Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 339, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 10, 2007, 2:02 AM CDT for Alfalfa County, Oklahoma. It was in force for 43 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 10, 2007, 2:02 AM CDT (07:02 UTC)
- Expired
- Jun 10, 2007, 2:45 AM CDT
- In force
- 43 min
- Issued by
- NWS Norman, OK
- Area
- Counties, with a storm outline in the text
County Alfalfa County, OK
The radar
The Vance AFB radar (KVNX), 18 km from the middle of the area, began a volume at 07:05 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 00:00Z, 7.0 hours before the alert went out and 76 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
- 2975 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 1125 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 173 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 9.4
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 9, 9:34 PM CDT, 4 hours 28 minutes earlier.
Area forecast discussion, Jun 9, 9:34 PM CDT, 4 hours 28 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 934 PM CDT SAT JUN 9 2007 .DISCUSSION... THE SCATTERED THUNDERSTORMS IN THE EASTERN HALF OF THE AREA HAVE DECREASED IN COVERAGE AFTER SUNSET. HOWEVER THE STORMS OUT WEST HAVE ORGANIZED A BIT MORE AND LOOK TO PERSIST LONGER INTO THE NIGHT. WILL BE UPDATING ZONES TO ACCOUNT FOR CURRENT RADAR TRENDS FOR THIS EVENING... AND TO INCREASE POPS SLIGHTLY IN THE NORTHWEST FOR THE EARLY MORNING HOURS. && .PREV DISCUSSION... /ISSUED 247 PM CDT SAT JUN 9 2007/ SHORT TERM... VERY UNSTABLE CONDITIONS EXIST ACROSS S OK AND N TX WITH SFC DEWPOINTS IN LOW 70S AND SBCAPE 3000-4500 J/KG. REMNANT WARM FRONT LIES SOMEWHERE ACROSS CENTRAL OR S OK BUT IS DIFFICULT TO PINPOINT. LACK OF A WELL-DEFINED CONVECTIVE FOCUS AND WEAK VERTICAL SHEAR WILL LIMIT THE POTENTIAL FOR STORM SCALE ORGANIZATION AND WILL LIKELY LEAD TO RELATIVELY SHORT-LIVED MULTICELL PULSE STORMS. HIGH CAPES WILL SUPPORT HAIL/MICROBURSTS WITH A FEW STORMS. AREAS FROM I-40 S HAVE BEEN UPPED TO A SLIGHT RISK OF SEVERE THROUGH MID-LATE EVENING. CONVECTIVE POTENTIAL WILL LIFT N INTO CENTRAL OK BY EARLY EVENING AS HIGHER DEWPOINTS AND INSTABILITY SPREAD N... BUT CONVECTIVE POTENTIAL WILL DECREASE AFTER SUNSET AS LOW LEVELS COOL/STABILIZE. WILL MAINTAIN LOW POPS AREAWIDE THROUGH MID-LATE EVENING. SIMILAR CONDITIONS PROGGED ON SUNDAY WITH MODERATE INSTABILITY AND WEAK CAP. LONG TERM... UPPER LOW CURRENTLY OFF THE S CA COAST WILL BE THE MAIN PLAYER LATER IN THE WEEK AS IT ARRIVES IN THE PLAINS. LATEST MED-RANGE MODEL TRENDS HAVE THIS LOW OPENING UP AND EJECTING TO NEAR COLORADO BY AROUND TUESDAY BEFORE CLOSING OFF AGAIN AND LOITERING OVER THE CENTRAL OR S PLAINS WELL INTO THE LATTER HALF OF THE WEEK. HIGHEST POPS WILL BE KEPT IN THE WED/WED NIGHT TIME FRAME... DURING WHICH TIME MOST OF THE MODELS BRING A FRONT SLOWLY INTO OR THROUGH THE AREA. BEYOND THU... OPERATIONAL 12Z GFS HAS LIMITED SUPPORT FROM ITS ENSEMBLE MEMBERS AS FAR AS CUTTING OFF A 500MB LOW OVER OR NEAR OK. MAJORITY OF THE ENSEMBLE MEMBERS HAVE THIS SYSTEM FARTHER E OR SE... FROM TX INTO THE LOWER OR MID MS VALLEY BY LATE THU. ALTHOUGH THE GFS HAS MORE SUPPORT FROM THE 12Z ECMWF... AND TO SOME EXTENT THE 06Z DGEX... WILL OPT TO KEEP PRECIP OUT OF THE FORECAST FROM THU NIGHT INTO NEXT WEEKEND. TEMPS IN LATER PERIODS ARE FROM THE 12 MEX WITH ONLY SMALL ADJUSTMENTS. && .PRELIMINARY POINT TEMPS/POPS... OKLAHOMA CITY OK 70 88 71 89 / 10 20 10 20 HOBART OK 69 91 70 93 / 20 20 10 20 WICHITA FALLS TX 72 89 72 91 / 10 20 10 20 GAGE OK 67 88 67 90 / 20 20 20 20 PONCA CITY OK 70 89 71 90 / 30 20 10 20 DURANT OK 71 89 70 89 / 10 20 10 20 && .OUN WATCHES/WARNINGS/ADVISORIES... OK...NONE. TX...NONE. &&
Hazardous weather outlook, Jun 10, 1:05 AM CDT, 57 minutes before
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</html>In the hours before
Special weather statement, Jun 9, 9:45 PM CDT, 4 hours 17 minutes before
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</html>Special weather statement, Jun 9, 10:15 PM CDT, 3 hours 47 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1015 PM CDT SAT JUN 9 2007 OKZ007-100330- GRANT OK- 1015 PM CDT SAT JUN 9 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR GRANT COUNTY. A STRONG THUNDERSTORM WAS LOCATED NEAR MEDFORD AT 1015 PM CDT... MOVING NORTH AT 15 MPH. SMALL HAIL AND WINDS AROUND 50 MPH ARE POSSIBLE. PEOPLE IN GRANT COUNTY SHOULD MONITOR THE WEATHER SITUATION CLOSELY AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS.
Special weather statement, Jun 9, 10:30 PM CDT, 3 hours 32 minutes before
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</html>Special weather statement, Jun 10, 1:50 AM CDT, 12 minutes before
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</html>Special weather statement, Jun 10, 1:55 AM CDT, 7 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 155 AM CDT SUN JUN 10 2007 OKZ004-100715- HARPER OK- 155 AM CDT SUN JUN 10 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR HARPER COUNTY. A STRONG THUNDERSTORM WAS LOCATED 3 MILES SOUTH OF SELMAN AT 155 AM CDT...MOVING EAST AT 20 MPH. SMALL HAIL AND GUSTY WINDS ARE LIKELY. PEOPLE IN HARPER COUNTY SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. JAMES
Special weather statement, Jun 10, 1:57 AM CDT, 5 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 157 AM CDT SUN JUN 10 2007 OKZ005>007-100715- WOODS OK-ALFALFA OK-GRANT OK- 157 AM CDT SUN JUN 10 2007 ...SIGNIFICANT WEATHER ADVISORY... THIS SIGNIFICANT WEATHER ADVISORY IS FOR ALFALFA...GRANT AND WOODS COUNTIES. AT 157 AM...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM LOOKOUT...TO NEAR CONWAY SPRINGS IN KANSAS...MOVING SOUTH AT 15 MPH. THESE STORMS WILL LIKELY MOVE INTO NORTHERN PARTS OF WOODS...ALFALFA...AND GRANT COUNTIES THROUGH 230 AM. MARGINALLY SEVERE WEATHER IS POSSIBLE. PEOPLE IN ALFALFA...GRANT AND WOODS COUNTIES...INCLUDING THE CITY OF ALVA...SHOULD MONITOR THE WEATHER SITUATION CLOSELY. LISTEN FOR WARNINGS AND REMAIN ALERT FOR THREATENING WEATHER CONDITIONS. JAMES
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 9, 11:01 PM CDT | Severe Thunderstorm Warning | OUN | Grant | 44 min |
| Jun 9, 11:45 PM CDT | Severe Thunderstorm Warning | OUN | Grant | 21 min |
| Jun 10, 2:25 AM CDT | Severe Thunderstorm Warning | OUN | Grant | 50 min |
| Jun 10, 2:39 PM CDT | Severe Thunderstorm Warning | OUN | Oklahoma | 36 min |
| Jun 10, 3:13 PM CDT | Severe Thunderstorm Warning | OUN | Logan, Oklahoma | 47 min |
| Jun 10, 4:22 PM CDT | Severe Thunderstorm Warning | OUN | Logan | 38 min |
| Jun 10, 6:09 PM CDT | Severe Thunderstorm Warning | OUN | Grady | 51 min |
| Jun 10, 6:27 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, McClain | 48 min |
| Jun 10, 6:38 PM CDT | Severe Thunderstorm Warning | OUN | Oklahoma | 52 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2007Every severe thunderstorm warning in 2007
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.