Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 241, NWS Tulsa, OK

April 30, 2006Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 30, 2006, 9:49 PM CDT for Mayes County, Oklahoma. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Apr 30, 2006, 9:49 PM CDT (02:49 UTC)
Expired
Apr 30, 2006, 10:29 PM CDT
In force
40 min
Issued by
NWS Tulsa, OK
Area
Counties, with a storm outline in the text

County Mayes County, OK

The radar

The Tulsa radar (KINX), 33 km from the middle of the area, began a volume at 02:49 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.

IssuedProductOfficeLasted
Apr 30, 3:55 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 2.8 hours before the alert went out and 144 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, Springfield, MO at 00:00Z on 2006-05-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 255 joules per kilogram.LCLEL10008507005003002001001 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, Springfield, MO at 00:00Z on 2006-05-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.1939587897Sfc1 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
255 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1790 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
156 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

Open this sounding in Storm Lab

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 Apr 30, 8:45 PM CDT, 1 hour 4 minutes earlier.

Area forecast discussion, Apr 30, 8:45 PM CDT, 1 hour 4 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
845 PM CDT SUN APR 30 2006

.DISCUSSION...

WATER VAPOR IMAGES CONFIRM H5 VORT MAX SHOWN BY MODELS. THIS VORT
MAX WAS SOUTH OF WICHITA AT 1Z AND SHOULD MOVE ACROSS TULSA TO NEAR
SILOAM SPRINGS BY 1 AM.  EXPECT CONVECTION TO REMAIN SOUTHEAST OF
THIS VORT MAX...SO EXPECT THE CONVECTION TO END OVER NORTHEAST
OKLAHOMA BY MIDNIGHT AND OVER NORTHWEST ARKANSAS A FEW HOURS AFTER
THAT.  AS SURFACE TEMPERATURES COOL...EXPECT AIRMASS TO BECOME MORE
STABLE AND SEVERITY OF STORMS TO LESSEN.

SECOND LINE OF STORMS HAS DEVELOPED JUST TO THE EAST OF CLAREMORE
INTO WESTERN WAGONER COUNTY.  EXPECT THESE STORMS TO CONTINUE TO THE
SOUTHEAST AND WILL MAKE SOME ADJUSTMENTS TO THE POPS FOR THIS.  PLAN
NO CHANGES TO TEMPS OVERNIGHT.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...NONE.
AR...NONE.
&&

SHORT TERM FORECASTER ID= 6
LONG TERM FORECASTER ID= 2
Hazardous weather outlook, Apr 30, 9:35 PM CDT, 14 minutes before
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In the hours before

Local storm report, Apr 30, 8:49 PM CDT, 1 hour before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
849 PM CDT SUN APR 30 2006

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 PM     TSTM WND DMG     2 S PEGGS               36.05N 95.10W
04/30/2006                   CHEROKEE           OK   EMERGENCY MNGR

            TREES DOWN

0813 PM     TSTM WND GST     1 N TAHLEQUAH           35.93N 94.97W
04/30/2006  E60.00 MPH       CHEROKEE           OK   TRAINED SPOTTER

0813 PM     HAIL             TULSA                   36.13N 95.92W
04/30/2006  E0.88 INCH       TULSA              OK   TRAINED SPOTTER

0821 PM     HAIL             PAWHUSKA                36.67N 96.34W
04/30/2006  E0.88 INCH       OSAGE              OK   LAW ENFORCEMENT

&&

PBS
Special weather statement, Apr 30, 9:01 PM CDT, 48 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
901 PM CDT SUN APR 30 2006

OKZ068-010230-
CHEROKEE OK-
901 PM CDT SUN APR 30 2006

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ALERT EFFECTIVE UNTIL 930 PM CDT
FOR THE FOLLOWING COUNTY:

IN EAST CENTRAL OKLAHOMA
     CHEROKEE

AT 901 PM CDT...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 12
MILES WEST OF HULBERT...MOVING EAST AT 40 MPH. SOME LOCATIONS THAT
WILL BE AFFECTED BY THIS STORM INCLUDE...TAHLEQUAH...HULBERT AND
ELDON.

THIS STORM WILL BE CAPABLE OF PRODUCING SMALL HAIL AND WIND GUSTS TO
40 MPH.
Local storm report, Apr 30, 9:07 PM CDT, 42 minutes before
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Special weather statement, Apr 30, 9:22 PM CDT, 27 minutes before
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Local storm report, Apr 30, 9:32 PM CDT, 17 minutes before
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Local storm report, Apr 30, 9:49 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 30, 7:03 PM CDTSevere Thunderstorm WarningTSAMayes, Wagoner57 min
Apr 30, 7:30 PM CDTSevere Thunderstorm WarningTSACherokee60 min
Apr 30, 7:53 PM CDTSevere Thunderstorm WarningTSAAdair, Delaware82 min
Apr 30, 7:58 PM CDTSevere Thunderstorm WarningTSATulsa36 min
Apr 30, 8:02 PM CDTSevere Thunderstorm WarningTSAOsage58 min
Apr 30, 8:56 PM CDTSevere Thunderstorm WarningTSAWagoner15 min
Apr 30, 8:59 PM CDTSevere Thunderstorm WarningTSAOsage31 min
Apr 30, 9:02 PM CDTSevere Thunderstorm WarningTSATulsa, Washington43 min
Apr 30, 9:19 PM CDTSevere Thunderstorm WarningTSARogers56 min
Apr 30, 10:12 PM CDTSevere Thunderstorm WarningTSACherokee37 min
Apr 30, 8:49 PM CDTSevere Thunderstorm WarningTSACrawford56 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2006Every severe thunderstorm warning in 2006

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.