Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 430, NWS Norman, OK

June 30, 20184 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 30, 2018, 4:10 PM CDT for 4 counties in Oklahoma. It was in force for 50 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
Jun 30, 2018, 4:10 PM CDT (21:10 UTC)
Expired
Jun 30, 2018, 5:00 PM CDT
In force
50 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.0 in
Wind
70.0 mph

Counties Alfalfa County, OK, Blaine County, OK, Major County, OK, Woods County, OK

The watch it was issued in

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

IssuedProductOfficeLasted
Jun 30, 3:50 PM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.2 hours before the alert went out and 142 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 2018-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1104 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 2018-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -8 square meters per square second.1939Sfc1 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
1104 J/kg
Mixed-layer CIN
-172 J/kg
Mixed-layer LCL
1066 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
-8 m²/s²
0-3 km storm-relative helicity
26 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

956 
WUUS54 KOUN 302110
SVROUN
OKC003-011-093-151-302200-
/O.NEW.KOUN.SV.W.0430.180630T2110Z-180630T2200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Norman OK
410 PM CDT SAT JUN 30 2018

The National Weather Service in Norman has issued a

* Severe Thunderstorm Warning for...
  Southeastern Woods County in northwestern Oklahoma...
  Southwestern Alfalfa County in northwestern Oklahoma...
  Northern Blaine County in northwestern Oklahoma...
  Major County in northwestern Oklahoma...

* Until 500 PM CDT.

* At 409 PM CDT, a severe thunderstorm was located near Fairview, 
  moving north at 20 mph. Another line of severe storms was located 
  from near Southard to near Omega, moving north-northeast.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Fairview, Helena, Okeene, Canton, Ringwood, Cleo Springs, Longdale,
  Ames, Meno, Aline, Hitchcock, Canton Lake, Orienta, Isabella,
  Homestead and Southard.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3655 9822 3638 9811 3624 9810 3617 9811
      3616 9821 3575 9821 3603 9862 3616 9864
      3658 9875
TIME...MOT...LOC 2109Z 182DEG 18KT 3627 9854 

HAIL...1.00IN
WIND...70MPH
 
$$

..speg.
1 follow-up statement
688 
WWUS54 KOUN 302147
SVSOUN

Severe Weather Statement
National Weather Service Norman OK
447 PM CDT SAT JUN 30 2018

OKC011-302156-
/O.CAN.KOUN.SV.W.0430.000000T0000Z-180630T2200Z/
Blaine OK-
447 PM CDT SAT JUN 30 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN BLAINE COUNTY IS
CANCELLED...

The storms which prompted the warning have moved into Major County. 
Therefore, the warning has been cancelled for Blaine County.

LAT...LON 3655 9822 3638 9811 3629 9810 3621 9810
      3617 9811 3616 9817 3617 9822 3637 9869
      3658 9875
TIME...MOT...LOC 2146Z 259DEG 26KT 3649 9863 3628 9813 

$$

OKC003-093-151-302200-
/O.CON.KOUN.SV.W.0430.000000T0000Z-180630T2200Z/
Woods OK-Alfalfa OK-Major OK-
447 PM CDT SAT JUN 30 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM CDT
FOR SOUTHEASTERN WOODS...SOUTHWESTERN ALFALFA AND EASTERN MAJOR
COUNTIES...

At 446 PM CDT, severe thunderstorms were located along a line
extending from 9 miles west of Aline to 3 miles northeast of Ames,
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...
Fairview, Helena, Ringwood, Cleo Springs, Ames, Meno, Aline, Orienta
and Isabella.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3655 9822 3638 9811 3629 9810 3621 9810
      3617 9811 3616 9817 3617 9822 3637 9869
      3658 9875
TIME...MOT...LOC 2146Z 259DEG 26KT 3649 9863 3628 9813 

HAIL...1.00IN
WIND...60MPH
 
$$

..speg.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 29, 10:52 PM CDTSpecial Weather StatementOUNBeckham, Ellis, Roger Mills38 min
Jun 29, 11:28 PM CDTSpecial Weather StatementOUNHarmon32 min
Jun 29, 11:30 PM CDTSpecial Weather StatementOUNEllis, Roger Mills45 min
Jun 30, 12:01 AM CDTSpecial Weather StatementOUNBeckham, Greer, Harmon, Jackson44 min
Jun 30, 12:16 AM CDTSpecial Weather StatementOUNEllis, Roger Mills29 min
Jun 30, 1:29 PM CDTSpecial Weather StatementOUNTillman31 min
Jun 30, 1:36 PM CDTSevere Thunderstorm WarningOUNComanche, Cotton, Tillman39 min
Jun 30, 1:54 PM CDTSpecial Weather StatementOUNCaddo, Washita36 min
Jun 30, 2:04 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Cotton, Kiowa, Tillman26 min
Jun 30, 2:30 PM CDTSevere Thunderstorm WarningOUNCaddo, Comanche, Grady, Stephens30 min
Jun 30, 2:37 PM CDTSpecial Weather StatementOUNWashita53 min
Jun 30, 2:52 PM CDTSevere Thunderstorm WarningOUNCaddo, Canadian, Comanche, Grady, McClain, Stephens53 min
Jun 30, 3:28 PM CDTSevere Thunderstorm WarningOUNBlaine, Caddo, Canadian, Kingfisher47 min
Jun 30, 3:40 PM CDTSevere Thunderstorm WarningOUNCaddo, Canadian, Cleveland, Garvin, Grady, McClain and 1 more50 min
Jun 30, 3:51 PM CDTSpecial Weather StatementOUNMajor24 min
Jun 30, 4:00 PM CDTSevere Thunderstorm WarningOUNKingfisher, Logan45 min
Jun 30, 4:07 PM CDTSevere Thunderstorm WarningOUNDewey27 min
Jun 30, 4:27 PM CDTSevere Thunderstorm WarningOUNCleveland, Garvin, Lincoln, Logan, McClain, Oklahoma and 2 more48 min
Jun 30, 4:40 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kingfisher, Noble50 min
Jun 30, 4:52 PM CDTSpecial Weather StatementOUNStephens23 min
Jun 30, 4:54 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Major, Woods66 min
Jun 30, 5:14 PM CDTSevere Thunderstorm WarningOUNCarter, Cleveland, Garvin, McClain, Murray, Pottawatomie and 1 more46 min
Jun 30, 5:17 PM CDTSevere Thunderstorm WarningOUNLincoln, Noble, Payne43 min
Jun 30, 5:25 PM CDTSevere Thunderstorm WarningOUNGrant50 min
Jun 30, 5:46 PM CDTSpecial Weather StatementOUNKay29 min
Jun 30, 6:09 PM CDTSevere Thunderstorm WarningOUNKay51 min
Jun 30, 6:30 PM CDTSpecial Weather StatementOUNSeminole30 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2018Every severe thunderstorm warning in 2018

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.