Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 367, NWS Tulsa, OK

September 7, 2001Osage County, Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Sep 7, 2001, 7:38 PM CDT for Osage County, Washington County, Oklahoma. It was in force for 52 min. 5 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
Sep 7, 2001, 7:38 PM CDT (00:38 UTC)
Expired
Sep 7, 2001, 8:30 PM CDT
In force
52 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Osage County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 80 km from the middle of the area, began a volume at 00:50 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
Sep 7, 7:45 PM CDTThunderstorm Wind 63 MWynona, OK
Sep 7, 7:50 PM CDTHail 0.75Maramec, OK
Sep 7, 8:00 PM CDTThunderstorm Wind 61 EBartlesville, OK
Sep 7, 8:10 PM CDTThunderstorm Wind 52 EWann, OK
Sep 7, 8:15 PM CDTThunderstorm Wind 52 MCopan, 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 watch it was issued in

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

IssuedProductOfficeLasted
Sep 7, 3:15 PM CDTTornado WatchSPC6 hr
Sep 7, 7:00 PM CDTTornado WatchSPC5 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 0.6 hours before the alert went out and 112 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, Lamont, OK at 00:00Z on 2001-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 263 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, Lamont, OK at 00:00Z on 2001-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -133 square meters per square second.19395878Sfc1 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
263 J/kg
Mixed-layer CIN
-214 J/kg
Mixed-layer LCL
1305 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
-133 m²/s²
0-3 km storm-relative helicity
-52 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.8

Open this sounding in Storm Lab

The text

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

458 
WUUS54 KTSA 080038
SVRTUL
OKC113-117-147-080130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
738 PM CDT FRI SEP 7 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR
  EASTERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
  EASTERN PAWNEE COUNTY IN NORTHEAST OKLAHOMA
  WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 830 PM CDT

* AT 736 PM CDT SEVERE THUNDERSTORMS CAPABLE OF PRODUCING WINDS UP TO
  70 MPH WERE LOCATED ALONG A LINE EXTENDING FROM 9 MILES NORTHWEST  
  OF HULAH TO 6 MILES WEST OF OKESA TO 3 MILES SOUTHEAST OF          
  MARAMEC...MOVING EAST AT 40 MPH.

* SOME LOCATIONS AFFECTED INCLUDE... WESTPORT...CLEVELAND...
  BLACKBURN...MARAMEC...HALLETT...TERLTON...COPAN...DEWEY...
  OCHELATA...BARTLESVILLE...SKIATOOK...HULAH...BIGHEART...OKESA...
  BARNSDALL...WYNONA...AVANT...HOMINY...OSAGE AND PAWHUSKA.

STORM SPOTTERS HAVE REPORTED WINDS OF 60 TO 70 MPH IN HOMINY WITH 
THESE STORMS.

DAMAGING WINDS ARE LIKELY WITH THESE STORMS...MOVE TO A SAFE PLACE
NOW.

IN ADDITION TO DAMAGING WINDS...LARGE HAIL TO THE SIZE OF GOLF BALLS
IS ALSO LIKELY WITH THESE STORMS.

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

LAT...LON 3701 9629 3667 9645 3618 9680 3619 9603
          3652 9594 3701 9576

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 7:27 PM CDTSevere Thunderstorm WarningTSACreek63 min
Sep 7, 7:38 PM CDTSevere Thunderstorm WarningTSAPawnee52 min
Sep 7, 7:59 PM CDTSevere Thunderstorm WarningTSANowata61 min
Sep 7, 8:03 PM CDTSevere Thunderstorm WarningTSACreek, Tulsa57 min
Sep 7, 8:03 PM CDTSevere Thunderstorm WarningTSARogers57 min
Sep 7, 8:10 PM CDTSevere Thunderstorm WarningTSAOkfuskee50 min
Sep 7, 8:22 PM CDTSevere Thunderstorm WarningTSACraig38 min
Sep 7, 8:39 PM CDTSevere Thunderstorm WarningTSAOkmulgee, Wagoner51 min
Sep 7, 8:55 PM CDTSevere Thunderstorm WarningTSATulsa35 min
Sep 7, 8:57 PM CDTSevere Thunderstorm WarningTSACraig, Mayes, Rogers63 min
Sep 7, 8:57 PM CDTSevere Thunderstorm WarningTSAOttawa63 min
Sep 7, 8:57 PM CDTSevere Thunderstorm WarningTSAOkfuskee33 min
Sep 7, 9:13 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee62 min
Sep 7, 9:13 PM CDTSevere Thunderstorm WarningTSAWagoner62 min
Sep 7, 9:39 PM CDTSevere Thunderstorm WarningTSAOkfuskee66 min
Sep 7, 9:40 PM CDTSevere Thunderstorm WarningTSADelaware65 min
Sep 7, 9:41 PM CDTSevere Thunderstorm WarningTSACherokee64 min
Sep 7, 10:11 PM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee, Okmulgee64 min
Sep 7, 10:14 PM CDTSevere Thunderstorm WarningTSAAdair61 min
Sep 7, 10:30 PM CDTSevere Thunderstorm WarningTSAPittsburg60 min
Sep 7, 10:39 PM CDTSevere Thunderstorm WarningTSAHaskell66 min
Sep 7, 10:54 PM CDTSevere Thunderstorm WarningTSACherokee, Sequoyah, Wagoner66 min
Sep 7, 10:59 PM CDTSevere Thunderstorm WarningTSAPittsburg46 min
Sep 7, 11:13 PM CDTSevere Thunderstorm WarningTSAMcIntosh47 min
Sep 7, 11:24 PM CDTSevere Thunderstorm WarningTSAAdair51 min
Sep 7, 11:31 PM CDTSevere Thunderstorm WarningTSALatimer, Pushmataha59 min
Sep 7, 11:42 PM CDTSevere Thunderstorm WarningTSAHaskell, LeFlore, Sequoyah63 min
Sep 8, 12:19 AM CDTSevere Thunderstorm WarningTSAChoctaw, Pushmataha56 min
Sep 8, 1:15 AM CDTSevere Thunderstorm WarningTSALeFlore60 min
Sep 8, 3:41 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer64 min
Sep 8, 3:50 PM CDTSevere Thunderstorm WarningTSAPittsburg55 min
Sep 8, 4:45 PM CDTSevere Thunderstorm WarningTSALatimer60 min
Sep 8, 5:18 PM CDTSevere Thunderstorm WarningTSAPushmataha57 min
Sep 8, 5:30 PM CDTSevere Thunderstorm WarningTSALeFlore60 min
Sep 8, 6:09 PM CDTSevere Thunderstorm WarningTSALatimer66 min
Sep 8, 6:14 PM CDTFlash Flood WarningTSALatimer3 hr
Sep 8, 6:30 PM CDTSevere Thunderstorm WarningTSALeFlore60 min
Sep 8, 6:43 PM CDTSevere Thunderstorm WarningTSAPushmataha62 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; radar from the NEXRAD Level II archive.