Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 375, NWS Norman, OK

May 23, 20134 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at May 23, 2013, 5:58 AM CDT for 4 counties in Oklahoma. It was in force for 47 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: May 23, 2013, 5:58 AM CDT (10:58 UTC)
Expired: May 23, 2013, 6:45 AM CDT
In force: 47 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

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

The radar

The Norman radar (KTLX), 34 km from the middle of the area, began a volume at 11:01 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 00:00Z, 11.0 hours before the alert went out and 26 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2107 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 219 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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 May 23, 4:38 AM CDT, 1 hour 20 minutes earlier.

Area forecast discussion, May 23, 4:38 AM CDT, 1 hour 20 minutes before

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Hazardous weather outlook, May 23, 4:55 AM CDT, 1 hour 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
455 AM CDT THU MAY 23 2013

OKZ004>048-050>052-TXZ083>090-241100-
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-
455 AM CDT THU MAY 23 2013

THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.

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

THUNDERSTORM OUTLOOK...
THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
WESTERN OKLAHOMA AND WESTERN NORTH TEXAS LATE THIS AFTERNOON
AND TONIGHT.

A FEW STRONG TO PERHAPS SEVERE THUNDERSTORMS WILL OCCUR THIS
MORNING ACROSS PARTS OF OKLAHOMA.

LOCATION...
THE SLIGHT RISK AREA IS WEST OF A LINE FROM ARNETT TO
WEATHERFORD TO LAWTON TO MARIETTA OKLAHOMA...AND INCLUDES
THE WICHITA FALLS...HOBART...ALTUS...SEYMOUR...AND
VERNON AREAS.

IMPACTS...
THE MAIN HAZARDS LATE THIS AFTERNOON AND TONIGHT WILL BE VERY
LARGE HAIL UP TO THE SIZE OF TENNIS BALLS AND DAMAGING WINDS
UP TO 70 MPH. TORNADOES MAY OCCUR IN THE SLIGHT RISK AREA
AS WELL.

THUNDERSTORMS THIS MORNING OVER CENTRAL...NORTHERN...AND
SOUTHERN OKLAHOMA WILL BE CAPABLE OF PRODUCING HAIL UP TO
THE SIZE OF HALF DOLLARS AND WIND GUSTS UP TO 60 MPH.

TIMING...
IN THE SLIGHT RISK AREA...THE MOST LIKELY TIME FOR
SEVERE STORMS WILL OCCUR BETWEEN 4 PM AND MIDNIGHT CDT.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
THE RISK AREA SHOULD PLAN FOR SEVERE WEATHER OPERATIONS LATE
THIS AFTERNOON AND EVENING.

DISCUSSION...
ELEVATED THUNDERSTORMS WILL CONTINUE TO DEVELOP AND AFFECT
LOCATIONS NORTHEAST OF A WOODWARD TO CHICKASHA TO MADILL
LINE THIS MORNING...PERHAPS INTO EARLY AFTERNOON...AS
A LOW LEVEL JET BRINGS INCREASED MOISTURE AND INSTABILITY
TO THE AREA. A FEW OF THESE STORMS MAY BE STRONG TO PERHAPS
SEVERE WITH HAIL UP TO THE SIZE OF HALF DOLLARS...GUSTY
WINDS...DANGEROUS CLOUD TO GROUND LIGHTNING STRIKES...
AND DOWNPOURS.

THIS AFTERNOON...SEVERE THUNDERSTORMS WILL DEVELOP OVER
THE TEXAS PANHANDLE...THEN MOVE EASTWARD INTO WESTERN
OKLAHOMA AND WESTERN NORTH TEXAS. DISCRETE SUPERCELLS
MAY DEVELOP...CAPABLE OF PRODUCING VERY LARGE HAIL
AND PERHAPS TORNADOES DUE TO THE AIR BEING VERY UNSTABLE
AND SHEARED. STORMS MAY ORGANIZE INTO A SQUALL LINE THIS
EVENING ACROSS SOUTHWESTERN OKLAHOMA AND WESTERN NORTH TEXAS
WITH DAMAGING WINDS AND LARGE HAIL AS THE MAIN HAZARDS.
STORMS ARE GENERALLY EXPECTED TO WEAKEN AFTER MIDNIGHT
WITH A DIMINISHING CHANCE FOR SEVERE WEATHER.

EAST OF THE SLIGHT RISK AREA THIS AFTERNOON AND EVENING...
INCLUDING THE OKLAHOMA CITY METRO...ADA...DURANT...AND
ARDMORE AREAS...SLIGHTLY BETTER CAPPING MAY LIMIT
THUNDERSTORM DEVELOPMENT. HOWEVER...IF THE CAP CAN BE
OVERCOME...ISOLATED SEVERE...PERHAPS VERY SEVERE...STORMS
CAPABLE OF VERY LARGE HAIL...DAMAGING WINDS...AND TORNADOES
WOULD BE POSSIBLE AS THE AIR WILL BE VERY UNSTABLE
AND SHEARED. CONFIDENCE OF SEVERE STORMS IN THESE
AREAS IS LOWER COMPARED TO WESTERN OKLAHOMA AND
WESTERN NORTH TEXAS.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT FRIDAY MAY 24.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...90 PERCENT.

OTHER HAZARDOUS WEATHER...
HEAVY RAINFALL OF 1 TO 3 INCHES MAY CAUSE LOCALIZED
FLOODING...MAINLY LATE THIS AFTERNOON AND TONIGHT.

RIVER FLOODING CONTINUES ALONG THE CLEAR BOGGY CREEK NEAR CANEY
IN ATOKA COUNTY.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

THUNDERSTORM OUTLOOK...
THUNDERSTORM CHANCES WILL CONTINUE ACROSS PARTS OF THE AREA THROUGH
THE MIDDLE OF NEXT WEEK. A FEW STRONG TO PERHAPS SEVERE STORMS WILL
BE POSSIBLE DURING THIS TIME FRAME...ESPECIALLY WEDNESDAY.

OTHER HAZARDOUS WEATHER...
NONE.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AROUND
NOON TODAY.

MBS

In the hours before

Special weather statement, May 23, 3:49 AM CDT, 2 hours 9 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
349 AM CDT THU MAY 23 2013

OKZ018-019-024>031-231100-
KINGFISHER-LOGAN-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-
INCLUDING THE CITIES OF...KINGFISHER...GUTHRIE...YUKON...
EL RENO...MUSTANG...OKLAHOMA CITY...CHANDLER...CHICKASHA...
PURCELL...NORMAN...MOORE...SHAWNEE...SEMINOLE
349 AM CDT THU MAY 23 2013

...SIGNIFICANT WEATHER ADVISORY FOR SCATTERED TO NUMEROUS
THUNDERSTORMS IN AND NEAR THE OKLAHOMA CITY METRO AREA...

SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP NEAR
THE OKLAHOMA CITY METRO AREA AND AFFECT THE MOORE...EDMOND...
SHAWNEE...AND LUTHER AREAS EARLY THIS MORNING. THE MAIN HAZARDS
FROM THESE STORMS WILL BE CLOUD TO GROUND LIGHTNING STRIKES...
SMALL HAIL LESS THAN THE SIZE OF A QUARTER...AND BRIEF HEAVY
DOWNPOURS. THESE STORMS WILL MOVE EAST OF THE METRO AREA BETWEEN
9 AND 11 AM CDT.

THERE IS A CHANCE THESE STORMS MAY INTENSIFY AND BECOME
SEVERE WITH HAIL UP TO THE SIZE OF HALF DOLLARS. NO
TORNADOES ARE EXPECTED WITH THESE STORMS.

MBS

Special weather statement, May 23, 5:03 AM CDT, 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
503 AM CDT THU MAY 23 2013

OKZ017-018-231030-
KINGFISHER OK-BLAINE OK-
503 AM CDT THU MAY 23 2013

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN KINGFISHER AND
NORTHEASTERN BLAINE COUNTIES UNTIL 530 AM CDT...

AT 502 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR HITCHCOCK...
MOVING SOUTHEAST AT 25 MPH.

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

LOCATIONS IMPACTED INCLUDE...
HITCHCOCK AND OMEGA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE WEATHER IS NOT EXPECTED AND NO WARNINGS ARE ANTICIPATED AT
THIS TIME.

&&

LAT...LON 3578 9819 3595 9845 3611 9835 3612 9821
TIME...MOT...LOC 1002Z 296DEG 22KT 3600 9832

MBS

Special weather statement, May 23, 5:44 AM CDT, 14 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
544 AM CDT THU MAY 23 2013

OKZ017-231130-
BLAINE OK-
544 AM CDT THU MAY 23 2013

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN BLAINE COUNTY UNTIL
630 AM CDT...

AT 543 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR OKEENE...
MOVING EAST AT 20 MPH.

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

LOCATIONS IMPACTED INCLUDE...
OKEENE AND HOMESTEAD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3596 9821 3609 9856 3616 9846 3616 9821
TIME...MOT...LOC 1041Z 276DEG 19KT 3616 9837

MBS

Special weather statement, May 23, 5:54 AM CDT, 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
554 AM CDT THU MAY 23 2013

OKZ018-019-024>031-231300-
KINGFISHER-LOGAN-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-
INCLUDING THE CITIES OF...KINGFISHER...GUTHRIE...YUKON...
EL RENO...MUSTANG...OKLAHOMA CITY...CHANDLER...CHICKASHA...
PURCELL...NORMAN...MOORE...SHAWNEE...SEMINOLE
554 AM CDT THU MAY 23 2013

...SIGNIFICANT WEATHER ADVISORY FOR NUMEROUS THUNDERSTORMS IN AND
NEAR THE OKLAHOMA CITY METRO AREA...

NUMEROUS SHOWERS AND THUNDERSTORMS WILL CONTINUE STRENGTHEN AND
AFFECT THE OKLAHOMA CITY METRO AREA INCLUDING THE MOORE...
EDMOND...SHAWNEE...LUTHER...NORMAN...NEW CASTLE...EL RENO...
KINGFISHER...AND CHANDLER AREAS EARLY THIS MORNING. THE MAIN
HAZARDS FROM THESE STORMS WILL BE HAIL...CLOUD TO GROUND
LIGHTNING STRIKES...AND HEAVY DOWNPOURS. THESE STORMS WILL MOVE
EAST OF THE METRO AREA BETWEEN 9 AND 11 AM CDT.

THESE STORMS MAY BECOME SEVERE WITH HAIL NEAR OR PERHAPS LARGER
THAN HALF DOLLARS. NO TORNADOES ARE EXPECTED WITH THESE STORMS.

MBS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 23, 5:03 AM CDT	Special Weather Statement	OUN	Blaine	27 min
May 23, 5:44 AM CDT	Special Weather Statement	OUN	Blaine	46 min
May 23, 6:06 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	39 min
May 23, 6:30 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	60 min
May 23, 6:32 AM CDT	Special Weather Statement	OUN	Pontotoc	58 min
May 23, 6:42 AM CDT	Flash Flood Warning	OUN	Canadian, Cleveland, Grady, Kingfisher, Logan, McClain and 1 more	6 hr
May 23, 6:44 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian, Cleveland, Grady, Kingfisher, Logan and 2 more	61 min
May 23, 6:54 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, Grady, McClain	51 min
May 23, 7:28 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, Grady, McClain, Pontotoc, Pottawatomie	47 min
May 23, 8:00 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray, Stephens	45 min
May 23, 8:39 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Marshall, Murray	51 min
May 23, 9:16 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Carter, Johnston, Love, Marshall	44 min
May 23, 9:43 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Oklahoma	47 min
May 23, 9:59 AM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Johnston, Marshall	46 min
May 23, 10:08 AM CDT	Areal Flood Advisory	OUN	Johnston, Murray	3 hr
May 23, 10:27 AM CDT	Special Weather Statement	OUN	Oklahoma	33 min
May 23, 10:35 AM CDT	Special Weather Statement	OUN	Cleveland	25 min
May 23, 11:17 AM CDT	Special Weather Statement	OUN	Kay	28 min
May 23, 11:18 AM CDT	Special Weather Statement	OUN	Logan	27 min
May 23, 12:03 PM CDT	Areal Flood Advisory	OUN	Grant, Kay, Noble	3 hr
May 23, 12:51 PM CDT	Special Weather Statement	OUN	Lincoln, Noble, Payne	24 min
May 23, 1:09 PM CDT	Areal Flood Advisory	OUN	Garfield, Lincoln, Noble, Payne	3 hr
May 23, 2:36 PM CDT	River Flood Warning	OUN	Oklahoma	5 hr
May 23, 2:43 PM CDT	Special Weather Statement	OUN	Kay	32 min
May 23, 3:16 PM CDT	Special Weather Statement	OUN	Grant	29 min
May 23, 4:30 PM CDT	Special Weather Statement	OUN	Foard	45 min
May 23, 5:18 PM CDT	Special Weather Statement	OUN	Knox	42 min
May 23, 5:32 PM CDT	Severe Thunderstorm Warning	OUN	Knox	43 min
May 23, 6:14 PM CDT	Special Weather Statement	OUN	Knox	31 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2013 Every severe thunderstorm warning in 2013

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.