Alert archive / Iowa / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 100

April 16, 20025 states

The Storm Prediction Center issued this severe thunderstorm watch at Apr 16, 2002, 7:15 PM CDT for 5 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 16, 2002, 7:15 PM CDT (00:15 UTC)
Expired
Apr 17, 2002, 12:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 125 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Boone County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Dallas County, IA, Dickinson County, IA, Emmet County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Harrison County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, Madison County, IA, Mills County, IA, Monona County, IA, Montgomery County, IA, O'Brien County, IA, Osceola County, IA, Page County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Union County, IA, Webster County, IA, Winnebago County, IA, Woodbury County, IA, Worth County, IA, Wright County, IA, Atchison County, KS, Barton County, KS, Brown County, KS, Chase County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Doniphan County, KS, Douglas County, KS, Ellsworth County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Jewell County, KS, Leavenworth County, KS, Lincoln County, KS, Lyon County, KS, Marion County, KS, Marshall County, KS, McPherson County, KS, Mitchell County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Rice County, KS, Riley County, KS, Russell County, KS, Saline County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Holt County, MO, Nodaway County, MO, Worth County, MO, Burt County, NE, Butler County, NE, Cass County, NE, Cedar County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Douglas County, NE, Fillmore County, NE, Gage County, NE, Hamilton County, NE, Jefferson County, NE, Johnson County, NE, Lancaster County, NE, Madison County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Platte County, NE, Polk County, NE, Richardson County, NE, Saline County, NE, Sarpy County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, York County, NE, Clay County, SD, Lincoln County, SD, Union County, SD

The radar

The Omaha radar (KOAX), 116 km from the middle of the area, began a volume at 00:15 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.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 16, 7:19 PM CDTSevere Thunderstorm WarningFSDLyon, O'Brien, Sioux26 min
Apr 16, 7:29 PM CDTSevere Thunderstorm WarningFSDOsceola31 min
Apr 16, 7:38 PM CDTSevere Thunderstorm WarningOAXMadison, Pierce, Stanton, Wayne37 min
Apr 16, 7:53 PM CDTSevere Thunderstorm WarningGIDYork52 min
Apr 16, 7:57 PM CDTSevere Thunderstorm WarningOAXHarrison, Monona33 min
Apr 16, 8:02 PM CDTSevere Thunderstorm WarningGIDClay, Fillmore58 min
Apr 16, 8:02 PM CDTSevere Thunderstorm WarningOAXColfax, Platte28 min
Apr 16, 8:13 PM CDTSevere Thunderstorm WarningTOPCloud, Republic47 min
Apr 16, 8:14 PM CDTSevere Thunderstorm WarningGIDNuckolls61 min
Apr 16, 8:17 PM CDTSevere Thunderstorm WarningDMXEmmet, Palo Alto43 min
Apr 16, 8:18 PM CDTSevere Thunderstorm WarningGIDThayer57 min
Apr 16, 8:23 PM CDTSevere Thunderstorm WarningDMXPocahontas37 min
Apr 16, 8:23 PM CDTSevere Thunderstorm WarningOAXButler52 min
Apr 16, 8:24 PM CDTSevere Thunderstorm WarningOAXStanton51 min
Apr 16, 8:28 PM CDTSevere Thunderstorm WarningDMXKossuth32 min
Apr 16, 8:32 PM CDTSevere Thunderstorm WarningOAXCuming, Thurston43 min
Apr 16, 8:33 PM CDTSevere Thunderstorm WarningOAXColfax27 min
Apr 16, 8:35 PM CDTSevere Thunderstorm WarningTOPCloud, Ottawa40 min
Apr 16, 8:40 PM CDTSevere Thunderstorm WarningICTEllsworth50 min
Apr 16, 8:45 PM CDTSevere Thunderstorm WarningICTRice60 min
Apr 16, 8:47 PM CDTSevere Thunderstorm WarningICTSaline58 min
Apr 16, 8:49 PM CDTSevere Thunderstorm WarningOAXDodge41 min
Apr 16, 8:52 PM CDTSevere Thunderstorm WarningTOPClay38 min
Apr 16, 8:54 PM CDTSevere Thunderstorm WarningOAXLancaster, Saunders36 min
Apr 16, 9:06 PM CDTSevere Thunderstorm WarningDMXHancock, Winnebago39 min
Apr 16, 9:12 PM CDTSevere Thunderstorm WarningOAXBurt, Washington48 min
Apr 16, 9:16 PM CDTSevere Thunderstorm WarningOAXThurston29 min
Apr 16, 9:23 PM CDTSevere Thunderstorm WarningOAXMonona52 min
Apr 16, 9:31 PM CDTSevere Thunderstorm WarningICTMcPherson59 min
Apr 16, 9:32 PM CDTSevere Thunderstorm WarningOAXDouglas28 min
Apr 16, 9:42 PM CDTSevere Thunderstorm WarningICTRice63 min
Apr 16, 9:48 PM CDTSevere Thunderstorm WarningOAXHarrison57 min
Apr 16, 9:49 PM CDTSevere Thunderstorm WarningOAXPottawattamie26 min
Apr 16, 10:16 PM CDTSevere Thunderstorm WarningFSDClay29 min
Apr 16, 10:18 PM CDTSevere Thunderstorm WarningOAXPottawattamie57 min
Apr 16, 10:19 PM CDTSevere Thunderstorm WarningDMXEmmet, Palo Alto, Pocahontas41 min
Apr 16, 10:23 PM CDTSevere Thunderstorm WarningOAXShelby37 min
Apr 16, 10:23 PM CDTSevere Thunderstorm WarningICTMcPherson37 min
Apr 16, 10:30 PM CDTSevere Thunderstorm WarningTOPGeary30 min
Apr 16, 10:44 PM CDTSevere Thunderstorm WarningDMXAudubon, Carroll31 min

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 0.3 hours before the alert went out and 116 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 2002-04-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1974 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 2002-04-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 136 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
1974 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1343 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
136 m²/s²
0-3 km storm-relative helicity
196 m²/s²
Significant tornado parameter
1.1
Supercell composite
8.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 17, 12:00 AM CDTSevere Thunderstorm WatchSPCAllamakee, Benton, Black Hawk, Bremer, Buchanan, Butler and 19 more4 hr
Apr 17, 5:15 PM CDTSevere Thunderstorm WatchSPCBarber, Clark, Comanche, Edwards, Ford, Harper and 8 more6 hr

Nearby

Severe Thunderstorm Watches in Iowa, 2002Severe Thunderstorm Watches in Kansas, 2002Severe Thunderstorm Watches in Nebraska, 2002Every severe thunderstorm watch in 2002

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.