Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 115, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 8, 2002, 11:00 PM CDT for Pawnee County, Oklahoma. It was in force for 60 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
- May 8, 2002, 11:00 PM CDT (04:00 UTC)
- Expired
- May 9, 2002, 12:00 AM CDT
- In force
- 60 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Pawnee County, OK
The radar
The Tulsa radar (KINX), 103 km from the middle of the area, began a volume at 04:03 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 8, 11:15 PM CDT | Hail 0.88 | Ralston, 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 8, 9:00 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 4.0 hours before the alert went out and 137 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
- 3758 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 901 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 232 m²/s²
- 0-3 km storm-relative helicity
- 265 m²/s²
- Significant tornado parameter
- 5.8
- Supercell composite
- 21.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 090400 SVRTUL OKC117-090500- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1059 PM CDT WED MAY 8 2002 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PAWNEE COUNTY IN NORTHEAST OKLAHOMA * UNTIL MIDNIGHT CDT * AT 1059 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES WEST OF PAWNEE...MOVING EAST AT 45 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...PAWNEE... BLACKBURN...SKEDEE...CLEVELAND AND RALSTON. HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. A TORNADO WATCH IS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. $$ MANNING LAT...LON 3647 9707 3628 9693 3629 9645 3655 9676
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 8, 9:15 PM CDT, 1 hour 45 minutes earlier.
Area forecast discussion, May 8, 9:15 PM CDT, 1 hour 45 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OKLAHOMA 915 PM CDT WED MAY 8 2002 RUNNING A BIT BEHIND WITH ONGOING WEATHER AND GFE PROBLEMS. SE KS CONVECTION HAS RACED OUT AHEAD OF COLD FRONT...WITH WELL-DEFINED OUTFLOW BOUNDARY PUSHING INTO OUR FAR NRN COUNTIES AT THIS TIME. ADDITIONAL SEVERE CONVECTION JUST TO THE W OF OUR NWRN CWA CONTINUES ALONG COLD FRONT. 00Z OUN SOUNDING WAS QUITE IMPRESSIVE WITH NEARLY 4000 J/KG OF CAPE AND JUST A SLIVER OF A CAP LEFT. EXPECT THIS ACTIVITY TO GRADUALLY BECOME MORE LINEAR WITH TIME...AND EVENTUALLY DEVELOP INTO A MCS OVERNIGHT. PROGGD CORFIDI VECTORS SUGGEST MCS WILL PEEL ESE INTO FAR NE OK AND EVENTUALLY NW AR LATER TONIGHT. WILL UPDATE TO TWEAK POPS SOME...AND ADJUST TIMING OF CONVECTION. UPDATE SHOULD BE OUT BETWEEN 930 AND 945 PM. .TSA... AR...NONE. OK...NONE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 9:33 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 57 min |
| May 8, 10:04 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 56 min |
| May 8, 10:26 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 64 min |
| May 8, 11:15 PM CDT | Flash Flood Warning | TSA | Osage | 4 hr |
| May 8, 11:23 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 52 min |
| May 8, 11:27 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 93 min |
| May 8, 11:40 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware | 65 min |
| May 8, 11:50 PM CDT | Severe Thunderstorm Warning | TSA | Rogers | 55 min |
| May 9, 12:00 AM CDT | Severe Thunderstorm Warning | TSA | Nowata | 60 min |
| May 9, 12:14 AM CDT | Severe Thunderstorm Warning | TSA | Washington | 46 min |
| May 9, 12:20 AM CDT | Severe Thunderstorm Warning | TSA | Craig | 55 min |
| May 9, 12:29 AM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 61 min |
| May 9, 12:32 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 43 min |
| May 9, 12:44 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Creek | 61 min |
| May 9, 1:06 AM CDT | Severe Thunderstorm Warning | TSA | Rogers | 54 min |
| May 9, 1:12 AM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 63 min |
| May 9, 1:30 AM CDT | Severe Thunderstorm Warning | TSA | Okmulgee, Tulsa, Wagoner | 45 min |
| May 9, 2:09 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee, Okmulgee, Wagoner | 51 min |
| May 9, 2:49 AM CDT | Tornado Warning | TSA | Muskogee | 41 min |
| May 9, 3:03 AM CDT | Tornado Warning | TSA | Sequoyah | 57 min |
| May 9, 3:05 AM CDT | Severe Thunderstorm Warning | TSA | Haskell | 40 min |
| May 9, 3:23 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 67 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.