Alert archive / Oklahoma / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 264
The Storm Prediction Center issued this severe thunderstorm watch at May 9, 2002, 1:15 AM CDT for 5 counties in Arkansas; 16 counties in Oklahoma. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 9, 2002, 1:15 AM CDT (06:15 UTC)
- Expired
- May 9, 2002, 6:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 21 counties
Crawford County, AR, Franklin County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Coal County, OK, Creek County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Seminole County, OK, Sequoyah County, OK, Wagoner County, OK
The radar
The Tulsa radar (KINX), 86 km from the middle of the area, began a volume at 06:17 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.
Warnings issued inside it
10 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| 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, 2:45 AM CDT | Severe Thunderstorm Warning | TSA | Benton, Washington | 45 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 |
| May 9, 3:35 AM CDT | Tornado Warning | TSA | Crawford, Sebastian | 55 min |
| May 9, 4:05 AM CDT | Severe Thunderstorm Warning | LZK | Logan, Scott | 55 min |
| May 9, 4:09 AM CDT | Severe Thunderstorm Warning | TSA | Franklin | 66 min |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 6.3 hours before the alert went out and 173 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 WWUS20 KWNS 090602 SEL4 SPC WW 090558 ARZ000-OKZ000-091100- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 264 STORM PREDICTION CENTER NORMAN OK 1258 AM CDT THU MAY 9 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WESTERN ARKANSAS EASTERN OKLAHOMA EFFECTIVE THIS THURSDAY MORNING FROM 115 AM UNTIL 600 AM CDT. HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF MCALESTER OKLAHOMA TO 35 MILES EAST OF FORT SMITH ARKANSAS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES TORNADO WATCH NUMBER 261. WATCH NUMBER 261 WILL NOT BE IN EFFECT AFTER 115 AM CDT. CONTINUE...WW 263... DISCUSSION...STRONG OUTFLOW BOUNDARY/COLD FRONT WILL CONTINUE SURGING SWD ACROSS ERN OK/WRN AR...INTO MODERATELY UNSTABLE AIR MASS. GIVEN THE STRONG INFLOW AND DEGREE OF INSTABILITY...A FEW SEVERE THUNDERSTORMS PRODUCING HAIL AND/OR WIND DAMAGE WILL REMAIN POSSIBLE OVERNIGHT. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 29040. ...EVANS 343,0934 342,0964 355,0964 360,0934 WWUS20 KWNS 090602 SEL4 SPC WW 090558 ARZ000-OKZ000-091100- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 264 STORM PREDICTION CENTER NORMAN OK 1258 AM CDT THU MAY 9 2002 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF WESTERN ARKANSAS EASTERN OKLAHOMA EFFECTIVE THIS THURSDAY MORNING FROM 115 AM UNTIL 600 AM CDT. HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 55 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 55 MILES WEST NORTHWEST OF MCALESTER OKLAHOMA TO 35 MILES EAST OF FORT SMITH ARKANSAS. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES TORNADO WATCH NUMBER 261. WATCH NUMBER 261 WILL NOT BE IN EFFECT AFTER 115 AM CDT. CONTINUE...WW 263... DISCUSSION...STRONG OUTFLOW BOUNDARY/COLD FRONT WILL CONTINUE SURGING SWD ACROSS ERN OK/WRN AR...INTO MODERATELY UNSTABLE AIR MASS. GIVEN THE STRONG INFLOW AND DEGREE OF INSTABILITY...A FEW SEVERE THUNDERSTORMS PRODUCING HAIL AND/OR WIND DAMAGE WILL REMAIN POSSIBLE OVERNIGHT. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 29040. ...EVANS 343,0934 342,0964 355,0964 360,0934
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 9, 4:45 AM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Conway, Desha, Faulkner, Garland, Grant and 12 more | 4 hr |
| May 8, 8:00 PM CDT | Severe Thunderstorm Watch | SPC | Ottawa | 6 hr |
| May 8, 9:00 PM CDT | Tornado Watch | SPC | Adair, Alfalfa, Blaine, Cherokee, Craig, Creek and 17 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Oklahoma, 2002Severe Thunderstorm Watches in Arkansas, 2002Every severe thunderstorm watch 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.