Alert archive / Missouri / Tornado Watches in 2010

Tornado Watch 51

April 5, 20104 states

The Storm Prediction Center issued this tornado watch at Apr 5, 2010, 7:39 PM CDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Apr 5, 2010, 7:39 PM CDT (00:39 UTC)
Expired
Apr 5, 2010, 10:47 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
Largest hail expected
3 in
Strongest gust expected
60 kt
All 47 counties

Adams County, IA, Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Lucas County, IA, Monroe County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Wayne County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Doniphan County, KS, Jackson County, KS, Marshall County, KS, Nemaha County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Washington County, KS, Adair County, MO, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Holt County, MO, Mercer County, MO, Nodaway County, MO, Putnam County, MO, Schuyler County, MO, Sullivan County, MO, Worth County, MO, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Pawnee County, NE, Richardson County, NE

The radar

The Omaha radar (KOAX), 132 km from the middle of the area, began a volume at 00:41 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
50%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
60%
One or more hailstones of 2 inches or more
50%
Six or more combined severe hail and wind reports
80%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 5, 7:43 PM CDTSevere Thunderstorm WarningTOPBrown, Nemaha18 min
Apr 5, 7:53 PM CDTSevere Thunderstorm WarningTOPMarshall37 min
Apr 5, 8:08 PM CDTSevere Thunderstorm WarningTOPWashington52 min
Apr 5, 8:26 PM CDTSevere Thunderstorm WarningTOPCloud, Republic, Washington34 min
Apr 5, 8:44 PM CDTSevere Thunderstorm WarningTOPMarshall, Washington31 min
Apr 5, 8:58 PM CDTTornado WarningTOPWashington32 min
Apr 5, 8:59 PM CDTSevere Thunderstorm WarningEAXAtchison, Holt, Nodaway26 min
Apr 5, 9:09 PM CDTSevere Thunderstorm WarningOAXGage, Pawnee36 min
Apr 5, 9:13 PM CDTSevere Thunderstorm WarningTOPMarshall17 min
Apr 5, 9:18 PM CDTTornado WarningTOPMarshall, Washington27 min
Apr 5, 9:38 PM CDTSevere Thunderstorm WarningTOPMarshall11 min

Discussions around it

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

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.7 hours before the alert went out and 133 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, Omaha, NE at 00:00Z on 2010-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2 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, Omaha, NE at 00:00Z on 2010-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 116 square meters per square second.1939587897117Sfc1 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
2 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
621 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
116 m²/s²
0-3 km storm-relative helicity
225 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 5, 7:24 PM CDTMesoscale DiscussionSPCDecatur, Fremont, Page, Ringgold, Taylor66 min
Apr 5, 9:37 PM CDTMesoscale DiscussionSPCBenton, Buchanan, Clayton, Delaware, Dubuque, Fayette and 3 more53 min
Apr 5, 9:54 PM CDTMesoscale DiscussionSPCAppanoose, Clarke, Decatur, Page, Ringgold, Taylor and 2 more66 min
Apr 5, 10:39 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Carroll and 30 more6 hr
Apr 5, 11:07 PM CDTSevere Thunderstorm WatchSPCClinton, Jackson, Scott5 hr
Apr 6, 1:20 AM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Calhoun, Carroll and 34 more85 min
Apr 6, 4:05 AM CDTMesoscale DiscussionSPCBenton, Black Hawk, Boone, Bremer, Buchanan, Butler and 25 more85 min
Apr 6, 4:44 AM CDTSevere Thunderstorm WatchSPCClinton, Dubuque, Jackson, Scott4 hr
Apr 6, 1:32 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Clarke, Dallas, Decatur and 14 more58 min
Apr 6, 2:57 PM CDTTornado WatchSPCAppanoose, Benton, Black Hawk, Buchanan, Cedar, Clarke and 30 more7 hr
Apr 6, 4:55 PM CDTMesoscale DiscussionSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Chickasaw and 8 more65 min
Apr 6, 5:06 PM CDTSevere Thunderstorm WatchSPCAllamakee, Clayton, Fayette, Winneshiek6 hr
Apr 6, 6:16 PM CDTMesoscale DiscussionSPCAppanoose, Benton, Cedar, Clarke, Davis, Decatur and 20 more59 min
Apr 6, 2:08 PM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Atchison, Butler, Chase, Chautauqua and 26 more8 hr
Apr 6, 6:08 PM CDTMesoscale DiscussionSPCButler, Chase, Douglas, Franklin, Johnson, Leavenworth and 3 more97 min

Nearby

Tornado Watches in Missouri, 2010Tornado Watches in Kansas, 2010Tornado Watches in Iowa, 2010Every tornado watch 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.