Alert archive / Missouri / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 390, NWS St. Louis, MO

August 17, 2000Moniteau County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 17, 2000, 6:49 PM CDT for Moniteau County, Missouri. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Aug 17, 2000, 6:49 PM CDT (23:49 UTC)
Expired: Aug 17, 2000, 7:15 PM CDT
In force: 26 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Moniteau County, MO

The radar

The Pleasant Hill radar (KEAX), 146 km from the middle of the area, began a volume at 23:51 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

Topeka, KS (KTOP), launched 12:00Z, 11.8 hours before the alert went out and 267 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 451 J/kg
Mixed-layer CIN: -284 J/kg
Mixed-layer LCL: 2093 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 172350
SVRSTL
MOC135-180015-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
649 PM CDT THU AUG 17 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MONITEAU COUNTY IN CENTRAL MISSOURI

* UNTIL 715 PM CDT

* AT 649 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER JAMESTOWN...MOVING NORTHEAST AT 10 MPH.

* LOCATIONS IN THE PATH...
  RURAL NORTHEASTERN MONITEAU COUNTY


SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME
OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO
AREAS WHERE WATER COVERS THE ROAD.

LAT...LON 3869 9264 3860 9284 3841 9250 3882 9239
          3893 9252

LENNING

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS St. Louis, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 17, 4:00 PM CDT, 2 hours 49 minutes earlier.

Area forecast discussion, Aug 17, 4:00 PM CDT, 2 hours 49 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
400 PM CDT THU AUG 17 2000

20Z MSAS DATA INDICATES CDFNT ENTERING NRN SXNS OF FA...EXTDG FM
NERN MO (JUST E OF KIRK) SWWD THRU W CNTRL MO INTO SERN KS.  MDT-STG
LLVL CONV IND ALG/JUST AHD OF FNT WITH LI/S AOB -10 AND CAPES ARND
5000 J/KG.  BAND OF LLVL CONV FINALLY ENTERING RGN OF WK ENUF
SFC-BASED CAP TO BEGIN TO DVLP CU FIELDS ACRS CNTRL/NERN MO.  TSTM
DVLPMT XPCTD TO BE IMMINENT.  SUM POST-FNTL PCPN ALSO EXISTS OVR NRN
MO/SRN IA AS A RESULT OF MID LVL S/W.

FCST PROB FOR THE AFTN PACKAGE IS PCPN CHCS TNGT AND THEN TEMPS FRI
THRU SAT.

12Z MODELS IN GOOD AGRMT THRU 48HRS.  S/W OVR NRN MO/SRN IA WL MOV
EWD THRU CNTRL IL TNGT.  RDG AXIS OVR ERN ROCKIES WL SLIDE EWD INTO
PLNS BY SAT...PROMOTING A W TO NWLY UPR FLO THRU PD.  APPEARS A
CONVECTIVELY INDUCED VORT MX WL TRY TO UNDERCUT RDG ON SAT AND MOV
INTO NRN/WRN ZONES.  ON SFC FEATURES...CDFNT WL MOV THRU MOST OF FA
THIS EVNG...AND THEN THRU RMNDR SRN ZONES OVRNGT.  CANADIAN HI PRES
WL THEN DOMINATE RGN THRU FRI NGT...WITH A WRMFNT THEN SLIDING INTO
WRN MO ON SAT.

FOR TNGT...HAVE EVERY REASON TO BELIEVE BKN LN OF CONVECTION WL DVLP
SOON...ACRS CNTRL-NERN MO AND THIS LN WL TRACK W/ FNT THRU MOST OF
FA.  PWAT VALUES ARND 2 INCHES...MDT-STG LLVL CONV...AND HI INSTAB
AIRMASS SHD FAVOR THAT SCENARIO.  VORT MX WL KEEP POST-FNTL PCPN
GOING ACRS NRN ZONES THIS EVNG...THOUGH THEY MISS MUCH OF THE BKN LN
OF TSTMS THAT SHD DVLP SOON.  WENT MUCH ABV GUIDANCE POPS...BUT
TENDED TO FOLLOW GUIDANCE TEMPS.

FOR FRI...CANADIAN AIRMASS TO DOMINATE WX-SCENE...WITH VERY AUTUMN
LIKE SITN SETTING UP.  SHD SEE EXTENSIVE MVFR CIG DECK ACRS
CNTRL/NRN ZONES IN MRNG...AND WL BREAK UP SOMEWHAT FM S TO N DURG
AFTN.  N-NELY SFC WNDS AND CLDS SHD RESULT IN TEMPS ABT 20 DEG
COOLER THAN TDA...AND TENDED TO GO AOB GUIDANCE TEMPS.

FOR SAT...CONVECTION TO OUR W WL SPREAD HI CLD DECK OVR ERL IN PD.
MODELS ALL INDICATING TO ENUF MOISTURE RTRN IN WRN/NRN ZONES WITH
UPR LVL DYNAMICS TO WARRANT RAIN CHCS IN AFTN THESE AREAS.  OTRW...
ELY LLVL FLOW/CLDS WL KEEP TEMPS IN CHECK.

.STL...NONE
TES

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 17, 5:16 PM CDT	Severe Thunderstorm Warning	LSX	Lewis	44 min
Aug 17, 5:54 PM CDT	Severe Thunderstorm Warning	LSX	Moniteau	51 min
Aug 17, 6:33 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Cole	42 min
Aug 17, 6:38 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion	52 min
Aug 17, 6:48 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	42 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2000 Every severe thunderstorm warning 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.