Alert archive / Missouri / Severe Thunderstorm Watches in 2001

Severe Thunderstorm Watch 573

July 18, 200110 counties in Iowa; 15 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Jul 18, 2001, 1:00 AM CDT for 10 counties in Iowa; 15 counties in Missouri. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Jul 18, 2001, 1:00 AM CDT (06:00 UTC)
Expired
Jul 18, 2001, 5:00 AM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 25 counties

Adams County, IA, Clarke County, IA, Decatur County, IA, Mills County, IA, Montgomery County, IA, Page County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wayne County, IA, Andrew County, MO, Buchanan County, MO, Caldwell County, MO, Clinton County, MO, Daviess County, MO, DeKalb County, MO, Gentry County, MO, Grundy County, MO, Harrison County, MO, Linn County, MO, Livingston County, MO, Mercer County, MO, Nodaway County, MO, Sullivan County, MO, Worth County, MO

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 18, 1:02 AM CDTSevere Thunderstorm WarningOAXMontgomery18 min
Jul 18, 1:28 AM CDTSevere Thunderstorm WarningDMXTaylor42 min
Jul 18, 1:56 AM CDTSevere Thunderstorm WarningDMXRinggold39 min

The nearest sounding before it

Omaha, NE (KOAX), launched 00:00Z, 6.0 hours before the alert went out and 213 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 2001-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3248 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, Omaha, NE at 00:00Z on 2001-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -30 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
3248 J/kg
Mixed-layer CIN
-91 J/kg
Mixed-layer LCL
1677 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
-30 m²/s²
0-3 km storm-relative helicity
154 m²/s²
Significant tornado parameter
0.9
Supercell composite
40.0

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
Jul 17, 10:00 PM CDTSevere Thunderstorm WatchSPCAdair, Adams, Audubon, Carroll, Cass, Clarke and 12 more5 hr
Jul 18, 1:15 PM CDTSevere Thunderstorm WatchSPCBollinger, Cape Girardeau, Iron, Jefferson, Madison, Mississippi and 7 more5 hr
Jul 18, 4:45 PM CDTSevere Thunderstorm WatchSPCButler, Dunklin, Mississippi, New Madrid, Oregon, Pemiscot and 2 more5 hr

Nearby

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