Alert archive / Missouri / Severe Thunderstorm Warnings in 2003

Severe Thunderstorm Warning 210, NWS St. Louis, MO

July 18, 2003Sainte Genevieve County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 18, 2003, 7:08 PM CDT for Sainte Genevieve County, Missouri. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 18, 2003, 7:08 PM CDT (00:08 UTC)
Expired: Jul 18, 2003, 8:00 PM CDT
In force: 52 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 00:09 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 watch it was issued in

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

Issued	Product	Office	Lasted
Jul 18, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.1 hours before the alert went out and 280 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: 1125 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 690 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 190008
SVRLSX
MOC186-190100-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
708 PM CDT FRI JUL 18 2003

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI

* UNTIL 800 PM CDT

* AT 708 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER ROCKY RIDGE...MOVING SOUTHEAST AT 45 MPH.
  THE PRIMARY THREAT FROM THIS STORM WILL BE DAMAGING HAIL.

* LOCATIONS IMPACTED INCLUDE...
  WEINGARTEN
  COFFMAN

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 3812 9025 3805 9041 3767 9021 3789 8995

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 7:16 PM CDT	Severe Thunderstorm Warning	LSX	Madison	29 min
Jul 18, 7:42 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	33 min
Jul 18, 8:23 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	52 min
Jul 18, 8:58 PM CDT	Severe Thunderstorm Warning	LSX	Madison	47 min
Jul 18, 9:04 PM CDT	Severe Thunderstorm Warning	LSX	Washington	41 min
Jul 18, 10:09 PM CDT	Flash Flood Warning	LSX	Moniteau	4 hr
Jul 18, 10:19 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Washington	41 min
Jul 18, 10:23 PM CDT	Severe Thunderstorm Warning	LSX	Moniteau	37 min
Jul 18, 10:59 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	46 min
Jul 18, 11:35 PM CDT	Severe Thunderstorm Warning	LSX	Moniteau	40 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2003 Every severe thunderstorm warning in 2003

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.