Alert archive / Missouri / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 246

May 7, 20024 states

The Storm Prediction Center issued this severe thunderstorm watch at May 7, 2002, 3:00 AM CDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
May 7, 2002, 3:00 AM CDT (08:00 UTC)
Expired
May 7, 2002, 8:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 46 counties

Baxter County, AR, Fulton County, AR, Marion County, AR, Alexander County, IL, Franklin County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Randolph County, IL, Saline County, IL, Union County, IL, Washington County, IL, Wayne County, IL, White County, IL, Williamson County, IL, Crittenden County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Dent County, MO, Douglas County, MO, Howell County, MO, Iron County, MO, Madison County, MO, Oregon County, MO, Ozark County, MO, Perry County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Sainte Genevieve County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Wright County, MO

The radar

The St Louis radar (KLSX), 143 km from the middle of the area, began a volume at 08:02 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.

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.0 hours before the alert went out and 263 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, Springfield, MO at 00:00Z on 2002-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2395 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, Springfield, MO at 00:00Z on 2002-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 154 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
2395 J/kg
Mixed-layer CIN
-65 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
154 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
1.5
Supercell composite
5.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 7, 3:00 PM CDTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Fulton, Izard and 1 more6 hr
May 7, 12:45 AM CDTSevere Thunderstorm WatchSPCBond, Calhoun, Christian, Clinton, Fayette, Greene and 9 more5 hr
May 7, 3:45 AM CDTSevere Thunderstorm WatchSPCClark, Clay, Coles, Crawford, Cumberland, Edwards and 12 more5 hr
May 6, 10:00 PM CDTSevere Thunderstorm WatchSPCAudrain, Bates, Benton, Boone, Buchanan, Caldwell and 26 more6 hr
May 7, 3:30 PM CDTSevere Thunderstorm WatchSPCAtchison5 hr

Nearby

Severe Thunderstorm Watches in Missouri, 2002Severe Thunderstorm Watches in Illinois, 2002Severe Thunderstorm Watches in Arkansas, 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.