Alert archive / Missouri / Tornado Watches in 2008

Tornado Watch 956

December 27, 200819 counties in Arkansas; 46 counties in Missouri; 10 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Dec 27, 2008, 12:03 AM CST for 19 counties in Arkansas; 46 counties in Missouri; 10 counties in Oklahoma. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Dec 27, 2008, 12:03 AM CST (06:03 UTC)
Expired
Dec 27, 2008, 6:35 AM CST
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
60 kt
All 75 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Washington County, AR, Yell County, AR, Audrain County, MO, Barry County, MO, Barton County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, Christian County, MO, Cole County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Greene County, MO, Hickory County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, Lincoln County, MO, Maries County, MO, McDonald County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Newton County, MO, Osage County, MO, Ozark County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Saint Charles County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Warren County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Pittsburg County, OK, Sequoyah County, OK

The radar

The Springfield radar (KSGF), 42 km from the middle of the area, began a volume at 06:03 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Dec 27, 12:44 AM CSTTornado WarningLSXLewis, Marion, Monroe, Shelby46 min
Dec 27, 1:31 AM CSTTornado WarningLSXMarion, Monroe, Ralls, Shelby44 min
Dec 27, 2:13 AM CSTTornado WarningLSXMarion, Monroe, Ralls47 min
Dec 27, 2:37 AM CSTFlash Flood WarningLSXLewis, Marion, Monroe, Shelby6 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 00:00Z, 6.1 hours before the alert went out and 93 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 2008-12-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 153 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 00:00Z on 2008-12-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 452 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
153 J/kg
Mixed-layer CIN
-108 J/kg
Mixed-layer LCL
808 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
452 m²/s²
0-3 km storm-relative helicity
585 m²/s²
Significant tornado parameter
0.2
Supercell composite
0.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Dec 26, 9:05 PM CSTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Garland, Johnson and 10 more85 min
Dec 27, 3:32 AM CSTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 37 more88 min
Dec 27, 6:35 AM CSTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 34 more7 hr
Dec 27, 7:41 AM CSTTornado WatchSPCLafayette, Miller6 hr
Dec 27, 8:03 AM CSTMesoscale DiscussionSPCArkansas, Baxter, Benton, Boone, Bradley, Calhoun and 61 more117 min
Dec 27, 9:34 AM CSTMesoscale DiscussionSPCBaxter, Clay, Fulton, Greene, Independence, Izard and 4 more56 min
Dec 27, 1:20 PM CSTMesoscale DiscussionSPCArkansas, Ashley, Baxter, Bradley, Calhoun, Chicot and 52 more25 min
Dec 27, 1:52 PM CSTTornado WatchSPCBaxter, Clay, Cleburne, Conway, Craighead, Cross and 26 more5 hr
Dec 27, 3:46 PM CSTMesoscale DiscussionSPCClay, Craighead, Cross, Greene, Independence, Jackson and 10 more89 min
Dec 27, 5:47 PM CSTSevere Thunderstorm WatchSPCCrittenden4 hr
Dec 26, 11:15 PM CSTMesoscale DiscussionSPCAdams, Brown, Fulton, Hancock, Henderson, Knox and 6 more90 min
Dec 27, 1:35 AM CSTTornado WatchSPCAdams, Brown, Calhoun, Cass, Champaign, Christian and 26 more7 hr
Dec 27, 4:30 AM CSTTornado WatchSPCAdams, Bond, Brown, Calhoun, Clinton, Fayette and 11 more8 hr
Dec 27, 8:48 AM CSTMesoscale DiscussionSPCCass, Christian, DeWitt, Fulton, Knox, Logan and 9 more27 min
Dec 27, 10:26 AM CSTMesoscale DiscussionSPCAdams, Alexander, Bond, Brown, Calhoun, Cass and 45 more94 min
Dec 27, 10:58 AM CSTTornado WatchSPCBrown, Bureau, Calhoun, Cass, Champaign, Christian and 43 more8 hr
Dec 27, 11:46 AM CSTMesoscale DiscussionSPCBureau, Calhoun, Cass, Christian, DeKalb, DeWitt and 32 more89 min
Dec 27, 12:30 PM CSTTornado WatchSPCCook, DeKalb, DuPage, Ford, Grundy, Iroquois and 6 more4 hr
Dec 27, 12:45 PM CSTTornado WatchSPCBond, Clinton, Fayette, Jersey, Macoupin, Madison and 6 more5 hr
Dec 27, 1:54 PM CSTMesoscale DiscussionSPCBond, Champaign, Christian, Clark, Clay, Clinton and 29 more2 hr
Dec 27, 5:06 PM CSTMesoscale DiscussionSPCCrawford, Edwards, Gallatin, Hamilton, Hardin, Johnson and 10 more84 min
Dec 26, 6:47 PM CSTMesoscale DiscussionSPCBarton, Bates, Buchanan, Cass, Clay, Jackson and 5 more58 min
Dec 26, 9:51 PM CSTTornado WatchSPCBates, Buchanan, Caldwell, Carroll, Cass, Chariton and 13 more7 hr
Dec 27, 9:41 AM CSTMesoscale DiscussionSPCAdair, Caldwell, Carroll, Cass, Clay, Clinton and 12 more3 hr
Dec 27, 12:07 AM CSTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 22 more83 min
Dec 27, 2:02 AM CSTTornado WatchSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 41 more7 hr

Nearby

Tornado Watches in Missouri, 2008Tornado Watches in Arkansas, 2008Tornado Watches in Oklahoma, 2008Every tornado 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.