Alert archive / Iowa / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 609

August 16, 20024 states

The Storm Prediction Center issued this severe thunderstorm watch at Aug 16, 2002, 11:55 AM CDT for 4 states. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Aug 16, 2002, 11:55 AM CDT (16:55 UTC)
Expired
Aug 16, 2002, 4:00 PM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 59 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Buena Vista County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cherokee County, IA, Clay County, IA, Crawford County, IA, Decatur County, IA, Dickinson County, IA, Fremont County, IA, Greene County, IA, Guthrie County, IA, Harrison County, IA, Ida 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, Plymouth County, IA, Pocahontas County, IA, Pottawattamie County, IA, Ringgold County, IA, Sac County, IA, Shelby County, IA, Sioux County, IA, Taylor County, IA, Union County, IA, Woodbury County, IA, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Rock County, MN, Burt County, NE, Dakota County, NE, Douglas County, NE, Sarpy County, NE, Thurston County, NE, Washington County, NE, Brookings County, SD, Clay County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD

The radar

The Sioux Falls radar (KFSD), 109 km from the middle of the area, began a volume at 16:59 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

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

IssuedProductOfficeCountiesLasted
Aug 16, 11:58 AM CDTSevere Thunderstorm WarningFSDTurner, Yankton32 min
Aug 16, 12:00 PM CDTSevere Thunderstorm WarningOAXHarrison30 min
Aug 16, 12:25 PM CDTSevere Thunderstorm WarningFSDClay35 min
Aug 16, 12:28 PM CDTSevere Thunderstorm WarningOAXThurston47 min
Aug 16, 12:29 PM CDTSevere Thunderstorm WarningOAXHarrison31 min
Aug 16, 12:44 PM CDTSevere Thunderstorm WarningFSDDakota, Dixon31 min
Aug 16, 12:50 PM CDTSevere Thunderstorm WarningOAXPottawattamie25 min
Aug 16, 12:52 PM CDTSevere Thunderstorm WarningOAXMonona53 min
Aug 16, 12:57 PM CDTSevere Thunderstorm WarningOAXHarrison33 min
Aug 16, 1:08 PM CDTSevere Thunderstorm WarningFSDWoodbury37 min
Aug 16, 1:19 PM CDTSevere Thunderstorm WarningFSDPlymouth41 min
Aug 16, 1:33 PM CDTSevere Thunderstorm WarningDMXCrawford42 min
Aug 16, 1:36 PM CDTSevere Thunderstorm WarningFSDClay14 min
Aug 16, 1:37 PM CDTSevere Thunderstorm WarningFSDClay13 min
Aug 16, 1:44 PM CDTSevere Thunderstorm WarningFSDIda, Woodbury31 min
Aug 16, 2:01 PM CDTSevere Thunderstorm WarningFSDPlymouth, Sioux29 min
Aug 16, 2:20 PM CDTSevere Thunderstorm WarningFSDIda, Woodbury25 min
Aug 16, 2:30 PM CDTSevere Thunderstorm WarningFSDSioux30 min
Aug 16, 2:40 PM CDTSevere Thunderstorm WarningDMXCrawford50 min
Aug 16, 2:53 PM CDTSevere Thunderstorm WarningDMXSac47 min
Aug 16, 3:10 PM CDTSevere Thunderstorm WarningFSDLyon35 min
Aug 16, 3:13 PM CDTSevere Thunderstorm WarningFSDRock32 min
Aug 16, 3:23 PM CDTSevere Thunderstorm WarningFSDClay, O'Brien52 min
Aug 16, 3:32 PM CDTSevere Thunderstorm WarningFSDCherokee18 min
Aug 16, 3:41 PM CDTSevere Thunderstorm WarningDMXCarroll34 min
Aug 16, 3:45 PM CDTSevere Thunderstorm WarningFSDNobles, Rock30 min
Aug 16, 3:49 PM CDTSevere Thunderstorm WarningDMXAudubon26 min
Aug 16, 3:56 PM CDTSevere Thunderstorm WarningFSDBuena Vista34 min

The nearest sounding before it

Omaha, NE (KOAX), launched 12:00Z, 4.9 hours before the alert went out and 195 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 2002-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2002-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -16 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2380 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-16 m²/s²
0-3 km storm-relative helicity
189 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
Aug 16, 6:25 PM CDTSevere Thunderstorm WatchSPCClay, Norman, Polk, Wilkin6 hr
Aug 16, 3:40 PM CDTSevere Thunderstorm WatchSPCCampbell, Corson, Dewey, Harding, Perkins, Walworth5 hr

Nearby

Severe Thunderstorm Watches in Iowa, 2002Severe Thunderstorm Watches in South Dakota, 2002Severe Thunderstorm Watches in Minnesota, 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.