Alert archive / Oklahoma / Special Weather Statements in 2011
Special Weather Statement, NWS Norman, OK
NWS Norman, OK issued this special weather statement at Jul 29, 2011, 6:49 PM CDT for Grant 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 outline as issued.
The facts
- Issued
- Jul 29, 2011, 6:49 PM CDT (23:49 UTC)
- Expired
- Jul 29, 2011, 7:15 PM CDT
- In force
- 26 min
- Issued by
- NWS Norman, OK
County Grant County, OK
The radar
The Vance AFB radar (KVNX), 50 km from the middle of the area, began a volume at 23:48 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, 11.8 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.
- 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
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>What forecasters said that day
The local office's own words before this special weather statement 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 special weather statement went out at Jul 29, 2:11 PM CDT, 4 hours 38 minutes earlier.
Area forecast discussion, Jul 29, 2:11 PM CDT, 4 hours 38 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, 5:22 PM CDT, 1 hour 27 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE NORMAN OK
522 PM 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-
522 PM CDT FRI JUL 29 2011
THIS HAZARDOUS WEATHER OUTLOOK COVERS NORTHERN...WESTERN...
CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH TEXAS.
.DAY ONE...THIS EVENING AND TONIGHT...
THUNDERSTORM OUTLOOK...
A FEW THUNDERSTORMS SHOULD PERSIST THROUGH THE EARLY EVENING HOURS.
WIND GUSTS OVER 55 MPH ARE POSSIBLE WITH THE STRONGER STORMS.
DISCUSSION...
SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE NEAR AN OUTFLOW
BOUNDARY ACROSS NORTHWEST OKLAHOMA INTO EARLY EVENING. OTHER STORMS
MAY AFFECT PORTIONS OF SOUTH CENTRAL AND 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...ALONG WITH
LOCALIZED HEAVY RAINFALL.
PROBABILITY TABLE...
VALID THROUGH 700 AM CDT SATURDAY JUL 30.
PROBABILITY OF THUNDERSTORMS OCCURRING IN THE
NWS NORMAN COUNTY WARNING AREA...100 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 THROUGH THURSDAY.
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 WILL 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, 3:45 PM CDT, 3 hours 4 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
Special weather statement, Jul 29, 4:06 PM CDT, 2 hours 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 406 PM CDT FRI JUL 29 2011 OKZ004-010-292130- HARPER OK-WOODWARD OK- 406 PM CDT FRI JUL 29 2011 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR HARPER AND WOODWARD COUNTIES. AT 406 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 3 MILES EAST OF ALABASTER CAVERNS STATE PARK TO 4 MILES NORTH OF TANGIER. THESE STORMS ARE NEARLY STATIONARY. HAZARDS INCLUDE... WIND GUSTS 40 TO 50 MPH... HEAVY DOWNPOURS... LAT...LON 3656 9900 3637 9958 3657 9960 3673 9911
Special weather statement, Jul 29, 5:50 PM CDT, 59 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
550 PM CDT FRI JUL 29 2011
OKZ007-292315-
GRANT OK-
550 PM CDT FRI JUL 29 2011
...SIGNIFICANT WEATHER ADVISORY...
THIS SIGNIFICANT WEATHER ADVISORY IS FOR GRANT COUNTY.
AT 549 PM CDT...STRONG THUNDERSTORMS WERE LOCATED 3 MILES EAST OF
RENFROW... NEAR JEFFERSON... AND 5 MILES EAST OF NASH...MOVING EAST
AT 5 MPH.
HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...
LAT...LON 3668 9748 3659 9800 3660 9811 3699 9807
3701 9773 3701 9747
..SPEG.Special weather statement, Jul 29, 6:17 PM CDT, 32 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 617 PM CDT FRI JUL 29 2011 OKZ007-008-292345- GRANT OK-KAY OK- 617 PM CDT FRI JUL 29 2011 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR GRANT AND KAY COUNTIES. AT 617 PM CDT...STRONG THUNDERSTORMS WERE LOCATED ACROSS CENTRAL AND EASTERN GRANT COUNTY... FROM RENFROW TO POND CREEK...MOVING EAST AT 5 MPH. HAZARDS INCLUDE... WIND GUSTS TO 55 MPH... MINOR FLOODING IN AREAS OF POOR DRAINAGE... LAT...LON 3660 9755 3659 9804 3701 9783 3700 9729 ..SPEG.
Special weather statement, Jul 29, 6:38 PM CDT, 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 638 PM CDT FRI JUL 29 2011 OKZ017-300015- BLAINE OK- 638 PM CDT FRI JUL 29 2011 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR BLAINE COUNTY. AT 639 PM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR SOUTHARD...AND WAS NEARLY STATIONARY. HAZARDS INCLUDE... WIND GUSTS TO 50 MPH... LAT...LON 3616 9864 3616 9829 3597 9839 3588 9863 ..SPEG.
Special weather statement, Jul 29, 6:49 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 649 PM CDT FRI JUL 29 2011 OKZ007-008-300015- GRANT OK-KAY OK- 649 PM CDT FRI JUL 29 2011 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR GRANT AND KAY COUNTIES. AT 648 PM CDT...A LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 5 MILES EAST OF MEDFORD TO 5 MILES SOUTHEAST OF POND CREEK. ANOTHER LINE OF STRONG THUNDERSTORMS WAS LOCATED FROM 7 MILES EAST OF RENFROW TO 5 MILES WEST OF TONKAWA. THESE STORMS WERE NEARLY STATIONARY. HAZARDS INCLUDE... WIND GUSTS TO 50 MPH... MINOR FLOODING IN AREAS OF POOR DRAINAGE... LAT...LON 3700 9735 3659 9726 3660 9802 3701 9790 ..SPEG.
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, 3:53 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa, Woods | 52 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 |
Nearby
Special Weather Statements in Oklahoma, 2011Every special weather statement 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.