Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 244, NWS St. Louis, MO

June 5, 2011Calhoun County, Greene County, Pike County, Illinois; Pike County, Ralls County, Missouri

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 5, 2011, 4:59 AM CDT for Calhoun County, Greene County, Pike County, Illinois; Pike County, Ralls County, Missouri. It was in force for 46 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 5, 2011, 4:59 AM CDT (09:59 UTC)
Expired: Jun 5, 2011, 5:45 AM CDT
In force: 46 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 0.75 in
Wind: 70.0 mph

Counties Calhoun County, IL, Greene County, IL, Pike County, IL, Pike County, MO, Ralls County, MO

The radar

The St Louis radar (KLSX), 100 km from the middle of the area, began a volume at 10:02 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 10.0 hours before the alert went out and 194 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: 2793 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1719 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 49 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.

536 
WUUS53 KLSX 050959
SVRLSX
ILC013-061-149-MOC163-173-051045-
/O.NEW.KLSX.SV.W.0244.110605T0959Z-110605T1045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
459 AM CDT SUN JUN 5 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN SOUTHWEST ILLINOIS...
  GREENE COUNTY IN SOUTHWEST ILLINOIS...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...
  EASTERN PIKE COUNTY IN NORTHEAST MISSOURI...
  NORTHEASTERN RALLS COUNTY IN NORTHEAST MISSOURI...

* UNTIL 545 AM CDT

* AT 455 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
  IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM GRIGGSVILLE TO 8 MILES SOUTHEAST OF HANNIBAL...AND
  MOVING SOUTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PITTSFIELD...LOUISIANA...WHITE HALL...GRIGGSVILLE...ATLAS...PIKE...
  PLEASANT HILL...CLARKSVILLE...ROODHOUSE...BELLEVIEW...CARROLLTON...
  GREENFIELD...VALLEY CITY...EL DARA...ASHBURN...NEW HARTFORD...
  DETROIT...ROCKPORT...SUMMER HILL AND TIME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THESE STORMS HAVE EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

THESE STORMS HAVE A HISTORY OF PRODUCING WIND DAMAGE ACROSS ADAMS 
COUNTY ILLINOIS. THIS IS AN EXTREMELY DANGEROUS SITUATION. SEEK 
SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES LEADING KILLERS. REMEMBER...
IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING.

&&

LAT...LON 3984 9064 3979 9059 3969 9064 3953 9058
      3953 9034 3931 9015 3926 9015 3922 9058
      3922 9097 3968 9141 3968 9131 3969 9132
      3976 9103 3976 9092 3979 9092
TIME...MOT...LOC 0959Z 323DEG 42KT 3974 9068 3962 9122
WIND...HAIL 70MPH <.75IN

$$

CARNEY

1 follow-up statement

964 
WWUS53 KLSX 051026
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
526 AM CDT SUN JUN 5 2011

MOC173-051035-
/O.CAN.KLSX.SV.W.0244.000000T0000Z-110605T1045Z/
RALLS MO-
526 AM CDT SUN JUN 5 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN RALLS COUNTY IS
CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE 
WARNED AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

LAT...LON 3979 9059 3969 9064 3953 9058 3952 9034
      3931 9015 3926 9015 3922 9058 3922 9097
      3960 9120 3960 9118 3963 9122 3976 9103
      3976 9092 3979 9091 3984 9064
TIME...MOT...LOC 1025Z 323DEG 42KT 3963 9054 3938 9098

$$

ILC013-061-149-MOC163-051045-
/O.CON.KLSX.SV.W.0244.000000T0000Z-110605T1045Z/
PIKE IL-CALHOUN IL-GREENE IL-PIKE MO-
526 AM CDT SUN JUN 5 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GREENE AND
CALHOUN COUNTIES IN SOUTHWEST ILLINOIS...AND PIKE COUNTY IN WEST
CENTRAL ILLINOIS...AND EASTERN PIKE COUNTY IN NORTHEAST MISSOURI
UNTIL 545 AM CDT...

AT 523 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS
IN EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 5 MILES WEST OF WINCHESTER TO LOUISIANA...MOVING
SOUTHEAST AT 50 MPH.

THERE HAVE BEEN NUMEROUS REPORTS OF TREES AND POWER LINES DOWN IN 
ADAMS COUNTY WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  WHITE HALL...CLARKSVILLE...BELLEVIEW...ROODHOUSE...CARROLLTON...
  GREENFIELD...NEBO...BEDFORD...PEARL...PAYNESVILLE...BEECREEK...
  PATTERSON...HILLVIEW...ANNADA...BARROW...MOZIER...WALKERSVILLE...
  HAYPRESS...KAMPSVILLE AND HAMBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS EXHIBITED SOME WEAK ROTATION. TORNADOES CAN DEVELOP
QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH ONE IS NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE... SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

PREPARE IMMEDIATELY FOR LARGE HAIL AND DAMAGING WINDS IF YOU ARE IN
THE PATH OF THIS STORM. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ST LOUIS.

&&

LAT...LON 3979 9059 3969 9064 3953 9058 3952 9034
      3931 9015 3926 9015 3922 9058 3922 9097
      3960 9120 3960 9118 3963 9122 3976 9103
      3976 9092 3979 9091 3984 9064
TIME...MOT...LOC 1025Z 323DEG 42KT 3963 9054 3938 9098
WIND...HAIL 70MPH <.75IN

$$

GLASS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 5, 3:56 AM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	49 min
Jun 5, 4:29 AM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	46 min
Jun 5, 5:46 AM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin	44 min
Jun 5, 6:33 AM CDT	Severe Thunderstorm Warning	LSX	Fayette, Macoupin, Montgomery	57 min
Jun 5, 7:27 AM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Marion, Montgomery	48 min
Jun 5, 7:36 AM CDT	Severe Thunderstorm Warning	LSX	Brown	23 min
Jun 5, 3:23 AM CDT	Severe Thunderstorm Warning	LSX	Monroe, Ralls	40 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.