Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 418, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Jun 12, 2001, 10:23 PM CDT for Major County, Oklahoma. It was in force for 52 min. 1 report 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
- Jun 12, 2001, 10:23 PM CDT (03:23 UTC)
- Expired
- Jun 12, 2001, 11:15 PM CDT
- In force
- 52 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Major County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 12, 10:30 PM CDT | Thunderstorm Wind | Cedar Spgs, OK | Six-inch diameter tree limbs were downed. |
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 nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 3.4 hours before the alert went out and 159 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
- 2981 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1565 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 54 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.9
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 Jun 12, 9:20 PM CDT, 1 hour 3 minutes earlier.
Area forecast discussion, Jun 12, 9:20 PM CDT, 1 hour 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 920 PM CDT TUE JUN 12 2001 LINE OF THUNDERSTORMS HAS CONTINUED TO PERSIST AND PUSH EAST DESPITE DECENT CAPPING INVERSION ON THE 00Z OUN SOUNDING. THE CONVECTION SHOULD WEAKEN AS IT MOVES EAST INTO THE STRONGER CAP. THERE HAS BEEN A SLIGHT DECREASE IN MID LEVEL INTENSITIES IN THE NORTH... BUT NOT AS MUCH AS I HAD HOPED FOR BY NOW. HAVE UPDATED ZONES TO EXTEND POPS FARTHER EAST IN CASE THE SHORTWAVE IS ABLE TO HELP THESE STORMS CONTINUE FARTHER THAN EXPECTED. THESE UPDATED ZONES ARE ALREADY OUT. .26. .OUN... OK...NONE. TX...NONE.
In the hours before
Local storm report, Jun 12, 9:59 PM CDT, 24 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
959 PM CDT TUE JUN 12 2001
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0952 PM 6 W ELDORADO OK .88 INCH HAIL
06/12/01 JACKSON AMATEUR RADIO REPORT
0955 PM AVARD OK 60 MPH WIND GUST
06/12/01 WOODS ESTIMAWTED BY PUBLIC
KTThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 7:28 PM CDT | Severe Thunderstorm Warning | OUN | Ellis | 62 min |
| Jun 12, 9:46 PM CDT | Severe Thunderstorm Warning | OUN | Harmon, Jackson | 44 min |
| Jun 12, 9:49 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 41 min |
| Jun 12, 10:13 PM CDT | Severe Thunderstorm Warning | OUN | Washita | 47 min |
| Jun 12, 10:14 PM CDT | Severe Thunderstorm Warning | OUN | Alfalfa | 31 min |
| Jun 13, 12:22 AM CDT | Severe Thunderstorm Warning | OUN | Comanche, Tillman | 38 min |
| Jun 13, 1:01 AM CDT | Severe Thunderstorm Warning | OUN | Comanche | 44 min |
| Jun 13, 1:40 AM CDT | Severe Thunderstorm Warning | OUN | Grady, Stephens | 65 min |
| Jun 13, 2:59 AM CDT | Severe Thunderstorm Warning | OUN | Garvin | 46 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.