Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 60, NWS Tulsa, OK

April 23, 2002Cherokee County, Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 23, 2002, 3:45 AM CDT for Cherokee County, Mayes County, Oklahoma. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 23, 2002, 3:45 AM CDT (08:45 UTC)
Expired: Apr 23, 2002, 4:30 AM CDT
In force: 45 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

Counties Cherokee County, OK, Mayes County, OK

The radar

The Tulsa radar (KINX), 43 km from the middle of the area, began a volume at 08:47 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 23, 2:30 AM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.8 hours before the alert went out and 145 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2397 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 203 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

596 
WUUS54 KTSA 230845
SVRTUL
OKC021-097-230930-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
344 AM CDT TUE APR 23 2002

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CHEROKEE COUNTY IN EAST CENTRAL OKLAHOMA
  MAYES COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 430 AM CDT

* AT 344 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5
  MILES SOUTH OF LOCUST GROVE...MOVING EAST AT 35 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...PEGGS...
  SCRAPER AND LOCUST GROVE.

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

ANOTHER STRONG TO SEVERE STORM WAS LOCATED 5 MILES SOUTHWEST OF 
ADAIR ALSO MOVING EAST AT 35 MPH.

LAT...LON 3622 9530 3605 9528 3595 9479 3615 9480

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 23, 2:43 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	47 min
Apr 23, 2:56 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes	34 min
Apr 23, 3:12 AM CDT	Severe Thunderstorm Warning	TSA	Osage	63 min
Apr 23, 3:37 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Washington	38 min
Apr 23, 4:09 AM CDT	Severe Thunderstorm Warning	TSA	Rogers, Washington	51 min
Apr 23, 4:50 AM CDT	Severe Thunderstorm Warning	TSA	Adair	40 min
Apr 23, 4:51 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	39 min
Apr 23, 5:52 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee	38 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2002 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.