Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 310, NWS Norman, OK

April 23, 2008Canadian County, Grady County, Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 23, 2008, 6:01 PM CDT for Canadian County, Grady County, Oklahoma County, Oklahoma. It was in force for 44 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
Apr 23, 2008, 6:01 PM CDT (23:01 UTC)
Expired
Apr 23, 2008, 6:45 PM CDT
In force
44 min
Issued by
NWS Norman, OK
Area
Storm-based polygon

Counties Canadian County, OK, Grady County, OK, Oklahoma County, OK

The radar

The Norman radar (KTLX), 39 km from the middle of the area, began a volume at 23:03 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 12:00Z, 11.0 hours before the alert went out and 33 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 2008-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2105 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 2008-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
2105 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
979 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KOUN 232301
SVROUN
OKC017-051-109-232345-
/O.NEW.KOUN.SV.W.0310.080423T2301Z-080423T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORMAN OK
601 PM CDT WED APR 23 2008

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN CANADIAN COUNTY IN CENTRAL OKLAHOMA...
  NORTHEASTERN GRADY COUNTY IN CENTRAL OKLAHOMA...
  SOUTHWESTERN OKLAHOMA COUNTY IN CENTRAL OKLAHOMA...

* UNTIL 645 PM CDT

* AT 601 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR TUTTLE...MOVING NORTH AT 25 MPH. HAIL 
UP   TO THE SIZE OF HALF DOLLARS ARE LIKELY.

* LOCATIONS IN THE WARNING INCLUDE BETHANY...BRIDGE CREEK...
  MUSTANG...TUTTLE...WARR ACRES...WESTERN OKLAHOMA CITY AND YUKON.

THIS INCLUDES INTERSTATE 40 BETWEEN MILE MARKERS 128 AND 145.

TAKE SHELTER FROM THE STORM IN A STURDY BUILDING AND MOVE AWAY FROM
WINDOWS.

LAT...LON 3553 9756 3538 9764 3538 9766 3535 9766
      3534 9768 3532 9767 3520 9774 3522 9789
      3563 9791
TIME...MOT...LOC 2301Z 190DEG 22KT 3528 9779

$$
2 follow-up statements
000 
WWUS54 KOUN 232321
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
621 PM CDT WED APR 23 2008

OKC017-051-109-232345-
/O.CON.KOUN.SV.W.0310.000000T0000Z-080423T2345Z/
CANADIAN OK-OKLAHOMA OK-GRADY OK-
621 PM CDT WED APR 23 2008

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM CDT
FOR NORTHEASTERN GRADY...SOUTHWESTERN OKLAHOMA AND SOUTHEASTERN
CANADIAN COUNTIES...

AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR DETECTED A 
SEVERE THUNDERSTORM BETWEEN TUTTLE AND MUSTANG...MOVING NORTH AT 
20 MPH.

* LOCATIONS IN THE WARNING INCLUDE BETHANY...MUSTANG...WARR ACRES...
  WESTERN OKLAHOMA CITY AND YUKON.

HAIL UP TO THE SIZE OF NICKELS IS LIKELY.

LAT...LON 3553 9756 3538 9764 3538 9766 3535 9766
      3534 9768 3532 9767 3528 9770 3529 9778
      3558 9775
TIME...MOT...LOC 2321Z 199DEG 20KT 3536 9771

$$
000 
WWUS54 KOUN 232340
SVSOUN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
638 PM CDT WED APR 23 2008

OKC017-051-109-232348-
/O.EXP.KOUN.SV.W.0310.000000T0000Z-080423T2345Z/
CANADIAN OK-OKLAHOMA OK-GRADY OK-
638 PM CDT WED APR 23 2008

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN GRADY...
SOUTHWESTERN OKLAHOMA AND SOUTHEASTERN CANADIAN COUNTIES EXPIRES AT
645 PM CDT...

THE STORMS ARE WEAKENING AND THE WARNING WILL BE ALLOWED TO EXPIRE 
AT 645 PM. SMALL HAIL AND VERY HEAVY RAIN WILL STILL BE POSSIBLE 
OVER WESTERN PORTIONS OF OKLAHOMA CITY...MUSTANG...AND YUKON AS THE 
STORMS MOVE NORTH AT 20 MPH.

LAT...LON 3553 9756 3538 9764 3538 9766 3535 9766
      3534 9768 3532 9767 3528 9770 3529 9778
      3558 9775
TIME...MOT...LOC 2338Z 192DEG 19KT 3537 9772

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 23, 7:47 AM CDTSevere Thunderstorm WarningOUNJackson, Kiowa, Tillman43 min
Apr 23, 8:29 AM CDTSevere Thunderstorm WarningOUNKiowa, Washita46 min
Apr 23, 9:14 AM CDTSevere Thunderstorm WarningOUNDewey46 min
Apr 23, 9:28 AM CDTSevere Thunderstorm WarningOUNCaddo, Washita47 min
Apr 23, 10:00 AM CDTSevere Thunderstorm WarningOUNDewey, Major45 min
Apr 23, 10:14 AM CDTSevere Thunderstorm WarningOUNBlaine46 min
Apr 23, 10:40 AM CDTSevere Thunderstorm WarningOUNBlaine, Dewey, Major50 min
Apr 23, 10:47 AM CDTSevere Thunderstorm WarningOUNWoods43 min
Apr 23, 10:59 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Major31 min
Apr 23, 11:17 AM CDTSevere Thunderstorm WarningOUNCaddo, Comanche43 min
Apr 23, 11:29 AM CDTSevere Thunderstorm WarningOUNAlfalfa, Grant, Major61 min
Apr 23, 11:32 AM CDTSevere Thunderstorm WarningOUNGrady43 min
Apr 23, 12:06 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills39 min
Apr 23, 12:36 PM CDTSevere Thunderstorm WarningOUNEllis, Harper39 min
Apr 23, 2:42 PM CDTSevere Thunderstorm WarningOUNEllis, Roger Mills48 min
Apr 23, 5:24 PM CDTSevere Thunderstorm WarningOUNCleveland, McClain51 min
Apr 23, 6:09 PM CDTSevere Thunderstorm WarningOUNCleveland, Pottawatomie51 min
Apr 23, 6:18 PM CDTSevere Thunderstorm WarningOUNGarfield, Kingfisher42 min
Apr 23, 6:55 PM CDTSevere Thunderstorm WarningOUNPottawatomie32 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2008Every severe thunderstorm warning in 2008

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.