Alert archive / Missouri / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 387, NWS St. Louis, MO

June 25, 2011Jefferson County, Sainte Genevieve County, Missouri; Monroe County, Randolph County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 25, 2011, 8:12 PM CDT for Jefferson County, Sainte Genevieve County, Missouri; Monroe County, Randolph County, Illinois. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 25, 2011, 8:12 PM CDT (01:12 UTC)
Expired: Jun 25, 2011, 9:00 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Monroe County, IL, Randolph County, IL, Jefferson County, MO, Sainte Genevieve County, MO

The radar

The St Louis radar (KLSX), 91 km from the middle of the area, began a volume at 01:12 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 25, 7:36 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.2 hours before the alert went out and 258 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: 1094 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

005 
WUUS53 KLSX 260112
SVRLSX
ILC133-157-MOC099-186-260200-
/O.NEW.KLSX.SV.W.0387.110626T0112Z-110626T0200Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
812 PM CDT SAT JUN 25 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL MONROE COUNTY IN SOUTHWEST ILLINOIS...
  NORTHWESTERN RANDOLPH COUNTY IN SOUTHWEST ILLINOIS...
  EXTREME SOUTHEASTERN JEFFERSON COUNTY IN EAST CENTRAL MISSOURI...
  NORTHERN STE. GENEVIEVE COUNTY IN SOUTHEAST MISSOURI...

* UNTIL 900 PM CDT

* AT 812 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
  LOCATED NEAR BLOOMSDALE...OR 12 MILES NORTHWEST OF STE.
  GENEVIEVE...AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  EVANSVILLE...BALDWIN...FULTS...KIDD...RENAULT...PRAIRIE DU
  ROCHER...KELLOGG...AMES...MODOC...RUMA...ROOTS...PRESTON...WALSH...
  PRAIRIE...ELLIS GROVE AND NEW PALESTINE.

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 3798 8979 3798 9033 3816 9035 3822 8986
      3822 8981
TIME...MOT...LOC 0113Z 266DEG 17KT 3808 9022
WIND...HAIL 60MPH 1.50IN

$$

CARNEY

2 follow-up statements

738 
WWUS53 KLSX 260133
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
833 PM CDT SAT JUN 25 2011

MOC099-186-260143-
/O.CAN.KLSX.SV.W.0387.000000T0000Z-110626T0200Z/
JEFFERSON MO-STE. GENEVIEVE MO-
833 PM CDT SAT JUN 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN STE. GENEVIEVE AND
EXTREME SOUTHEASTERN JEFFERSON COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM.

LAT...LON 3798 8979 3798 9002 3802 9006 3802 9010
      3804 9013 3806 9013 3807 9014 3807 9017
      3810 9023 3817 9029 3822 8986 3822 8981
TIME...MOT...LOC 0133Z 266DEG 15KT 3808 9015

$$

ILC133-157-260200-
/O.CON.KLSX.SV.W.0387.000000T0000Z-110626T0200Z/
MONROE IL-RANDOLPH IL-
833 PM CDT SAT JUN 25 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
RANDOLPH AND SOUTH CENTRAL MONROE COUNTIES UNTIL 900 PM CDT...

AT 830 PM 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 5 MILES
NORTHEAST OF BLOOMSDALE...OR 10 MILES NORTHWEST OF STE. GENEVIEVE...
MOVING EAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
  EVANSVILLE...BALDWIN...RENAULT...PRAIRIE DU ROCHER...KELLOGG...
  AMES...MODOC...RUMA...ROOTS...PRAIRIE...ELLIS GROVE...PRESTON...
  WALSH AND NEW PALESTINE.

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.

THIS IS A SUPERCELL THUNDERSTORM. DUE TO THE ROTATING NATURE OF
SUPERCELLS...THEY ARE CAPABLE OF PRODUCING ALL TYPES OF SEVERE
WEATHER...INCLUDING EXTREMELY LARGE HAIL...DESTRUCTIVE STRAIGHT LINE
WINDS AND POSSIBLY TORNADOES. BE PREPARED TO ACT QUICKLY SHOULD A
TORNADO OCCUR OR A TORNADO WARNING BE ISSUED.

&&

LAT...LON 3798 8979 3798 9002 3802 9006 3802 9010
      3804 9013 3806 9013 3807 9014 3807 9017
      3810 9023 3817 9029 3822 8986 3822 8981
TIME...MOT...LOC 0133Z 266DEG 15KT 3808 9015
WIND...HAIL 60MPH 1.00IN

$$

CARNEY

228 
WWUS53 KLSX 260156
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
856 PM CDT SAT JUN 25 2011

ILC133-157-260206-
/O.EXP.KLSX.SV.W.0387.000000T0000Z-110626T0200Z/
MONROE IL-RANDOLPH IL-
856 PM CDT SAT JUN 25 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN RANDOLPH AND
SOUTH CENTRAL MONROE COUNTIES WILL EXPIRE AT 900 PM CDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A SEVERE 
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM.

LAT...LON 3798 8979 3798 9002 3802 9006 3802 9010
      3804 9013 3806 9013 3807 9014 3807 9017
      3810 9023 3817 9029 3822 8986 3822 8981
TIME...MOT...LOC 0156Z 266DEG 15KT 3809 9003

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 7:26 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Jefferson, Washington	49 min
Jun 25, 7:36 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	39 min
Jun 25, 7:45 PM CDT	Tornado Warning	LSX	Franklin, Jefferson, Washington	45 min
Jun 25, 8:03 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Saint Francois, Washington	42 min
Jun 25, 8:09 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	51 min
Jun 25, 8:13 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles	47 min
Jun 25, 8:33 PM CDT	Flash Flood Warning	LSX	Lewis	6 hr
Jun 25, 8:42 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	48 min
Jun 25, 8:46 PM CDT	Severe Thunderstorm Warning	LSX	Saint Louis, City of Saint Louis	44 min
Jun 25, 8:52 PM CDT	Severe Thunderstorm Warning	LSX	Franklin, Jefferson, Washington	38 min
Jun 25, 9:27 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois	23 min
Jun 25, 10:01 PM CDT	Areal Flood Advisory	LSX	Franklin, Jefferson, Sainte Genevieve, Saint Francois, Washington	6 hr
Jun 25, 10:47 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Sainte Genevieve, Saint Francois, Washington	43 min
Jun 25, 11:00 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois, Washington	45 min
Jun 25, 11:08 PM CDT	Severe Thunderstorm Warning	LSX	Crawford, Franklin, Gasconade, Washington	22 min
Jun 25, 11:11 PM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis, City of Saint Louis	49 min
Jun 25, 11:35 PM CDT	Tornado Warning	LSX	Sainte Genevieve, Saint Francois	40 min
Jun 25, 11:42 PM CDT	Areal Flood Advisory	LSX	Saint Charles, Saint Louis, City of Saint Louis	6 hr
Jun 26, 12:06 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve, Saint Francois	39 min
Jun 26, 12:21 AM CDT	Flash Flood Warning	LSX	Franklin, Jefferson, Lincoln, Saint Charles, Saint Louis, Warren and 1 more	6 hr
Jun 26, 12:42 AM CDT	Severe Thunderstorm Warning	LSX	Sainte Genevieve	33 min
Jun 26, 12:43 AM CDT	Severe Thunderstorm Warning	LSX	Saint Charles, Saint Louis	47 min
Jun 26, 1:43 AM CDT	River Flood Warning	LSX	Saint Charles	13 hr
Jun 26, 2:11 AM CDT	Flash Flood Warning	LSX	Sainte Genevieve	4 hr
Jun 26, 6:29 AM CDT	Areal Flood Warning	LSX	Lincoln, Saint Charles, Saint Louis, City of Saint Louis	12 hr
Jun 26, 2:25 PM CDT	River Flood Warning	LSX	Lincoln	7 days
Jun 26, 2:25 PM CDT	River Flood Warning	LSX	Lewis	4 days
Jun 26, 2:43 PM CDT	Flash Flood Watch	LSX	Audrain, Boone, Callaway, Cole, Crawford, Franklin and 20 more	31 hr
Jun 26, 3:11 PM CDT	River Flood Warning	LSX	Ralls	6 days
Jun 26, 4:12 PM CDT	Flash Flood Warning	LSX	Jefferson, Saint Francois	6 hr
Jun 26, 4:15 PM CDT	Severe Thunderstorm Warning	LSX	Reynolds	30 min
Jun 26, 4:16 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	29 min
Jun 26, 4:40 PM CDT	Severe Thunderstorm Warning	LSX	Jefferson, Saint Francois, Washington	38 min
Jun 26, 4:54 PM CDT	Flash Flood Warning	LSX	Washington	6 hr
Jun 25, 7:13 PM CDT	Severe Thunderstorm Warning	LSX	Brown	20 min
Jun 25, 7:52 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin	38 min
Jun 25, 8:41 PM CDT	Severe Thunderstorm Warning	LSX	Madison	49 min
Jun 25, 8:53 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Montgomery	52 min
Jun 25, 8:58 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey	47 min
Jun 25, 9:36 PM CDT	Areal Flood Advisory	LSX	Bond, Fayette, Macoupin, Madison, Montgomery	6 hr
Jun 25, 9:42 PM CDT	Areal Flood Advisory	LSX	Clinton, Marion, Washington	6 hr
Jun 25, 10:01 PM CDT	River Flood Warning	LSX	Fayette	4 days
Jun 25, 10:11 PM CDT	River Flood Warning	LSX	Brown	7 days
Jun 25, 11:45 PM CDT	Areal Flood Advisory	LSX	Monroe, Randolph, Saint Clair	6 hr
Jun 26, 2:22 AM CDT	Areal Flood Warning	LSX	Brown	4 hr
Jun 26, 2:33 AM CDT	Severe Thunderstorm Warning	LSX	Randolph	42 min

Nearby

Severe Thunderstorm Warnings in Missouri, 2011 Severe Thunderstorm Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.