Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 467, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Sep 18, 2002, 8:48 PM CDT for Blaine County, Custer County, Oklahoma. It was in force for 42 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
- Sep 18, 2002, 8:48 PM CDT (01:48 UTC)
- Expired
- Sep 18, 2002, 9:30 PM CDT
- In force
- 42 min
- Issued by
- NWS Norman, OK
- Area
- Counties, with a storm outline in the text
Counties Blaine County, OK, Custer County, OK
The radar
The Vance AFB radar (KVNX), 121 km from the middle of the area, began a volume at 01:49 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 18, 3:30 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Sep 18, 7:00 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.8 hours before the alert went out and 133 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
- 1558 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 1946 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.1
- 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 Sep 18, 3:48 PM CDT, 5 hours earlier.
Area forecast discussion, Sep 18, 3:48 PM CDT, 5 hours before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE NORMAN OK 348 PM CDT WED SEP 18 2002 WITH SURFACE FRONT AND UPPER SYSTEM APPROACHING... CHANCES LOOK GOOD FOR RAIN IN MOST AREAS TONIGHT. ALTHOUGH WE ARE STARTING OFF WITH A BIT OF A CAP TO OVERCOME... THINK THAT CAP WILL BE LESS OF AN ISSUE AS THE UPPER TROF MOVES TOWARD THE AREA. AM IMPRESSED WITH THE AMOUNT OF CONVECTION DEVELOPING IN NEW MEXICO AND WEST TEXAS AND WILL SEE HOW THINGS DEVELOP THIS EVENING AS THIS LIFT HITS BETTER MOISTURE OVER OKLAHOMA. WILL KEEP VERY HIGHS POPS MOST AREAS TONIGHT. THE MODELS HAVE BEEN SLOWING THE PROGRESS OF THE UPPER SYSTEM AND WITH LINGERING MOISTURE BEHIND THE FRONT HAVE INCREASED THE POPS THURSDAY AND INTO THURSDAY NIGHT. BUMPED MAX TEMPERATURES DOWN FOR FRIDAY AS 850 MB TEMPERATURES REMAIN COOL. MADE FEW CHANGES TO THE EXTENDED. ...SPEG. OKC 68 74 54 78 / 80 50 20 10 HBR 65 72 52 79 / 80 20 10 0 SPS 69 79 55 83 / 70 40 0 0 GAG 57 64 48 77 / 70 30 10 10 PNC 66 72 52 77 / 80 50 30 10 DUA 72 81 57 81 / 40 70 40 10 .OUN... OK...NONE. TX...NONE.
In the hours before
Local storm report, Sep 18, 7:46 PM CDT, 1 hour 2 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
746 PM CDT WED SEP 18 2002
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0730 PM JEFFERSON OK 60 MPH WIND GUST
09/18/02 GRANT NWS COOP OBSERVER
FMLocal storm report, Sep 18, 7:51 PM CDT, 57 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
751 PM CDT WED SEP 18 2002
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0725 PM 5 NE SEYMOUR TX 60 MPH WIND GUST
09/18/02 BAYLOR REPORTED BY AMATEUR RADIO.
0730 PM 5 NE SEYMOUR TX 60 MPH WIND GUST
09/18/02 BAYLOR REPORTED BY AMATEUR RADIO.
TYLocal storm report, Sep 18, 7:55 PM CDT, 53 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
755 PM CDT WED SEP 18 2002
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0725 PM 3 N PUTNAM OK 74 MPH WIND GUST
09/18/02 DEWEY REPORTED BY MESONET.
TYLocal storm report, Sep 18, 8:22 PM CDT, 26 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
822 PM CDT WED SEP 18 2002
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0720 PM 5 SW ANADARKO OK .88 INCH HAIL
09/18/02 CADDO PUBLIC REPORT
0815 PM ENID OK .75 INCH HAIL
09/18/02 GARFIELD AMATEUR RADIO SPOTTER
0816 PM BRAMAN OK .75 INCH HAIL
09/18/02 KAY AMATEUR RADIO SPOTTER
0820 PM ENID OK .88 INCH HAIL
09/18/02 GARFIELD PUBLIC REPORT
FMLocal storm report, Sep 18, 8:28 PM CDT, 20 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
828 PM CDT WED SEP 18 2002
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0828 PM 5 N MANKINS TX .75 INCH HAIL
09/18/02 ARCHER REPORTED BY AMATEUR RADIO
SPOTTER.
TYLocal storm report, Sep 18, 8:38 PM CDT, 10 minutes before
LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
838 PM CDT WED SEP 18 2002
TIME (CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0757 PM 4 NW BLACKWELL OK .75 INCH HAIL
09/18/02 KAY BLACKWELL EOC
0807 PM 1 N BRAMAN OK 1.75 INCH HAIL
09/18/02 KAY BLACKWELL EOC
0816 PM BRAMAN OK .75 INCH HAIL
09/18/02 KAY BLACKWELL EOC
0820 PM ENID OK .88 INCH HAIL
09/18/02 GARFIELD PUBLIC REPORT
0817 PM PONCA CITY OK 63 MPH WIND GUST
09/18/02 KAY PONCA CITY ASOS
FMThe office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 18, 7:11 PM CDT | Severe Thunderstorm Warning | OUN | Grant, Kay | 64 min |
| Sep 18, 7:13 PM CDT | Severe Thunderstorm Warning | OUN | Custer | 32 min |
| Sep 18, 7:31 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Major | 44 min |
| Sep 18, 7:55 PM CDT | Severe Thunderstorm Warning | OUN | Blaine, Dewey | 50 min |
| Sep 18, 8:01 PM CDT | Severe Thunderstorm Warning | OUN | Caddo, Canadian, Grady | 44 min |
| Sep 18, 8:12 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Grant, Kay, Major, Noble | 48 min |
| Sep 18, 8:30 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher | 45 min |
| Sep 18, 8:44 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 46 min |
| Sep 18, 9:02 PM CDT | Severe Thunderstorm Warning | OUN | Garfield, Kay, Noble | 58 min |
| Sep 18, 9:10 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher | 50 min |
| Sep 18, 9:22 PM CDT | Severe Thunderstorm Warning | OUN | Custer, Washita | 23 min |
| Sep 18, 9:24 PM CDT | Flash Flood Warning | OUN | Kay | 3 hr |
| Sep 18, 9:28 PM CDT | Severe Thunderstorm Warning | OUN | Canadian | 47 min |
| Sep 18, 9:36 PM CDT | Severe Thunderstorm Warning | OUN | Jackson | 39 min |
| Sep 18, 9:55 PM CDT | Severe Thunderstorm Warning | OUN | Kingfisher, Logan | 50 min |
| Sep 18, 10:01 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Oklahoma | 59 min |
| Sep 18, 10:13 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 47 min |
| Sep 18, 10:25 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 50 min |
| Sep 18, 10:37 PM CDT | Severe Thunderstorm Warning | OUN | Noble | 23 min |
| Sep 18, 10:58 PM CDT | Severe Thunderstorm Warning | OUN | Canadian, Oklahoma | 47 min |
| Sep 18, 11:08 PM CDT | Severe Thunderstorm Warning | OUN | Payne | 37 min |
| Sep 18, 11:18 PM CDT | Severe Thunderstorm Warning | OUN | Cleveland, Grady, McClain | 57 min |
| Sep 19, 6:09 AM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal, Johnston | 51 min |
| Sep 18, 7:28 PM CDT | Severe Thunderstorm Warning | OUN | Baylor | 47 min |
| Sep 18, 8:16 PM CDT | Severe Thunderstorm Warning | OUN | Archer | 44 min |
| Sep 18, 8:53 PM CDT | Severe Thunderstorm Warning | OUN | Wichita | 52 min |
| Sep 18, 10:32 PM CDT | Severe Thunderstorm Warning | OUN | Baylor, Knox | 28 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2002Every severe thunderstorm warning in 2002
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.