Alert archive / Nebraska / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 712

September 7, 20014 states

The Storm Prediction Center issued this severe thunderstorm watch at Sep 7, 2001, 1:30 AM CDT for 4 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Sep 7, 2001, 1:30 AM CDT (06:30 UTC)
Expired
Sep 7, 2001, 7:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 59 counties

Cherokee County, IA, Dickinson County, IA, Lyon County, IA, Monona County, IA, O'Brien County, IA, Osceola County, IA, Plymouth County, IA, Sioux County, IA, Woodbury County, IA, Cloud County, KS, Jewell County, KS, Mitchell County, KS, Osborne County, KS, Phillips County, KS, Republic County, KS, Rooks County, KS, Smith County, KS, Adams County, NE, Antelope County, NE, Boone County, NE, Burt County, NE, Butler County, NE, Cedar 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, Hall County, NE, Hamilton County, NE, Howard County, NE, Jefferson County, NE, Kearney County, NE, Lancaster County, NE, Madison County, NE, Merrick County, NE, Nance County, NE, Nuckolls County, NE, Pierce County, NE, Platte County, NE, Polk County, NE, Saline County, NE, Saunders County, NE, Seward County, NE, Stanton County, NE, Thayer County, NE, Thurston County, NE, Washington County, NE, Wayne County, NE, Webster County, NE, York County, NE, Clay County, SD, Lincoln County, SD, Turner County, SD, Union County, SD, Yankton County, SD

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Sep 7, 1:48 AM CDTSevere Thunderstorm WarningOAXKnox, Pierce42 min
Sep 7, 1:52 AM CDTSevere Thunderstorm WarningGIDOsborne, Smith53 min
Sep 7, 1:54 AM CDTSevere Thunderstorm WarningFSDBon Homme, Yankton36 min
Sep 7, 1:55 AM CDTSevere Thunderstorm WarningOAXAntelope, Boone35 min
Sep 7, 2:43 AM CDTSevere Thunderstorm WarningGIDMitchell47 min
Sep 7, 2:56 AM CDTSevere Thunderstorm WarningGIDPolk34 min
Sep 7, 3:13 AM CDTSevere Thunderstorm WarningOAXCuming32 min
Sep 7, 3:18 AM CDTSevere Thunderstorm WarningOAXColfax27 min
Sep 7, 3:24 AM CDTSevere Thunderstorm WarningOAXDodge36 min
Sep 7, 3:51 AM CDTSevere Thunderstorm WarningOAXBurt, Cuming, Thurston24 min

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 6.5 hours before the alert went out and 136 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 2001-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1486 joules per kilogram.LCLEL10008507005003002001001 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 2001-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.1939Sfc1 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
1486 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
1117 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
213 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 7, 4:00 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Allamakee, Appanoose, Benton, Black Hawk and 45 more5 hr
Sep 7, 4:45 PM CDTSevere Thunderstorm WatchSPCAudubon, Cass, Fremont, Harrison, Mills, Montgomery and 2 more3 hr
Sep 7, 6:15 PM CDTSevere Thunderstorm WatchSPCCedar, Clinton, Dubuque, Jackson, Johnson, Jones and 1 more6 hr
Sep 7, 2:00 PM CDTSevere Thunderstorm WatchSPCAtchison, Brown, Chase, Clay, Dickinson, Doniphan and 18 more6 hr
Sep 7, 3:15 PM CDTTornado WatchSPCButler, Chautauqua, Cowley, Elk, Greenwood, Harper and 5 more6 hr
Sep 7, 6:00 PM CDTTornado WatchSPCAtchison, Brown, Chase, Doniphan, Douglas, Franklin and 16 more5 hr
Sep 6, 11:00 PM CDTSevere Thunderstorm WatchSPCAntelope, Blaine, Boyd, Buffalo, Custer, Dawson and 16 more3 hr

Nearby

Severe Thunderstorm Watches in Nebraska, 2001Severe Thunderstorm Watches in Iowa, 2001Severe Thunderstorm Watches in Kansas, 2001Every severe thunderstorm watch in 2001

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.