Alert archive / Missouri / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 187

April 30, 200218 counties in Arkansas; 24 counties in Missouri

The Storm Prediction Center issued this severe thunderstorm watch at Apr 30, 2002, 9:30 AM CDT for 18 counties in Arkansas; 24 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 30, 2002, 9:30 AM CDT (14:30 UTC)
Expired
Apr 30, 2002, 3:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 42 counties

Baxter County, AR, Boone County, AR, Carroll County, AR, Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Marion County, AR, Poinsett County, AR, Randolph County, AR, Sharp County, AR, Stone County, AR, Barry County, MO, Butler County, MO, Carter County, MO, Cedar County, MO, Christian County, MO, Dade County, MO, Dallas County, MO, Douglas County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Laclede County, MO, Lawrence County, MO, Oregon County, MO, Ozark County, MO, Polk County, MO, Ripley County, MO, Shannon County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Webster County, MO, Wright County, MO

The radar

The Springfield radar (KSGF), 80 km from the middle of the area, began a volume at 14:33 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

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

IssuedProductOfficeCountiesLasted
Apr 30, 9:30 AM CDTSevere Thunderstorm WarningSGFChristian, Greene60 min
Apr 30, 9:38 AM CDTTornado WarningSGFDouglas, Ozark52 min
Apr 30, 9:42 AM CDTSevere Thunderstorm WarningMEGCrittenden, St. Francis33 min
Apr 30, 9:44 AM CDTSevere Thunderstorm WarningLZKStone16 min
Apr 30, 9:44 AM CDTSevere Thunderstorm WarningSGFTaney61 min
Apr 30, 9:52 AM CDTSevere Thunderstorm WarningSGFDallas, Webster53 min
Apr 30, 9:55 AM CDTSevere Thunderstorm WarningSGFHowell65 min
Apr 30, 9:58 AM CDTTornado WarningSGFChristian47 min
Apr 30, 10:33 AM CDTSevere Thunderstorm WarningSGFOregon57 min
Apr 30, 10:35 AM CDTSevere Thunderstorm WarningSGFOzark55 min
Apr 30, 10:55 AM CDTSevere Thunderstorm WarningLZKFulton35 min
Apr 30, 10:57 AM CDTSevere Thunderstorm WarningSGFHowell63 min
Apr 30, 10:58 AM CDTSevere Thunderstorm WarningLZKFulton32 min
Apr 30, 10:59 AM CDTSevere Thunderstorm WarningLZKSharp31 min
Apr 30, 11:03 AM CDTSevere Thunderstorm WarningLZKBaxter27 min
Apr 30, 11:16 AM CDTSevere Thunderstorm WarningMEGRandolph29 min
Apr 30, 11:20 AM CDTSevere Thunderstorm WarningTSACarroll, Madison40 min
Apr 30, 11:26 AM CDTSevere Thunderstorm WarningLZKFulton, Izard34 min
Apr 30, 11:28 AM CDTSevere Thunderstorm WarningLZKSharp32 min
Apr 30, 11:41 AM CDTSevere Thunderstorm WarningMEGLawrence, Randolph34 min
Apr 30, 11:47 AM CDTSevere Thunderstorm WarningLZKBoone43 min
Apr 30, 11:59 AM CDTSevere Thunderstorm WarningMEGCraighead31 min
Apr 30, 12:02 PM CDTSevere Thunderstorm WarningLZKSharp13 min
Apr 30, 12:10 PM CDTSevere Thunderstorm WarningMEGLawrence35 min
Apr 30, 12:13 PM CDTSevere Thunderstorm WarningMEGGreene32 min
Apr 30, 12:25 PM CDTSevere Thunderstorm WarningLZKJackson20 min
Apr 30, 12:25 PM CDTSevere Thunderstorm WarningMEGCraighead, Poinsett35 min
Apr 30, 12:54 PM CDTSevere Thunderstorm WarningMEGMississippi, Poinsett36 min
Apr 30, 1:04 PM CDTSevere Thunderstorm WarningLZKBaxter, Stone26 min
Apr 30, 1:08 PM CDTSevere Thunderstorm WarningMEGCross37 min
Apr 30, 1:09 PM CDTSevere Thunderstorm WarningSGFCedar, St. Clair21 min
Apr 30, 1:34 PM CDTSevere Thunderstorm WarningSGFHickory41 min
Apr 30, 1:45 PM CDTSevere Thunderstorm WarningMEGCrittenden30 min
Apr 30, 1:55 PM CDTSevere Thunderstorm WarningSGFDallas, Polk35 min
Apr 30, 2:22 PM CDTSevere Thunderstorm WarningSGFLaclede38 min

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 2.5 hours before the alert went out and 114 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 2002-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 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 2002-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 69 square meters per square second.1939587897117Sfc1 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
40 J/kg
Mixed-layer CIN
-440 J/kg
Mixed-layer LCL
1432 m above ground
0-6 km bulk shear
65 kt
0-1 km storm-relative helicity
69 m²/s²
0-3 km storm-relative helicity
241 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 30, 10:00 AM CDTSevere Thunderstorm WatchSPCMississippi5 hr
Apr 30, 2:00 PM CDTSevere Thunderstorm WatchSPCMississippi6 hr
Apr 30, 3:00 PM CDTSevere Thunderstorm WatchSPCBollinger, Butler, Cape Girardeau, Carter, Dent, Douglas and 18 more5 hr

Nearby

Severe Thunderstorm Watches in Missouri, 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.