Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 435, NWS St. Louis, MO

July 3, 2011Callaway County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jul 3, 2011, 2:33 PM CDT for Callaway County, Missouri. It was in force for 42 min. 2 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: Jul 3, 2011, 2:33 PM CDT (19:33 UTC)
Expired: Jul 3, 2011, 3:15 PM CDT
In force: 42 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 70.0 mph

County Callaway County, MO

The radar

The St Louis radar (KLSX), 98 km from the middle of the area, began a volume at 19:35 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
Jul 3, 2:47 PM CDT	TSTM WND GST 50	Fulton, MO	40-50 MPH WIND GUSTS
Jul 3, 2:57 PM CDT	TSTM WND GST 70	Williamsburg, 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
Jul 3, 1:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 7.6 hours before the alert went out and 277 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: 1800 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 1453 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: -15 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.

097 
WUUS53 KLSX 031933
SVRLSX
MOC027-032015-
/O.NEW.KLSX.SV.W.0435.110703T1933Z-110703T2015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
233 PM CDT SUN JUL 3 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CENTRAL CALLAWAY COUNTY IN CENTRAL MISSOURI...

* UNTIL 315 PM CDT

* AT 231 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE
  HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS
  LOCATED NEAR FULTON...AND MOVING EAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WILLIAMSBURG AND REFORM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...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 3891 9196 3895 9164 3871 9164 3870 9165
      3878 9199
TIME...MOT...LOC 1933Z 274DEG 7KT 3884 9188
WIND...HAIL 70MPH 1.50IN

$$

CVKING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 1:18 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade	42 min
Jul 3, 1:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	46 min
Jul 3, 1:29 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	46 min
Jul 3, 1:41 PM CDT	Severe Thunderstorm Warning	LSX	Boone	49 min
Jul 3, 1:54 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	51 min
Jul 3, 2:02 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway	58 min
Jul 3, 2:12 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis	48 min
Jul 3, 2:13 PM CDT	Severe Thunderstorm Warning	LSX	Franklin	47 min
Jul 3, 2:16 PM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	44 min
Jul 3, 2:22 PM CDT	Severe Thunderstorm Warning	LSX	Saint Francois	20 min
Jul 3, 2:24 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	51 min
Jul 3, 2:29 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	46 min
Jul 3, 2:34 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis	26 min
Jul 3, 2:50 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Warren, City of Saint Louis	40 min
Jul 3, 2:51 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Osage	24 min
Jul 3, 2:55 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Montgomery, Warren	35 min
Jul 3, 3:05 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Montgomery, Osage	25 min
Jul 3, 3:24 PM CDT	Areal Flood Advisory	LSX	Sainte Genevieve, Saint Louis	6 hr
Jul 3, 3:26 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Franklin, Gasconade, Lincoln, Montgomery, Osage and 2 more	64 min
Jul 3, 3:56 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Saint Louis	49 min
Jul 3, 4:34 PM CDT	Areal Flood Advisory	LSX	Franklin, Lincoln, Saint Charles, Warren	5 hr
Jul 3, 5:25 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	35 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Every severe thunderstorm warning in 2011

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.