Alert archive / Iowa / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 370

May 14, 2003Henderson County, Mercer County, Illinois; 40 counties in Iowa; Putnam County, Schuyler County, Missouri

The Storm Prediction Center issued this severe thunderstorm watch at May 14, 2003, 2:00 PM CDT for Henderson County, Mercer County, Illinois; 40 counties in Iowa; Putnam County, Schuyler County, Missouri. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 14, 2003, 2:00 PM CDT (19:00 UTC)
Expired
May 14, 2003, 7:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 44 counties

Adair County, IA, Adams County, IA, Appanoose County, IA, Audubon County, IA, Cass County, IA, Clarke County, IA, Dallas County, IA, Davis County, IA, Decatur County, IA, Des Moines County, IA, Fremont County, IA, Guthrie County, IA, Henry County, IA, Iowa County, IA, Jasper County, IA, Jefferson County, IA, Johnson County, IA, Keokuk County, IA, Lee County, IA, Louisa County, IA, Lucas County, IA, Madison County, IA, Mahaska County, IA, Marion County, IA, Monroe County, IA, Montgomery County, IA, Muscatine County, IA, Page County, IA, Polk County, IA, Pottawattamie County, IA, Poweshiek County, IA, Ringgold County, IA, Shelby County, IA, Taylor County, IA, Union County, IA, Van Buren County, IA, Wapello County, IA, Warren County, IA, Washington County, IA, Wayne County, IA, Henderson County, IL, Mercer County, IL, Putnam County, MO, Schuyler County, MO

The radar

The Des Moines radar (KDMX), 53 km from the middle of the area, began a volume at 19:02 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

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

IssuedProductOfficeCountiesLasted
May 14, 2:01 PM CDTSevere Thunderstorm WarningOAXPottawattamie44 min
May 14, 2:09 PM CDTSevere Thunderstorm WarningDMXJasper51 min
May 14, 2:24 PM CDTSevere Thunderstorm WarningDMXCass51 min
May 14, 2:53 PM CDTSevere Thunderstorm WarningDMXPoweshiek52 min
May 14, 3:24 PM CDTSevere Thunderstorm WarningDMXMarion, Warren36 min
May 14, 4:08 PM CDTSevere Thunderstorm WarningDVNKeokuk37 min
May 14, 4:24 PM CDTSevere Thunderstorm WarningDMXAppanoose36 min
May 14, 4:26 PM CDTSevere Thunderstorm WarningDMXWayne34 min
May 14, 4:33 PM CDTSevere Thunderstorm WarningDVNWashington42 min
May 14, 5:43 PM CDTSevere Thunderstorm WarningDVNLee, Van Buren47 min
May 14, 5:57 PM CDTSevere Thunderstorm WarningDVNJohnson48 min
May 14, 6:05 PM CDTSevere Thunderstorm WarningDVNHenderson55 min
May 14, 6:11 PM CDTSevere Thunderstorm WarningDMXDallas19 min
May 14, 6:37 PM CDTTornado WarningDVNHenderson, McDonough43 min
May 14, 6:43 PM CDTSevere Thunderstorm WarningDVNMercer, Warren42 min
May 14, 6:50 PM CDTSevere Thunderstorm WarningDVNJohnson25 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, 7.0 hours before the alert went out and 228 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 2003-05-14Temperature 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 2003-05-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939587897Sfc1 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
2025 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
67 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
May 14, 12:36 PM CDTMesoscale DiscussionSPCAdams, Brown, Bureau, Cass, Champaign, Christian and 38 more84 min
May 14, 1:10 PM CDTSevere Thunderstorm WatchSPCBrown, Bureau, Cass, Champaign, DeWitt, Douglas and 33 more6 hr
May 14, 2:45 PM CDTMesoscale DiscussionSPCBureau, Cass, Champaign, Christian, Coles, DeWitt and 32 more60 min
May 14, 3:23 PM CDTMesoscale DiscussionSPCHancock, Henderson97 min
May 14, 5:07 PM CDTMesoscale DiscussionSPCBrown, Bureau, Cass, Champaign, DeWitt, Douglas and 28 more113 min
May 14, 6:45 PM CDTSevere Thunderstorm WatchSPCBond, Brown, Calhoun, Cass, Champaign, Christian and 35 more5 hr
May 13, 8:38 PM CDTMesoscale DiscussionSPCFremont, Page2 hr
May 14, 12:40 PM CDTMesoscale DiscussionSPCAdair, Adams, Audubon, Boone, Cass, Clarke and 22 more95 min

Nearby

Severe Thunderstorm Watches in Iowa, 2003Severe Thunderstorm Watches in Illinois, 2003Severe Thunderstorm Watches in Missouri, 2003Every severe thunderstorm watch in 2003

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.