLS AND STRENGTHENING NWLYS/NLYS
ALOFT SPREADING OVER PARTS OF MAINE OVERNIGHT.
AT SFC…CYCLONE NOW OVER SERN SK SHOULD BECOME MORE DEEPLY OCCLUDED
AND MORE VERTICALLY STACKED WITH LOW ALOFT. ASSOCIATED SFC COLD
FRONT WAS ANALYZED AT 11Z OVER ERN DAKOTAS..CENTRAL NEB…WRN
KS…AND SERN CO. BY 00Z THIS FRONT SHOULD REACH N-CENTRAL
MN…SERN NEB…CENTRAL KS AND NERN NM. BY 12Z COLD FRONT SHOULD
ADVANCE TO WRN LS…CENTRAL WI…NRN MO…AND NWRN OK…DECELERATING
AND PERHAPS STALLING OVER TX PANHANDLE AND ADJACENT ERN NM. SFC
TROUGH/WIND SHIFT AND WEAK COLD FRONT…ASSOCIATED WITH SERN
CANADIAN PERTURBATION ALOFT…WILL MOVE SEWD ACROSS MAINE TODAY.
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