Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 503, NWS Norman, OK

June 5, 20136 counties in Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 5, 2013, 4:08 AM CDT for 6 counties in Oklahoma. It was in force for 52 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: Jun 5, 2013, 4:08 AM CDT (09:08 UTC)
Expired: Jun 5, 2013, 5:00 AM CDT
In force: 52 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

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

The radar

The Norman radar (KTLX), 22 km from the middle of the area, began a volume at 09:09 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.

Issued	Product	Office	Lasted
Jun 4, 9:37 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 9.1 hours before the alert went out and 152 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: 1875 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 996 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 3.9

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 Jun 5, 4:06 AM CDT, 2 minutes earlier.

Area forecast discussion, Jun 5, 4:06 AM CDT, 2 minutes before

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Hazardous weather outlook, Jun 4, 10:30 PM CDT, 5 hours 38 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE NORMAN OK
1030 PM CDT TUE JUN 4 2013

OKZ004>048-050>052-TXZ083>090-051200-
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-
1030 PM CDT TUE JUN 4 2013

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

.DAY ONE...TONIGHT...

THUNDERSTORM OUTLOOK...
STRONG TO SEVERE STORMS WILL BE POSSIBLE ACROSS PORTIONS OF OKLAHOMA
OVERNIGHT.

LOCATION...
THE SLIGHT RISK AREA IS ALONG AND NORTH OF A LINE FROM ERICK... TO
PAULS VALLEY... TO ATOKA.

IMPACTS...
THE STRONGEST STORMS WILL BE CAPABLE OF PRODUCING HAIL UP TO THE SIZE
OF HALF DOLLARS...WIND GUSTS TO 70 MPH...AND HEAVY RAINFALL RESULTING
IN LOCALIZED FLOODING.

TIMING...
THE MOST LIKELY TIMES FOR SEVERE STORMS WILL BE FROM MIDNIGHT THROUGH
THE REMAINDER OF THE OVERNIGHT HOURS.

RECOMMENDED ACTIONS...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL ACROSS
THE RISK AREA SHOULD PREPARE FOR SEVERE WEATHER OPERATIONS OVERNIGHT.

DISCUSSION...
A THUNDERSTORM COMPLEX ACROSS WESTERN KANSAS SOUTH ACROSS THE OKLAHOMA
AND NORTHERN TEXAS PANHANDLES LATE THIS EVENING WILL MOVE EAST AND
SOUTHEAST ACROSS PORTIONS OF WESTERN... NORTHERN AND CENTRAL SECTIONS OF
OKLAHOMA OVERNIGHT. A FEW OF THESE STORMS WILL LIKELY BE SEVERE...
PRODUCING HAIL TO THE SIZE OF HALF DOLLARS AND WIND GUSTS TO 70 MPH.
HEAVY RAIN LEADING TO FLASH FLOODING WILL ALSO BE A CONCERN... ESPECIALLY
IN THOSE AREAS THAT HAVE SEEN HEAVY RAIN RECENTLY.

PROBABILITY TABLE...
VALID THROUGH 700 PM CDT WEDNESDAY JUN 5.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
              NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...80 PERCENT.

OTHER HAZARDOUS WEATHER...
NONE.

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

THUNDERSTORM OUTLOOK...
THUNDERSTORMS WILL REMAIN POSSIBLE INTO THE WEEKEND ACROSS PARTS OF
OKLAHOMA AND WESTERN NORTH TEXAS. STRONG SEVERE STORMS WILL BE POSSIBLE
ACROSS PARTS OF OKLAHOMA AND WESTERN NORTH TEXAS WEDNESDAY AND THURSDAY.
LARGE HAIL AND STRONG WINDS WILL BE THE MAIN CONCERNS. ALTHOUGH A TORNADO
OR TWO MAY ALSO OCCUR...THE OVERALL TORNADO THREAT WILL BE LOW.

OTHER HAZARDOUS WEATHER...
HEAVY RAINFALL AND LOCALIZED FLOODING POTENTIAL IS HIGHEST WEDNESDAY
AND EARLY THURSDAY IN CENTRAL AND SOUTHERN OKLAHOMA.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY 5 AM
WEDNESDAY JUNE 5.

In the hours before

Special weather statement, Jun 5, 3:30 AM CDT, 38 minutes before

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Special weather statement, Jun 5, 3:40 AM CDT, 28 minutes before

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Special weather statement, Jun 5, 3:53 AM CDT, 15 minutes before

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Special weather statement, Jun 5, 3:57 AM CDT, 11 minutes before

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Local storm report, Jun 5, 4:00 AM CDT, 8 minutes before

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Local storm report, Jun 5, 4:08 AM 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
Jun 4, 11:28 PM CDT	Special Weather Statement	OUN	Harper	47 min
Jun 4, 11:36 PM CDT	Severe Thunderstorm Warning	OUN	Harper	39 min
Jun 5, 12:09 AM CDT	Severe Thunderstorm Warning	OUN	Ellis, Harper, Woods, Woodward	66 min
Jun 5, 12:50 AM CDT	Special Weather Statement	OUN	Ellis	40 min
Jun 5, 1:03 AM CDT	Severe Thunderstorm Warning	OUN	Major, Woods, Woodward	42 min
Jun 5, 1:16 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Woodward	44 min
Jun 5, 1:23 AM CDT	Special Weather Statement	OUN	Comanche	37 min
Jun 5, 1:37 AM CDT	Special Weather Statement	OUN	Stephens	23 min
Jun 5, 1:37 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	38 min
Jun 5, 1:55 AM CDT	Special Weather Statement	OUN	Ellis	35 min
Jun 5, 2:11 AM CDT	Special Weather Statement	OUN	Comanche, Jefferson, Stephens	49 min
Jun 5, 2:12 AM CDT	Special Weather Statement	OUN	Alfalfa, Garfield, Grant	48 min
Jun 5, 2:23 AM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Garfield, Grant, Major	52 min
Jun 5, 2:26 AM CDT	Special Weather Statement	OUN	Blaine, Dewey	49 min
Jun 5, 2:37 AM CDT	Special Weather Statement	OUN	Carter, Garvin, Love	38 min
Jun 5, 2:49 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Custer, Washita	41 min
Jun 5, 2:59 AM CDT	Special Weather Statement	OUN	Murray	31 min
Jun 5, 3:00 AM CDT	Special Weather Statement	OUN	Love	30 min
Jun 5, 3:05 AM CDT	Special Weather Statement	OUN	Grady	25 min
Jun 5, 3:11 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Marshall	49 min
Jun 5, 3:13 AM CDT	Special Weather Statement	OUN	Canadian, Kingfisher, Logan	32 min
Jun 5, 3:19 AM CDT	Special Weather Statement	OUN	Kay, Logan, Noble	26 min
Jun 5, 3:30 AM CDT	Special Weather Statement	OUN	Blaine	30 min
Jun 5, 3:40 AM CDT	Special Weather Statement	OUN	Pontotoc	50 min
Jun 5, 3:53 AM CDT	Special Weather Statement	OUN	Kay, Lincoln, Logan, Noble, Payne	52 min
Jun 5, 3:57 AM CDT	Special Weather Statement	OUN	Cleveland, Oklahoma, Pottawatomie	48 min
Jun 5, 4:15 AM CDT	Special Weather Statement	OUN	Caddo, Grady	30 min
Jun 5, 4:23 AM CDT	Areal Flood Advisory	OUN	Cleveland, McClain, Oklahoma	3 hr
Jun 5, 4:39 AM CDT	Special Weather Statement	OUN	Lincoln	36 min
Jun 5, 4:50 AM CDT	Special Weather Statement	OUN	Grady, McClain	25 min
Jun 5, 5:08 AM CDT	Special Weather Statement	OUN	Garvin, Stephens	37 min
Jun 5, 5:18 AM CDT	Special Weather Statement	OUN	Carter	27 min
Jun 5, 5:42 AM CDT	Special Weather Statement	OUN	Garvin, Stephens	48 min
Jun 5, 5:45 AM CDT	Special Weather Statement	OUN	Carter	30 min
Jun 5, 6:10 AM CDT	Special Weather Statement	OUN	Marshall	35 min
Jun 5, 6:22 AM CDT	Special Weather Statement	OUN	Carter, Murray	23 min
Jun 5, 12:34 PM CDT	River Flood Warning	OUN	Oklahoma	8 hr
Jun 5, 2:03 PM CDT	River Flood Warning	OUN	Lincoln, Oklahoma, Pottawatomie	17 hr
Jun 4, 7:02 PM CDT	Special Weather Statement	OUN	Knox	43 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.