Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 92, NWS Tulsa, OK

May 5, 2002Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 5, 2002, 11:00 PM CDT for Washington County, Oklahoma. It was in force for 45 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 5, 2002, 11:00 PM CDT (04:00 UTC)
Expired
May 5, 2002, 11:45 PM CDT
In force
45 min
Issued by
NWS Tulsa, OK
Area
Counties, with a storm outline in the text

County Washington County, OK

The radar

The Tulsa radar (KINX), 57 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

TimeReportWhereRemark
May 5, 11:05 PM CDTHail 0.75Ochelata, 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, 4.0 hours before the alert went out and 193 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.

Skew-T log-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 2002-05-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 303 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2002-05-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 195 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
303 J/kg
Mixed-layer CIN
-148 J/kg
Mixed-layer LCL
1379 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
195 m²/s²
0-3 km storm-relative helicity
270 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.8

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KTSA 060400
SVRTUL
OKC147-060445-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1100 PM CDT SUN MAY 5 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1145 PM CDT

* AT 1100 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 9
  MILES WEST OF RAMONA...MOVING NORTHEAST AT 35 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...RAMONA AND
  OCHELATA.

HAIL TO THE SIZE OF QUARTERS CAN BE EXPECTED IN THE WARNED AREA. 
STAY INDOORS AND AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

LAT...LON 3665 9602 3644 9601 3647 9583 3675 9580

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 5, 11:00 PM CDT, 0 minutes earlier.

Area forecast discussion, May 5, 11:00 PM CDT, 0 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1100 PM CDT SUN MAY 5 2002

JUST SENT A QUICK UPDATE TO ADD TORNADO WATCH TO OSAGE AND PAWNEE
COUNTIES UNTIL 3 AM.  NO OTHER CHANGES MADE AT THIS TIME.

HOWIESON
FCSTID = 44

.TSA...
AR...NONE.
OK...NONE.

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 5, 10:33 PM CDTSevere Thunderstorm WarningTSAOsage42 min
May 5, 11:08 PM CDTSevere Thunderstorm WarningTSANowata52 min
May 5, 11:11 PM CDTSevere Thunderstorm WarningTSAOsage49 min
May 5, 11:27 PM CDTSevere Thunderstorm WarningTSARogers48 min
May 6, 12:28 AM CDTSevere Thunderstorm WarningTSAOsage, Pawnee47 min
May 6, 1:52 AM CDTSevere Thunderstorm WarningTSACreek, Okmulgee, Tulsa53 min
May 6, 2:09 AM CDTSevere Thunderstorm WarningTSAWagoner51 min
May 6, 2:38 AM CDTSevere Thunderstorm WarningTSAOkmulgee52 min
May 6, 2:39 AM CDTSevere Thunderstorm WarningTSADelaware36 min
May 6, 2:47 AM CDTSevere Thunderstorm WarningTSACherokee43 min
May 6, 2:51 AM CDTSevere Thunderstorm WarningTSAMuskogee39 min
May 6, 3:01 AM CDTSevere Thunderstorm WarningTSAWagoner44 min
May 6, 3:20 AM CDTSevere Thunderstorm WarningTSACherokee, Muskogee55 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.