Alert archive / Missouri / Severe Thunderstorm Warnings in 2004

Severe Thunderstorm Warning 271, NWS St. Louis, MO

August 25, 2004Lincoln County, Saint Charles County, Warren County, Missouri; Calhoun County, Jersey County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Aug 25, 2004, 5:23 PM CDT for Lincoln County, Saint Charles County, Warren County, Missouri; Calhoun County, Jersey County, Illinois. It was in force for 22 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 25, 2004, 5:23 PM CDT (22:23 UTC)
Expired: Aug 25, 2004, 5:45 PM CDT
In force: 22 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

Counties Calhoun County, IL, Jersey County, IL, Lincoln County, MO, Saint Charles County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 31 km from the middle of the area, began a volume at 22:23 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.

What was reported inside it

Time	Report	Where	Remark
Aug 25, 5:48 PM CDT	TSTM WND DMG	Elsah, IL	NUMEROUS LARGE TREE LIMBS 12 TO 18 INCHES IN DIAMETER DOWN IN TOWN. LARGE LIMBS BLOCKING ROADWAYS IN TOWN.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

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 25, 12:35 PM CDT	Tornado Watch	SPC	6 hr
Aug 25, 2:20 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.4 hours before the alert went out and 217 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: 1166 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 179 m²/s²
0-3 km storm-relative helicity: 201 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 252223
SVRLSX
ILC013-083-MOC113-183-219-252245-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
519 PM CDT WED AUG 25 2004

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI
  ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI
  WARREN COUNTY IN EAST CENTRAL MISSOURI
  SOUTHEASTERN CALHOUN COUNTY IN SOUTHWEST ILLINOIS
  JERSEY COUNTY IN SOUTHWEST ILLINOIS

* UNTIL 545 PM CDT

* AT 519 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SEVERE THUNDERSTORMS STRETCHING FROM NORTHERN CALHOUN
  COUNTY ILLINOIS SOUTHWEST TO NEAR WARRENTON IN WARREN COUNTY
  MISSOURI. THE LINE WAS MOVING EAST AT 50 MPH. THE PRIMARY THREAT
  FROM THIS STORM WILL BE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  HARDIN
  BRUSSELS
  GRAFTON
  JERSEYVILLE
  OLD MONROE
  ST. PETERS
  ST. CHARLES
  WENTZVILLE
  NEW MELLE

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.

A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER...
SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE
WARNING.

LAT...LON 3919 9060 3922 9014 3900 9026 3888 9032
      3859 9101 3872 9137

$$
JPK

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 25, 1:52 PM CDT	Flash Flood Warning	LSX	Marion, Pike, Ralls	4 hr
Aug 25, 2:26 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Callaway, Montgomery	49 min
Aug 25, 3:14 PM CDT	Flash Flood Warning	LSX	Marion	4 hr
Aug 25, 3:22 PM CDT	Severe Thunderstorm Warning	LSX	Audrain	38 min
Aug 25, 3:44 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole	46 min
Aug 25, 3:56 PM CDT	Flash Flood Warning	LSX	Audrain	4 hr
Aug 25, 4:26 PM CDT	Severe Thunderstorm Warning	LSX	Montgomery	34 min
Aug 25, 4:32 PM CDT	Severe Thunderstorm Warning	LSX	Callaway	43 min
Aug 25, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Shelby	30 min
Aug 25, 5:51 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	39 min
Aug 25, 6:53 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson	37 min
Aug 25, 6:58 PM CDT	Severe Thunderstorm Warning	LSX	Crawford	47 min
Aug 25, 12:37 PM CDT	Severe Thunderstorm Warning	LSX	Pike	38 min
Aug 25, 5:27 PM CDT	Severe Thunderstorm Warning	LSX	Greene	33 min
Aug 25, 5:31 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin	44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2004 Severe Thunderstorm Warnings in Illinois, 2004 Every severe thunderstorm warning in 2004

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.