Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 88, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 2, 2002, 1:01 AM CDT for Adair County, Oklahoma. It was in force for 44 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 2, 2002, 1:01 AM CDT (06:01 UTC)
- Expired
- May 2, 2002, 1:45 AM CDT
- In force
- 44 min
- Issued by
- NWS Tulsa, OK
- Area
- Counties, with a storm outline in the text
County Adair County, OK
The radar
The Tulsa radar (KINX), 80 km from the middle of the area, began a volume at 06:00 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 |
|---|---|---|---|
| May 2, 1:20 AM CDT | Hail 0.88 | Baron, OK |
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.
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 nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 6.0 hours before the alert went out and 128 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
- 1175 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1882 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 020601 SVRTUL OKC001-020645- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 101 AM CDT THU MAY 2 2002 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... ADAIR COUNTY IN NORTHEAST OKLAHOMA * UNTIL 145 AM CDT * AT 101 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER PROCTOR...MOVING EAST AT 35 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...BARON... CHRISTIE...PROCTOR AND WESTVILLE. LAT...LON 3607 9481 3587 9481 3590 9453 3610 9456
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 Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at May 1, 9:49 PM CDT, 3 hours 12 minutes earlier.
Area forecast discussion, May 1, 9:49 PM CDT, 3 hours 12 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 949 PM CDT WED MAY 1 2002 SENT UPDATED ZONES TO REFLECT ADDITION OF TORNADO WATCH AND TO TWEAK POPS. STRONG TO SEVERE STORMS FIRING ALONG COLD FRONT IN NW AR AND HAVE BACKBUILD INTO SECTIONS OF FAR ERN OK. CURRENT THINKING IS STORMS WONT BUILD TOO MUCH MUCH FURTHER TO THE SW WITH INCREASING CAP STRENGTH PER KFWD SOUNDING. ZONE PACKAGE SENT AROUND 240Z FCSTID = 23 .TSA... AR...TORNADO WATCH UNTIL 2 AM THURSDAY ZONES ARZ001-002-010-011-019-020- OK...NONE.
In the hours before
Special weather statement, May 1, 8:20 PM CDT, 4 hours 41 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-021200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 820 PM CDT TUE MAY 1 2002 ...UPDATED FOR EVENING TRENDS... A COLD FRONT HAS BEEN MOVING SOUTH ACROSS THE PLAINS TODAY...AND HAS ENTERED NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS THIS EVENING. A FEW SEVERE THUNDERSTORMS HAD DEVELOPED ALONG THIS FRONT IN FAR SOUTHWEST MISSOURI AND MOVED EAST. ADDITIONAL THUNDERSTORM DEVELOPMENT WILL BE POSSIBLE JUST AHEAD OF THE FRONT ACROSS NORTHWEST ARKANSAS AND FAR EASTERN OKLAHOMA THIS EVENING. A FEW STORMS MAY BECOME SEVERE WITH LARGE HAIL THE PRIMARY THREAT. LOSS OF DAYTIME HEATING AND WEAK UPPER FORCING SHOULD CONFINE THE SEVERE THREAT TO THIS EVENING.
Local storm report, May 1, 8:52 PM CDT, 4 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
852 PM CDT WED MAY 1 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0835 PM SILOAM SPRINGS AR .75 INCH HAIL
05/01/02 BENTON REPORTED BY SPOTTERS
0843 PM SILOAM SPRINGS AR .88 INCH HAIL
05/01/02 BENTON REPORTED BY SPOTTERSThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 1, 8:29 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 46 min |
| May 1, 9:17 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 28 min |
| May 1, 9:28 PM CDT | Tornado Warning | TSA | Adair, Cherokee | 32 min |
| May 1, 11:26 PM CDT | Severe Thunderstorm Warning | TSA | Okmulgee, Tulsa | 49 min |
| May 1, 11:37 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 23 min |
| May 1, 11:49 PM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 41 min |
| May 2, 12:22 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 38 min |
| May 2, 12:51 AM CDT | Severe Thunderstorm Warning | TSA | Mayes | 24 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.