Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 411, NWS Norman, OK

July 4, 2011Canadian County, Cleveland County, Oklahoma County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jul 4, 2011, 4:49 PM CDT for Canadian County, Cleveland County, Oklahoma County, Oklahoma. It was in force for 26 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 4, 2011, 4:49 PM CDT (21:49 UTC)
Expired: Jul 4, 2011, 5:15 PM CDT
In force: 26 min
Issued by: NWS Norman, OK
Area: Storm-based polygon

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

The radar

The Norman radar (KTLX), 29 km from the middle of the area, began a volume at 21:50 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.

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 4, 3:07 PM CDT, 1 hour 42 minutes earlier.

Area forecast discussion, Jul 4, 3:07 PM CDT, 1 hour 42 minutes before

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Hazardous weather outlook, Jul 4, 4:15 PM CDT, 34 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
415 PM CDT MON JUL 4 2011

OKZ004>048-050>052-TXZ083>090-051000-
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-
415 PM CDT MON JUL 4 2011

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

.DAY ONE...THROUGH TONIGHT...

THUNDERSTORM OUTLOOK...
SEVERE THUNDERSTORMS ARE UNLIKELY.

DISCUSSION...
SEVERAL SHOWERS AND THUNDERSTORMS WILL BE SEEN THROUGH AT LEAST
MID-EVENING...ESPECIALLY ACROSS CENTRAL AND SOUTHERN PORTIONS OF
OKLAHOMA. THE SLOW MOVEMENT AND RELATIVELY SMALL SIZE OF THE SHOWERS
AND STORMS WILL RESULT IN MOST LOCATIONS REMAINING DRY. WITH A DEEP
LAYER OF HOT AND DRY AIR BELOW THE STORM BASES...STRONG WIND GUSTS
WILL BE POSSIBLE WITH THE STRONGER STORMS. TOWARD SUNSET...MOST IF
NOT ALL OF THE SHOWERS AND STORMS ARE EXPECTED TO DISSIPATE.

PROBABILITY TABLE...
VALID THROUGH 700 AM CDT TUESDAY JUL 5.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
                   NWS NORMAN COUNTY WARNING AREA...100 PERCENT.
PROBABILITY A PARTICULAR STORM WILL BECOME SEVERE...20 PERCENT.

OTHER HAZARDOUS WEATHER...
A HOT AIRMASS AND HIGH LEVELS OF WILDFIRE POTENTIAL...ESPECIALLY IN
WESTERN OKLAHOMA AND WESTERN NORTH TEXAS...WILL CONTINUE TODAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY...

THUNDERSTORM OUTLOOK...
THERE WILL BE AT LEAST A SLIGHT CHANCE OF THUNDERSTORMS FROM
WEDNESDAY THROUGH FRIDAY...MAINLY OVER NORTHERN AND EASTERN
OKLAHOMA. THE GREATEST CHANCE FOR STORMS WILL BE ON WEDNESDAY
NIGHT...AS A FRONTAL SYSTEM APPROACHES FROM THE NORTH. ISOLATED
STORMS WILL BE POSSIBLE EACH DAY...PRIMARILY DURING THE AFTERNOON
AND EVENING.

OTHER HAZARDOUS WEATHER...
THERE WILL BE A VERY GRADUAL WARMING TREND THROUGH THE WEEK...SO
THAT HEAT INDEX VALUES WILL RANGE FROM ABOUT 100 TO 107 NEXT
WEEKEND. THE CONTINUING DROUGHT WILL LIKEWISE MAINTAIN AN UNUSUALLY
HIGH RISK OF WILDFIRES THROUGH THE PERIOD...MAINLY ACROSS THE
WESTERN HALF OF OKLAHOMA AND WESTERN NORTH TEXAS.

THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED 5 AM
TUESDAY.

In the hours before

Special weather statement, Jul 4, 1:39 PM CDT, 3 hours 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
139 PM CDT MON JUL 4 2011

TXZ088>090-041915-
CLAY TX-ARCHER TX-BAYLOR TX-
139 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR ARCHER...BAYLOR AND CLAY
COUNTIES.

AT 138 PM CDT...SCATTERED THUNDERSTORMS WERE DEVELOPING FROM LAKE
ARROWHEAD TO MEGARGEL...MOVING NORTHEAST AT 5 MPH. THESE STORMS WILL
PRODUCE OCCASIONAL CLOUD TO GROUND LIGHTNING AND GUSTY WINDS...
WHICH WILL BE HAZARDOUS TO PEOPLE OUTDOORS...INCLUDING AT LAKE
ARROWHEAD.

HAZARDS INCLUDE...
WIND GUSTS TO 45 MPH...
CLOUD TO GROUND LIGHTNING...

LAT...LON 3373 9809 3349 9833 3340 9877 3340 9904
      3352 9903 3383 9839

BURKE

Special weather statement, Jul 4, 3:26 PM CDT, 1 hour 23 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
326 PM CDT MON JUL 4 2011

OKZ038-042100-
COMANCHE OK-
326 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR COMANCHE COUNTY.

AT 324 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER MEERS...MOVING
SOUTH AT 5 MPH. ALTHOUGH SEVERE WEATHER IS NOT EXPECTED...THIS STORM
COULD BE HAZARDOUS TO PEOPLE OUTDOORS IN THE WICHITA MOUNTAINS
WILDLIFE REFUGE...AT MOUNT SCOTT...AND AT LAKE LAWTONKA.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH...
WIND GUSTS TO 50 MPH...
CLOUD TO GROUND LIGHTNING...

LAT...LON 3471 9847 3469 9866 3474 9871 3485 9866
      3485 9850

BURKE

Special weather statement, Jul 4, 4:02 PM CDT, 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
402 PM CDT MON JUL 4 2011

OKZ024-027-042130-
CANADIAN OK-GRADY OK-
402 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR CANADIAN AND GRADY COUNTIES.

AT 401 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 3 MILES NORTHWEST
OF TUTTLE...MOVING NORTHWEST AT 5 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH...
WIND GUSTS TO 50 MPH...
CLOUD TO GROUND LIGHTNING...

LAT...LON 3533 9795 3544 9794 3543 9785 3532 9771
      3525 9778 3527 9791

BURKE

Special weather statement, Jul 4, 4:37 PM CDT, 12 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
437 PM CDT MON JUL 4 2011

OKZ025-029-042200-
OKLAHOMA OK-CLEVELAND OK-
437 PM CDT MON JUL 4 2011

...SIGNIFICANT WEATHER ADVISORY...

THIS SIGNIFICANT WEATHER ADVISORY IS FOR CLEVELAND AND OKLAHOMA
COUNTIES.

AT 437 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 2 MILES EAST OF
WILL ROGERS WORLD AIRPORT IN OKLAHOMA CITY... ...MOVING NORTHEAST AT
5 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 55 MPH...

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

LAT...LON 3530 9749 3537 9767 3540 9767 3557 9758
      3548 9736

..SPEG.

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 7:07 PM CDT	Special Weather Statement	OUN	Custer, Roger Mills	23 min
Jul 3, 7:24 PM CDT	Special Weather Statement	OUN	Blaine	21 min
Jul 3, 7:40 PM CDT	Special Weather Statement	OUN	Custer	20 min
Jul 3, 7:58 PM CDT	Special Weather Statement	OUN	Kingfisher, Lincoln, Logan	17 min
Jul 3, 8:23 PM CDT	Special Weather Statement	OUN	Kingfisher, Lincoln, Oklahoma	22 min
Jul 3, 8:29 PM CDT	Special Weather Statement	OUN	Washita	16 min
Jul 3, 8:57 PM CDT	Special Weather Statement	OUN	Canadian, Lincoln, Oklahoma	18 min
Jul 4, 3:26 PM CDT	Special Weather Statement	OUN	Comanche	34 min
Jul 4, 4:02 PM CDT	Special Weather Statement	OUN	Canadian	28 min
Jul 4, 4:37 PM CDT	Special Weather Statement	OUN	Oklahoma	23 min
Jul 4, 5:07 PM CDT	Special Weather Statement	OUN	Custer	38 min
Jul 4, 5:31 PM CDT	Special Weather Statement	OUN	Oklahoma	29 min
Jul 4, 5:48 PM CDT	Special Weather Statement	OUN	Seminole	12 min
Jul 3, 7:11 PM CDT	Special Weather Statement	OUN	Baylor	34 min
Jul 4, 1:39 PM CDT	Special Weather Statement	OUN	Archer	36 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.