Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 270, NWS St. Louis, MO

June 10, 2011Adams County, Brown County, Pike County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 10, 2011, 6:27 PM CDT for Adams County, Brown County, Pike County, Illinois. It was in force for 48 min. 3 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: Jun 10, 2011, 6:27 PM CDT (23:27 UTC)
Expired: Jun 10, 2011, 7:15 PM CDT
In force: 48 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.75 in
Wind: 60.0 mph

Counties Adams County, IL, Brown County, IL, Pike County, IL

The radar

The Lincoln radar (KILX), 118 km from the middle of the area, began a volume at 23:27 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
Jun 10, 6:34 PM CDT	HAIL 1.75	Barry, IL
Jun 10, 6:44 PM CDT	HAIL 2	Beverly, IL	1.5 TO 2 INCH DIAMETER HAIL
Jun 10, 6:59 PM CDT	HAIL 1.75	Beverly, IL

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
Jun 10, 4:57 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.5 hours before the alert went out and 180 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: 581 J/kg
Mixed-layer CIN: -228 J/kg
Mixed-layer LCL: 670 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

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

865 
WUUS53 KLSX 102327
SVRLSX
ILC001-009-149-110015-
/O.NEW.KLSX.SV.W.0270.110610T2327Z-110611T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
627 PM CDT FRI JUN 10 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  BROWN COUNTY IN WEST CENTRAL ILLINOIS...
  PIKE COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 715 PM CDT

* AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED 7 MILES
  SOUTH OF BARRY...OR 10 MILES NORTH OF LOUISIANA...AND MOVING
  NORTHEAST AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PITTSFIELD...BARRY...BEVERLY...GRIGGSVILLE...BUCKHORN...MOUNT
  STERLING...CLAYTON...EL DARA...TIME...MILTON...DETROIT...BAYLIS...
  NEW SALEM...FLORENCE...KINGSTON...VALLEY CITY...FISHHOOK...PERRY...
  CHAMBERSBURG AND KELLERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. THIS STORM HAS A HISTORY OF PRODUCING 
LARGE HAIL. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR LARGE 
DESTRUCTIVE HAIL. 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 4011 9070 4009 9070 4008 9067 4005 9067
      4002 9060 3999 9060 3999 9056 3997 9054
      3990 9055 3987 9058 3983 9056 3972 9064
      3956 9057 3941 9092 3961 9120 4011 9093
TIME...MOT...LOC 2327Z 207DEG 25KT 3963 9104
WIND...HAIL 60MPH 1.75IN

$$

TES

1 follow-up statement

590 
WWUS53 KLSX 102343
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
643 PM CDT FRI JUN 10 2011

ILC001-009-149-110015-
/O.CON.KLSX.SV.W.0270.000000T0000Z-110611T0015Z/
PIKE IL-ADAMS IL-BROWN IL-
643 PM CDT FRI JUN 10 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR BROWN...
SOUTHEASTERN ADAMS AND NORTHERN PIKE COUNTIES IN WEST CENTRAL
ILLINOIS UNTIL 715 PM CDT...

AT 640 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
BEVERLY...OR 13 MILES NORTHWEST OF PITTSFIELD...MOVING NORTHEAST AT
35 MPH.

LOCATIONS IMPACTED INCLUDE...
  BEVERLY...GRIGGSVILLE...BUCKHORN...CLAYTON...MOUNT STERLING...
  KINGSTON...VALLEY CITY...FISHHOOK...PERRY...CHAMBERSBURG...
  KELLERVILLE...VERSAILLES...MOUND STATION...RIPLEY AND COOPERTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM WITH A HISTORY OF PRODUCING LARGE HAIL. IF 
YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR LARGE DESTRUCTIVE 
HAIL. 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 4011 9070 4009 9070 4008 9067 4005 9067
      4002 9060 3999 9060 3999 9056 3997 9054
      3990 9055 3987 9058 3983 9056 3972 9064
      3956 9057 3956 9085 3971 9115 4011 9093
TIME...MOT...LOC 2343Z 207DEG 28KT 3976 9097
WIND...HAIL 60MPH 1.75IN

$$

TES

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 12:05 AM CDT	Flash Flood Warning	LSX	Adams	6 hr
Jun 10, 11:38 AM CDT	River Flood Warning	LSX	Adams	13 days
Jun 10, 11:38 AM CDT	River Flood Warning	LSX	Adams	14 days
Jun 10, 11:38 AM CDT	River Flood Warning	LSX	Pike	14 days
Jun 10, 3:38 PM CDT	Areal Flood Advisory	LSX	Marion	4 hr
Jun 10, 5:10 PM CDT	Severe Thunderstorm Warning	LSX	Fayette, Marion	65 min
Jun 10, 5:30 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Pike	45 min
Jun 10, 5:42 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	48 min
Jun 10, 5:49 PM CDT	Tornado Warning	LSX	Adams	41 min
Jun 10, 6:16 PM CDT	Flash Flood Warning	LSX	Marion	10 hr
Jun 10, 6:30 PM CDT	Tornado Warning	LSX	Adams	30 min
Jun 10, 6:43 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Clinton, Fayette, Marion	62 min

Nearby

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.