Alert archive / Oklahoma / Wind Advisories in 2021

Wind Advisory 10, NWS Norman, OK

April 7, 202127 counties in Oklahoma; Foard County, Hardeman County, Texas

NWS Norman, OK issued this wind advisory at Apr 7, 2021, 12:06 AM CDT for 27 counties in Oklahoma; Foard County, Hardeman County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Apr 7, 2021, 12:06 AM CDT (05:06 UTC)
Expired
Apr 7, 2021, 3:39 AM CDT
In force
4 hr
Issued by
NWS Norman, OK
All 29 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Logan County, OK, Major County, OK, Noble County, OK, Oklahoma County, OK, Payne County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Foard County, TX, Hardeman County, TX

The radar

The Vance AFB radar (KVNX), 122 km from the middle of the area, began a volume at 05:07 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

Norman, OK (KOUN), launched 00:00Z, 5.1 hours before the alert went out and 125 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, Norman, OK at 00:00Z on 2021-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 963 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2021-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 185 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
963 J/kg
Mixed-layer CIN
-169 J/kg
Mixed-layer LCL
1313 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
185 m²/s²
0-3 km storm-relative helicity
261 m²/s²
Significant tornado parameter
0.2
Supercell composite
7.6

Open this sounding in Storm Lab

The text

As transmitted.

896 
WWUS74 KOUN 070506
NPWOUN

URGENT - WEATHER MESSAGE
National Weather Service Norman OK
1206 AM CDT Wed Apr 7 2021

OKZ004>025-027-033>036-TXZ083-084-071100-
/O.NEW.KOUN.WI.Y.0010.210407T0506Z-210407T1100Z/
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Grady-Harmon-Greer-Kiowa-
Jackson-Hardeman-Foard-
Including the cities of Buffalo, Laverne, Alva, Cherokee, Helena,
Carmen, Medford, Pond Creek, Lamont, Wakita, Ponca City, 
Blackwell, Shattuck, Arnett, Gage, Fargo, Woodward, Fairview, 
Enid, Perry, Cheyenne, Hammon, Seiling, Vici, Taloga, Leedey, 
Weatherford, Clinton, Watonga, Geary, Okeene, Kingfisher, 
Hennessey, Okarche, Guthrie, Stillwater, Elk City, Sayre, 
Cordell, Burns Flat, Sentinel, Anadarko, Hinton, Yukon, Concho, 
El Reno, Mustang, Oklahoma City, Chickasha, Tuttle, Hollis, 
Mangum, Granite, Hobart, Snyder, Altus, Quanah, and Crowell
1206 AM CDT Wed Apr 7 2021

...WIND ADVISORY IN EFFECT UNTIL 6 AM CDT EARLY THIS MORNING...

* WHAT...South winds shifting to the north. Gusts over 45 mph

* WHERE...Portions of central, northern, northwest, southwest 
  and western Oklahoma and northern Texas.

* WHEN...Until 6 AM CDT early this morning.

* IMPACTS...Gusty winds could blow around unsecured objects. 
  Tree limbs could be blown down and a few power outages may 
  result.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

Use extra caution when driving, especially if operating a high
profile vehicle. Secure outdoor objects.

&&

$$
1 follow-up statement
553 
WWUS74 KOUN 070839
NPWOUN

URGENT - WEATHER MESSAGE
National Weather Service Norman OK
339 AM CDT Wed Apr 7 2021

OKZ004>025-027-033>036-TXZ083-084-070945-
/O.CAN.KOUN.WI.Y.0010.000000T0000Z-210407T1100Z/
Harper-Woods-Alfalfa-Grant-Kay-Ellis-Woodward-Major-Garfield-
Noble-Roger Mills-Dewey-Custer-Blaine-Kingfisher-Logan-Payne-
Beckham-Washita-Caddo-Canadian-Oklahoma-Grady-Harmon-Greer-Kiowa-
Jackson-Hardeman-Foard-
Including the cities of Buffalo, Laverne, Alva, Cherokee, Helena,
Carmen, Medford, Pond Creek, Lamont, Wakita, Ponca City, 
Blackwell, Shattuck, Arnett, Gage, Fargo, Woodward, Fairview, 
Enid, Perry, Cheyenne, Hammon, Seiling, Vici, Taloga, Leedey, 
Weatherford, Clinton, Watonga, Geary, Okeene, Kingfisher, 
Hennessey, Okarche, Guthrie, Stillwater, Elk City, Sayre, 
Cordell, Burns Flat, Sentinel, Anadarko, Hinton, Yukon, Concho, 
El Reno, Mustang, Oklahoma City, Chickasha, Tuttle, Hollis, 
Mangum, Granite, Hobart, Snyder, Altus, Quanah, and Crowell
339 AM CDT Wed Apr 7 2021

...WIND ADVISORY IS CANCELLED...

Strong gusty winds behind a cold front have weakened some this 
morning. Therefore, the advisory has been cancelled. Wind gusts of
30 to 35 mph will still be possible this morning. 



$$

The office that day

Everything else NWS Norman, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 7, 2:11 AM CDTSpecial Weather StatementOUNKingfisher34 min
Apr 7, 9:55 AM CDTWind AdvisoryOUNBeckham, Custer, Dewey, Ellis, Greer, Harmon and 9 more7 hr

Nearby

Wind Advisories in Oklahoma, 2021Wind Advisories in Texas, 2021Every wind advisory 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.