Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 448, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jul 29, 2011, 3:53 PM CDT for Alfalfa County, Woods County, 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
- Jul 29, 2011, 3:53 PM CDT (20:53 UTC)
- Expired
- Jul 29, 2011, 4:45 PM CDT
- In force
- 52 min
- Issued by
- NWS Norman, OK
- Area
- Storm-based polygon
Counties Alfalfa County, OK, Woods County, OK
The radar
The Vance AFB radar (KVNX), 42 km from the middle of the area, began a volume at 20:55 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
Lamont, OK (KLMN), launched 12:00Z, 8.9 hours before the alert went out and 100 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.
- Mixed-layer CAPE
- 139 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 1828 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- -42 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
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 29, 2:11 PM CDT, 1 hour 42 minutes earlier.
Area forecast discussion, Jul 29, 2:11 PM CDT, 1 hour 42 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 211 PM CDT FRI JUL 29 2011 .DISCUSSION... HEAT WILL CONTINUE TO BE THE MAJOR ISSUE THROUGH LATE NEXT WEEK. SOME PRECIPITATION WILL BE POSSIBLE TONIGHT/SATURDAY. SHOWERS AND THUNDERSTORMS HAVE BEEN DEVELOPING OVER THE PAST FEW HOURS THIS AFTERNOON WITH THE BEST COVERAGE IN NORTHERN AND SOUTHEAST/SOUTH CENTRAL PORTIONS OF THE FA. THE NORTHERN ACTIVITY IS NEAR REMNANT OUTFLOW BOUNDARY FROM LAST NIGHT'S CONVECTION IN KANSAS WHILE THE STORMS IN THE SOUTH ARE WHERE DEEPER MOISTURE HAS DEVELOPED. SHOWERS AND STORMS WILL REMAIN POSSIBLE ALMOST EVERYWHERE INTO EARLY EVENING... WITH MOST OF THE ACTIVITY EXPECTED TO END AROUND SUNSET. HOWEVER... RAIN CHANCES WILL CONTINUE OVERNIGHT ACROSS NORTHERN OK. SHOWERS AND THUNDERSTORMS WILL BE POSSIBLE AGAIN SATURDAY DUE HEATING OF THE BETTER MOISTURE THAT HAS MOVED INTO THE REGION. UPPER RIDGE IS EXPECTED TO BE CENTERED OVER THE REGION NEXT WEEK CONTINUING THE VERY HOT CONDITIONS OVER THE AREA. WITH THIS IN MIND... WILL EXTEND THE HEAT ADVISORY THROUGH THURSDAY EVENING. && .PRELIMINARY POINT TEMPS/POPS... OKLAHOMA CITY OK 79 100 77 102 / 10 10 10 10 HOBART OK 80 102 80 105 / 10 10 10 10 WICHITA FALLS TX 79 104 82 106 / 20 10 10 10 GAGE OK 74 102 76 104 / 20 10 10 10 PONCA CITY OK 78 101 80 104 / 20 20 10 10 DURANT OK 78 98 79 100 / 30 20 10 10 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...HEAT ADVISORY UNTIL 10 PM CDT THURSDAY FOR OKZ004>048-050>052. TX...HEAT ADVISORY UNTIL 10 PM CDT THURSDAY FOR TXZ083>090. && 06/25
Hazardous weather outlook, Jul 29, 11:45 AM CDT, 4 hours 8 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
1145 AM CDT FRI JUL 29 2011
OKZ004>048-050>052-TXZ083>090-301100-
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-
1145 AM CDT FRI JUL 29 2011
THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.
.DAY ONE...THIS AFTERNOON AND TONIGHT...
THUNDERSTORM OUTLOOK...
A FEW THUNDERSTORMS SHOULD DEVELOP DURING THE AFTERNOON AND
EARLY EVENING HOURS. WIND GUSTS OVER 55 MPH ARE POSSIBLE WITH THE
STRONGER STORMS.
DISCUSSION...
AN OUTFLOW BOUNDARY ACROSS NORTHWEST OKLAHOMA MAY PROVIDE THE
FOCUS FOR ISOLATED TO WIDELY SCATTERED AFTERNOON THUNDERSTORMS.
OTHER STORMS MAY FORM ALONG THE HIGHER TERRAIN OF SOUTHEAST
OKLAHOMA. STORM INTENSITY WILL DECREASE DURING THE EARLY TO MID
EVENING HOURS. ALTHOUGH INSTABILITY WILL BE WEAK...ANY STORMS THAT
OCCUR WILL POSE A THREAT TO PRODUCE LOCALLY DAMAGING WINDS. CLOUD TO
GROUND LIGHTNING AND LIGHTNING INDUCED FIRES ARE ALSO A HAZARD.
PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY JUL 30.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...60 PERCENT.
PROBABILITY OF SEVERE STORMS IF STORMS OCCUR...30 PERCENT.
OTHER HAZARDOUS WEATHER...
A HEAT ADVISORY REMAINS IN EFFECT...AS A DANGEROUS HEAT WAVE
CONTINUES.
.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...
THUNDERSTORM OUTLOOK...
THE NATIONAL HURRICANE CENTER FORECASTS TROPICAL STORM DON TO MOVE
INLAND OVER FAR SOUTH TEXAS. THE TROPICAL STORM WILL NOT AFFECT
NORTH TEXAS OR OKLAHOMA DIRECTLY. INCREASED HIGH LEVEL
MOISTURE...HOWEVER...MAY LEAD TO A SLIGHT INCREASE IN AFTERNOON
THUNDERSTORM ACTIVITY ON SATURDAY AND SUNDAY...MAINLY ACROSS WESTERN
NORTH TEXAS AND SOUTHERN OKLAHOMA. GENERALLY SPEAKING...THUNDERSTORM
CHANCES WILL REMAIN VERY LOW ON DAYS TWO THROUGH SEVEN.
OTHER HAZARDOUS WEATHER...
THE HEAT ADVISORY IS EFFECTIVE THROUGH SUNDAY AND IS LIKELY TO BE
EXTENDED WELL INTO NEXT WEEK. LONG RANGE FORECASTS CONTINUE TO SHOW
NO SIGNS THAT THE HEAT WAVE MAY BREAK. UNUSUALLY DRY VEGETATION WILL
ALSO MAINTAIN VERY HIGH WILDFIRE POTENTIAL...ESPECIALLY ON BREEZY
DAYS.
THE NEXT SCHEDULED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED BY
5 AM SATURDAY.In the hours before
Special weather statement, Jul 29, 1:51 PM CDT, 2 hours 2 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 151 PM CDT FRI JUL 29 2011 OKZ041-042-291900- MURRAY OK-PONTOTOC OK- 151 PM CDT FRI JUL 29 2011 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR MURRAY AND PONTOTOC COUNTIES. AT 150 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF HICKORY. THE STORM WAS NEARLY STATIONARY. HAZARDS INCLUDE... WIND GUSTS TO 50 MPH... LAT...LON 3474 9685 3472 9658 3451 9660 3452 9689
Special weather statement, Jul 29, 2:07 PM CDT, 1 hour 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
207 PM CDT FRI JUL 29 2011
OKZ039-045-046-050-291930-
CARTER OK-JEFFERSON OK-LOVE OK-STEPHENS OK-
207 PM CDT FRI JUL 29 2011
...SIGNIFICANT WEATHER ADVISORY...
THIS SIGNIFICANT WEATHER ADVISORY IS FOR CARTER...JEFFERSON...LOVE
AND STEPHENS COUNTIES.
AT 206 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF
RINGLING. THE STORM WAS NEARLY STATIONARY. BRIEF HEAVY RAINFALL
AND WIND GUSTS NEAR 50 MPH ARE POSSIBLE WITH THIS STORM.
HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...
LAT...LON 3434 9761 3428 9733 3390 9745 3391 9751
3389 9755 3390 9758 3391 9760 3396 9761
3399 9768 3389 9778 3387 9782Special weather statement, Jul 29, 2:42 PM CDT, 1 hour 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 242 PM CDT FRI JUL 29 2011 OKZ005-010-011-015-292015- DEWEY OK-WOODWARD OK-MAJOR OK-WOODS OK- 242 PM CDT FRI JUL 29 2011 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR DEWEY...MAJOR...WOODS AND WOODWARD COUNTIES. AT 240 PM CDT...RADAR INDICATED SCATTERED THUNDERSTORMS EXTENDING FROM CLEO SPRINGS TO MUTUAL AND CAMARGO. THE STORMS WERE DRIFTING TO THE NORTHEAST AROUND 5 MPH. WIND GUSTS NEAR 55 MPH AND OCCASIONAL LIGHTING ARE LIKELY WITH THESE STORMS. HAZARDS INCLUDE... WIND GUSTS TO 55 MPH... LAT...LON 3666 9874 3637 9850 3597 9923 3625 9940
Special weather statement, Jul 29, 3:15 PM CDT, 38 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
315 PM CDT FRI JUL 29 2011
OKZ051-052-292045-
BRYAN OK-MARSHALL OK-
315 PM CDT FRI JUL 29 2011
...SIGNIFICANT WEATHER ADVISORY...
THIS SIGNIFICANT WEATHER ADVISORY IS FOR BRYAN AND MARSHALL COUNTIES.
AT 314 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 7 MILES SOUTHWEST
OF LAKE TEXOMA. THE STORM WAS NEARLY STATIONARY. THIS STORM MAY
DRIFT SLOWLY NORTH OVER THE NEXT 30 MINUTES. WIND GUSTS OVER
50 MPH AND OCCASIONAL LIGHTNING ARE LIKELY.
HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...
LAT...LON 3383 9662 3385 9664 3388 9660 3391 9665
3390 9667 3386 9667 3383 9671 3382 9676
3384 9678 3386 9679 3393 9666 3382 9654
3381 9657Local storm report, Jul 29, 3:32 PM CDT, 21 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<div class="status" id="status">Temporary Notice</div>
<h1 id="headline">This service is currently unavailable.</h1>
<p id="message1">
The site you requested is temporarily down for maintenance or an unexpected outage.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Special weather statement, Jul 29, 3:45 PM CDT, 8 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 345 PM CDT FRI JUL 29 2011 OKZ005-292115- WOODS OK- 345 PM CDT FRI JUL 29 2011 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR WOODS COUNTY. AT 345 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES EAST OF WAYNOKA. ANOTHER STRONG STORM WAS LOCATED NEAR ALVA. THESE STORMS ARE NEARLY STATIONARY. HAZARDS INCLUDE... WIND GUSTS TO 50 MPH... LAT...LON 3694 9858 3659 9854 3646 9880 3672 9906 MAXWELL
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 29, 1:48 PM CDT | Special Weather Statement | OUN | Carter | 12 min |
| Jul 29, 1:51 PM CDT | Special Weather Statement | OUN | Pontotoc | 9 min |
| Jul 29, 2:07 PM CDT | Special Weather Statement | OUN | Jefferson | 23 min |
| Jul 29, 2:42 PM CDT | Special Weather Statement | OUN | Woodward | 33 min |
| Jul 29, 2:47 PM CDT | Severe Thunderstorm Warning | OUN | Dewey, Major, Woods, Woodward | 58 min |
| Jul 29, 3:45 PM CDT | Special Weather Statement | OUN | Woods | 30 min |
| Jul 29, 4:06 PM CDT | Special Weather Statement | OUN | Woodward | 24 min |
| Jul 29, 5:50 PM CDT | Special Weather Statement | OUN | Grant | 25 min |
| Jul 29, 6:17 PM CDT | Special Weather Statement | OUN | Grant | 28 min |
| Jul 29, 6:38 PM CDT | Special Weather Statement | OUN | Blaine | 37 min |
| Jul 29, 6:49 PM CDT | Special Weather Statement | OUN | Grant | 26 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2011Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.