Alert archive / Missouri / Severe Thunderstorm Watches in 2000

Severe Thunderstorm Watch 274

May 12, 200012 counties in Illinois; 32 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at May 12, 2000, 4:30 PM CDT for 12 counties in Illinois; 32 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 12, 2000, 4:30 PM CDT (21:30 UTC)
Expired
May 12, 2000, 10:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 44 counties

Bond County, IL, Calhoun County, IL, Clinton County, IL, Effingham County, IL, Fayette County, IL, Jersey County, IL, Madison County, IL, Monroe County, IL, Montgomery County, IL, Randolph County, IL, Saint Clair County, IL, Washington County, IL, Carter County, MO, Christian County, MO, City of Saint Louis, MO, Crawford County, MO, Dent County, MO, Douglas County, MO, Franklin County, MO, Gasconade County, MO, Howell County, MO, Iron County, MO, Jefferson County, MO, Laclede County, MO, Lincoln County, MO, Madison County, MO, Maries County, MO, Oregon County, MO, Ozark County, MO, Phelps County, MO, Pulaski County, MO, Reynolds County, MO, Saint Charles County, MO, Saint Francois County, MO, Saint Louis County, MO, Sainte Genevieve County, MO, Shannon County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Warren County, MO, Washington County, MO, Webster County, MO, Wright County, MO

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 12, 4:37 PM CDTSevere Thunderstorm WarningLSXFranklin, Saint Charles, Saint Louis38 min
May 12, 4:45 PM CDTSevere Thunderstorm WarningSGFChristian, Douglas, Webster45 min
May 12, 5:02 PM CDTSevere Thunderstorm WarningLSXJersey, Macoupin48 min
May 12, 5:42 PM CDTSevere Thunderstorm WarningLSXMontgomery58 min
May 12, 6:01 PM CDTSevere Thunderstorm WarningLSXBond, Madison64 min
May 12, 6:05 PM CDTTornado WarningLSXBond, Madison50 min
May 12, 6:49 PM CDTTornado WarningLSXFayette51 min
May 12, 6:54 PM CDTSevere Thunderstorm WarningSGFHowell, Ozark51 min
May 12, 7:01 PM CDTSevere Thunderstorm WarningLSXClinton, Saint Clair64 min
May 12, 7:01 PM CDTSevere Thunderstorm WarningLSXBond64 min
May 12, 7:10 PM CDTSevere Thunderstorm WarningSGFHowell, Shannon, Texas50 min
May 12, 7:18 PM CDTTornado WarningILXClay, Effingham57 min
May 12, 7:33 PM CDTSevere Thunderstorm WarningSGFHowell, Oregon, Shannon57 min
May 12, 7:40 PM CDTSevere Thunderstorm WarningLSXWashington50 min
May 12, 8:12 PM CDTSevere Thunderstorm WarningPAHCarter48 min
May 12, 8:17 PM CDTSevere Thunderstorm WarningLSXReynolds48 min
May 12, 9:55 PM CDTSevere Thunderstorm WarningLSXIron, Reynolds50 min

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 9.5 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, Springfield, MO at 12:00Z on 2000-05-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2122 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 12:00Z on 2000-05-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 384 square meters per square second.19395878Sfc1 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
2122 J/kg
Mixed-layer CIN
-431 J/kg
Mixed-layer LCL
1130 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
384 m²/s²
0-3 km storm-relative helicity
409 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 11, 10:30 PM CDTTornado WatchSPCBoone, Carroll, DeKalb, Jo Daviess, Lee, McHenry and 6 more6 hr
May 12, 2:00 PM CDTTornado WatchSPCCass, Champaign, Christian, Coles, Cook, Cumberland and 28 more6 hr
May 12, 6:30 PM CDTTornado WatchSPCClark, Clay, Crawford, Jasper, Lawrence, Richland6 hr
May 11, 7:00 PM CDTSevere Thunderstorm WatchSPCAndrew, Buchanan, Caldwell, Clay, Clinton, Daviess and 13 more5 hr
May 12, 12:00 AM CDTSevere Thunderstorm WatchSPCAndrew, Buchanan, Caldwell, Carroll, Cass, Clay and 11 more5 hr
May 12, 2:00 AM CDTSevere Thunderstorm WatchSPCAtchison, Gentry, Harrison, Holt, Mercer, Nodaway and 3 more5 hr

Nearby

Severe Thunderstorm Watches in Missouri, 2000Severe Thunderstorm Watches in Illinois, 2000Every severe thunderstorm watch in 2000

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.