Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 199, NWS St. Louis, MO

May 23, 2011Bond County, Fayette County, Montgomery County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at May 23, 2011, 1:26 PM CDT for Bond County, Fayette County, Montgomery County, Illinois. It was in force for 49 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 23, 2011, 1:26 PM CDT (18:26 UTC)
Expired: May 23, 2011, 2:15 PM CDT
In force: 49 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 0.88 in
Wind: 60.0 mph

Counties Bond County, IL, Fayette County, IL, Montgomery County, IL

The radar

The Lincoln radar (KILX), 127 km from the middle of the area, began a volume at 18:30 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 23, 1:26 PM CDT	TSTM WND DMG	Greenville, IL	30-INCH TREE SNAPPED 6 FEET OFF THE GROUND.

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
May 23, 10:55 AM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 6.4 hours before the alert went out and 138 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: 504 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 1171 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 139 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.7

Open this sounding in Storm Lab

The text

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

207 
WUUS53 KLSX 231826
SVRLSX
ILC005-051-135-231915-
/O.NEW.KLSX.SV.W.0199.110523T1826Z-110523T1915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
126 PM CDT MON MAY 23 2011

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN BOND COUNTY IN SOUTH CENTRAL ILLINOIS...
  FAYETTE COUNTY IN SOUTH CENTRAL ILLINOIS...
  SOUTHERN MONTGOMERY COUNTY IN SOUTH CENTRAL ILLINOIS...

* UNTIL 215 PM CDT

* AT 122 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM LITCHFIELD TO TAYLOR SPRINGS TO GREENVILLE TO BEAVER CREEK...
  AND MOVING EAST AT 60 MPH. NICKEL SIZE HAIL MAY ALSO ACCOMPANY
  THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  VANDALIA...NOKOMIS...MULBERRY GROVE...TAMALCO...VAN BURENSBURG...
  WITT...SHOBONIER...RAMSEY...BROWNSTOWN...ST. ELMO...WRIGHTS
  CORNER...PLEASANT MOUND...CHAPMAN...IRVING...FILLMORE...
  PITTSBURG...HAGERSTOWN...SHAFTER...BINGHAM AND BAYLE CITY.

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.

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 3882 8907 3883 8913 3880 8914 3874 8934
      3874 8944 3888 8944 3906 8952 3924 8970
      3927 8970 3936 8939 3935 8914 3922 8913
      3921 8880 3892 8880 3891 8878
TIME...MOT...LOC 1827Z 251DEG 53KT 3923 8953 3910 8938
          3892 8930 3877 8935
WIND...HAIL 60MPH 0.88IN

$$

BROWNING

1 follow-up statement

732 
WWUS53 KLSX 231917
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
217 PM CDT MON MAY 23 2011

ILC005-051-135-231927-
/O.EXP.KLSX.SV.W.0199.000000T0000Z-110523T1915Z/
MONTGOMERY IL-FAYETTE IL-BOND IL-
217 PM CDT MON MAY 23 2011

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN BOND...FAYETTE AND
SOUTHERN MONTGOMERY COUNTIES HAS EXPIRED...

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 3882 8907 3883 8913 3880 8914 3874 8934
      3874 8944 3888 8944 3906 8952 3924 8970
      3927 8970 3936 8939 3935 8914 3922 8913
      3921 8880 3892 8880 3891 8878
TIME...MOT...LOC 1826Z 251DEG 53KT 3922 8955 3909 8939
          3891 8931 3876 8936

$$

BROWNING

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:45 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun	45 min
May 22, 7:51 PM CDT	Tornado Warning	LSX	Calhoun, Jersey	39 min
May 22, 8:08 PM CDT	Severe Thunderstorm Warning	LSX	Greene, Jersey, Macoupin	41 min
May 22, 8:15 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	45 min
May 23, 12:04 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Greene, Jersey, Macoupin, Madison, Saint Clair	41 min
May 23, 12:42 PM CDT	Severe Thunderstorm Warning	LSX	Bond, Fayette, Jersey, Macoupin, Madison, Montgomery and 1 more	48 min
May 23, 12:53 PM CDT	Areal Flood Advisory	LSX	Madison, Monroe, Saint Clair	3 hr
May 23, 1:14 PM CDT	Areal Flood Advisory	LSX	Bond, Clinton	4 hr
May 23, 1:32 PM CDT	Areal Flood Advisory	LSX	Fayette, Marion, Washington	4 hr
May 23, 2:15 PM CDT	Severe Thunderstorm Warning	LSX	Marion	16 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.