Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 242, NWS Tulsa, OK

April 30, 2006Cherokee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 30, 2006, 10:12 PM CDT for Cherokee County, Oklahoma. It was in force for 37 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, 10:12 PM CDT (03:12 UTC)
Expired: Apr 30, 2006, 10:49 PM CDT
In force: 37 min
Issued by: NWS Tulsa, OK
Area: Counties, with a storm outline in the text

County Cherokee County, OK

The radar

The Tulsa radar (KINX), 59 km from the middle of the area, began a volume at 03:14 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.

Issued	Product	Office	Lasted
Apr 30, 3:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.2 hours before the alert went out and 154 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: 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 27 minutes earlier.

Area forecast discussion, Apr 30, 8:45 PM CDT, 1 hour 27 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, 37 minutes before

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In the hours before

Local storm report, Apr 30, 9:07 PM CDT, 1 hour 5 minutes before

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Special weather statement, Apr 30, 9:22 PM CDT, 50 minutes before

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Local storm report, Apr 30, 9:32 PM CDT, 40 minutes before

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Local storm report, Apr 30, 9:49 PM CDT, 23 minutes before

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Local storm report, Apr 30, 9:57 PM CDT, 15 minutes before

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Local storm report, Apr 30, 10:11 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1011 PM CDT SUN APR 30 2006

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

1007 PM     HAIL             CHOUTEAU                36.19N 95.34W
04/30/2006  E0.75 INCH       MAYES              OK   EMERGENCY MNGR

1002 PM     HAIL             3 N CHOUTEAU            36.23N 95.34W
04/30/2006  E1.00 INCH       MAYES              OK   EMERGENCY MNGR

&&

BAS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 7:03 PM CDT	Severe Thunderstorm Warning	TSA	Mayes, Wagoner	57 min
Apr 30, 7:30 PM CDT	Severe Thunderstorm Warning	TSA	Cherokee	60 min
Apr 30, 7:53 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Delaware	82 min
Apr 30, 7:58 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa	36 min
Apr 30, 8:02 PM CDT	Severe Thunderstorm Warning	TSA	Osage	58 min
Apr 30, 8:56 PM CDT	Severe Thunderstorm Warning	TSA	Wagoner	15 min
Apr 30, 8:59 PM CDT	Severe Thunderstorm Warning	TSA	Osage	31 min
Apr 30, 9:02 PM CDT	Severe Thunderstorm Warning	TSA	Tulsa, Washington	43 min
Apr 30, 9:19 PM CDT	Severe Thunderstorm Warning	TSA	Rogers	56 min
Apr 30, 9:49 PM CDT	Severe Thunderstorm Warning	TSA	Mayes	40 min
Apr 30, 8:49 PM CDT	Severe Thunderstorm Warning	TSA	Crawford	56 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2006 Every 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.