Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 508, NWS Norman, OK

October 10, 20215 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Oct 10, 2021, 7:18 PM CDT for 5 counties in Oklahoma. It was in force for 42 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Oct 10, 2021, 7:18 PM CDT (00:18 UTC)
Expired
Oct 10, 2021, 8:00 PM CDT
In force
42 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Garfield County, OK, Kingfisher County, OK, Logan County, OK, Noble County, OK, Payne County, OK

The radar

The Norman radar (KTLX), 85 km from the middle of the area, began a volume at 00:18 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.

What was reported inside it

TimeReportWhereRemark
Oct 10, 7:20 PM CDTTSTM WND DMG1 S Crescent, OKPOWER LINES DAMAGED.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

IssuedProductOfficeLasted
Oct 10, 3:22 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.3 hours before the alert went out and 95 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 2021-10-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1436 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 2021-10-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 square meters per square second.1939587897117136Sfc1 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
1436 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1199 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
255 m²/s²
Significant tornado parameter
1.9
Supercell composite
8.8

Open this sounding in Storm Lab

The text

As transmitted.

664 
WUUS54 KOUN 110018
SVROUN
OKC047-073-083-103-119-110100-
/O.NEW.KOUN.SV.W.0508.211011T0018Z-211011T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
718 PM CDT Sun Oct 10 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  East central Kingfisher County in central Oklahoma...
  Southwestern Noble County in northern Oklahoma...
  Logan County in central Oklahoma...
  Southwestern Payne County in central Oklahoma...
  Southeastern Garfield County in northern Oklahoma...

* Until 800 PM CDT.

* At 718 PM CDT, a severe thunderstorm was located 4 miles west of
  Cimarron City, moving east at 30 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...
  Guthrie, Langston, Crescent, Cashion, Coyle, Cedar Valley,
  Marshall, Mulhall, Cimarron City, Orlando, Meridian, Lovell, Lucien
  and Lake Carl Blackwell.

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 3636 9736 3586 9714 3579 9774 3600 9784
TIME...MOT...LOC 0018Z 251DEG 25KT 3588 9768 

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

$$

Ware

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 10, 7:02 PM CDTSevere Thunderstorm WarningOUNCanadian, Grady43 min
Oct 10, 7:05 PM CDTSevere Thunderstorm WarningOUNJefferson40 min
Oct 10, 7:24 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNCanadian, Cleveland, Grady, McClain, Oklahoma51 min
Oct 10, 7:25 PM CDTFlash Flood WarningOUNCaddo, Canadian, Cleveland, Grady, McClain, Oklahoma107 min
Oct 10, 7:33 PM CDTSevere Thunderstorm WarningOUNCarter, Cotton, Garvin, Jefferson, Stephens42 min
Oct 10, 7:43 PM CDTTornado WarningOUNCleveland, McClain47 min
Oct 10, 7:47 PM CDTSevere Thunderstorm WarningOUNCarter, Jefferson, Love28 min
Oct 10, 8:14 PM CDTSevere Thunderstorm WarningOUNCarter, Garvin, Jefferson, Murray, Stephens46 min
Oct 10, 8:16 PM CDTSevere Thunderstorm Warning Considerable damage threatOUNCleveland, Lincoln, McClain, Oklahoma, Pottawatomie, Seminole59 min
Oct 10, 8:17 PM CDTAreal Flood AdvisoryOUNKay, Noble3 hr
Oct 10, 8:22 PM CDTTornado WarningOUNLincoln, Oklahoma23 min
Oct 10, 8:43 PM CDTTornado WarningOUNLincoln25 min
Oct 10, 8:53 PM CDTSevere Thunderstorm WarningOUNBryan, Carter, Johnston, Love, Marshall52 min
Oct 10, 8:56 PM CDTTornado Warning Tornado observedOUNLincoln, Pottawatomie, Seminole34 min
Oct 10, 8:59 PM CDTSevere Thunderstorm WarningOUNCarter, Coal, Garvin, Johnston, Murray, Pontotoc and 1 more46 min
Oct 10, 9:03 PM CDTAreal Flood AdvisoryOUNCleveland, Lincoln, Oklahoma, Pottawatomie, Seminole3 hr
Oct 10, 9:17 PM CDTSevere Thunderstorm WarningOUNHughes, Lincoln, Payne, Pontotoc, Pottawatomie, Seminole43 min
Oct 10, 9:43 PM CDTSevere Thunderstorm WarningOUNAtoka, Bryan, Coal, Johnston, Marshall47 min
Oct 10, 9:45 PM CDTAreal Flood AdvisoryOUNCleveland, Lincoln, Logan, McClain, Oklahoma, Pottawatomie3 hr
Oct 10, 9:45 PM CDTSevere Thunderstorm WarningOUNCoal, Hughes, Pontotoc, Seminole45 min
Oct 10, 10:20 PM CDTTornado WarningOUNHughes25 min
Oct 10, 10:30 PM CDTSevere Thunderstorm WarningOUNAtoka, Bryan, Coal45 min
Oct 10, 11:02 PM CDTSpecial Weather StatementOUNCaddo28 min
Oct 10, 11:25 PM CDTSpecial Weather StatementOUNGrady35 min
Oct 11, 12:14 AM CDTSpecial Weather StatementOUNCleveland, Logan, Oklahoma31 min

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.