Alert archive / Wyoming / High Wind Watches in 2013

High Wind Watch 14, NWS Cheyenne, WY

April 12, 20134 counties in Wyoming

NWS Cheyenne, WY issued this high wind watch at Apr 12, 2013, 2:37 PM MDT for 4 counties in Wyoming. It took effect at Apr 13, 2013, 12:00 PM MDT. It was in force for .

The area

The counties it named.

The facts

Issued
Apr 12, 2013, 2:37 PM MDT (20:37 UTC)
In effect from
Apr 13, 2013, 12:00 PM MDT
Expired
Apr 13, 2013, 3:15 AM MDT
In force
Issued by
NWS Cheyenne, WY

Counties Albany County, WY, Carbon County, WY, Laramie County, WY, Platte County, WY

The radar

The Cheyenne radar (KCYS), 88 km from the middle of the area, began a volume at 20:40 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Denver, CO (KDNR), launched 12:00Z, 8.6 hours before the alert went out and 283 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Denver, CO at 12:00Z on 2013-04-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Denver, CO at 12:00Z on 2013-04-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1031 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
177 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Cheyenne, WY wrote its last area forecast discussion before this high wind watch went out at Apr 12, 12:22 PM MDT, 2 hours 15 minutes earlier.

Area forecast discussion, Apr 12, 12:22 PM MDT, 2 hours 15 minutes before
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Hazardous weather outlook, Apr 12, 9:12 AM MDT, 5 hours 25 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHEYENNE WY
912 AM MDT FRI APR 12 2013

NEZ002-003-019>021-054-055-095-096-WYZ102-131515-
DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE-
NORTH SIOUX-SOUTH SIOUX-NIOBRARA COUNTY-
912 AM MDT FRI APR 12 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA
PANHANDLE AND EAST CENTRAL WYOMING.

.DAY ONE...TODAY AND TONIGHT

RAIN AND SNOW SHOWERS LOOK LIKELY TODAY...PARTICULARLY FOR THE
SOUTHERN PANHANDLE SOUTH OF A LINE FROM ALLIANCE TO SCOTTSBLUFF.
SIGNIFICANT ACCUMULATIONS ARE NOT EXPECTED...BUT ROADS COULD
BECOME SLICK IN AREAS IF HEAVIER SNOW SHOWERS PASS OVER A
PARTICULAR STRETCH OF ROAD. USE CAUTION IF TRAVELING THIS MORNING
AND AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

WINDY CONDITIONS ARE EXPECTED ACROSS MUCH OF THE AREA SUNDAY.

A SLOW MOVING LOW PRESSURE SYSTEM IS EXPECTED TO AFFECT THE AREA
MONDAY THROUGH WEDNESDAY BRINGING RAIN AND SNOW. SIGNIFICANT
ACCUMULATING SNOWS ARE POSSIBLE ESPECIALLY OVER HIGHER TERRAIN.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

WYZ101-103>119-131515-
CONVERSE COUNTY LOWER ELEVATIONS-NORTH LARAMIE RANGE-
FERRIS/SEMINOE/SHIRLEY MOUNTAINS-SHIRLEY BASIN-
CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY-
EAST PLATTE COUNTY-GOSHEN COUNTY-CENTRAL CARBON COUNTY-
NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY-
SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE-
LARAMIE VALLEY-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS-
CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY-
912 AM MDT FRI APR 12 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING...
SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING.

.DAY ONE...TODAY AND TONIGHT

A FAIRLY STRONG UPPER LEVEL DISTURBANCE WILL MOVE THROUGH
SOUTHEAST WYOMING TODAY...BRINGING WIDESPREAD SNOW SHOWERS. SNOW
SHOWERS COULD BECOME HEAVY AT TIMES LATER THIS MORNING AND PERSIST
THROUGH THE AFTERNOON. AREAS ALONG AND EAST OF THE LARAMIE RANGE
COULD SEE MODERATE TO HEAVY SNOW WITH SIGNIFICANT ACCUMULATIONS. A
SNOW ADVISORY IS IN EFFECT FOR THE INTERSTATE 25 CORRIDOR FROM THE
COLORADO STATE LINE TO DOUGLAS. SNOW WILL SLOWLY EASE TOWARDS LATE
AFTERNOON.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

BREEZY TO WINDY CONDITIONS ARE EXPECTED OVER THE AREA SATURDAY AND
SUNDAY WITH LOCAL GUSTS IN EXCESS OF 50 MPH POSSIBLE.

A SLOW MOVING LOW PRESSURE SYSTEM IS EXPECTED TO AFFECT THE AREA
MONDAY THROUGH WEDNESDAY BRINGING PERIODS OF SNOW. SIGNIFICANT
ACCUMULATING SNOWS ARE POSSIBLE DUE TO THE SLOW MOVEMENT OF THIS
SYSTEM.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. WE WOULD
APPRECIATE ANY REPORTS ON NEW SNOW ACCUMULATIONS THIS AFTERNOON
THOUGH TO HELP US GAGE THE INTENSITY OF THIS SNOW EVENT. PLEASE
PASS YOUR SNOW REPORTS TO THE NATIONAL WEATHER SERVICE IN
CHEYENNE.

&&

THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND
CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT...
HTTP://WEATHER.GOV/CHEYENNE

In the hours before

Local storm report, Apr 12, 10:37 AM MDT, 4 hours before
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Local storm report, Apr 12, 12:16 PM MDT, 2 hours 21 minutes before
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The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 8:28 AM MDTWinter Weather AdvisoryCYSAlbany, Converse, Goshen, Laramie, Platte5 hr

Nearby

High Wind Watches in Wyoming, 2013Every high wind watch in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.