Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 548, NWS Norman, OK

October 26, 2021Harper County, Woods County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Oct 26, 2021, 8:10 PM CDT for Harper County, Woods County, Oklahoma. It was in force for 16 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Oct 26, 2021, 8:10 PM CDT (01:10 UTC)
Expired
Oct 26, 2021, 8:26 PM CDT
In force
16 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Harper County, OK, Woods County, OK

The radar

The Dodge City radar (KDDC), 113 km from the middle of the area, began a volume at 01:12 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Oct 26, 6:17 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.2 hours before the alert went out and 258 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 2021-10-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 791 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2021-10-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 277 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
791 J/kg
Mixed-layer CIN
-225 J/kg
Mixed-layer LCL
916 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
277 m²/s²
0-3 km storm-relative helicity
380 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.5

Open this sounding in Storm Lab

The text

As transmitted.

695 
WUUS54 KOUN 270110
SVROUN
OKC059-151-270145-
/O.NEW.KOUN.SV.W.0548.211027T0110Z-211027T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
810 PM CDT Tue Oct 26 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Northwestern Woods County in northwestern Oklahoma...
  Eastern Harper County in northwestern Oklahoma...

* Until 845 PM CDT.

* At 810 PM CDT, a severe thunderstorm was located 4 miles south of
  Selman, moving north at 60 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Selman.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Tornado Watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3664 9948 3672 9964 3700 9953 3700 9931
      3699 9931
TIME...MOT...LOC 0110Z 201DEG 52KT 3674 9951 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

JT
1 follow-up statement
576 
WWUS54 KOUN 270126
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
826 PM CDT Tue Oct 26 2021

OKC059-151-270136-
/O.CAN.KOUN.SV.W.0548.000000T0000Z-211027T0145Z/
Woods OK-Harper OK-
826 PM CDT Tue Oct 26 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WOODS AND EASTERN
HARPER COUNTIES IS CANCELLED...
                 
The storm which prompted the warning has weakened below severe
limits, therefore the warning has been cancelled.

LAT...LON 3664 9948 3672 9964 3700 9953 3700 9931
      3699 9931
TIME...MOT...LOC 0126Z 201DEG 52KT 3696 9940 

$$

JT

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 26, 7:01 PM CDTSevere Thunderstorm WarningOUNEllis, Harper, Woods, Woodward18 min
Oct 26, 7:06 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills39 min
Oct 26, 7:22 PM CDTSpecial Weather StatementOUNEllis38 min
Oct 26, 7:42 PM CDTSevere Thunderstorm WarningOUNBeckham, Roger Mills48 min
Oct 26, 7:55 PM CDTTornado WarningOUNBeckham, Roger Mills35 min
Oct 26, 7:57 PM CDTSpecial Weather StatementOUNWoodward33 min
Oct 26, 8:05 PM CDTSevere Thunderstorm WarningOUNDewey, Ellis, Roger Mills, Woodward40 min
Oct 26, 8:07 PM CDTSevere Thunderstorm WarningOUNHarper, Woods, Woodward38 min
Oct 26, 8:41 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNCuster, Dewey, Ellis, Harper, Major, Roger Mills and 2 more49 min
Oct 26, 9:10 PM CDTSevere Thunderstorm Warning Destructive damage threatOUNJackson, Tillman65 min
Oct 26, 9:22 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNHarmon, Jackson, Tillman38 min
Oct 26, 9:31 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNAlfalfa, Dewey, Major, Woods, Woodward44 min
Oct 26, 9:59 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNComanche, Greer, Jackson, Kiowa, Tillman46 min
Oct 26, 10:11 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods22 min
Oct 26, 10:12 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Tillman33 min
Oct 26, 10:38 PM CDTSpecial Weather StatementOUNWoods37 min
Oct 26, 10:42 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Cotton, Kiowa, Tillman, Washita63 min
Oct 26, 10:43 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Woods35 min
Oct 26, 11:08 PM CDTSpecial Weather StatementOUNAlfalfa37 min
Oct 26, 11:22 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNCaddo, Canadian, Comanche, Garvin, Grady, McClain and 1 more38 min
Oct 26, 11:36 PM CDTSpecial Weather StatementOUNBlaine, Kingfisher24 min
Oct 26, 11:52 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNBlaine, Canadian, Cleveland, Garvin, Grady, Kingfisher and 3 more53 min
Oct 26, 11:53 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant, Major52 min
Oct 27, 12:11 AM CDTSpecial Weather StatementOUNGarfield34 min
Oct 27, 12:36 AM CDTTornado WarningOUNCleveland, Lincoln, Oklahoma, Pottawatomie24 min
Oct 27, 12:43 AM CDTSevere Thunderstorm Warning Considerable damage threatOUNCleveland, Garvin, Lincoln, Logan, McClain, Oklahoma and 4 more47 min
Oct 27, 1:27 AM CDTSevere Thunderstorm WarningOUNCoal, Garvin, Hughes, Lincoln, McClain, Payne and 3 more27 min
Oct 27, 2:28 AM CDTWind AdvisoryOUNBeckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more17 hr
Oct 27, 1:38 PM CDTWind AdvisoryOUNAlfalfa, Atoka, Beckham, Blaine, Bryan, Caddo and 42 more31 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2021Every severe thunderstorm 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.