Alert archive / Missouri / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 39, NWS St. Louis, MO

April 3, 20144 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 3, 2014, 6:31 PM CDT for 4 counties in Missouri. It was in force for 44 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: Apr 3, 2014, 6:31 PM CDT (23:31 UTC)
Expired: Apr 3, 2014, 7:15 PM CDT
In force: 44 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 70.0 mph

Counties Franklin County, MO, Gasconade County, MO, Saint Charles County, MO, Warren County, MO

The radar

The St Louis radar (KLSX), 59 km from the middle of the area, began a volume at 23:32 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
Apr 3, 6:41 PM CDT	HAIL 0.25	1 E Drake, MO	ALSO 40 MPH WINDS.

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
Apr 3, 4:58 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 290 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: 440 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 259 m²/s²
0-3 km storm-relative helicity: 365 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.

671 
WUUS53 KLSX 032331
SVRLSX
MOC071-073-183-219-040015-
/O.NEW.KLSX.SV.W.0039.140403T2331Z-140404T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
631 PM CDT THU APR 3 2014

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN FRANKLIN COUNTY IN EAST CENTRAL MISSOURI...
  GASCONADE COUNTY IN EAST CENTRAL MISSOURI...
  WESTERN ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...
  SOUTHERN WARREN COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 715 PM CDT

* AT 628 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR DRAKE...AND
  MOVING EAST AT 50 MPH.

  HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE
           TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
           ROOFS AND OUTBUILDINGS.

* LOCATIONS IMPACTED INCLUDE...
  HERMANN...NEW HAVEN...ST. CLAIR...UNION...WASHINGTON...VILLA
  RIDGE...WENTZVILLE...SWISS...ROSEBUD...GERALD...BEAUFORT...
  TRELOAR...PARKWAY...MARTHASVILLE...DUTZOW...AUGUSTA...NEW MELLE...
  BERGER...LESLIE AND NOSER MILL.

THIS WARNING INCLUDES DEUTSCHHEIM HISTORIC SITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMAIN ALERT FOR A POSSIBLE TORNADO! TORNADOES CAN DEVELOP QUICKLY
FROM SEVERE THUNDERSTORMS. IF YOU SPOT A TORNADO GO AT ONCE INTO THE
BASEMENT OR SMALL CENTRAL ROOM IN A STURDY STRUCTURE.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS. PEOPLE OUTSIDE
SHOULD MOVE TO A SHELTER...INSIDE A STRONG BUILDING AND AWAY FROM
WINDOWS.

&&

LAT...LON 3868 9164 3869 9161 3867 9155 3869 9151
      3871 9149 3871 9142 3888 9083 3887 9082
      3832 9084 3831 9164
TIME...MOT...LOC 2331Z 254DEG 43KT 3850 9149

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH

$$

BRITT

1 follow-up statement

738 
WWUS53 KLSX 032349
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
649 PM CDT THU APR 3 2014

MOC071-073-183-219-040015-
/O.CON.KLSX.SV.W.0039.000000T0000Z-140404T0015Z/
FRANKLIN MO-GASCONADE MO-ST. CHARLES MO-WARREN MO-
649 PM CDT THU APR 3 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
WARREN...WESTERN ST. CHARLES...GASCONADE AND NORTHERN FRANKLIN
COUNTIES UNTIL 715 PM CDT...

AT 645 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED 6 MILES NORTHEAST
OF DRAKE...AND MOVING EAST AT 35 MPH.

HAZARD...60 MPH WIND GUSTS AND QUARTER SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT WIND DAMAGE TO
         ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
NEW HAVEN...WASHINGTON...UNION...VILLA RIDGE...ST. CLAIR...
WENTZVILLE...BEAUFORT...TRELOAR...MARTHASVILLE...DUTZOW...AUGUSTA...
NEW MELLE...PARKWAY...BERGER...LESLIE...NOSER MILL...LYON...
HOLSTEIN...MOSELLE AND FORISTELL.

THIS WARNING INCLUDES DEUTSCHHEIM HISTORIC SITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE
TO A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT
OR SMALL INTERIOR ROOM.

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 3831 9164 3832 9164 3867 9155 3869 9151
      3871 9149 3871 9142 3888 9083 3887 9082
      3832 9084
TIME...MOT...LOC 2349Z 257DEG 29KT 3852 9134

HAIL...1.00IN
WIND...60MPH

$$

BRITT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 2, 8:55 PM CDT	River Flood Warning	LSX	Lincoln	60 hr
Apr 3, 2:19 AM CDT	Areal Flood Advisory	LSX	Boone, Moniteau	3 hr
Apr 3, 3:06 AM CDT	Flash Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	6 hr
Apr 3, 4:55 AM CDT	Flash Flood Warning	LSX	Gasconade, Osage	6 hr
Apr 3, 5:05 AM CDT	Severe Thunderstorm Warning	LSX	Saint Louis	40 min
Apr 3, 5:19 AM CDT	Severe Thunderstorm Warning	LSX	City of Saint Louis	56 min
Apr 3, 5:23 AM CDT	Tornado Warning Tornado observed	LSX	Saint Louis, City of Saint Louis	37 min
Apr 3, 6:15 AM CDT	River Flood Warning	LSX	Cole	64 hr
Apr 3, 8:11 AM CDT	Areal Flood Advisory	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	3 hr
Apr 3, 8:18 AM CDT	River Flood Warning	LSX	Osage	30 hr
Apr 3, 8:58 AM CDT	River Flood Warning	LSX	Monroe	4 days
Apr 3, 9:11 AM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	49 min
Apr 3, 9:23 AM CDT	Areal Flood Warning	LSX	Boone, Callaway, Cole, Moniteau	3 hr
Apr 3, 12:03 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	42 min
Apr 3, 1:00 PM CDT	Areal Flood Warning	LSX	Boone, Moniteau	24 hr
Apr 3, 1:09 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	36 min
Apr 3, 1:32 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis	43 min
Apr 3, 1:43 PM CDT	Flash Flood Warning	LSX	Crawford, Franklin, Gasconade, Jefferson, Washington	8 hr
Apr 3, 1:54 PM CDT	River Flood Warning	LSX	Marion	42 hr
Apr 3, 1:56 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau	49 min
Apr 3, 2:45 PM CDT	Flash Flood Warning	LSX	Boone, Callaway, Cole, Moniteau, Osage	8 hr
Apr 3, 3:36 PM CDT	River Flood Warning	LSX	Jefferson	4 days
Apr 3, 3:36 PM CDT	River Flood Warning	LSX	Franklin	71 hr
Apr 3, 5:37 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	38 min
Apr 3, 5:48 PM CDT	Tornado Warning	LSX	Cole, Osage	27 min
Apr 3, 6:06 PM CDT	Tornado Warning	LSX	Franklin, Gasconade, Osage	24 min
Apr 3, 6:34 PM CDT	Severe Thunderstorm Warning	LSX	Knox, Lewis	41 min
Apr 3, 6:36 PM CDT	Severe Thunderstorm Warning	LSX	Lewis, Marion, Monroe, Shelby	39 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2014 Every severe thunderstorm warning in 2014

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.