Alert archive / Illinois / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 41, NWS Lincoln, IL

April 19, 2011Logan County, Menard County, Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Apr 19, 2011, 6:01 PM CDT for Logan County, Menard County, Sangamon County, Illinois. It was in force for 34 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: Apr 19, 2011, 6:01 PM CDT (23:01 UTC)
Expired: Apr 19, 2011, 6:35 PM CDT
In force: 34 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Logan County, IL, Menard County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 12 km from the middle of the area, began a volume at 23:02 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.

What was reported inside it

Time	Report	Where	Remark
Apr 19, 6:10 PM CDT	HAIL 1	Williamsville, 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
Apr 19, 1:00 PM CDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.0 hours before the alert went out and 72 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.

701 
WUUS53 KILX 192301
SVRILX
ILC107-129-167-200000-
/O.NEW.KILX.SV.W.0041.110419T2301Z-110420T0000Z/

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

THE NATIONAL WEATHER SERVICE IN LINCOLN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN LOGAN COUNTY IN CENTRAL ILLINOIS...
  EAST CENTRAL MENARD COUNTY IN CENTRAL ILLINOIS...
  NORTH CENTRAL SANGAMON COUNTY IN CENTRAL ILLINOIS...

* UNTIL 700 PM CDT.

* AT 557 PM CDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE
  THUNDERSTORM PRODUCING PING PONG BALL SIZE HAIL...AND DAMAGING
  WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  SHERMAN...OR 10 MILES NORTH OF SPRINGFIELD...AND MOVING
  NORTHEAST AT 50 MPH.

* LOCATIONS IMPACTED INCLUDE...
  LINCOLN...ELKHART...CHESTNUT AND BROADWELL.

THIS INCLUDES INTERSTATE 55 BETWEEN MILE MARKERS 104 AND 133.

THIS INCLUDES INTERSTATE 155 BETWEEN MILE MARKERS 0 AND 1.

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.

&&

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

LAT...LON 4019 8948 4020 8926 4008 8915 3986 8956
      3995 8970
TIME...MOT...LOC 2300Z 222DEG 44KT 3995 8956
WIND...HAIL 60MPH 1.00IN

$$

CHURCHILL

2 follow-up statements

032 
WWUS53 KILX 192317
SVSILX

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

ILC107-129-167-200000-
/O.CON.KILX.SV.W.0041.000000T0000Z-110420T0000Z/
LOGAN IL-MENARD IL-SANGAMON IL-
617 PM CDT TUE APR 19 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL
SANGAMON...EAST CENTRAL MENARD AND SOUTHERN LOGAN COUNTIES UNTIL 700
PM CDT...

AT 611 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 NEAR
ELKHART...OR 12 MILES SOUTHWEST OF LINCOLN...MOVING NORTHEAST AT 45 
MPH. ANOTHER SEVERE STORM WAS JUST NORTH OF SPRINGFIELD.

IN ADDITION...AT 604 PM...PING PONG BALL SIZE HAIL IN SHERMAN WITH 
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
  LINCOLN...CHESTNUT AND BROADWELL.

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.

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 3994 8968 4019 8948 4020 8926 4008 8915
      3986 8956
TIME...MOT...LOC 2316Z 224DEG 37KT 4004 8944
WIND...HAIL 60MPH 1.50IN

$$

833 
WWUS53 KILX 192335
SVSILX

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

ILC107-129-167-192345-
/O.CAN.KILX.SV.W.0041.000000T0000Z-110420T0000Z/
LOGAN IL-MENARD IL-SANGAMON IL-
635 PM CDT TUE APR 19 2011

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL SANGAMON...EAST
CENTRAL MENARD AND SOUTHERN LOGAN COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

ADDITIONAL STRONG THUNDERSTORMS ARE STILL POSSIBLE...AND A TORNADO 
WATCH REMAINS IN EFFECT UNTIL 900 PM CDT.

LAT...LON 3994 8968 4019 8948 4020 8926 4008 8915
      3986 8956
TIME...MOT...LOC 2335Z 224DEG 37KT 4018 8926

$$

MILLER

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, 5:40 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Sangamon	50 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, 6:12 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.