Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Lincoln, IL

April 19, 2011Christian County, Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 19, 2011, 5:40 PM CDT for Christian County, Sangamon County, Illinois. It was in force for 50 min. 7 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: Apr 19, 2011, 5:40 PM CDT (22:40 UTC)
Expired: Apr 19, 2011, 6:30 PM CDT
In force: 50 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Christian County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 51 km from the middle of the area, began a volume at 22:43 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
Apr 19, 5:50 PM CDT	HAIL 0.88	New Berlin, IL
Apr 19, 5:55 PM CDT	HAIL 1	2 S New Berlin, IL
Apr 19, 6:02 PM CDT	TSTM WND DMG	1 N Auburn, IL	FARM BUILDINGS DAMAGED
Apr 19, 6:05 PM CDT	TSTM WND DMG	Chatham, IL	ROOF DAMAGE IN CHATHAM
Apr 19, 6:06 PM CDT	TSTM WND DMG	3 S Springfield, IL	DELAYED REPORT. 8 POWER POLES SNAPPED IN HALF AND POWER LINES DOWN ON SOUTH 2ND STREET AT SOUTHWIND PARK ON THE SOUTH SIDE OF SPRINGFIELD. TIME ESTIMATED.
Apr 19, 6:11 PM CDT	TSTM WND DMG	Chatham, IL	WIND BLEW ROOF OFF A HOUSE
Apr 19, 6:30 PM CDT	TSTM WND DMG	1 E Pawnee, IL	TREES AND POWER POLES SNAPPED DOWN

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
Apr 19, 1:00 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.7 hours before the alert went out and 96 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: 453 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 345 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

486 
WUUS53 KILX 192240
SVRILX
ILC021-167-192330-
/O.NEW.KILX.SV.W.0039.110419T2240Z-110419T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LINCOLN IL
540 PM CDT TUE APR 19 2011

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHWESTERN CHRISTIAN COUNTY IN CENTRAL ILLINOIS...
  SANGAMON COUNTY IN CENTRAL ILLINOIS...

* UNTIL 630 PM CDT.

* AT 539 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM NEW BERLIN TO CHATHAM TO
  AUBURN...AND MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SPRINGFIELD...CHATHAM...DIVERNON...PAWNEE...ROCHESTER...RIVERTON...
  EDINBURG...MECHANICSBURG...MOUNT AUBURN...ILLIOPOLIS...GLENARM...
  CURRAN...FARMINGDALE...JEROME...LELAND GROVE...SOUTHERN VIEW...
  CAPITAL AIRPORT...SICILY...GRANDVIEW AND SANGCHRIS LAKE STATE PARK.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 78 AND 101.

THIS INCLUDES INTERSTATE 72 BETWEEN MILE MARKERS 80 AND 123.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 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.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 900 PM CDT TUESDAY EVENING
FOR SOUTHERN ILLINOIS.

LAT...LON 3990 8924 3974 8923 3953 8953 3954 8992
      3969 8998 3982 8999
TIME...MOT...LOC 2240Z 249DEG 49KT 3980 8988 3966 8971
          3956 8969
WIND...HAIL 60MPH 1.00IN

$$

CHURCHILL

2 follow-up statements

571 
WWUS53 KILX 192304
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
604 PM CDT TUE APR 19 2011

ILC021-167-192330-
/O.CON.KILX.SV.W.0039.000000T0000Z-110419T2330Z/
SANGAMON IL-CHRISTIAN IL-
604 PM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
CHRISTIAN AND SANGAMON COUNTIES UNTIL 630 PM CDT...

AT 602 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A LINE OF SEVERE 
THUNDERSTORMS PRODUCING QUARTER SIZE HAIL IN NEW BERLIN. OTHER 
SEVERE STORMS WERE ALONG A LINE FROM FROM 6 MILES NORTHWEST OF 
SPRINGFIELD TO CHATHAM TO DIVERNON...MOVING EAST AT 55 MPH. DAMAGING 
WINDS WILL ALSO BE POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
  SPRINGFIELD...PAWNEE...ROCHESTER...RIVERTON...EDINBURG...
  MECHANICSBURG...MOUNT AUBURN...ILLIOPOLIS...CAPITAL AIRPORT...
  GRANDVIEW...SICILY...CLEAR LAKE...TOVEY...BERRY...SANGCHRIS LAKE
  STATE PARK...SPAULDING...ROBY...DAWSON AND BUFFALO.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 78 AND 101.

THIS INCLUDES INTERSTATE 72 BETWEEN MILE MARKERS 80 AND 123.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH 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.

&&

LAT...LON 3990 8924 3974 8923 3953 8953 3954 8992
      3969 8998 3982 8999
TIME...MOT...LOC 2304Z 249DEG 49KT 3984 8971 3972 8961
          3957 8959
WIND...HAIL 60MPH 1.00IN

$$

CHURCHILL

199 
WWUS53 KILX 192331
SVSILX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
631 PM CDT TUE APR 19 2011

ILC021-167-192341-
/O.EXP.KILX.SV.W.0039.000000T0000Z-110419T2330Z/
SANGAMON IL-CHRISTIAN IL-
631 PM CDT TUE APR 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CHRISTIAN AND
SANGAMON COUNTIES HAS EXPIRED...

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

TORNADO WARNINGS CONTINUE FOR PORTIONS OF CHRISTIAN COUNTY.

LAT...LON 3990 8924 3974 8923 3953 8953 3954 8992
      3969 8998 3982 8999
TIME...MOT...LOC 2304Z 249DEG 49KT 3984 8971 3972 8961
          3957 8959

$$

CHURCHILL

The office that day

Everything else NWS Lincoln, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 19, 5:00 AM CDT	Special Weather Statement	ILX	Menard, Morgan, Sangamon, Scott	90 min
Apr 19, 5:11 AM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Scott	64 min
Apr 19, 5:20 AM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	55 min
Apr 19, 8:05 AM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Effingham, Moultrie, Shelby	40 min
Apr 19, 8:42 AM CDT	Severe Thunderstorm Warning	ILX	Clay, Effingham	27 min
Apr 19, 8:45 AM CDT	Severe Thunderstorm Warning	ILX	Effingham, Shelby	45 min
Apr 19, 9:08 AM CDT	Special Weather Statement	ILX	Jasper	52 min
Apr 19, 9:20 AM CDT	Severe Thunderstorm Warning	ILX	Coles, Cumberland, Effingham, Shelby	40 min
Apr 19, 9:28 AM CDT	Areal Flood Advisory	ILX	Coles, Cumberland, Effingham, Shelby	4 hr
Apr 19, 9:48 AM CDT	Special Weather Statement	ILX	Edgar	42 min
Apr 19, 9:53 AM CDT	Areal Flood Advisory	ILX	Clark, Coles, Edgar	3 hr
Apr 19, 12:55 PM CDT	River Flood Warning	ILX	Fulton, Mason	84 days
Apr 19, 12:55 PM CDT	River Flood Warning	ILX	Brown, Cass, Morgan, Schuyler	86 days
Apr 19, 4:37 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Fulton, Mason, Schuyler	38 min
Apr 19, 4:53 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	52 min
Apr 19, 5:46 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	33 min
Apr 19, 5:47 PM CDT	Special Weather Statement	ILX	Peoria	43 min
Apr 19, 5:54 PM CDT	Special Weather Statement	ILX	Knox, Stark	51 min
Apr 19, 6:01 PM CDT	Severe Thunderstorm Warning	ILX	Logan, Menard, Sangamon	34 min
Apr 19, 6:12 PM CDT	Tornado Warning	ILX	Christian, Sangamon	36 min
Apr 19, 6:14 PM CDT	Severe Thunderstorm Warning	ILX	Marshall, Peoria	31 min
Apr 19, 6:22 PM CDT	Tornado Warning	ILX	Christian	25 min
Apr 19, 6:29 PM CDT	Tornado Warning	ILX	Christian, Shelby	46 min
Apr 19, 6:41 PM CDT	Severe Thunderstorm Warning	ILX	Macon	32 min
Apr 19, 6:45 PM CDT	Tornado Warning	ILX	Christian	21 min
Apr 19, 6:52 PM CDT	Tornado Warning	ILX	Shelby	38 min
Apr 19, 6:54 PM CDT	Tornado Warning	ILX	Macon, Piatt	36 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.