Alert archive / Missouri / Tornado Watches in 2000

Tornado Watch 180

April 19, 20009 counties in Illinois; 41 counties in Missouri

The Storm Prediction Center issued this tornado watch at Apr 19, 2000, 10:00 PM CDT for 9 counties in Illinois; 41 counties in Missouri. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Apr 19, 2000, 10:00 PM CDT (03:00 UTC)
Expired
Apr 20, 2000, 4:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 50 counties

Adams County, IL, Brown County, IL, Cass County, IL, Fulton County, IL, Hancock County, IL, McDonough County, IL, Pike County, IL, Schuyler County, IL, Scott County, IL, Audrain County, MO, Benton County, MO, Boone County, MO, Callaway County, MO, Camden County, MO, Cedar County, MO, Clark County, MO, Cole County, MO, Cooper County, MO, Dade County, MO, Dallas County, MO, Gasconade County, MO, Greene County, MO, Hickory County, MO, Howard County, MO, Jasper County, MO, Knox County, MO, Laclede County, MO, Lawrence County, MO, Lewis County, MO, Lincoln County, MO, Maries County, MO, Marion County, MO, Miller County, MO, Moniteau County, MO, Monroe County, MO, Montgomery County, MO, Morgan County, MO, Osage County, MO, Pettis County, MO, Phelps County, MO, Pike County, MO, Polk County, MO, Pulaski County, MO, Ralls County, MO, Randolph County, MO, Shelby County, MO, St. Clair County, MO, Warren County, MO, Webster County, MO, Wright County, MO

The radar

The Pleasant Hill radar (KEAX), 146 km from the middle of the area, began a volume at 03:02 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

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

IssuedProductOfficeCountiesLasted
Apr 19, 10:03 PM CDTTornado WarningSGFSt. Clair57 min
Apr 19, 10:10 PM CDTTornado WarningSGFCedar, Vernon65 min
Apr 19, 10:58 PM CDTTornado WarningSGFHickory, St. Clair47 min
Apr 19, 11:10 PM CDTSevere Thunderstorm WarningILXFulton, Mason50 min
Apr 19, 11:57 PM CDTSevere Thunderstorm WarningSGFCamden33 min
Apr 20, 12:12 AM CDTSevere Thunderstorm WarningSGFMiller, Morgan33 min
Apr 20, 1:13 AM CDTSevere Thunderstorm WarningSGFBarton, Jasper47 min
Apr 20, 1:17 AM CDTSevere Thunderstorm WarningSGFDade43 min
Apr 20, 1:23 AM CDTSevere Thunderstorm WarningSGFCedar52 min
Apr 20, 1:28 AM CDTSevere Thunderstorm WarningSGFBarry, Lawrence47 min
Apr 20, 1:31 AM CDTTornado WarningSGFBarton, Cedar, Dade29 min
Apr 20, 1:34 AM CDTSevere Thunderstorm WarningEAXJohnson, Lafayette, Pettis, Saline71 min
Apr 20, 1:43 AM CDTSevere Thunderstorm WarningSGFSt. Clair47 min
Apr 20, 1:47 AM CDTSevere Thunderstorm WarningSGFChristian, Greene43 min
Apr 20, 1:57 AM CDTSevere Thunderstorm WarningSGFBenton, Hickory48 min
Apr 20, 2:11 AM CDTSevere Thunderstorm WarningSGFDallas, Polk, Webster49 min
Apr 20, 2:40 AM CDTSevere Thunderstorm WarningSGFLaclede, Wright50 min
Apr 20, 2:52 AM CDTSevere Thunderstorm WarningSGFCamden, Pulaski38 min
Apr 20, 3:05 AM CDTSevere Thunderstorm WarningSGFMaries, Miller55 min
Apr 20, 3:05 AM CDTSevere Thunderstorm WarningSGFPhelps55 min
Apr 20, 3:21 AM CDTSevere Thunderstorm WarningLSXCole, Osage54 min
Apr 20, 3:38 AM CDTSevere Thunderstorm WarningLSXCrawford, Gasconade52 min
Apr 20, 3:46 AM CDTSevere Thunderstorm WarningLSXAdams49 min
Apr 20, 3:53 AM CDTSevere Thunderstorm WarningLSXCallaway, Montgomery47 min

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 3.0 hours before the alert went out and 198 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 2000-04-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1428 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 2000-04-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 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
1428 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
1062 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
1.2
Supercell composite
12.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

376 
WWUS9 KMKC 200233
SEL0  
MKC WW 200233
ILZ000-MOZ000-200900-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 180
STORM PREDICTION CENTER NORMAN OK
933 PM CDT WED APR 19 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   WESTERN ILLINOIS                           
   CENTRAL AND NORTHEAST MISSOURI                           

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 1000 PM
UNTIL 400 AM CDT.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 60 STATUTE MILES EAST AND WEST
OF A LINE FROM 15 MILES SOUTH SOUTHWEST OF SPRINGFIELD MISSOURI TO
45 MILES NORTH NORTHEAST OF QUINCY ILLINOIS.

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. 
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.

OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH
NUMBER 177.  WATCH NUMBER 177 WILL NOT BE IN EFFECT AFTER 1000 PM
CDT.  CONTINUE...WW 176...WW 178...WW 179...

DISCUSSION...SUPERCELLS ALONG THE KS/MO BORDER SHOULD TRACK ENEWD
ACROSS MO AND EVENTUALLY INTO WRN IL OVERNIGHT. LATEST VWP FROM SGF
INDICATES SR-HELICITY OF 350-400 M2/S2...INDICATING A THREAT FOR A
FEW TORNADOES.


AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES.  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 25030.


...VESCIO

370,0943 403,0920 403,0894 370,0922

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 19, 8:45 PM CDTSevere Thunderstorm WatchSPCJo Daviess4 hr
Apr 20, 12:45 AM CDTSevere Thunderstorm WatchSPCBoone, Bureau, Carroll, Cook, DeKalb, DuPage and 28 more5 hr
Apr 20, 3:15 AM CDTSevere Thunderstorm WatchSPCAlexander, Jackson, Perry, Randolph, Union5 hr
Apr 20, 4:15 AM CDTSevere Thunderstorm WatchSPCAdams, Bond, Boone, Brown, Bureau, Calhoun and 61 more6 hr
Apr 20, 10:00 AM CDTTornado WatchSPCBond, Champaign, Clark, Clay, Clinton, Coles and 30 more6 hr
Apr 19, 8:15 PM CDTTornado WatchSPCAdair, Andrew, Barton, Bates, Buchanan, Caldwell and 27 more6 hr
Apr 20, 12:30 AM CDTSevere Thunderstorm WatchSPCBarry, Christian, Douglas, McDonald, Newton, Ozark and 2 more6 hr

Nearby

Tornado Watches in Missouri, 2000Tornado Watches in Illinois, 2000Every tornado 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; radar from the NEXRAD Level II archive.