Alert archive / Oklahoma / Severe Thunderstorm Watches in 2008

Severe Thunderstorm Watch 628

June 28, 20087 counties in Arkansas; 6 counties in Missouri; 16 counties in Oklahoma

The Storm Prediction Center issued this severe thunderstorm watch at Jun 28, 2008, 10:29 AM CDT for 7 counties in Arkansas; 6 counties in Missouri; 16 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 28, 2008, 10:29 AM CDT (15:29 UTC)
Expired
Jun 28, 2008, 3:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 29 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Sebastian County, AR, Washington County, AR, Barry County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Nowata County, OK, Okmulgee County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 52 km from the middle of the area, began a volume at 15:32 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 SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 28, 10:49 AM CDTSevere Thunderstorm WarningTSACraig, Delaware, Ottawa33 min
Jun 28, 11:09 AM CDTFlash Flood WarningSGFMcDonald, Newton5 hr
Jun 28, 11:20 AM CDTFlash Flood WarningSGFBarry, Lawrence6 hr
Jun 28, 11:51 AM CDTSevere Thunderstorm WarningSGFBarry35 min
Jun 28, 2:24 PM CDTFlash Flood WarningSGFOzark, Stone, Taney6 hr
Jun 28, 2:33 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore, Pittsburg57 min
Jun 28, 2:43 PM CDTFlash Flood WarningTSAFranklin, Sebastian4 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 3.5 hours before the alert went out and 128 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 12:00Z on 2008-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 311 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, Springfield, MO at 12:00Z on 2008-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 217 square meters per square second.193958Sfc1 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
311 J/kg
Mixed-layer CIN
-160 J/kg
Mixed-layer LCL
555 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
217 m²/s²
0-3 km storm-relative helicity
254 m²/s²
Significant tornado parameter
0.0
Supercell composite
7.7

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 28, 2:49 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Fulton and 4 more56 min
Jun 28, 5:26 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Fulton, Madison and 3 more64 min
Jun 28, 10:21 AM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Howard, Johnson and 9 more24 min
Jun 28, 1:00 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Johnson, Logan and 5 more90 min
Jun 28, 2:44 PM CDTSevere Thunderstorm WatchSPCFranklin, Howard, Logan, Montgomery, Pike, Polk and 4 more7 hr
Jun 28, 5:32 PM CDTMesoscale DiscussionSPCHempstead, Lafayette, Miller, Nevada88 min
Jun 28, 6:09 PM CDTSevere Thunderstorm WatchSPCCalhoun, Clark, Columbia, Dallas, Hempstead, Lafayette and 5 more7 hr
Jun 27, 8:13 PM CDTSevere Thunderstorm WatchSPCAdair, Andrew, Audrain, Bates, Benton, Boone and 44 more8 hr
Jun 27, 11:26 PM CDTMesoscale DiscussionSPCBarton, Camden, Cedar, Crawford, Dade, Dallas and 26 more94 min
Jun 27, 11:42 PM CDTSevere Thunderstorm WatchSPCBarry, Barton, Benton, Boone, Callaway, Camden and 49 more9 hr
Jun 28, 3:21 AM CDTMesoscale DiscussionSPCAlfalfa, Garfield, Grant, Kay, Kingfisher, Lincoln and 5 more84 min

Nearby

Severe Thunderstorm Watches in Oklahoma, 2008Severe Thunderstorm Watches in Arkansas, 2008Severe Thunderstorm Watches in Missouri, 2008Every severe thunderstorm watch in 2008

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.