Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 52, NWS Norman, OK

April 27, 20145 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Apr 27, 2014, 5:54 AM CDT for 5 counties in Oklahoma. It was in force for 51 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
Apr 27, 2014, 5:54 AM CDT (10:54 UTC)
Expired
Apr 27, 2014, 6:45 AM CDT
In force
51 min
Issued by
NWS Norman, OK
Area
Storm-based polygon
Hail
1.25 in
Wind
60.0 mph

Counties Canadian County, OK, Grady County, OK, Kingfisher County, OK, Logan County, OK, Oklahoma County, OK

The radar

The Norman radar (KTLX), 50 km from the middle of the area, began a volume at 10:58 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
Apr 27, 5:33 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 10.9 hours before the alert went out and 51 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 2014-04-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1087 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 2014-04-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 129 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
1087 J/kg
Mixed-layer CIN
-181 J/kg
Mixed-layer LCL
1782 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
129 m²/s²
0-3 km storm-relative helicity
235 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.7

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 Apr 27, 3:53 AM CDT, 2 hours 1 minute earlier.

Area forecast discussion, Apr 27, 3:53 AM CDT, 2 hours 1 minute before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
353 AM CDT SUN APR 27 2014

.DISCUSSION...
PRIMARY IMPACTS TODAY WILL BE WILDFIRE DANGER/WINDY CONDITIONS
BEHIND DRYLINE. WE ADDED A FEW COUNTIES OF CENTRAL OKLAHOMA TO THE
WIND ADVISORY...WHERE WINDIEST PART OF THE DAY WILL BE DURING
AFTERNOON HOURS. WITH THE STRONGEST WINDS TO OUR WEST BUT
IMPACTING FAR WESTERN AND SOUTHWEST PARTS OF CWA...AREAS OF
BLOWING DUST THAT WILL REDUCE VISIBILITIES WILL BE ADDED TO
FORECAST. CENTRAL PARTS OF OKLAHOMA COULD STILL SEE SOME BLOWING
DUST...WITH A HAZY/COLORFUL SUNSET LIKELY.

AS FAR AS THUNDERSTORMS...THE OVERALL IDEA OF FINE-SCALE MODELS IS
TO HAVE ISOLATED AND DISORGANIZED DEVELOPMENT NEAR AND AHEAD OF
DRYLINE THROUGH SUNRISE. THEREAFTER...ALL MODELS POINT TO
SCATTERED STORM DEVELOPMENT ALONG AND JUST EAST OF INTERSTATE-35.
TIMING IS SLIGHTLY DIFFERENT AMONG MODELS...BUT GENERALLY THE
DRYLINE AND RISK FOR STORM DEVELOPMENT WILL BE EAST OF OKC METRO
AND INTERSTATE-35 AFTER 10 AM. AS FAR AS SEVERE STORMS...THERE
WILL BE A THREAT FOR HAIL UP TO GOLFBALL SIZE WITH THE STRONGEST
STORMS...AND THOSE WILL BE VERY ISOLATED. GREATER RISK FOR
ORGANIZED STORMS WILL BE WELL EAST OF INTERSTATE-35 EARLY THIS
AFTERNOON.

COOLER TODAY AND MUCH COOLER BY TUESDAY AND WEDNESDAY. THERE IS
THE POSSIBILITY OF PERIODIC ELEVATED SHOWERS ACROSS MAINLY THE
NORTHERN HALF OF OKLAHOMA MONDAY AND TUESDAY AS MID-LEVEL THERMAL
TROUGHS ROTATE AROUND LARGE UPPER LOW. ALTHOUGH WE MAINTAIN
NORTHWESTERLY FLOW TOWARD END OF WEEK...WE SHOULD SEE TEMPERATURES
MODERATE CLOSER TO AVERAGE.

&&

.PRELIMINARY POINT TEMPS/POPS...
OKLAHOMA CITY OK  81  50  75  48 /  40   0  20  10
HOBART OK         81  48  77  46 /  10   0  10  10
WICHITA FALLS TX  84  51  81  49 /  20   0   0  10
GAGE OK           77  46  71  42 /  10  10  20  10
PONCA CITY OK     83  49  74  42 /  40   0  20  10
DURANT OK         85  55  79  51 /  40  10   0  10

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...RED FLAG WARNING FROM 10 AM THIS MORNING TO 10 PM CDT THIS
     EVENING FOR OKZ004>024-033>038-044.

     WIND ADVISORY FROM 10 AM THIS MORNING TO 8 PM CDT THIS EVENING
     FOR OKZ004>030-033>041-044>046-050.

TX...RED FLAG WARNING FROM 10 AM THIS MORNING TO 10 PM CDT THIS
     EVENING FOR TXZ083>090.

     WIND ADVISORY FROM 10 AM THIS MORNING TO 8 PM CDT THIS EVENING
     FOR TXZ083>090.

&&

23/11
Hazardous weather outlook, Apr 27, 5:10 AM CDT, 44 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
510 AM CDT SUN APR 27 2014

OKZ004>048-050>052-TXZ083>090-281030-
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-
510 AM CDT SUN APR 27 2014

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

.DAY ONE...TODAY AND TONIGHT...

.THUNDERSTORMS...
SEVERE THUNDERSTORMS WILL BE POSSIBLE THIS MORNING AND EARLY
AFTERNOON OVER OKLAHOMA AND WESTERN NORTH TEXAS.

SCATTERED STRONG TO SEVERE STORMS WILL OCCUR THIS MORNING ALONG
AND EAST OF A COMBINED DRYLINE AND COLD FRONT. THIS FRONT WILL
MOVE QUICKLY EAST TODAY...FROM WESTERN OKLAHOMA AND WESTERN NORTH
TEXAS EARLY THIS MORNING...TO THE I-35 AREA ABOUT 8 AM...TO ATOKA
AND DURANT AROUND 1 PM. EXPECT HAIL TO THE SIZE OF GOLF BALLS AND
STRONG WINDS WITH THE STRONGEST STORMS. LARGER HAIL AND STRONGER
WINDS MAY OCCUR OVER SOUTHEAST OKLAHOMA EARLY THIS AFTERNOON.
THE RISK OF STORMS WILL END SHORTLY AFTER THE PASSAGE OF THE
FRONT.

.FIRE WEATHER...
STRONG WINDS BEHIND THE FRONT WILL BRING MUCH DRIER AIR INTO THE
REGION TODAY. THESE CONDITIONS WILL ENTER WESTERN OKLAHOMA BY MID-
MORNING...AND SPREAD EAST WITH THE DRYLINE. A RED FLAG WARNING IS
IN EFFECT FROM MID-MORNING THROUGH MID EVENING.

.WINDS...
STRONG WEST TO SOUTHWEST WINDS WILL SPREAD ACROSS THE REGION
TODAY. A WIND ADVISORY IS IN EFFECT FOR MUCH OF OKLAHOMA AND NORTH
TEXAS FROM MID-MORNING THROUGH EARLY THIS EVENING.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...

STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
CENTRAL AND SOUTHEAST OKLAHOMA SHOULD PREPARE FOR SEVERE WEATHER
OPERATIONS THROUGH THIS MORNING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

In the hours before

Special weather statement, Apr 27, 4:58 AM CDT, 56 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
458 AM CDT SUN APR 27 2014

OKZ023-271015-
CADDO OK-
458 AM CDT SUN APR 27 2014

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN CADDO COUNTY UNTIL
515 AM CDT...

AT 454 AM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES SOUTHWEST
OF ANADARKO...MOVING NORTHEAST AT 65 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...

LOCATIONS IMPACTED INCLUDE...
ANADARKO...APACHE...BOONE AND STECKER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3520 9830 3509 9810 3485 9831 3488 9848
TIME...MOT...LOC 0954Z 216DEG 57KT 3498 9829
Special weather statement, Apr 27, 5:18 AM CDT, 36 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
518 AM CDT SUN APR 27 2014

OKZ038-039-044-271045-
COTTON OK-STEPHENS OK-COMANCHE OK-
518 AM CDT SUN APR 27 2014

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL COTTON...
NORTHWESTERN STEPHENS AND EASTERN COMANCHE COUNTIES UNTIL 545 AM
CDT...

AT 516 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR GERONIMO...
MOVING NORTHEAST AT 55 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...

LOCATIONS IMPACTED INCLUDE...
LAWTON...ELGIN...GERONIMO...CENTRAL HIGH AND HULEN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3431 9838 3442 9855 3480 9828 3463 9802
TIME...MOT...LOC 1016Z 216DEG 47KT 3443 9842
Special weather statement, Apr 27, 5:19 AM CDT, 35 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
519 AM CDT SUN APR 27 2014

OKZ023-024-027-271045-
CADDO OK-GRADY OK-CANADIAN OK-
519 AM CDT SUN APR 27 2014

...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL CADDO...NORTHWESTERN
GRADY AND SOUTH CENTRAL CANADIAN COUNTIES UNTIL 545 AM CDT...

AT 516 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR LAKE
CHICKASHA...MOVING NORTHEAST AT 55 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...

LOCATIONS IMPACTED INCLUDE...
ANADARKO...MINCO...UNION CITY...VERDEN...GRACEMONT...POCASSET...LAKE
CHICKASHA AND COGAR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MONITOR THE WEATHER SITUATION CLOSELY AND BE ALERT FOR THREATENING
WEATHER CONDITIONS.

&&

LAT...LON 3500 9815 3510 9833 3548 9806 3532 9779
TIME...MOT...LOC 1016Z 216DEG 47KT 3512 9819
Local storm report, Apr 27, 5:34 AM CDT, 20 minutes before
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Special weather statement, Apr 27, 5:40 AM CDT, 14 minutes before
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Special weather statement, Apr 27, 5:47 AM CDT, 7 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 26, 8:35 PM CDTSpecial Weather StatementOUNHarmon25 min
Apr 26, 8:51 PM CDTSevere Thunderstorm WarningOUNHarmon, Jackson39 min
Apr 26, 9:10 PM CDTSpecial Weather StatementOUNGreer20 min
Apr 26, 9:29 PM CDTSevere Thunderstorm WarningOUNGreer, Jackson, Kiowa46 min
Apr 27, 12:07 AM CDTSpecial Weather StatementOUNGarfield, Kay, Noble23 min
Apr 27, 12:23 AM CDTSpecial Weather StatementOUNRoger Mills37 min
Apr 27, 1:25 AM CDTSpecial Weather StatementOUNWoodward35 min
Apr 27, 2:07 AM CDTSpecial Weather StatementOUNKay, Noble38 min
Apr 27, 2:35 AM CDTSpecial Weather StatementOUNKay25 min
Apr 27, 4:58 AM CDTSpecial Weather StatementOUNCaddo17 min
Apr 27, 5:13 AM CDTSevere Thunderstorm WarningOUNComanche, Jackson, Kiowa, Tillman47 min
Apr 27, 5:18 AM CDTSpecial Weather StatementOUNComanche27 min
Apr 27, 5:19 AM CDTSpecial Weather StatementOUNGrady26 min
Apr 27, 5:38 AM CDTSevere Thunderstorm WarningOUNComanche, Grady52 min
Apr 27, 5:40 AM CDTSpecial Weather StatementOUNGrady20 min
Apr 27, 5:47 AM CDTSpecial Weather StatementOUNLogan13 min
Apr 27, 6:20 AM CDTSevere Thunderstorm WarningOUNCanadian, Kingfisher, Logan, Oklahoma40 min
Apr 27, 6:33 AM CDTSpecial Weather StatementOUNOklahoma27 min
Apr 27, 6:36 AM CDTSevere Thunderstorm WarningOUNGarfield, Logan, Noble, Payne24 min
Apr 27, 6:38 AM CDTSevere Thunderstorm WarningOUNGarfield, Kingfisher, Logan37 min
Apr 27, 6:52 AM CDTSpecial Weather StatementOUNOklahoma23 min
Apr 27, 7:00 AM CDTSpecial Weather StatementOUNOklahoma30 min
Apr 27, 7:08 AM CDTSevere Thunderstorm WarningOUNCanadian, Logan, Oklahoma22 min
Apr 27, 7:10 AM CDTSpecial Weather StatementOUNCarter, Love, Murray50 min
Apr 27, 7:24 AM CDTSevere Thunderstorm WarningOUNLogan, Noble, Payne51 min
Apr 27, 7:29 AM CDTSevere Thunderstorm WarningOUNLincoln, Logan, Oklahoma, Payne46 min
Apr 27, 7:33 AM CDTSpecial Weather StatementOUNOklahoma12 min
Apr 27, 7:39 AM CDTSpecial Weather StatementOUNKay21 min
Apr 27, 7:40 AM CDTSpecial Weather StatementOUNJefferson, Stephens50 min
Apr 27, 7:45 AM CDTSevere Thunderstorm WarningOUNCotton, Jefferson, Stephens45 min
Apr 27, 7:51 AM CDTSpecial Weather StatementOUNOklahoma9 min
Apr 27, 7:58 AM CDTSevere Thunderstorm WarningOUNAtoka, Coal, Johnston, Marshall, Pontotoc47 min
Apr 27, 8:01 AM CDTSevere Thunderstorm WarningOUNLogan, Oklahoma29 min
Apr 27, 8:12 AM CDTSpecial Weather StatementOUNHughes48 min
Apr 27, 8:15 AM CDTSpecial Weather StatementOUNOklahoma15 min
Apr 27, 8:17 AM CDTSpecial Weather StatementOUNLincoln28 min
Apr 27, 8:19 AM CDTSpecial Weather StatementOUNBryan26 min
Apr 27, 8:32 AM CDTSpecial Weather StatementOUNCarter28 min
Apr 27, 8:36 AM CDTSevere Thunderstorm WarningOUNLincoln, Payne39 min
Apr 27, 8:47 AM CDTSevere Thunderstorm WarningOUNBryan, Marshall43 min
Apr 27, 9:04 AM CDTSpecial Weather StatementOUNCarter, Murray, Pontotoc56 min
Apr 27, 9:14 AM CDTSevere Thunderstorm WarningOUNLincoln46 min
Apr 27, 9:28 AM CDTSpecial Weather StatementOUNAtoka32 min
Apr 27, 9:36 AM CDTSevere Thunderstorm WarningOUNAtoka39 min
Apr 27, 9:57 AM CDTSpecial Weather StatementOUNBryan18 min
Apr 27, 10:00 AM CDTSpecial Weather StatementOUNOkfuskee15 min
Apr 27, 2:29 PM CDTBlowing Dust AdvisoryOUNAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 17 more6 hr
Apr 27, 2:37 PM CDTSpecial Weather StatementOUNBryan23 min
Apr 27, 2:53 PM CDTSpecial Weather StatementOUNBryan7 min
Apr 27, 3:01 PM CDTSpecial Weather StatementOUNBryan14 min
Apr 27, 3:15 PM CDTSevere Thunderstorm WarningOUNBryan30 min
Apr 26, 7:07 PM CDTSpecial Weather StatementOUNKnox23 min
Apr 26, 8:19 PM CDTSpecial Weather StatementOUNHardeman26 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2014Every 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.