Alert archive / Iowa / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 221

May 10, 20016 counties in Illinois; 52 counties in Iowa; Lafayette County, Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at May 10, 2001, 4:15 PM CDT for 6 counties in Illinois; 52 counties in Iowa; Lafayette County, Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 10, 2001, 4:15 PM CDT (21:15 UTC)
Expired
May 10, 2001, 10:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 59 counties

Adair County, IA, Adams County, IA, Audubon County, IA, Benton County, IA, Black Hawk County, IA, Boone County, IA, Buchanan County, IA, Calhoun County, IA, Carroll County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Dallas County, IA, Decatur County, IA, Delaware County, IA, Des Moines County, IA, Dubuque County, IA, Greene County, IA, Grundy County, IA, Guthrie County, IA, Hamilton County, IA, Hardin County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Linn County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Marshall County, IA, Monroe County, IA, Muscatine County, IA, Polk County, IA, Poweshiek County, IA, Ringgold County, IA, Scott County, IA, Story County, IA, Tama County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Webster County, IA, Carroll County, IL, Henry County, IL, Jo Daviess County, IL, Mercer County, IL, Rock Island County, IL, Whiteside County, IL, Lafayette County, WI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 10, 4:33 PM CDTSevere Thunderstorm WarningDMXBoone47 min
May 10, 4:34 PM CDTSevere Thunderstorm WarningDMXGrundy41 min
May 10, 4:35 PM CDTSevere Thunderstorm WarningDMXGreene30 min
May 10, 4:37 PM CDTTornado WarningDMXGreene28 min
May 10, 4:43 PM CDTSevere Thunderstorm WarningDVNBuchanan47 min
May 10, 4:56 PM CDTTornado WarningDMXBoone29 min
May 10, 5:01 PM CDTTornado WarningDMXMarshall19 min
May 10, 5:03 PM CDTSevere Thunderstorm WarningDMXAudubon, Guthrie42 min
May 10, 5:05 PM CDTSevere Thunderstorm WarningDMXGreene40 min
May 10, 5:07 PM CDTTornado WarningDMXGrundy13 min
May 10, 5:15 PM CDTTornado WarningDMXGreene, Guthrie40 min
May 10, 5:19 PM CDTTornado WarningDMXTama31 min
May 10, 5:25 PM CDTTornado WarningDMXBoone, Story45 min
May 10, 5:27 PM CDTSevere Thunderstorm WarningDVNBuchanan, Delaware48 min
May 10, 5:39 PM CDTSevere Thunderstorm WarningDMXBlack Hawk46 min
May 10, 5:39 PM CDTTornado WarningDMXTama31 min
May 10, 5:44 PM CDTSevere Thunderstorm WarningDVNBenton, Iowa61 min
May 10, 5:50 PM CDTSevere Thunderstorm WarningDMXStory30 min
May 10, 5:54 PM CDTTornado WarningDMXGuthrie41 min
May 10, 6:01 PM CDTTornado WarningDVNBenton44 min
May 10, 6:05 PM CDTTornado WarningDMXMarshall40 min
May 10, 6:05 PM CDTTornado WarningDVNDelaware40 min
May 10, 6:11 PM CDTSevere Thunderstorm WarningDMXJasper39 min
May 10, 6:24 PM CDTTornado WarningDMXJasper31 min
May 10, 6:27 PM CDTTornado WarningDMXDallas43 min
May 10, 6:28 PM CDTTornado WarningDVNIowa47 min
May 10, 6:33 PM CDTTornado WarningDVNJohnson, Linn57 min
May 10, 6:38 PM CDTSevere Thunderstorm WarningDMXPoweshiek, Tama42 min
May 10, 6:42 PM CDTTornado WarningDVNBenton63 min
May 10, 6:43 PM CDTSevere Thunderstorm WarningDMXJasper42 min
May 10, 7:01 PM CDTSevere Thunderstorm WarningMKXIowa, Lafayette74 min
May 10, 7:08 PM CDTSevere Thunderstorm WarningDMXDallas, Polk32 min
May 10, 7:11 PM CDTTornado WarningDVNJones64 min
May 10, 7:15 PM CDTSevere Thunderstorm WarningDVNIowa60 min
May 10, 7:20 PM CDTSevere Thunderstorm WarningDMXPoweshiek40 min
May 10, 7:28 PM CDTTornado WarningDVNJohnson, Linn62 min
May 10, 7:29 PM CDTSevere Thunderstorm WarningDMXMadison, Warren41 min
May 10, 7:33 PM CDTSevere Thunderstorm WarningDMXJasper42 min
May 10, 7:48 PM CDTTornado WarningDVNCedar42 min
May 10, 7:59 PM CDTSevere Thunderstorm WarningDMXPoweshiek41 min
May 10, 8:01 PM CDTSevere Thunderstorm WarningDMXMadison, Warren39 min
May 10, 8:02 PM CDTTornado WarningDVNClinton, Jackson58 min
May 10, 8:10 PM CDTTornado WarningDMXMarion30 min
May 10, 8:11 PM CDTTornado WarningDVNJones34 min
May 10, 8:23 PM CDTSevere Thunderstorm WarningDMXClarke, Lucas42 min
May 10, 8:26 PM CDTSevere Thunderstorm WarningDMXTaylor19 min
May 10, 8:27 PM CDTTornado WarningDVNMuscatine63 min
May 10, 8:28 PM CDTTornado WarningDVNCedar62 min
May 10, 8:33 PM CDTSevere Thunderstorm WarningDVNJohnson27 min
May 10, 8:35 PM CDTSevere Thunderstorm WarningDMXMahaska40 min
May 10, 8:39 PM CDTTornado WarningDVNScott66 min
May 10, 8:40 PM CDTSevere Thunderstorm WarningDVNKeokuk50 min
May 10, 8:42 PM CDTSevere Thunderstorm WarningDMXWarren18 min
May 10, 8:58 PM CDTTornado WarningDVNClinton47 min
May 10, 9:05 PM CDTSevere Thunderstorm WarningDVNRock Island, Whiteside40 min
May 10, 9:06 PM CDTSevere Thunderstorm WarningDMXClarke19 min
May 10, 9:10 PM CDTSevere Thunderstorm WarningDMXWapello40 min
May 10, 9:14 PM CDTSevere Thunderstorm WarningDVNHenry, Mercer61 min
May 10, 9:16 PM CDTSevere Thunderstorm WarningDMXLucas39 min
May 10, 9:20 PM CDTTornado WarningDVNWhiteside40 min

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 9.3 hours before the alert went out and 200 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, Davenport, at 12:00Z on 2001-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 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, Davenport, at 12:00Z on 2001-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
2104 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
102 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
May 9, 9:00 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Appanoose, Audubon, Boone, Cass and 29 more5 hr
May 9, 10:00 PM CDTSevere Thunderstorm WatchSPCAllamakee, Clayton, Fayette, Winneshiek5 hr
May 10, 11:00 AM CDTSevere Thunderstorm WatchSPCAdair, Allamakee, Audubon, Benton, Black Hawk, Boone and 47 more5 hr
May 10, 5:00 PM CDTSevere Thunderstorm WatchSPCDubuque5 hr
May 10, 5:30 PM CDTSevere Thunderstorm WatchSPCCass, Fremont, Mills, Montgomery, Page, Pottawattamie and 1 more5 hr
May 9, 7:30 PM CDTSevere Thunderstorm WatchSPCAshland, Barron, Bayfield, Burnett, Douglas, Iron and 5 more6 hr

Nearby

Severe Thunderstorm Watches in Iowa, 2001Severe Thunderstorm Watches in Illinois, 2001Severe Thunderstorm Watches in Wisconsin, 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.