Alert archive / Wyoming / High Wind Warnings in 2021

High Wind Warning 9, NWS Riverton, WY

March 6, 2021Natrona County, Wyoming

NWS Riverton, WY issued this high wind warning at Mar 6, 2021, 11:32 AM MST for Natrona County, Wyoming. It was in force for 6 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
Mar 6, 2021, 11:32 AM MST (18:32 UTC)
Expired
Mar 6, 2021, 6:00 PM MST
In force
6 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 18:36 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 12:00Z, 6.5 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 12:00Z on 2021-03-06Temperature 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 12:00Z on 2021-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 63 square meters per square second.193958Sfc1 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
3244 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
63 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

882 
WWUS75 KRIW 061832
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
1132 AM MST Sat Mar 6 2021

WYZ020-070100-
/O.NEW.KRIW.HW.W.0009.210306T1832Z-210307T0100Z/
Natrona County Lower Elevations-
Including the city of Casper
1132 AM MST Sat Mar 6 2021

...HIGH WIND WARNING IN EFFECT UNTIL 6 PM MST THIS EVENING...

* WHAT...Southwest winds 30 to 40 mph with gusts 60 to 65 mph.

* WHERE...Natrona County Lower Elevations.

* WHEN...Until 6 PM MST this evening.

* IMPACTS...Travel will be difficult, especially for high profile
  vehicles.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use caution if you must drive. There is an increased risk of blow
over for light and high profile vehicles.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/riw
1 follow-up statement
986 
WWUS75 KRIW 070035
NPWRIW

URGENT - WEATHER MESSAGE
National Weather Service Riverton WY
535 PM MST Sat Mar 6 2021

WYZ020-070145-
/O.EXP.KRIW.HW.W.0009.000000T0000Z-210307T0100Z/
Natrona County Lower Elevations-
Including the city of Casper
535 PM MST Sat Mar 6 2021

...HIGH WIND WARNING WILL EXPIRE AT 6 PM MST THIS EVENING...

Wind have weakened below high wind thresholds, thus the high wind
warning will be allowed to expire at 6 PM.

$$

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.