Alert archive / Illinois / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 4, NWS Lincoln, IL

February 28, 2017Morgan County, Scott County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at Feb 28, 2017, 4:33 PM CST for Morgan County, Scott County, Illinois. It was in force for 29 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: Feb 28, 2017, 4:33 PM CST (22:33 UTC)
Expired: Feb 28, 2017, 5:02 PM CST
In force: 29 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Morgan County, IL, Scott County, IL

The radar

The Lincoln radar (KILX), 93 km from the middle of the area, began a volume at 22:32 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
Feb 28, 4:40 PM CST	HAIL 1.75	Alsey, 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
Feb 28, 2:57 PM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.6 hours before the alert went out and 149 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: 569 m above ground
0-6 km bulk shear: 67 kt
0-1 km storm-relative helicity: 276 m²/s²
0-3 km storm-relative helicity: 285 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

515 
WUUS53 KILX 282233
SVRILX
ILC137-171-282315-
/O.NEW.KILX.SV.W.0004.170228T2233Z-170228T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
433 PM CST TUE FEB 28 2017

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Southeastern Scott County in west central Illinois...
  Morgan County in west central Illinois...

* Until 515 PM CST

* At 433 PM CST, a severe thunderstorm was located over Alsey, or
  near Winchester, moving northeast at 65 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Jacksonville, Winchester, Alexander, Franklin, Murrayville,
  Woodson, Manchester, Alsey, Literberry, South Jacksonville,
  Glasgow, Lynnville, Jacksonville Municipal Airport, Sinclair, Lake
  Jacksonville, Riggston, Merritt, Nortonville and Prentice.

This includes Interstate 72 between mile markers 52 and 79.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one 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 1000 PM CST for west central
and central Illinois.

LAT...LON 3987 9024 3987 9000 3955 8997 3952 9007
      3952 9058 3958 9058
TIME...MOT...LOC 2233Z 230DEG 57KT 3953 9047 

HAIL...1.00IN
WIND...60MPH
 
$$

Shimon

3 follow-up statements

362 
WWUS53 KILX 282246
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
446 PM CST TUE FEB 28 2017

ILC137-171-282315-
/O.CON.KILX.SV.W.0004.000000T0000Z-170228T2315Z/
Scott-Morgan-
446 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CST
FOR SOUTHEASTERN SCOTT AND MORGAN COUNTIES...

At 445 PM CST, a severe thunderstorm was located over Woodson, or
near Jacksonville, moving northeast at 75 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...People and animals outdoors will be injured. Expect hail 
         damage to roofs, siding, windows, and vehicles. Expect wind 
         damage to roofs, siding, and trees. 

Locations impacted include...
Jacksonville, Alexander, Franklin, Murrayville, Woodson, Manchester,
Literberry, South Jacksonville, Lynnville, Jacksonville Municipal
Airport, Sinclair, Lake Jacksonville, Nortonville and Prentice.

This includes Interstate 72 between mile markers 56 and 79.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one is spotted act quickly and move to a place
of safety inside a sturdy structure, such as a basement or small
interior room.

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

A tornado watch remains in effect until 1000 PM CST for west central
and central Illinois.

LAT...LON 3987 9024 3987 9000 3955 8997 3952 9007
      3952 9040 3969 9040
TIME...MOT...LOC 2245Z 233DEG 63KT 3966 9025 

HAIL...1.75IN
WIND...60MPH
 
$$

Shimon

048 
WWUS53 KILX 282255
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
455 PM CST TUE FEB 28 2017

ILC171-282304-
/O.CAN.KILX.SV.W.0004.000000T0000Z-170228T2315Z/
Scott-
455 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN SCOTT COUNTY IS
CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.

A tornado watch remains in effect until 1000 PM CST for west central
and central Illinois.

LAT...LON 3984 9023 3987 9000 3964 8998 3963 9007
      3961 9022 3974 9030
TIME...MOT...LOC 2254Z 230DEG 57KT 3976 9010 

$$

ILC137-282315-
/O.CON.KILX.SV.W.0004.000000T0000Z-170228T2315Z/
Morgan-
455 PM CST TUE FEB 28 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CST
FOR NORTHEASTERN MORGAN COUNTY...

At 454 PM CST, a severe thunderstorm was located near Alexander, or 7
miles east of Jacksonville, moving northeast at 65 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
Jacksonville, Alexander, Woodson, South Jacksonville, Jacksonville
Municipal Airport, Lake Jacksonville, Sinclair and Prentice.

This includes Interstate 72 between mile markers 63 and 79.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch remains in effect for the warned area. Tornadoes can
develop quickly from severe thunderstorms. Although a tornado is not
immediately likely, if one 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 1000 PM CST for west central
and central Illinois.

LAT...LON 3984 9023 3987 9000 3964 8998 3963 9007
      3961 9022 3974 9030
TIME...MOT...LOC 2254Z 230DEG 57KT 3976 9010 

HAIL...1.00IN
WIND...60MPH
 
$$

Shimon

241 
WWUS53 KILX 282302
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
502 PM CST TUE FEB 28 2017

ILC137-282312-
/O.CAN.KILX.SV.W.0004.000000T0000Z-170228T2315Z/
Morgan-
502 PM CST TUE FEB 28 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MORGAN COUNTY IS
CANCELLED...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.

A tornado watch remains in effect until 1000 PM CST for west central
and central Illinois.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Lincoln.

LAT...LON 3984 9023 3987 9000 3964 8998 3963 9007
      3961 9022 3974 9030
TIME...MOT...LOC 2259Z 230DEG 57KT 3984 8997 

$$

Shimon

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 3:35 PM CST	Severe Thunderstorm Warning	ILX	Stark	25 min
Feb 28, 3:50 PM CST	Severe Thunderstorm Warning	ILX	Knox	26 min
Feb 28, 4:11 PM CST	Severe Thunderstorm Warning	ILX	Knox	36 min
Feb 28, 4:44 PM CST	Severe Thunderstorm Warning	ILX	Marshall, Peoria, Stark	51 min
Feb 28, 5:05 PM CST	Tornado Warning	ILX	Marshall, Peoria, Woodford	25 min
Feb 28, 5:28 PM CST	Tornado Warning Tornado observed	ILX	Marshall, Woodford	32 min
Feb 28, 5:32 PM CST	Severe Thunderstorm Warning	ILX	Marshall	28 min
Feb 28, 5:36 PM CST	Tornado Warning	ILX	Christian	24 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2017 Every severe thunderstorm warning in 2017

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.