Alert archive / Utah / Winter Storm Warnings in 2009

Winter Storm Warning 11, NWS Salt Lake City, UT

April 14, 2009

NWS Salt Lake City, UT issued this winter storm warning at Apr 14, 2009, 9:44 AM MDT. It was in force for 59 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Apr 14, 2009, 9:44 AM MDT (15:44 UTC)
Expired: Apr 16, 2009, 8:33 PM MDT
In force: 59 hr
Issued by: NWS Salt Lake City, UT

What forecasters said that day

The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Salt Lake City, UT wrote its last area forecast discussion before this winter storm warning went out at Apr 14, 5:42 AM MDT, 4 hours 2 minutes earlier.

Area forecast discussion, Apr 14, 5:42 AM MDT, 4 hours 2 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SALT LAKE CITY UT
542 AM MDT TUE APR 14 2009

.SYNOPSIS...MOISTURE WILL INCREASE ACROSS THE AREA TODAY AHEAD OF
A DEVELOPING COLD UPPER LOW. THIS LOW WILL SLOWLY CROSS THE GREAT
BASIN LATE TODAY THROUGH THURSDAY. HIGH PRESSURE WILL RETURN NEXT
WEEKEND.

&&

.DISCUSSION...A COLD UPPER TROF IS DEEPENING ALONG THE WEST COAST
THIS MORNING WHILE A WEAK SHORT WAVE EJECTS ACROSS THE GREAT BASIN
AHEAD OF IT. THIS WEAK WAVE DOES CARRY CONSIDERABLE MID AND HIGH
LEVEL MOISTURE THAT WILL MIX DOWNWARD THROUGH TODAY. EXPECT
SCATTERED TO NUMEROUS LIGHT SHOWERS ACROSS MAINLY NORTHERN
PORTIONS OF OUR CWA BUT THE BEST LIFT STAYS TO OUR WEST TODAY AND
ANY PRECIP OVER UT WONT AMOUNT TO MUCH. THIS IS COMPOUNDED BY THE
HIGH SNOW LEVELS SO HAVE PUSHED THE WATCH BACK TO NOW START AT 06Z
WED.

WITH THE UPPER LOW NOW FORECAST TO TRACK ACROSS SRN UT...HAVE
ADDED THE SOUTHERN MTS TO THE WATCH. I DONT HAVE A LOT OF
CONFIDENCE THAT WE WILL REACH WARNING AMOUNTS IN ANY 12 OR 24 HR
PERIOD OVER THE NEXT SEVERAL DAYS ALTHO IT IS NOT OUT OF THE
QUESTION.

THE SURFACE LOW WITH THIS FEATURE IS FORECAST TO DEEPEN RAPIDLY
OVER SRN NV TODAY AND THIS PLUS STRONG WINDS ALOFT MIXING DOWN
WILL GENERATE STRONG SURFACE WINDS ACROSS CENTRAL AND SRN UT. HAVE
OPTED TO GO WITH A WIND ADVISORY FOR ALL CENTRAL AND SRN VALLEYS.

SNOW LEVELS ARE STILL FORECAST TO REACH VALLEY FLOORS IN SWRN UT
BUT THE AIRMASS IS NOT FORECAST TO BE QUITE AS COLD ACROSS THE
NORTH SO THE THREAT OF VALLEY ACCUMULATION IS LESS THERE.

WHOLE SYSTEM MOVES EAST BY FRI AND A RIDGE IS FORECAST TO DOMINATE
THE AREA FOR THE WEEKEND.

&&

.AVIATION...VIRGA FLOATING AROUND WITH OCCASIONAL CEILINGS AROUND
8000FT AGL. CEILINGS ARE EXPECTED TO APPROACH 6-7000FT AGL BY MID
MORNING WITH INCREASING SOUTH WINDS. WINDS REACHING AIRPORT WEATHER
WARNING CRITERIA AROUND 15Z AHEAD OF AN APPROACHING COLD FRONT
REMAINS ON TRACK. THERE IS A 30 PERCENT CHANCE THAT A SHALLOW
NORTHWEST WIND SWITCH WILL OCCUR MIDDAY. ANY PRECIPITATION THAT
FALLS TODAY AT THE AIRPORT WILL BE IN THE FORM OF RAIN.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...WIND ADVISORY FROM 11 AM TUESDAY TO 7 PM TUESDAY FOR UTZ013-
     UTZ014-UTZ015-UTZ016-UTZ019-UTZ020-UTZ021.

     WINTER STORM WATCH FROM MIDNIGHT WEDNESDAY TO MIDNIGHT FRIDAY
     FOR UTZ007-UTZ008-UTZ009-UTZ010-UTZ517-UTZ518.

WY...NONE.

&&

WILENSKY/YOUNG

FOR MORE INFORMATION FROM NOAA/S NATIONAL WEATHER SERVICE VISIT...
HTTP://WEATHER.GOV/SALTLAKECITY (ALL LOWER CASE)

Hazardous weather outlook, Apr 14, 6:21 AM MDT, 3 hours 23 minutes before

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The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 14, 4:40 AM MDT	Wind Advisory	SLC		37 hr
Apr 14, 9:44 AM MDT	Winter Weather Advisory	SLC		59 hr

Nearby

Winter Storm Warnings in Utah, 2009 Every winter storm warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.