Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 224, NWS Norman, OK

July 8, 2014Garvin County, McClain County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 8, 2014, 6:29 PM CDT for Garvin County, McClain County, Oklahoma. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 8, 2014, 6:29 PM CDT (23:29 UTC)
Expired: Jul 8, 2014, 7:00 PM CDT
In force: 31 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Garvin County, OK, McClain County, OK

The radar

The Norman radar (KTLX), 54 km from the middle of the area, began a volume at 23:31 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, 11.5 hours before the alert went out and 40 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2376 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 103 m²/s²
0-3 km storm-relative helicity: 207 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 8, 6:18 PM CDT, 11 minutes earlier.

Area forecast discussion, Jul 8, 6:18 PM CDT, 11 minutes before

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Hazardous weather outlook, Jul 8, 11:35 AM CDT, 6 hours 54 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1135 AM CDT TUE JUL 8 2014

OKZ004>048-050>052-TXZ083>090-091645-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
1135 AM CDT TUE JUL 8 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

.THUNDERSTORMS...
A COLD FRONT WILL SLOWLY MOVE SOUTHWARD THROUGH AFTERNOON
HOURS. WITH SUFFICIENT AFTERNOON HEATING AND WEAK CONVERGENCE
ALONG THE FRONT...ISOLATED TO WIDELY SCATTERED THUNDERSTORMS ARE
EXPECTED TO DEVELOP LATE THIS AFTERNOON AFTER 4 PM.  WHILE
WIDESPREAD SEVERE WEATHER IS UNLIKELY...A FEW DAMAGING WIND GUSTS
MAY ACCOMPANY THE STRONGER STORMS THAT DEVELOP AND THE SLOW MOVING
NATURE OF STORMS MAY ALSO LEAD TO LOCALIZED HEAVY RAINFALL. STORMS
MAY BECOME MORE WIDESPREAD LATE TONIGHT...BUT THE SEVERE THREAT
WILL DIMINISH AFTER SUNSET.

.HEAT...
AFTERNOON HIGH TEMPERATURES WILL CLIMB INTO THE UPPER 90S TO LOW
100S ACROSS THE SOUTHERN HALF OF OKLAHOMA AND NORTHERN TEXAS. THIS
COMBINED WITH FAIRLY MUGGY CONDITIONS WILL LEAD TO ANOTHER DAY
OF HEAT INDICES SURPASSING 100 DEGREES AT MANY LOCATIONS. IF
WORKING OR PLAYING OUTDOORS...DRINK PLENTY OF WATER AND TRY TO
TAKE FREQUENT BREAKS IN THE SHADE OR IN AN AIR CONDITIONED
ESTABLISHMENT. MAKE SURE PETS AND LIVESTOCK HAVE ACCESS TO WATER
AS WELL.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY...

.THUNDERSTORMS...
AS A COLD FRONT LINGERS ACROSS THE AREA...SCATTERED STORMS WILL
REMAIN POSSIBLE WEDNESDAY AND THURSDAY. THE FRONT WILL EVENTUALLY
LIFT NORTH OF OKLAHOMA LATE THURSDAY...BRINGING RAIN CHANCES TO AN
END. WIDESPREAD SEVERE WEATHER IS VERY UNLIKELY...BUT STRONGER
STORMS WEDNESDAY AFTERNOON MAY POSE A LOCALIZED DAMAGING WIND
THREAT.

.HEAT...
AS THE FRONT LIFTS NORTH OF THE REGION...HOT WEATHER WILL DEVELOP
FROM THURSDAY THROUGH EARLY NEXT WEEK...WITH HIGHS RANGING FROM
THE MID 90S TO LOW 100S...AND TRIPLE DIGIT HEAT INDICES MOST DAYS.
IF WORKING OR PLAYING OUTDOORS...DRINK PLENTY OF WATER AND TRY TO
TAKE FREQUENT BREAKS IN THE SHADE OR IN AN AIR CONDITIONED
ESTABLISHMENT. MAKE SURE PETS AND LIVESTOCK HAVE ACCESS TO WATER
AS WELL.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

AUSTIN/JP

In the hours before

Special weather statement, Jul 8, 5:34 PM CDT, 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
534 PM CDT TUE JUL 8 2014

OKZ028-029-082300-
MCCLAIN OK-CLEVELAND OK-
534 PM CDT TUE JUL 8 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL MCCLAIN AND
SOUTHEASTERN CLEVELAND COUNTIES UNTIL 600 PM CDT...

AT 531 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR WAYNE...MOVING
NORTHEAST AT 10 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...

LAT...LON 3485 9723 3485 9725 3488 9742 3504 9736
      3499 9714
TIME...MOT...LOC 2231Z 210DEG 8KT 3493 9731

..SPEG.

Special weather statement, Jul 8, 5:47 PM CDT, 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
547 PM CDT TUE JUL 8 2014

OKZ042-082315-
PONTOTOC OK-
547 PM CDT TUE JUL 8 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN PONTOTOC COUNTY
UNTIL 615 PM CDT...

AT 545 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES SOUTHWEST
OF KONAWA...MOVING SOUTHEAST AT 10 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...

LAT...LON 3473 9679 3486 9693 3493 9685 3494 9682
      3493 9680 3490 9680 3490 9676 3486 9673
      3487 9669 3484 9664
TIME...MOT...LOC 2245Z 309DEG 7KT 3488 9685

..SPEG.

Local storm report, Jul 8, 6:05 PM CDT, 24 minutes before

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Special weather statement, Jul 8, 6:16 PM CDT, 13 minutes before

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Local storm report, Jul 8, 6:27 PM CDT, 2 minutes before

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Local storm report, Jul 8, 6:29 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 4:36 PM CDT	Special Weather Statement	OUN	Kiowa	24 min
Jul 8, 5:34 PM CDT	Special Weather Statement	OUN	McClain	26 min
Jul 8, 5:47 PM CDT	Special Weather Statement	OUN	Pontotoc	28 min
Jul 8, 5:55 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	35 min
Jul 8, 6:13 PM CDT	Severe Thunderstorm Warning	OUN	McClain, Pontotoc, Pottawatomie	32 min
Jul 8, 6:16 PM CDT	Special Weather Statement	OUN	Hughes	29 min
Jul 8, 6:48 PM CDT	Areal Flood Advisory	OUN	McClain	117 min
Jul 8, 6:59 PM CDT	Special Weather Statement	OUN	Hughes	31 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2014 Every severe thunderstorm warning in 2014

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.