Wyoming set for Late Summer Mountain Snowstorm

Wyoming set for Late Summer Mountain Snowstorm

http://wattsupwiththat.com
August 15, 2009

Roger Pielke Sr. passes this on to me with the note:

Hi Anthony, This is quite unusual! Source: NWS, Riverton, WY

URGENT – WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE RIVERTON WY
309 AM MDT SAT AUG 15 2009

…LATE SUMMER SNOWSTORM EXPECTED FOR THE BIG HORN MOUNTAINS
TODAY…

.AN UNSEASONABLY EARLY SNOWSTORM IS EXPECTED TO AFFECT THE BIG
HORN MOUNTAINS ABOVE 9000 FEET TODAY AS A STRONG PACIFIC TROUGH
OF LOW PRESSURE TRACKS EAST ACROSS THE AREA…

WYZ008-009-151800-
/O.NEW.KRIW.WW.Y.0030.090815T1500Z-090816T0000Z/
BIGHORN MOUNTAINS WEST-BIGHORN MOUNTAINS SOUTHEAST-
309 AM MDT SAT AUG 15 2009

…WINTER WEATHER ADVISORY IN EFFECT FROM 9 AM THIS MORNING TO
6 PM MDT THIS EVENING FOR ELEVATIONS ABOVE 9000 FEET…

THE NATIONAL WEATHER SERVICE IN RIVERTON HAS ISSUED A WINTER
WEATHER ADVISORY FOR THE BIG HORN MOUNTAINS ABOVE 9000 FEET WHICH
IS IN EFFECT FROM 9 AM THIS MORNING TO 6 PM MDT THIS EVENING.

RAINFALL ALONG WITH A FEW EMBEDDED THUNDERSTORMS WILL OCCUR THIS
MORNING BEFORE CHANGING OVER TO SNOW ABOVE 9000 FEET BY 9 AM. SNOW
WILL CONTINUE THROUGH THE AFTERNOON ALONG WITH ACCUMULATIONS OF 3
TO 4 INCHES AT 9000 FEET ALONG WITH UP TO 6 TO 7 INCHES AT 10000 FEET.
ISOLATED EMBEDDED THUNDERSTORMS ARE EXPECTED THROUGHOUT THE DAY
WHICH COULD CAUSE LOCALLY HIGHER AMOUNTS OF SNOWFALL.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES WHILE DRIVING OVER GRANITE
AND POWDER RIVER PASSES TODAY…AND USE CAUTION WHILE DRIVING.
CAMPERS AND HIKERS SHOULD PREPARE FOR DRAMATICALLY COLDER AND WET
WEATHER TODAY.

LIPSON

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