Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 12, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Feb 9, 2001, 2:45 AM CST for Bryan County, Oklahoma. It was in force for 30 min. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Feb 9, 2001, 2:45 AM CST (08:45 UTC)
- Expired
- Feb 9, 2001, 3:15 AM CST
- In force
- 30 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Bryan County, OK
The radar
The Norman radar (KTLX), 179 km from the middle of the area, began a volume at 08:46 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 was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 9, 2:45 AM CST | Thunderstorm Wind | Colbert, OK | Four mobile homes and nine barns were destroyed by high winds. |
| Feb 9, 2:55 AM CST | Thunderstorm Wind | Calera, OK | Four barns were destroyed, and siding was blown off a mobile home. |
| Feb 9, 3:00 AM CST | Thunderstorm Wind | Durant, OK | A tractor-trailer overturned on Highway 70, on the east end of the Roosevelt bridge. The driver was injured and taken to a local hospital. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Feb 8, 11:00 PM CST | Tornado Watch | SPC | 6 hr |
| Feb 9, 2:45 AM CST | Tornado Watch | SPC | 4 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 8.8 hours before the alert went out and 158 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
- 553 J/kg
- Mixed-layer CIN
- -32 J/kg
- Mixed-layer LCL
- 793 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 243 m²/s²
- 0-3 km storm-relative helicity
- 314 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 5.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Feb 8, 10:05 PM CST, 4 hours 40 minutes earlier.
Area forecast discussion, Feb 8, 10:05 PM CST, 4 hours 40 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 1005 PM CST THU FEB 8 2001 MAIN CONCERN THIS EVENING HAS BEEN STEADY MOVEMENT OF SHALLOW ARCTIC AIR INTO NORTHWEST OKLAHOMA AND ASSOCIATED VARIETY OF PRECIP TYPES NORTH OF THE BOUNDARY. AS OF MID EVENING...COLD FRONT WAS LOCATED FROM NEAR STILLWATER SOUTHWESTWARD TO NEAR QUANAH TEXAS WITH TEMPERATURES ACROSS FAR NORTHWEST OKLAHOMA ALREADY INTO THE MID AND UPPER 20S. RECENT SURFACE OBS AND CALLS TO THAT AREA INDICATE A MIXTURE OF FREEZING RAIN...SLEET..AND SNOW...WITH OCCASIONAL RUMBLES OF THUNDER. GROUND TEMPERATURES ARE STILL WARM HOWEVER RELATIVE TO THE SURFACE AIR WHICH HAS GREATLY LIMITED SIGNIFICANT ACCCUMS OF ICE/SNOW FROM DEVELOPING. BACK EDGE OF DEEPEST MOISTURE AND STRONGEST SYNOPTIC SCALE LIFT IS JUST BEGINNING TO ENTER EXTREME WESTERN OKLAHOMA AT THIS TIME. COLD FRONT SHOULD ACCELERATE SOUTHEASTWARD AFTER MIDNIGHT AS UPPER LOW LIFTS OUT ALLOWING ARCTIC AIR TO MOVE FASTER AND FARTHER THAN EXPECTED INTO THE FORECAST AREA WITH SEVERAL HOURS OF SIGNIFICANT PRECIP TO FALL INTO SUB FREEZING AIR PARTICULARLY ACROSS NORTH CENTRAL OKLAHOMA. FOR THIS REASON RECENTLY UPDATED THE WINTER WEATHER ADVISORY TO INCLUDE NORTH CENTRAL OKLAHOMA AND A FEW MORE COUNTIES TO THE SOUTH. WOULD NOT BE SURPRISED TO SEE ICE PROBLEMS DEVELOP EVEN FARTHER SOUTH INTO THE AREA LATE TONIGHT/EARLY FRIDAY BUT WILL LEAVE THAT UP TO THE MIDNIGHT SHIFT TO DECIDE. SQUALL LINE ACROSS THE EASTERN TEXAS PANHANDLE SHOULD PICK UP EASTWARD SPEED AND PERHAPS INTENSITY AS IT ENCOUNTERS DEEPER MOISTURE OVER CENTRAL TEXAS. SEVERE THUNDERSTORM WATCH ALREADY IN EFFECT FOR PARTS OF SOUTHWEST OKLAHOMA AND WESTERN NORTH TEXAS FOR PRIMARILY LARGE HAIL AND SEVERE WIND GUSTS. UPDATES TO THE ZONES AND WINTER WEATHER ADVISORY HAVE ALREADY BEEN ISSUED. .OUN... OK...WINTER WEATHER ADVISORY TONIGHT OKZ004>018 TX...NONE. JAMESL
In the hours before
Local storm report, Feb 8, 11:54 PM CST, 2 hours 51 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1154 PM CST THU FEB 08 2001
TIME (CST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1130 PM 3 W MEDICINE PARK OK 68 MPH WIND GUST
02/08/01 COMANCHE RECORDED BY OKLAHOMA
MESONET
1130 PM 3 W GRANDFIELD OK 67 MPH WIND GUST
02/08/01 TILLMAN RECORDED BY OKLAHOMA
MESONET
1153 PM WICHITA FALLS TX 58 MPH WIND GUST
02/08/01f WICHITA RECORDED BY ASOS
KTLocal storm report, Feb 9, 12:18 AM CST, 2 hours 27 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1218 AM CST FRI FEB 09 2001
TIME (CST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1140 PM 3 W MEDICINE PARK OK 58 MPH WIND GUST
02/08/01 COMANCHE
1145 PM 3 W MEDICINE PARK OK 62 MPH WIND GUST
02/08/01 COMANCHE R
JLocal storm report, Feb 9, 12:28 AM CST, 2 hours 17 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
1228 AM CST FRI FEB 09 2001
TIME (CST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1200 AM 1 NW WALTERS OK 61 MPH WIND GUST
02/09/01 COTTON
1215 AM 6 MW MARLOW OK WIND DAMAGE
02/09/01 STEPHENS BARN AND TREES BLOWN
DOWN.
JSpecial weather statement, Feb 9, 12:57 AM CST, 1 hour 48 minutes before
OKZ037-044-TXZ085-086-088>090-090745- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE NORMAN OK 1257 AM CST FRI FEB 9 2001 ...TORNADO WATCH NUMBER 15 HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES IN OKLAHOMA AND NORTH TEXAS... IN OKLAHOMA...TILLMAN AND COTTON COUNTIES. IN TEXAS...WILBARGER...BAYLOR...WICHITA...ARCHER...AND CLAY COUNTIES. SEVERE THUNDERSTORMS HAVE MOVED EAST OF THESE COUNTIES AND NO ADDITIONAL SEVERE THUN(DERSTORM DEVELOPMENT IS EXPECTED.
Local storm report, Feb 9, 1:54 AM CST, 51 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
154 AM CST FRI FEB 09 2001
TIME (CST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0143 AM LONE GROVE OK WIND DAMAGE
02/09/01 CARTER ROOF DAMAGED
0148 AM ARDMORE OK WIND DAMAGE
02/09/01 CARTER ROOF DAMAGED
JLocal storm report, Feb 9, 2:44 AM CST, 1 minute before
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</html>The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 8, 11:35 PM CST | Severe Thunderstorm Warning | OUN | Comanche, Cotton, Tillman | 40 min |
| Feb 9, 12:03 AM CST | Severe Thunderstorm Warning | OUN | Jefferson | 42 min |
| Feb 9, 12:03 AM CST | Severe Thunderstorm Warning | OUN | Grady, Stephens | 42 min |
| Feb 9, 12:46 AM CST | Severe Thunderstorm Warning | OUN | Carter, Garvin, McClain, Stephens | 59 min |
| Feb 9, 12:46 AM CST | Severe Thunderstorm Warning | OUN | Jefferson | 59 min |
| Feb 9, 1:41 AM CST | Severe Thunderstorm Warning | OUN | Carter, Murray | 49 min |
| Feb 9, 2:03 AM CST | Severe Thunderstorm Warning | OUN | Johnston, Pontotoc | 42 min |
| Feb 9, 2:58 AM CST | Severe Thunderstorm Warning | OUN | Atoka | 32 min |
| Feb 8, 10:19 PM CST | Severe Thunderstorm Warning | OUN | Hardeman | 41 min |
| Feb 8, 10:35 PM CST | Severe Thunderstorm Warning | OUN | Foard, Knox, Wilbarger | 40 min |
| Feb 8, 11:05 PM CST | Severe Thunderstorm Warning | OUN | Baylor | 40 min |
| Feb 8, 11:35 PM CST | Severe Thunderstorm Warning | OUN | Archer, Wichita | 40 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2001Every severe thunderstorm warning in 2001
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.