Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 150, NWS St. Louis, MO

May 11, 2011Calhoun County, Jersey County, Illinois; Lincoln County, Saint Charles County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at May 11, 2011, 2:07 PM CDT for Calhoun County, Jersey County, Illinois; Lincoln County, Saint Charles County, Missouri. It was in force for 38 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: May 11, 2011, 2:07 PM CDT (19:07 UTC)
Expired: May 11, 2011, 2:45 PM CDT
In force: 38 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties Calhoun County, IL, Jersey County, IL, Lincoln County, MO, Saint Charles County, MO

The radar

The St Louis radar (KLSX), 43 km from the middle of the area, began a volume at 19:07 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
May 11, 2:52 PM CDT	HAIL 1	Golden Eagle, IL	STILL HAILING.

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

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 7.1 hours before the alert went out and 208 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: 2360 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 875 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: -68 m²/s²
0-3 km storm-relative helicity: -51 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.

227 
WUUS53 KLSX 111907
SVRLSX
ILC013-083-MOC113-183-111945-
/O.NEW.KLSX.SV.W.0150.110511T1907Z-110511T1945Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
207 PM CDT WED MAY 11 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
  WESTERN JERSEY COUNTY IN SOUTHWEST ILLINOIS...
  SOUTHEASTERN LINCOLN COUNTY IN EAST CENTRAL MISSOURI...
  NORTH CENTRAL ST. CHARLES COUNTY IN EAST CENTRAL MISSOURI...

* UNTIL 245 PM CDT

* AT 203 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS STORM WAS LOCATED NEAR
  ST. PAUL...AND MOVING NORTHEAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WINFIELD...GRAFTON...OLD MONROE...GOLDEN EAGLE...FOLEY...
  BEECHVILLE...BRUSSELS...MEPPEN...DEER PLAIN...BATCHTOWN...NUTWOOD
  AND FIELDON.

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 3898 9035 3879 9079 3892 9091 3915 9062
      3914 9061 3912 9060 3914 9060 3914 9058
      3918 9058 3918 9057 3919 9055
TIME...MOT...LOC 1907Z 229DEG 15KT 3887 9075
WIND...HAIL 70MPH 1.00IN

$$

GLASS

1 follow-up statement

988 
WWUS53 KLSX 111930
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
230 PM CDT WED MAY 11 2011

ILC013-083-MOC113-183-111945-
/O.CON.KLSX.SV.W.0150.000000T0000Z-110511T1945Z/
JERSEY IL-CALHOUN IL-LINCOLN MO-ST. CHARLES MO-
230 PM CDT WED MAY 11 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
ST. CHARLES...EAST CENTRAL LINCOLN...CALHOUN AND WESTERN JERSEY
COUNTIES UNTIL 245 PM CDT...

AT 228 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 6
MILES SOUTHEAST OF WINFIELD...OR 7 MILES NORTHEAST OF ST. PAUL...
MOVING NORTHEAST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...
  GRAFTON...GOLDEN EAGLE...FOLEY...BEECHVILLE...BRUSSELS...MEPPEN...
  DEER PLAIN...BATCHTOWN...NUTWOOD AND FIELDON.

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 3919 9055 3898 9035 3884 9068 3902 9077
      3915 9062 3914 9061 3912 9060 3913 9059
      3914 9060 3914 9058 3918 9058 3918 9057
TIME...MOT...LOC 1931Z 229DEG 15KT 3894 9065
WIND...HAIL 60MPH 1.50IN

$$

GLASS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 11, 1:57 PM CDT	Severe Thunderstorm Warning	LSX	Adams	48 min
May 11, 2:06 PM CDT	Severe Thunderstorm Warning	LSX	Pike	24 min
May 11, 2:28 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	47 min
May 11, 2:31 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	44 min
May 11, 2:42 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey	48 min
May 11, 2:51 PM CDT	Severe Thunderstorm Warning	LSX	Pike	39 min
May 11, 3:15 PM CDT	Severe Thunderstorm Warning	LSX	Brown, Pike	45 min
May 11, 3:30 PM CDT	Severe Thunderstorm Warning	LSX	Pike	15 min
May 11, 4:15 PM CDT	Areal Flood Advisory	LSX	Adams, Pike	4 hr
May 11, 11:37 AM CDT	Severe Thunderstorm Warning	LSX	Knox, Shelby	38 min
May 11, 12:15 PM CDT	Severe Thunderstorm Warning	LSX	Knox	12 min
May 11, 2:05 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln	25 min
May 11, 2:24 PM CDT	Severe Thunderstorm Warning	LSX	Lincoln, Saint Charles, Warren	29 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2011 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.