Alert archive / Iowa / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 224

May 10, 200119 counties in Illinois; 26 counties in Iowa; 25 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at May 10, 2001, 8:45 PM CDT for 19 counties in Illinois; 26 counties in Iowa; 25 counties in Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2001, 8:45 PM CDT (01:45 UTC)
Expired: May 11, 2001, 2:00 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 70 counties

Appanoose County, IA, Cedar County, IA, Clarke County, IA, Clinton County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Henry County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Muscatine County, IA, Ringgold County, IA, Scott County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Washington County, IA, Wayne County, IA, Bureau County, IL, Carroll County, IL, Fulton County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Knox County, IL, Lee County, IL, Marshall County, IL, McDonough County, IL, Mercer County, IL, Ogle County, IL, Peoria County, IL, Putnam County, IL, Rock Island County, IL, Stark County, IL, Tazewell County, IL, Warren County, IL, Whiteside County, IL, Adair County, MO, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Clark County, MO, Clay County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Knox County, MO, Lewis County, MO, Linn County, MO, Livingston County, MO, Macon County, MO, Mercer County, MO, Nodaway County, MO, Platte County, MO, Putnam County, MO, Schuyler County, MO, Scotland County, MO, Sullivan County, MO, Worth County, MO

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 10, 8:56 PM CDT	Severe Thunderstorm Warning	EAX	Nodaway	64 min
May 10, 8:58 PM CDT	Tornado Warning	DVN	Clinton	47 min
May 10, 9:05 PM CDT	Severe Thunderstorm Warning	DVN	Rock Island, Whiteside	40 min
May 10, 9:06 PM CDT	Severe Thunderstorm Warning	DMX	Clarke	19 min
May 10, 9:10 PM CDT	Severe Thunderstorm Warning	DMX	Wapello	40 min
May 10, 9:14 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Mercer	61 min
May 10, 9:16 PM CDT	Severe Thunderstorm Warning	DMX	Lucas	39 min
May 10, 9:20 PM CDT	Tornado Warning	DVN	Whiteside	40 min
May 10, 9:26 PM CDT	Severe Thunderstorm Warning	EAX	Andrew	64 min
May 10, 9:47 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	73 min
May 10, 10:26 PM CDT	Severe Thunderstorm Warning	EAX	Andrew	64 min
May 10, 10:39 PM CDT	Severe Thunderstorm Warning	DVN	Warren	81 min
May 10, 10:45 PM CDT	Severe Thunderstorm Warning	ILX	Knox	60 min

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 1.8 hours before the alert went out and 204 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 794 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1445 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 142 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.4

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.

Nearby

Severe Thunderstorm Watches in Iowa, 2001 Severe Thunderstorm Watches in Missouri, 2001 Severe Thunderstorm Watches in Illinois, 2001 Every 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.