Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 421, NWS Tulsa, OK

October 10, 2001McIntosh County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Oct 10, 2001, 2:04 PM CDT for McIntosh County, Oklahoma. It was in force for 56 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: Oct 10, 2001, 2:04 PM CDT (19:04 UTC)
Expired: Oct 10, 2001, 3:00 PM CDT
In force: 56 min
Issued by: NWS Tulsa, OK
Area: Whole counties

County McIntosh County, OK

The radar

The Tulsa radar (KINX), 90 km from the middle of the area, began a volume at 19:05 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
Oct 10, 2:30 PM CDT	Thunderstorm Wind 52 E	Checotah, 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 nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 7.1 hours before the alert went out and 158 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: 2191 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 556 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 296 m²/s²
0-3 km storm-relative helicity: 298 m²/s²
Significant tornado parameter: 2.7
Supercell composite: 14.9

Open this sounding in Storm Lab

The text

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

284 
WUUS54 KTSA 101905
SVRTUL
OKC091-102000-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
204 PM CDT WED OCT 10 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MCINTOSH COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 300 PM CDT

* AT 204 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 13 MILES NORTHWEST OF STIDHAM TO 2 MILES
  NORTH OF VIVIAN TO 9 MILES SOUTH OF RAIFORD...MOVING NORTHEAST AT
  25 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...EUFAULA...
  CHECOTAH...RAIFORD...VIVIAN...STIDHAM AND RENTIESVILLE.

HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN
THE WARNED AREA.

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.

$$

DRM

LAT...LON 3552 9586 3529 9582 3513 9593 3531 9543
          3541 9534 3559 9538

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 10, 2:13 PM CDT	Flash Flood Warning	TSA	Okfuskee, Okmulgee	4 hr
Oct 10, 2:46 PM CDT	Severe Thunderstorm Warning	TSA	Muskogee	44 min
Oct 10, 3:07 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	53 min
Oct 10, 3:47 PM CDT	Severe Thunderstorm Warning	TSA	Adair	60 min
Oct 10, 4:00 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	60 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001 Every severe thunderstorm warning in 2001

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.