Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 117, NWS St. Louis, MO

April 22, 20115 counties in Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 22, 2011, 8:47 AM CDT for 5 counties in Missouri. It was in force for 43 min. 9 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 22, 2011, 8:47 AM CDT (13:47 UTC)
Expired: Apr 22, 2011, 9:30 AM CDT
In force: 43 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

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

The radar

The St Louis radar (KLSX), 147 km from the middle of the area, began a volume at 13:50 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 22, 9:00 AM CDT	HAIL 0.75	5 Se California, MO
Apr 22, 9:02 AM CDT	HAIL 1	Centertown, MO
Apr 22, 9:06 AM CDT	HAIL 0.5	Jamestown, MO
Apr 22, 9:09 AM CDT	HAIL 1.75	Centertown, MO	MEDIA RELAYED A REPORT FROM THE PUBLIC
Apr 22, 9:25 AM CDT	HAIL 0.7	Jefferson City, MO
Apr 22, 9:25 AM CDT	HAIL 1	Jefferson City, MO	EAST SIDE OF JEFFERSON CITY. LASTED 3 TO 4 MINUTES.
Apr 22, 9:25 AM CDT	HAIL 1	New Bloomfield, MO	HAIL LASTED 2 MINUTES...RANGED FROM NICKEL SIZE TO QUARTER SIZE
Apr 22, 9:28 AM CDT	HAIL 0.25	Jefferson City, MO
Apr 22, 9:29 AM CDT	HAIL 0.75	Jefferson City, MO	EAST SIDE OF JEFFERSON CITY. LASTED 3 TO 4 MINUTES.

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

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 1.8 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: 148 J/kg
Mixed-layer CIN: -391 J/kg
Mixed-layer LCL: 454 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 516 m²/s²
0-3 km storm-relative helicity: 554 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.

156 
WUUS53 KLSX 221347
SVRLSX
MOC019-027-051-135-151-221430-
/O.NEW.KLSX.SV.W.0117.110422T1347Z-110422T1430Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
847 AM CDT FRI APR 22 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN BOONE COUNTY IN CENTRAL MISSOURI...
  SOUTHERN CALLAWAY COUNTY IN CENTRAL MISSOURI...
  NORTHERN COLE COUNTY IN CENTRAL MISSOURI...
  NORTHEASTERN MONITEAU COUNTY IN CENTRAL MISSOURI...
  NORTHERN OSAGE COUNTY IN CENTRAL MISSOURI...

* UNTIL 930 AM CDT

* AT 846 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  CALIFORNIA...AND MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ASHLAND...JEFFERSON CITY...HOLTS SUMMIT...FULTON...MCGIRK...
  JAMESTOWN...CENTERTOWN...EASLEY...ST. MARTINS...LAKE MYKEE...NEW
  BLOOMFIELD...LUPUS...MCBAINE...SANDY HOOK...MARION...WILTON...
  ELSTON...HARTSBURG...GUTHRIE AND WAINWRIGHT.

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 3869 9264 3869 9263 3891 9250 3893 9179
      3848 9176 3858 9264
TIME...MOT...LOC 1347Z 269DEG 48KT 3870 9251
WIND...HAIL 60MPH 1.00IN

$$

GKS

1 follow-up statement

865 
WWUS53 KLSX 221403
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
903 AM CDT FRI APR 22 2011

MOC019-027-051-135-151-221430-
/O.CON.KLSX.SV.W.0117.000000T0000Z-110422T1430Z/
OSAGE MO-COLE MO-MONITEAU MO-CALLAWAY MO-BOONE MO-
903 AM CDT FRI APR 22 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHERN
BOONE...SOUTHERN CALLAWAY...NORTHEASTERN MONITEAU...NORTHERN COLE AND
NORTHERN OSAGE COUNTIES UNTIL 930 AM CDT...

AT 859 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES
SOUTH OF EASLEY...OR 6 MILES SOUTHWEST OF ASHLAND...MOVING EAST AT 45
MPH.

LOCATIONS IMPACTED INCLUDE...
  ASHLAND...JEFFERSON CITY...HOLTS SUMMIT...FULTON...LAKE MYKEE...NEW
  BLOOMFIELD...WAINWRIGHT...SCHUBERT...GUTHRIE...OSAGE CITY...
  CARRINGTON...LOOSE CREEK...BONNOTS MILL...TEBBETTS...
  FRANKENSTEIN...STEEDMAN...REFORM AND MOKANE.

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 3868 9253 3891 9247 3893 9179 3848 9176
      3857 9256
TIME...MOT...LOC 1404Z 261DEG 40KT 3873 9227
WIND...HAIL 60MPH 1.00IN

$$

GKS

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 9:24 PM CDT	River Flood Warning	LSX	Gasconade, Montgomery	11 days
Apr 21, 10:14 PM CDT	River Flood Warning	LSX	Reynolds	9 days
Apr 22, 7:12 AM CDT	Areal Flood Advisory	LSX	Sainte Genevieve, Saint Francois	3 hr
Apr 22, 7:17 AM CDT	Areal Flood Advisory	LSX	Jefferson	3 hr
Apr 22, 7:28 AM CDT	Flash Flood Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	6 hr
Apr 22, 9:16 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Pike	44 min
Apr 22, 9:28 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Lincoln, Montgomery, Pike, Warren	47 min
Apr 22, 9:32 AM CDT	Severe Thunderstorm Warning	LSX	Callaway, Cole, Franklin, Gasconade, Lincoln, Montgomery and 2 more	43 min
Apr 22, 9:36 AM CDT	Flash Flood Warning	LSX	Marion, Monroe, Ralls, Shelby	3 hr
Apr 22, 9:59 AM CDT	Severe Thunderstorm Warning	LSX	Lincoln	46 min
Apr 22, 10:17 AM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Jefferson, Lincoln, Montgomery, Saint Charles and 2 more	43 min
Apr 22, 10:56 AM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	49 min
Apr 22, 11:00 AM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Saint Charles, Saint Louis, Warren and 2 more	45 min
Apr 22, 11:44 AM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Louis, City of Saint Louis	46 min
Apr 22, 12:34 PM CDT	River Flood Warning	LSX	Saint Charles	26 hr
Apr 22, 2:39 PM CDT	River Flood Warning	LSX	Marion	37 hr
Apr 22, 4:32 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Moniteau	43 min
Apr 22, 4:40 PM CDT	Tornado Warning	LSX	Cole, Moniteau	50 min
Apr 22, 5:10 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade	39 min
Apr 22, 5:12 PM CDT	Tornado Warning	LSX	Boone, Callaway, Cole	48 min
Apr 22, 5:49 PM CDT	Tornado Warning	LSX	Callaway, Gasconade, Montgomery, Osage	41 min
Apr 22, 6:05 PM CDT	Severe Thunderstorm Warning	LSX	Cole, Osage	40 min
Apr 22, 6:22 PM CDT	Tornado Warning	LSX	Franklin, Gasconade, Lincoln, Montgomery, Warren	38 min
Apr 22, 6:36 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Gasconade, Osage	39 min
Apr 22, 6:55 PM CDT	Tornado Warning	LSX	Lincoln, Saint Charles, Saint Louis, Warren	50 min
Apr 22, 6:58 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	47 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.