Alert archive / Nebraska / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 830

October 4, 200517 counties in Iowa; 35 counties in Nebraska; Union County, South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Oct 4, 2005, 4:05 PM CDT for 17 counties in Iowa; 35 counties in Nebraska; Union County, South Dakota. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Oct 4, 2005, 4:05 PM CDT (21:05 UTC)
Expired
Oct 4, 2005, 11:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
All 53 counties

Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Ida County, IA, Kossuth County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Sioux County, IA, Winnebago County, IA, Woodbury County, IA, Adams County, NE, Boone County, NE, Buffalo County, NE, Burt County, NE, Butler County, NE, Clay County, NE, Colfax County, NE, Cuming County, NE, Dakota County, NE, Dixon County, NE, Dodge County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Howard County, NE, Kearney County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Phelps County, NE, Platte County, NE, Polk County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE, Union County, SD

The radar

The Omaha radar (KOAX), 118 km from the middle of the area, began a volume at 21:05 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

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

IssuedProductOfficeCountiesLasted
Oct 4, 4:19 PM CDTSevere Thunderstorm WarningDMXEmmet21 min
Oct 4, 4:45 PM CDTSevere Thunderstorm WarningFSDIda, Woodbury30 min
Oct 4, 5:06 PM CDTSevere Thunderstorm WarningFSDO'Brien, Osceola24 min
Oct 4, 5:09 PM CDTSevere Thunderstorm WarningFSDBuena Vista, Cherokee36 min
Oct 4, 5:12 PM CDTSevere Thunderstorm WarningOAXCuming, Wayne33 min
Oct 4, 5:19 PM CDTSevere Thunderstorm WarningGIDKearney, Phelps34 min
Oct 4, 5:26 PM CDTSevere Thunderstorm WarningOAXThurston34 min
Oct 4, 5:31 PM CDTSevere Thunderstorm WarningGIDBuffalo31 min
Oct 4, 5:39 PM CDTSevere Thunderstorm WarningOAXThurston36 min
Oct 4, 5:53 PM CDTFlash Flood WarningFSDDakota3 hr
Oct 4, 5:57 PM CDTFlash Flood WarningOAXCuming, Stanton, Thurston, Wayne3 hr
Oct 4, 6:00 PM CDTFlash Flood WarningFSDPlymouth, Woodbury2 hr
Oct 4, 6:07 PM CDTSevere Thunderstorm WarningOAXThurston23 min
Oct 4, 7:12 PM CDTFlash Flood WarningFSDCherokee, O'Brien, Osceola4 hr
Oct 4, 7:36 PM CDTSevere Thunderstorm WarningFSDClay, Dickinson24 min
Oct 4, 7:57 PM CDTSevere Thunderstorm WarningDMXPalo Alto48 min
Oct 4, 8:00 PM CDTFlash Flood WarningFSDIda, Woodbury2 hr
Oct 4, 8:33 PM CDTSevere Thunderstorm WarningDMXKossuth29 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 12:00Z, 9.1 hours before the alert went out and 118 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 12:00Z on 2005-10-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 780 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 12:00Z on 2005-10-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 355 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
780 J/kg
Mixed-layer CIN
-138 J/kg
Mixed-layer LCL
836 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
355 m²/s²
0-3 km storm-relative helicity
345 m²/s²
Significant tornado parameter
0.4
Supercell composite
8.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 4, 3:28 PM CDTMesoscale DiscussionSPCAllamakee, Howard, Winneshiek2 hr
Oct 4, 4:02 PM CDTMesoscale DiscussionSPCBuena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 14 more118 min
Oct 4, 5:28 PM CDTMesoscale DiscussionSPCBuena Vista, Cherokee, Clay, Dickinson, Emmet, Ida and 11 more3 hr
Oct 4, 6:59 PM CDTMesoscale DiscussionSPCButte, Harding, Lawrence, Perkins5 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2005Severe Thunderstorm Watches in Iowa, 2005Severe Thunderstorm Watches in South Dakota, 2005Every severe thunderstorm watch in 2005

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.