Alert archive / Wyoming / High Wind Watches in 2019

High Wind Watch 27, NWS Cheyenne, WY

October 30, 2019Albany County, Laramie County, Platte County, Wyoming

NWS Cheyenne, WY issued this high wind watch at Oct 30, 2019, 2:25 AM MDT for Albany County, Laramie County, Platte County, Wyoming. It took effect at Oct 30, 2019, 11:00 PM MDT. It was in force for .

The area

The counties it named.

The facts

Issued
Oct 30, 2019, 2:25 AM MDT (08:25 UTC)
In effect from
Oct 30, 2019, 11:00 PM MDT
Expired
Oct 30, 2019, 2:35 PM MDT
In force
Issued by
NWS Cheyenne, WY

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

The radar

The Cheyenne radar (KCYS), 66 km from the middle of the area, began a volume at 08:24 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

Riverton, WY (KRIW), launched 00:00Z, 8.4 hours before the alert went out and 309 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, Riverton, WY at 00:00Z on 2019-10-30Temperature 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, Riverton, WY at 00:00Z on 2019-10-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -2 square meters per square second.1939Sfc1 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
1340 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
-2 m²/s²
0-3 km storm-relative helicity
-30 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 Oct 29, 11:32 PM MDT, 2 hours 53 minutes earlier.

Area forecast discussion, Oct 29, 11:32 PM MDT, 2 hours 53 minutes before
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Hazardous weather outlook, Oct 29, 3:44 PM MDT, 10 hours 41 minutes before
Hazardous Weather Outlook
National Weather Service Cheyenne WY
344 PM MDT Tue Oct 29 2019

WYZ106-110-116-117-302145-
Central Laramie Range and Southwest Platte County-
North Snowy Range Foothills-South Laramie Range-
South Laramie Range Foothills-
344 PM MDT Tue Oct 29 2019

This hazardous weather outlook is for portions of south central
Wyoming and southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Periods of snow and blowing snow will continue to result in
hazardous travel conditions through early this evening.

Very cold wind chills are expected overnight through early
Wednesday. Limit outdoor exposure and dress appropriately for cold
temperatures.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Dangerous wind chills are possible once again on Wednesday night.

Strong winds are possible in the southeast Wyoming wind corridors
on Thursday. Some blowing snow and drifting snow may occur. Be
prepared for travel impacts.

.Spotter information statement...

Spotter activation will not be needed.

NEZ019>021-054-055-096-WYZ103>105-107>109-111>115-118-119-302145-
Scotts Bluff-Banner-Morrill-Kimball-Cheyenne-South Sioux-
North Laramie Range-Ferris/Seminoe/Shirley Mountains-
Shirley Basin-East Platte County-Goshen County-
Central Carbon County-Southwest Carbon County-Sierra Madre Range-
Upper North Platte River Basin-Snowy Range-Laramie Valley-
Central Laramie County-East Laramie County-
344 PM MDT Tue Oct 29 2019

This hazardous weather outlook is for portions of western
Nebraska...south central Wyoming and southeast Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Periods of snow and blowing snow will continue to result in
hazardous travel conditions through early this evening.

Very cold wind chills are expected overnight through early
Wednesday. Limit outdoor exposure and dress appropriately for cold
temperatures.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Dangerous wind chills are possible once again on Wednesday night.

.Spotter information statement...

Spotter activation will not be needed.

WYZ101-302145-
Converse County Lower Elevations-
344 PM MDT Tue Oct 29 2019

This hazardous weather outlook is for portions of east central
Wyoming.

.DAY ONE...THIS AFTERNOON AND TONIGHT

Very cold wind chills are expected overnight through early
Wednesday. A Wind Chill Advisory has been issued. Limit outdoor
exposure and dress appropriately for cold temperatures.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

Dangerous wind chills are possible once again on Wednesday night.

.Spotter information statement...

Spotter activation will not be needed.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 29, 8:47 PM MDTWind Chill WarningCYSAlbany, Carbon, Laramie13 hr
Oct 30, 2:35 PM MDTHigh Wind WarningCYSAlbany, Carbon, Laramie, Platte24 hr
Oct 30, 2:35 PM MDTWind Chill AdvisoryCYSAlbany, Carbon15 hr
Oct 30, 2:35 PM MDTWinter Weather AdvisoryCYSAlbany, Carbon, Laramie8 hr

Nearby

High Wind Watches in Wyoming, 2019Every high wind watch in 2019

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.