Alert archive / Wyoming / High Wind Warnings in 2021

High Wind Warning 12, NWS Riverton, WY

April 26, 2021Natrona County, Wyoming

NWS Riverton, WY issued this high wind warning at Apr 26, 2021, 3:23 AM MDT for Natrona County, Wyoming. It took effect at Apr 26, 2021, 9:00 AM MDT. It was in force for 9 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 26, 2021, 3:23 AM MDT (09:23 UTC)
In effect from
Apr 26, 2021, 9:00 AM MDT
Expired
Apr 26, 2021, 5:33 PM MDT
In force
9 hr
Issued by
NWS Riverton, WY

County Natrona County, WY

The radar

The Riverton/Lander radar (KRIW), 137 km from the middle of the area, began a volume at 09:24 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, 9.4 hours before the alert went out and 131 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 2021-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCLLFCEL10008507005003002001001 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 2021-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.1939587897Sfc1 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
2111 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
166 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

961 
WWUS75 KRIW 260923
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
323 AM MDT Mon Apr 26 2021

WYZ020-270000-
/O.NEW.KRIW.HW.W.0012.210426T1500Z-210427T0000Z/
Natrona County Lower Elevations-
Including the city of Casper
323 AM MDT Mon Apr 26 2021

...HIGH WIND WARNING IN EFFECT FROM 9 AM THIS MORNING TO 6 PM MDT
THIS EVENING...

* WHAT...Southwest winds 30 to 40 mph with gusts up to 60 mph 
  expected.

* WHERE...Natrona County Lower Elevations.

* WHEN...From 9 AM this morning to 6 PM MDT this evening.

* IMPACTS...Mainly to transportation. A blow over risk for light 
  and high profile vehicles, including campers and tractor 
  trailers.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution if you must drive. Keep two hands on your steering
wheel in case of a sudden, strong wind gust.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
1 follow-up statement
262 
WWUS75 KRIW 262333
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
533 PM MDT Mon Apr 26 2021

WYZ020-270045-
/O.CAN.KRIW.HW.W.0012.000000T0000Z-210427T0000Z/
Natrona County Lower Elevations-
Including the city of Casper
533 PM MDT Mon Apr 26 2021

...HIGH WIND WARNING IS CANCELLED...

The cold front has moved through the area bringing winds to the
north substantially decreasing the winds thus the high wind 
warning has been canceled.

$$

For more information from the National Weather Service visit
https://weather.gov/riw

Nearby

High Wind Warnings in Wyoming, 2021Every high wind warning in 2021

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.