Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 49, NWS Tulsa, OK

April 11, 2001McIntosh County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 11, 2001, 6:14 AM CDT for McIntosh County, Oklahoma. It was in force for 46 min. 3 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Apr 11, 2001, 6:14 AM CDT (11:14 UTC)
Expired
Apr 11, 2001, 7:00 AM CDT
In force
46 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County McIntosh County, OK

What was reported inside it

TimeReportWhereRemark
Apr 11, 6:15 AM CDTThunderstorm Wind 52 ECanadian, OK
Apr 11, 6:30 AM CDTThunderstorm WindGowen, OKThunderstorm winds damaged a barn.
Apr 11, 6:58 AM CDTThunderstorm WindChecotah, OKThunderstorm winds destroyed three mobile homes.

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 watch it was issued in

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

IssuedProductOfficeLasted
Apr 11, 3:15 AM CDTTornado WatchSPC5 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 11.2 hours before the alert went out and 162 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, Norman, OK at 00:00Z on 2001-04-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1767 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, Norman, OK at 00:00Z on 2001-04-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 square meters per square second.1939587897117136Sfc1 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
1767 J/kg
Mixed-layer CIN
-45 J/kg
Mixed-layer LCL
678 m above ground
0-6 km bulk shear
63 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
192 m²/s²
Significant tornado parameter
1.0
Supercell composite
3.8

Open this sounding in Storm Lab

The text

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

003 
WUUS54 KTSA 111115
SVRTUL
OKC061-077-091-121-111200-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
614 AM CDT WED APR 11 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN HASKELL COUNTY IN SOUTHEAST OKLAHOMA
  WESTERN LATIMER COUNTY IN SOUTHEAST OKLAHOMA
  MCINTOSH COUNTY IN SOUTHEAST OKLAHOMA
  EASTERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 700 AM CDT

* AT 614 AM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 4 MILES SOUTHEAST OF HANNA TO 3 MILES
  SOUTHWEST OF BLOCKER TO 15 MILES SOUTHWEST OF HARTSHORNE...MOVING
  NORTHEAST AT 45 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...CANADIAN...
  INDIANOLA...QUINTON...CROWDER...BLOCKER...ALDERSON...HARTSHORNE...
  STIDHAM...VIVIAN...RAIFORD...HANNA...CHECOTAH...EUFAULA...DAMON...
  HIGGINS...WILBURTON...ENTERPRISE AND KINTA.

WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA.

A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS.

LAT...LON 3516 9602 3501 9569 3452 9578 3490 9520
          3526 9526 3555 9545

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 11, 5:22 AM CDTSevere Thunderstorm WarningTSAMcIntosh, Pittsburg53 min
Apr 11, 5:22 AM CDTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee53 min
Apr 11, 5:55 AM CDTSevere Thunderstorm WarningTSAChoctaw, Pushmataha50 min
Apr 11, 6:14 AM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, Pittsburg46 min
Apr 11, 6:40 AM CDTSevere Thunderstorm WarningTSAChoctaw, Pushmataha65 min
Apr 11, 6:53 AM CDTSevere Thunderstorm WarningTSAHaskell, Muskogee, Sequoyah52 min
Apr 11, 6:53 AM CDTSevere Thunderstorm WarningTSAMcIntosh52 min
Apr 11, 6:53 AM CDTSevere Thunderstorm WarningTSALatimer52 min
Apr 11, 7:20 AM CDTSevere Thunderstorm WarningTSAMayes, Wagoner40 min
Apr 11, 7:26 AM CDTSevere Thunderstorm WarningTSALeFlore64 min
Apr 11, 7:28 AM CDTTornado WarningTSAHaskell, Sequoyah47 min
Apr 11, 7:33 AM CDTSevere Thunderstorm WarningTSACherokee27 min
Apr 11, 7:44 AM CDTSevere Thunderstorm WarningTSASequoyah46 min
Apr 11, 7:53 AM CDTSevere Thunderstorm WarningTSAAdair, Cherokee, Delaware52 min
Apr 11, 7:53 AM CDTSevere Thunderstorm WarningTSACraig, Mayes, Ottawa52 min
Apr 11, 8:27 AM CDTSevere Thunderstorm WarningTSALeFlore63 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2001Every 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.