Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 1, NWS Tulsa, OK

February 9, 2001Okfuskee County, Okmulgee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Feb 9, 2001, 1:59 AM CST for Okfuskee County, Okmulgee County, Oklahoma. It was in force for 46 min. 2 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
Feb 9, 2001, 1:59 AM CST (07:59 UTC)
Expired
Feb 9, 2001, 2:45 AM CST
In force
46 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Okfuskee County, OK, Okmulgee County, OK

The radar

The Norman radar (KTLX), 91 km from the middle of the area, began a volume at 08:00 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
Feb 9, 2:05 AM CSTThunderstorm Wind 52 EOkemah, OK
Feb 9, 2:10 AM CSTThunderstorm WindOkmulgee, OKThunderstorm winds blew several mature trees down onto a road near Okmulgee State Park.

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 00:00Z, 8.0 hours before the alert went out and 106 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 2001-02-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 886 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 2001-02-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 232 square meters per square second.1939587897117Sfc1 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
886 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
590 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
232 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
1.0
Supercell composite
4.6

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 090759
SVRTUL
OKC107-111-090845-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
159 AM CST FRI FEB 9 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OKFUSKEE COUNTY IN EAST CENTRAL OKLAHOMA
  OKMULGEE COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 245 AM CST

* AT 159 AM CST...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
  A LINE EXTENDING FROM 3 MILES NORTHWEST OF PADEN TO 5 MILES SOUTH
  OF BEARDEN...MOVING NORTHEAST AT 50 MPH.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...BEGGS...
  PRESTON...MORRIS...SCHULTER...OKMULGEE...WELTY...OKFUSKEE...
  BOLEY...PADEN...CASTLE...PHAROAH...CLEARVIEW...BEARDEN AND OKEMAH.

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

LAT...LON 3559 9668 3522 9643 3559 9577 3587 9603
          3565 9629

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 Feb 8, 11:29 PM CST, 2 hours 30 minutes earlier.

Area forecast discussion, Feb 8, 11:29 PM CST, 2 hours 30 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1129 PM CST THU FEB 8 2001

WITH TEMPS ALREADY IN THE MID 30S OVER NRN OSAGE COUNTY...DECIDED TO
GO AHEAD WITH A WINTER WEATHER ADVISORY FOR OUR ZONES NW OF TUL.
WARM GROUND WILL GREATLY LIMIT ANY ICING ON ROADS...ALTHO A FEW
EXPOSED ROADWAYS MAY SEE SOME MINOR ACCUMULATIONS.

FCSTID = 18

.TUL...
AR...NONE.
OK...WINTER WEATHER ADVISORY THROUGH EARLY FRIDAY MORNING FOR ZONES
OKZ054>055...OKZ059.

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 9, 2:31 AM CSTSevere Thunderstorm WarningTSAOkmulgee, Tulsa, Wagoner44 min
Feb 9, 2:31 AM CSTSevere Thunderstorm WarningTSAMuskogee44 min
Feb 9, 3:01 AM CSTSevere Thunderstorm WarningTSAMayes29 min
Feb 9, 3:07 AM CSTSevere Thunderstorm WarningTSAChoctaw, Pushmataha53 min
Feb 9, 3:07 AM CSTSevere Thunderstorm WarningTSALatimer, Pittsburg53 min
Feb 9, 3:15 AM CSTSevere Thunderstorm WarningTSADelaware30 min
Feb 9, 3:25 AM CSTSevere Thunderstorm WarningTSAAdair, Cherokee50 min
Feb 9, 3:41 AM CSTSevere Thunderstorm WarningTSADelaware49 min
Feb 9, 3:56 AM CSTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore, Pushmataha64 min
Feb 9, 3:56 AM CSTSevere Thunderstorm WarningTSAChoctaw64 min
Feb 9, 4:11 AM CSTSevere Thunderstorm WarningTSASequoyah49 min
Feb 9, 4:15 AM CSTSevere Thunderstorm WarningTSAAdair60 min
Feb 9, 4:32 AM CSTSevere Thunderstorm WarningTSALeFlore, Sequoyah58 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.