Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 69, NWS St. Louis, MO

April 19, 20115 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 19, 2011, 3:19 AM CDT for 5 counties in Missouri. It was in force for 41 min. 7 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: Apr 19, 2011, 3:19 AM CDT (08:19 UTC)
Expired: Apr 19, 2011, 4:00 AM CDT
In force: 41 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Boone County, MO, Callaway County, MO, Cole County, MO, Moniteau County, MO, Osage County, MO

The radar

The St Louis radar (KLSX), 128 km from the middle of the area, began a volume at 08:22 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 19, 3:21 AM CDT	HAIL 1.75	Jefferson City, MO
Apr 19, 3:34 AM CDT	HAIL 2	Jefferson City, MO	WEST SIDE OF JEFFERSON CITY. DECK IS COVERED.
Apr 19, 3:48 AM CDT	HAIL 1	New Bloomfield, MO
Apr 19, 3:50 AM CDT	HAIL 1.25	Jefferson City, MO	AT 507 CREST DR. 315 AM HAIL BEGAN... LASTED 10 MIN THEN ENDED. BEGAN AGAIN 10 MIN LATER...MAX HAIL WAS 1.25 INCHES
Apr 19, 3:50 AM CDT	HAIL 1.75	4 Nw Jefferson City, MO
Apr 19, 4:03 AM CDT	HAIL 0.5	Fulton, MO	HAIL OCCURED AT BOTH HOLT SUMMIT AND NEW BLOOMFIELD.
Apr 19, 4:05 AM CDT	HAIL 1	2 Ssw Holts Summit, 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
Apr 19, 3:11 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.3 hours before the alert went out and 237 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: 554 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 1071 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 259 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

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

786 
WUUS53 KLSX 190819
SVRLSX
MOC019-027-051-135-151-190900-
/O.NEW.KLSX.SV.W.0069.110419T0819Z-110419T0900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
319 AM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BOONE COUNTY IN CENTRAL MISSOURI...
  CALLAWAY COUNTY IN CENTRAL MISSOURI...
  COLE COUNTY IN CENTRAL MISSOURI...
  SOUTHEASTERN MONITEAU COUNTY IN CENTRAL MISSOURI...
  NORTHWESTERN OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 400 AM CDT

* AT 315 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR ST. MARTINS...OR 5 MILES WEST OF 
  JEFFERSON CITY...AND MOVING NORTHEAST AT 45 MPH.  A SECOND SEVERE 
  STORM WAS LOCATED NEAR EUGENE...AND IT WAS ALSO MOVING NORTHEAST
  AT 45 MPH. 

* LOCATIONS IMPACTED INCLUDE...
  JEFFERSON CITY...HOLTS SUMMIT...ASHLAND...FULTON...TAOS...LAKE
  MYKEE...NEW BLOOMFIELD...MARION...SCHUBERT...HARTSBURG...OSAGE
  CITY...WAINWRIGHT...BONNOTS MILL...TEBBETTS...GUTHRIE...MOKANE...
  CARRINGTON...STEEDMAN...REFORM AND KINGDOM CITY.

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 3907 9209 3885 9164 3882 9165 3829 9219
      3833 9220 3832 9226 3834 9242 3842 9241
      3843 9260
TIME...MOT...LOC 0818Z 220DEG 44KT 3858 9225
WIND...HAIL <50MPH 1.00IN

$$

TRUETT

2 follow-up statements

562 
WWUS53 KLSX 190833
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
333 AM CDT TUE APR 19 2011

MOC019-027-051-135-151-190900-
/O.CON.KLSX.SV.W.0069.000000T0000Z-110419T0900Z/
OSAGE MO-COLE MO-MONITEAU MO-CALLAWAY MO-BOONE MO-
333 AM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BOONE...CALLAWAY...SOUTHEASTERN MONITEAU...COLE AND NORTHWESTERN
OSAGE COUNTIES UNTIL 400 AM CDT...

AT 329 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL.  THIS 
STORM WAS LOCATED NEAR JEFFERSON CITY...MOVING NORTHEAST AT 40 MPH.  
THERE HAVE BEEN NUMEROUS REPORTS OF QUARTER TO GOLF BALL SIZED HAIL 
IN AND NEAR JEFFERSON CITY WITH THIS STORM.  

A SECOND SEVERE THUNDERSTORM WAS OVER SOUTHERN COLE COUNTY...NEAR 
RUSSELLVILLE.  THIS STORM WAS ALSO MOVING NORTHEAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  HOLTS SUMMIT...ASHLAND...FULTON...LAKE MYKEE...NEW BLOOMFIELD...
  WAINWRIGHT...BONNOTS MILL...TEBBETTS...GUTHRIE...CARRINGTON...
  MOKANE...STEEDMAN...REFORM...KINGDOM CITY AND HATTON.

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 3907 9209 3885 9164 3882 9165 3829 9219
      3833 9220 3832 9226 3834 9242 3842 9241
      3843 9260
TIME...MOT...LOC 0831Z 227DEG 35KT 3865 9216
WIND...HAIL <50MPH 1.75IN

$$

TRUETT

048 
WWUS53 KLSX 190847
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
347 AM CDT TUE APR 19 2011

MOC019-027-051-135-151-190900-
/O.CON.KLSX.SV.W.0069.000000T0000Z-110419T0900Z/
OSAGE MO-COLE MO-MONITEAU MO-CALLAWAY MO-BOONE MO-
347 AM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
BOONE...CALLAWAY...SOUTHEASTERN MONITEAU...COLE AND NORTHWESTERN
OSAGE COUNTIES UNTIL 400 AM CDT...

...ANOTHER ROUND OF DAMAGING HAIL HEADING FOR JEFFERSON CITY...

AT 342 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
CAPABLE OF PRODUCING GOLF BALL SIZED OR LARGER HAIL 5 MILES 
SOUTHWEST OF JEFFERSON CITY.  IT IS MOVING NORTHEAST...AND WILL 
BRING ANOTHER ROUND OF LARGE HAIL TO THE JEFFERSON CITY AREA BY 4 AM.

ANOTHER STORM WITH GOLF BALL SIZE HAIL WAS LOCATED NEAR NEW 
BLOOMFIELD...OR 6 MILES NORTHEAST OF HOLTS SUMMIT...MOVING NORTHEAST 
AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
  JEFFERSON CITY...FULTON...CARRINGTON...MOKANE...
  STEEDMAN...REFORM...KINGDOM CITY AND HATTON.

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 3907 9209 3885 9164 3882 9165 3829 9219
      3833 9220 3832 9226 3834 9242 3842 9241
      3843 9260
TIME...MOT...LOC 0845Z 229DEG 35KT 3874 9202
WIND...HAIL <50MPH 1.75IN

$$

TRUETT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 19, 2:51 AM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau, Osage	39 min
Apr 19, 3:26 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Gasconade, Osage	49 min
Apr 19, 3:39 AM CDT	Severe Thunderstorm Warning	LSX	Moniteau	21 min
Apr 19, 3:57 AM CDT	Severe Thunderstorm Warning	LSX	Audrain, Boone, Callaway, Cole, Franklin, Gasconade and 4 more	48 min
Apr 19, 4:35 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	40 min
Apr 19, 4:43 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Warren	47 min
Apr 19, 4:58 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Washington	32 min
Apr 19, 5:23 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Saint Charles, Warren, Washington	37 min
Apr 19, 5:43 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Charles, Saint Louis, Washington	47 min
Apr 19, 6:21 AM CDT	Areal Flood Advisory	LSX	Jefferson, Saint Charles, Saint Louis, City of Saint Louis	3 hr
Apr 19, 6:22 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson	38 min
Apr 19, 6:26 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	49 min
Apr 19, 7:08 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	37 min
Apr 19, 8:05 AM CDT	River Flood Warning	LSX	Saint Charles	30 hr
Apr 19, 11:06 AM CDT	River Flood Warning	LSX	Lincoln	19 days
Apr 19, 11:33 AM CDT	River Flood Warning	LSX	Jefferson, Saint Louis	30 days
Apr 19, 3:46 PM CDT	Severe Thunderstorm Warning	LSX	Pike, Ralls	44 min
Apr 19, 3:48 PM CDT	Severe Thunderstorm Warning	LSX	Audrain, Montgomery, Pike	42 min
Apr 19, 3:54 PM CDT	Severe Thunderstorm Warning	LSX	Boone, Callaway, Cole, Osage	51 min
Apr 19, 3:59 PM CDT	Tornado Warning	LSX	Pike	46 min
Apr 19, 4:24 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Franklin, Gasconade, Osage	51 min
Apr 19, 4:31 PM CDT	Severe Thunderstorm Warning	LSX	Callaway, Montgomery, Warren	44 min
Apr 19, 4:31 PM CDT	Tornado Warning	LSX	Pike	44 min
Apr 19, 4:41 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	49 min
Apr 19, 5:01 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Montgomery, Saint Charles, Warren	44 min
Apr 19, 5:13 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Montgomery, Saint Charles, Warren	47 min
Apr 19, 5:28 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	47 min
Apr 19, 5:44 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	34 min
Apr 19, 5:56 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Warren	34 min
Apr 19, 5:58 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	32 min
Apr 19, 6:12 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles, Saint Louis, Warren	48 min
Apr 19, 6:14 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Warren	31 min
Apr 19, 6:15 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	60 min
Apr 19, 6:30 PM CDT	Flash Flood Warning	LSX	Saint Charles	3 hr
Apr 19, 6:37 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Madison, Reynolds, Saint Francois, Washington	53 min
Apr 19, 6:45 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Saint Charles	30 min
Apr 19, 6:51 PM CDT	Severe Thunderstorm Warning	LSX	Iron, Reynolds	39 min
Apr 19, 6:56 PM CDT	Areal Flood Advisory	LSX	Franklin, Warren	5 hr
Apr 19, 6:56 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	64 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.