Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 106, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 7, 2002, 3:10 PM CDT for Osage County, Oklahoma. It was in force for 50 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 7, 2002, 3:10 PM CDT (20:10 UTC)
- Expired
- May 7, 2002, 4:00 PM CDT
- In force
- 50 min
- Issued by
- NWS Tulsa, OK
- Area
- Counties, with a storm outline in the text
County Osage County, OK
The radar
The Wichita radar (KICT), 108 km from the middle of the area, began a volume at 20:09 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 7, 3:25 PM CDT | Hail 0.88 | Grainola, 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
Norman, OK (KOUN), launched 12:00Z, 8.2 hours before the alert went out and 194 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
- 1864 J/kg
- Mixed-layer CIN
- -269 J/kg
- Mixed-layer LCL
- 842 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 333 m²/s²
- 0-3 km storm-relative helicity
- 312 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 072010 SVRTUL OKC113-072100- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 310 PM CDT TUE MAY 7 2002 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWEST OSAGE COUNTY IN NORTHEAST OKLAHOMA * UNTIL 400 PM CDT * AT 309 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR SHIDLER...MOVING NORTHEAST AT 40 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...SHIDLER... FORAKER AND GRAINOLA. HAIL TO THE SIZE OF GOLF BALLS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. LAT...LON 3681 9687 3673 9671 3700 9641 3701 9671
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 7, 10:15 AM CDT, 4 hours 55 minutes earlier.
Area forecast discussion, May 7, 10:15 AM CDT, 4 hours 55 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1015 AM CDT TUE MAY 7 2002 CURRENTLY WATCHING CONVECTION ACROSS SE KS AND SW MO THIS MORNING. EXPECT CONVECTION TO WEAKEN AS THE MORNING PROGRESSES. OUTFLOW BOUNDARY ROUGHLY APPROACHING A KJLN-KSGF LINE WAS SLOWLY SAGGING SOUTH. WITH A FAIRLY STRONG CAP NOTED PER AREA SOUNDINGS...THINK CHANCES FOR SURFACE BASED CONVECTION THIS AFTERNOON ARE SLIM. HOW FAR SOUTH OUTFLOW BOUNDARY WILL MOVE REMAINS IN QUESTION...SO LOW POPS ACROSS NE OK AND NW AR LOOK REASONABLE. MAX TEMPERATURES LOOK GOOD FOR THIS AFTERNOON AS WELL...SO NO UPDATE IS PLANNED THIS MORNING. FCSTID = 23 .TSA... AR...NONE. OK...NONE.
In the hours before
Special weather statement, May 7, 1:20 PM CDT, 1 hour 50 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-081100- EASTERN OKLAHOMA / NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 120 PM CDT TUE MAY 7 2002 ...A SLIGHT CHANCE OF SEVERE THUNDERSTORMS TONIGHT ACROSS NORTHEAST OKLAHOMA AND EXTREME NORTHWEST ARKANSAS... ELEVATED THUNDERSTORMS CONTINUE ACROSS SOUTHWEST MISSOURI EARLY THIS AFTERNOON AND WERE MOVING EAST...WHILE ADDITIONAL ACTIVITY HAS DEVELOP ACROSS PORTIONS OF NORTH CENTRAL AND NORTHWEST OKLAHOMA...AND WAS MOVING NORTHEAST INTO SOUTH CENTRAL AND SOUTHEAST KANSAS. ADDITIONAL THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND EVENING ACROSS CENTRAL KANSAS NEAR A STATIONARY FRONT. THESE THUNDERSTORMS MAY PUSH INTO NORTHEAST OKLAHOMA AND EXTREME NORTHWEST ARKANSAS TONIGHT. A SECOND FOCUS FOR THUNDERSTORMS WILL BE THE DRYLINE SITUATED ACROSS WESTERN OKLAHOMA. STORMS THAT DEVELOP AND MOVE EAST OFF THE DRYLINE MAY ENTER NORTHEAST OKLAHOMA LATE TONIGHT. SOME OF THESE THUNDERSTORMS COULD BECOME SEVERE WITH DAMAGING WINDS THE PRIMARY THREAT. .SPOTTER ACTIVATION... SPOTTER ACTIVATION MAY BE REQUIRED OVER NORTHEAST OKLAHOMA AND FAR NORTHWEST ARKANSAS AFTER MIDNIGHT. .DISCUSSION... ONGOING SHOWERS AND THUNDERSTORMS ACROSS NORTHERN OKLAHOMA...SOUTHERN KANSAS AND SOUTHERN MISSOURI IS EXPECTED TO WEAKEN THIS AFTERNOON AS THE LOW AND MID LEVEL JET DYNAMICS SUBSIDE. THUNDERSTORMS ARE EXPECTED TO DEVELOP AGAIN BY LATE AFTERNOON ALONG A STATIONARY FRONT THAT EXTENDS FROM SOUTHWEST TO NORTHEAST ACROSS KANSAS. THUNDERSTORMS WILL MOST LIKELY EVOLVE INTO A MESOSCALE CONVECTIVE SYSTEM TONIGHT AND HEAD TO THE SOUTHEAST. THIS ACTIVITY WILL BE SUSTAINED AS A 55 KNOT LOW LEVEL JET IS REESTABLISHED ACROSS OKLAHOMA AND SOUTHWEST MISSOURI THIS EVENING. THUNDERSTORMS THAT DEVELOP ALONG THE DRYLINE ACROSS PARTS OF WESTERN OKLAHOMA WILL MOVE EAST....POSSIBLY MOVING INTO PARTS OF NORTHEAST OKLAHOMA AFTER MIDNIGHT. DAYTIME HEATING WILL BE HAMPERED ACROSS MUCH OF WESTERN OKLAHOMA BY EXTENSIVE MID AND HIGH LEVEL CLOUDS. THIS COMBINED WITH A FAIRLY STRONG CAP MAY LIMIT WIDESPREAD THUNDERSTORM DEVELOPMENT. THREAT TABLE VALID THROUGH 1200 UTC WEDNESDAY AREA 1...NORTH OF A BRISTOW TO WAGONER TO FAYETTEVILLE LINE THUNDERSTORM PROBABILITY...20 SEVERE PROBABILITY IF STORMS OCCUR...50 SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...05 THREAT AREAS DEFINE THE GREATEST RISK. PROBABILITIES ARE IN PERCENT. SIGNIFICANT SEVERE IS DEFINED AS F1 OR GREATER WIND/TORNADO DAMAGE AND/OR GOLFBALL SIZE HAIL OR LARGER. RELATED GRAPHICAL INFORMATION CAN BE FOUND AT: WWW.SRH.NOAA.GOV/TULSA
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 2:50 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 25 min |
| May 7, 3:52 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 53 min |
| May 7, 4:03 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 42 min |
| May 7, 4:11 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 64 min |
| May 7, 4:41 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 34 min |
| May 7, 5:46 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Ottawa | 59 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.