Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 19, NWS Tulsa, OK

April 6, 20104 counties in Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 6, 2010, 11:24 PM CDT for 4 counties in Oklahoma. It was in force for 51 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 6, 2010, 11:24 PM CDT (04:24 UTC)
Expired
Apr 7, 2010, 12:15 AM CDT
In force
51 min
Issued by
NWS Tulsa, OK
Area
Storm-based polygon

Counties Nowata County, OK, Osage County, OK, Rogers County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 58 km from the middle of the area, began a volume at 04:24 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 6, 8:53 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 4.4 hours before the alert went out and 143 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 2010-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1675 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 2010-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 291 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
1675 J/kg
Mixed-layer CIN
-68 J/kg
Mixed-layer LCL
1732 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
291 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.7
Supercell composite
11.9

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 6, 9:39 PM CDT, 1 hour 45 minutes earlier.

Area forecast discussion, Apr 6, 9:39 PM CDT, 1 hour 45 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
939 PM CDT TUE APR 6 2010

.DISCUSSION...
RADAR SHOWS COLD FRONT APPROACHING OSAGE COUNTY.  LINE OF STORMS
HAS FORMED TO THE WEST AND NORTHWEST OF TULSA WITH THE FRONT
APPROACHING IT.  THESE STORMS COULD VERY WELL PROGRESS SOUTHEAST
ACROSS THE AREA AS THE SEVERE THUNDERSTORM WATCH SUGGESTS.
HAVE ADJUSTED THE POPS SLIGHTLY WITH AN INCREASE TO THE NORTHWEST
OF TULSA THIS EVENING AND TO THE SOUTHEAST AFTER MIDNIGHT.
FURTHER ADJUSTMENTS WITH A POSSIBLE UPTICK IN POPS AGAIN LATER
TONIGHT.

&&

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

SHORT TERM...17
LONG TERM....99
Hazardous weather outlook, Apr 6, 10:40 PM CDT, 44 minutes before
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In the hours before

Special weather statement, Apr 6, 8:51 PM CDT, 2 hours 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
851 PM CDT TUE APR 6 2010

OKZ054-070215-
OSAGE OK-
851 PM CDT TUE APR 6 2010

...SIGNIFICANT WEATHER ADVISORY...

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 915 PM CDT
FOR THE FOLLOWING COUNTY...

IN NORTHEAST OKLAHOMA
     NORTHERN OSAGE

AT 851 PM CDT...A STRONG THUNDERSTORM WAS LOCATED OVER SHIDLER...
MOVING NORTHEAST AT 55 MPH. SOME LOCATIONS THAT WILL BE AFFECTED BY
THIS STORM INCLUDE...SHIDLER...FORAKER AND GRAINOLA.

THIS STORM WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL. RESIDENTS IN
THESE AREAS SHOULD REMAIN ALERT IN CASE THE SIGNIFICANT WEATHER
ADVISORY IS UPGRADED TO A WARNING.

LAT...LON 3700 9650 3700 9628 3699 9628 3671 9663
      3680 9676 3686 9676 3701 9660 3700 9651
TIME...MOT...LOC 0151Z 222DEG 50KT 3683 9663
Local storm report, Apr 6, 10:16 PM CDT, 1 hour 8 minutes before
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Local storm report, Apr 6, 11:07 PM CDT, 17 minutes before
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Local storm report, Apr 6, 11:10 PM CDT, 14 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 8:51 PM CDTSpecial Weather StatementTSAOsage24 min
Apr 6, 9:37 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee53 min
Apr 6, 10:25 PM CDTSevere Thunderstorm WarningTSACreek, Osage, Pawnee, Tulsa, Washington65 min
Apr 6, 11:29 PM CDTSpecial Weather StatementTSACreek, Rogers, Tulsa61 min
Apr 6, 11:49 PM CDTSevere Thunderstorm WarningTSACraig, Creek, Mayes, Osage, Rogers, Tulsa and 2 more56 min
Apr 6, 11:53 PM CDTSevere Thunderstorm WarningTSACraig, Nowata, Ottawa, Rogers52 min
Apr 7, 12:12 AM CDTSevere Thunderstorm WarningTSAOkfuskee, Okmulgee26 min
Apr 7, 12:31 AM CDTSevere Thunderstorm WarningTSAAdair, Cherokee, Craig, Delaware, Mayes, Ottawa and 3 more59 min
Apr 7, 12:50 AM CDTSpecial Weather StatementTSAMcIntosh40 min
Apr 7, 1:22 AM CDTSpecial Weather StatementTSAHaskell, McIntosh, Muskogee53 min
Apr 7, 1:27 AM CDTSpecial Weather StatementTSADelaware63 min
Apr 7, 2:14 AM CDTSpecial Weather StatementTSAAdair61 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2010Every severe thunderstorm warning in 2010

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.