Alert archive / Missouri / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 426, NWS St. Louis, MO

August 23, 2000Ralls County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 23, 2000, 10:04 PM CDT for Ralls County, Missouri. It was in force for 41 min. 2 reports came from 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, with what was reported inside it.

The facts

Issued: Aug 23, 2000, 10:04 PM CDT (03:04 UTC)
Expired: Aug 23, 2000, 10:45 PM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Ralls County, MO

What was reported inside it

Time	Report	Where	Remark
Aug 23, 10:25 PM CDT	Thunderstorm Wind 55 E	Center, MO	Amateur radio spotters reported trees and power lines down in Center.
Aug 23, 10:50 PM CDT	Thunderstorm Wind 55 E	New London, MO	Local law enforcement reported trees and power lines down in town.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 23, 9:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.1 hours before the alert went out and 247 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: 996 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 1022 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 95 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 240305
SVRSTL
MOC173-240345-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
1004 PM CDT WED AUG 23 2000

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  RALLS COUNTY IN NORTHEAST MISSOURI

* UNTIL 1045 PM CDT

* AT 1004 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES SOUTHEAST OF MONROE CITY...MOVING
  SOUTHEAST AT 40 MPH.

* LOCATIONS IN THE PATH...
  RENSSELAER
  SPAULDING
  CENTER
  NEW LONDON
  THE LANDING

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 3969 9172 3934 9173 3932 9146 3946 9146
          3960 9121 3969 9132

GKS

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 23, 3:47 PM CDT, 6 hours 17 minutes earlier.

Area forecast discussion, Aug 23, 3:47 PM CDT, 6 hours 17 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ST LOUIS MO
330 PM WED AUG 23 2000

CONVECTION HAS BGN TO DVLP THIS AFTN IN NERN MO AND S CNTRL MO ALNG
OLD OUTFLOW BOUNDARIES S OF STNRY FNT EXTDG FM SRN NEBRASKA ENE THRU
NRN IL.  WKST CIN ACRS SRN MO AND A SMALL PORTION OF NERN MO WITH
CAPE OVR 4000 J/KG OVR PARTS OF NERN MO.  CONVECTION ACRS SRN MO
SHOULD BE DIURNAL...WKNG JUST AFT SUNSET...BUT ACTIVITY SHOULD BCM
MORE ORGANIZED ALONG STATIONARY FNT AS SHRTWV OVR NWRN IA ERN NE
DROPS SEWD THRU ERN MO IL LTR TGT.  MDLS DEPICT AN AREA OF UPR
DIVERGENCE ACRS ERN MO CNTRL SRN IL TGT IN RGT ENTRANCE REGION OF
ULJ STRK MOVG THRU OH VLY.  NGM...ETA AND MESOETA FAIRLY SIMILIAR
WITH HIGHEST QPF OVR NERN MO THIS EVNG DROPPING SEWD ALNG
MISSISSIPPI RVR.  18Z MESOETA SHOW INDICATIONS OF AN MCS WITH
CONVECTIVELY INDUCED VORT MAX AND OUTFLOW BOUNDARY...BUBBLE HI MOVG
SWD THRU ERN MO LT TGT.  WL INCRS POPS TGT WITH SEWD MOVG MCS
LIKELY.  PCPN CHANCES WL LIKELY SHIFT S THU AFTN AND EVNG WITH MCV
AND OUFLOW BOUNDARY...ALTHOUGH STNRY FNT WL PROBABLY ONLY DROP AS
FAR S AS NRN MO.  TEMPS SHOULD BE A COUPLE OF DGRS COOLER THU WITH
MRNG PCPN AND MCS CLOUD DEBRIS +INTO THE AFTN.

.STL...NONE
GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 23, 9:52 PM CDT	Severe Thunderstorm Warning	LSX	Marion, Shelby	38 min
Aug 23, 10:03 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Monroe	42 min
Aug 23, 10:03 PM CDT	Severe Thunderstorm Warning	LSX	Boone	42 min
Aug 23, 10:36 PM CDT	Severe Thunderstorm Warning	LSX	Audrain	39 min
Aug 23, 10:40 PM CDT	Severe Thunderstorm Warning	LSX	Pike	50 min
Aug 23, 10:45 PM CDT	Severe Thunderstorm Warning	LSX	Ralls	30 min
Aug 23, 10:46 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	59 min
Aug 23, 10:58 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	62 min
Aug 23, 11:02 PM CDT	Tornado Warning	LSX	Montgomery	28 min
Aug 23, 11:07 PM CDT	Severe Thunderstorm Warning	LSX	Warren	53 min
Aug 23, 11:21 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	54 min
Aug 23, 11:40 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	65 min
Aug 23, 11:45 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	45 min
Aug 23, 11:57 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	63 min
Aug 24, 1:36 AM CDT	Flash Flood Warning	LSX	Audrain, Montgomery	5 hr
Aug 24, 2:28 AM CDT	Flash Flood Warning	LSX	Franklin, Warren	5 hr

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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.