Alert archive / Missouri / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 21, NWS St. Louis, MO

February 16, 2006Saint Louis County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Feb 16, 2006, 2:40 PM CST for Saint Louis County, Missouri. It was in force for 50 min. 10 reports 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: Feb 16, 2006, 2:40 PM CST (20:40 UTC)
Expired: Feb 16, 2006, 3:30 PM CST
In force: 50 min
Issued by: NWS St. Louis, MO
Area: Counties, with a storm outline in the text

County Saint Louis County, MO

The radar

The St Louis radar (KLSX), 22 km from the middle of the area, began a volume at 20:44 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
Feb 16, 2:57 PM CST	HAIL 2.75	Maryland Heights, MO
Feb 16, 3:02 PM CST	HAIL 2.5	Maryland Heights, MO
Feb 16, 3:05 PM CST	HAIL 0.75	Hazelwood, MO
Feb 16, 3:05 PM CST	HAIL 1.5	Bridgeton, MO
Feb 16, 3:05 PM CST	HAIL 3	Bridgeton, MO	AT INTERESECTION OF INTERSTATES 70 AND 270.
Feb 16, 3:05 PM CST	HAIL 3	Bridgeton, MO
Feb 16, 3:10 PM CST	HAIL 1	Florissant, MO	HAIIL COVERING GROUND.
Feb 16, 3:10 PM CST	HAIL 1.75	Florissant, MO
Feb 16, 3:15 PM CST	HAIL 1.75	Spanish Lake, MO
Feb 16, 3:15 PM CST	HAIL 2	Bellefontaine Neighbors, MO

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
Feb 16, 1:16 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.7 hours before the alert went out and 223 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 372 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 548 m²/s²
0-3 km storm-relative helicity: 589 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.1

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KLSX 162040
SVRLSX
MOC189-162130-
/O.NEW.KLSX.SV.W.0021.060216T2040Z-060216T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
240 PM CST THU FEB 16 2006

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ST. LOUIS COUNTY IN EAST CENTRAL MISSOURI

* UNTIL 330 PM CST

* AT 234 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING HAIL UP TO
  GOLF BALL SIZE.  THIS STORM WAS LOCATED 9 MILES NORTHWEST OF
  CLARKSON VALLEY...OR ABOUT NEAR DARDENNE PRAIRIE...AND MOVING
  NORTHEAST AT 65 MPH.

* LOCATIONS IMPACTED INCLUDE...
  MARYLAND HEIGHTS...
  BRIDGETON...
  ST. ANN...
  WOODSON TERRACE...
  FLORISSANT...
  HAZELWOOD...
  BERKELEY...
  FERGUSON...
  BLACK JACK...
  SPANISH LAKE...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

THIS STORM HAS A HISTORY OF PRODUCING LARGE DAMAGING HAIL. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS

LAT...LON 3871 9054 3859 9072 3866 9033 3878 9017
      3889 9029

$$

GLASS

1 follow-up statement

000 
WWUS53 KLSX 162112
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
311 PM CST THU FEB 16 2006

MOC189-162130-
/O.CON.KLSX.SV.W.0021.000000T0000Z-060216T2130Z/
ST. LOUIS MO-
311 PM CST THU FEB 16 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM CST
FOR NORTHERN ST. LOUIS COUNTY...

AT 309 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING LARGE DAMAGING
HAIL UP TO BASEBALL SIZE OVER SPANISH LAKE...MOVING NORTHEAST AT 65 
MPH.  NUMEROUS REPORTS OF LARGE HAIL TO THE SIZE OF BASEBALLS HAVE 
BEEN RECEIVED IN NORTHERN ST. LOUIS COUNTY. 

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
NORTHERN ST. LOUIS COUNTY.

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

LAT...LON 3871 9054 3859 9072 3866 9033 3878 9017
      3889 9029

$$

GLASS

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 16, 1:49 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Warren	41 min
Feb 16, 1:58 PM CST	Severe Thunderstorm Warning	LSX	Lincoln	47 min
Feb 16, 2:12 PM CST	Severe Thunderstorm Warning	LSX	Saint Charles	48 min
Feb 16, 2:26 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	49 min
Feb 16, 2:58 PM CST	Severe Thunderstorm Warning	LSX	City of Saint Louis	47 min
Feb 16, 3:17 PM CST	Severe Thunderstorm Warning	LSX	Franklin, Jefferson	43 min
Feb 16, 3:20 PM CST	Severe Thunderstorm Warning	LSX	Crawford, Washington	40 min
Feb 16, 3:33 PM CST	Tornado Warning	LSX	City of Saint Louis	42 min
Feb 16, 4:01 PM CST	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	44 min
Feb 16, 4:12 PM CST	Severe Thunderstorm Warning	LSX	Reynolds	48 min
Feb 16, 4:30 PM CST	Severe Thunderstorm Warning	LSX	Sainte Genevieve	45 min
Feb 16, 4:44 PM CST	Severe Thunderstorm Warning	LSX	Iron, Madison	61 min
Feb 16, 4:55 PM CST	Tornado Warning	LSX	Iron, Madison	35 min
Feb 16, 5:31 PM CST	Severe Thunderstorm Warning	LSX	Madison	44 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2006 Every severe thunderstorm warning in 2006

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.