Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 147, NWS Norman, OK

May 3, 2021Garvin County, McClain County, Murray County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 3, 2021, 6:12 PM CDT for Garvin County, McClain County, Murray County, Oklahoma. It was in force for 33 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
May 3, 2021, 6:12 PM CDT (23:12 UTC)
Expired
May 3, 2021, 6:45 PM CDT
In force
33 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

Counties Garvin County, OK, McClain County, OK, Murray County, OK

The radar

The Norman radar (KTLX), 60 km from the middle of the area, began a volume at 23:12 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
May 3, 3:48 PM CDTTornado WatchSPC7 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.2 hours before the alert went out and 54 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 12:00Z on 2021-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 993 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 12:00Z on 2021-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 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
993 J/kg
Mixed-layer CIN
-487 J/kg
Mixed-layer LCL
923 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
18 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

277 
WUUS54 KOUN 032312
SVROUN
OKC049-087-099-032345-
/O.NEW.KOUN.SV.W.0147.210503T2312Z-210503T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
612 PM CDT Mon May 3 2021

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Eastern Garvin County in southern Oklahoma...
  North central Murray County in southern Oklahoma...
  Southeastern McClain County in central Oklahoma...

* Until 645 PM CDT.

* At 612 PM CDT, a severe thunderstorm was located near Wynnewood,
  moving northeast at 30 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Pauls Valley, Wynnewood, Stratford and Byars. 

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 3462 9704 3457 9724 3493 9717 3493 9708
      3492 9707 3492 9705 3491 9702 3492 9698
      3492 9693 3482 9693
TIME...MOT...LOC 2312Z 204DEG 27KT 3464 9714 

HAIL...1.00IN
WIND...<50MPH
 
$$

Mahale
2 follow-up statements
166 
WWUS54 KOUN 032327
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
627 PM CDT Mon May 3 2021

OKC099-032337-
/O.CAN.KOUN.SV.W.0147.000000T0000Z-210503T2345Z/
Murray OK-
627 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL MURRAY COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3473 9698 3468 9722 3493 9717 3493 9708
      3492 9707 3492 9705 3491 9702 3492 9698
      3492 9693 3482 9693
TIME...MOT...LOC 2327Z 203DEG 28KT 3476 9708 

$$

OKC049-087-032345-
/O.CON.KOUN.SV.W.0147.000000T0000Z-210503T2345Z/
Garvin OK-McClain OK-
627 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN GARVIN AND SOUTHEASTERN MCCLAIN COUNTIES...

At 627 PM CDT, a severe thunderstorm was located 7 miles west of
Stratford, moving northeast at 30 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Pauls Valley, Stratford and Byars. 

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 3473 9698 3468 9722 3493 9717 3493 9708
      3492 9707 3492 9705 3491 9702 3492 9698
      3492 9693 3482 9693
TIME...MOT...LOC 2327Z 203DEG 28KT 3476 9708 

HAIL...1.00IN
WIND...<50MPH
 
$$

Mahale
935 
WWUS54 KOUN 032341
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
641 PM CDT Mon May 3 2021

OKC049-087-032351-
/O.EXP.KOUN.SV.W.0147.000000T0000Z-210503T2345Z/
Garvin OK-McClain OK-
641 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GARVIN AND
SOUTHEASTERN MCCLAIN COUNTIES WILL EXPIRE AT 645 PM CDT...
                 
The storm which prompted the warning has weakened below severe
limits, therefore the warning will be allowed to expire.

LAT...LON 3473 9698 3468 9722 3493 9717 3493 9708
      3492 9707 3492 9705 3491 9702 3492 9698
      3492 9693 3482 9693
TIME...MOT...LOC 2341Z 204DEG 27KT 3485 9703 

$$

Mahale

The office that day

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

IssuedProductOfficeCountiesLasted
May 3, 4:56 PM CDTSpecial Weather StatementOUNHarper49 min
May 3, 5:05 PM CDTSpecial Weather StatementOUNCarter25 min
May 3, 5:09 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Love, Murray51 min
May 3, 5:24 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Murray51 min
May 3, 5:49 PM CDTSevere Thunderstorm WarningOUNGarvin, Murray26 min
May 3, 5:50 PM CDTSpecial Weather StatementOUNHarper25 min
May 3, 5:53 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Murray67 min
May 3, 6:00 PM CDTAreal Flood AdvisoryOUNCarter, Garvin, Johnston, Love, Murray, Pontotoc5 hr
May 3, 6:02 PM CDTSevere Thunderstorm WarningOUNJohnston, Murray, Pontotoc58 min
May 3, 6:09 PM CDTSpecial Weather StatementOUNLove36 min
May 3, 6:19 PM CDTSevere Thunderstorm WarningOUNLove26 min
May 3, 6:25 PM CDTSpecial Weather StatementOUNHughes35 min
May 3, 6:33 PM CDTSevere Thunderstorm WarningOUNCoal, Johnston, Pontotoc42 min
May 3, 6:35 PM CDTSevere Thunderstorm WarningOUNCoal, Hughes, Pontotoc40 min
May 3, 6:38 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Murray37 min
May 3, 6:39 PM CDTSpecial Weather StatementOUNJohnston36 min
May 3, 6:44 PM CDTSevere Thunderstorm WarningOUNCarter, Love, Marshall8 min
May 3, 6:50 PM CDTFlash Flood WarningOUNCarter, Murray3 hr
May 3, 6:56 PM CDTSevere Thunderstorm WarningOUNCarter, Johnston, Murray, Pontotoc49 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.