Alert archive / Illinois / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 15, NWS Lincoln, IL

May 3, 2021Christian County, Macon County, Sangamon County, Illinois

NWS Lincoln, IL issued this severe thunderstorm warning at May 3, 2021, 6:37 PM CDT for Christian County, Macon County, Sangamon County, Illinois. It was in force for 53 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 3, 2021, 6:37 PM CDT (23:37 UTC)
Expired: May 3, 2021, 7:30 PM CDT
In force: 53 min
Issued by: NWS Lincoln, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Christian County, IL, Macon County, IL, Sangamon County, IL

The radar

The Lincoln radar (KILX), 55 km from the middle of the area, began a volume at 23:41 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 3, 7:18 PM CDT	HAIL 1	1 S Macon, 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
May 3, 2:47 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 11.6 hours before the alert went out and 73 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: 460 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

227 
WUUS53 KILX 032337
SVRILX
ILC021-115-167-040030-
/O.NEW.KILX.SV.W.0015.210503T2337Z-210504T0030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lincoln IL
637 PM CDT Mon May 3 2021

The National Weather Service in Lincoln has issued a

* Severe Thunderstorm Warning for...
  Northern Christian County in central Illinois...
  East central Sangamon County in central Illinois...
  Southern Macon County in central Illinois...

* Until 730 PM CDT.

* At 636 PM CDT, severe thunderstorms were located along a line
  extending from Mechanicsburg to near Rochester, moving east at 40
  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...
  Mount Zion, Moweaqua, Blue Mound, Macon, Edinburg, Stonington,
  Mechanicsburg, Mount Auburn, Berry, Sangchris Lake State Park,
  Boody, Willeys, Roby, Hervey City and Elwin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3966 8958 3982 8946 3977 8879 3965 8894
      3965 8902 3959 8902 3956 8906
TIME...MOT...LOC 2336Z 282DEG 36KT 3979 8939 3967 8950 

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

Shimon

4 follow-up statements

432 
WWUS53 KILX 032346
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
646 PM CDT Mon May 3 2021

ILC167-032356-
/O.CAN.KILX.SV.W.0015.000000T0000Z-210504T0030Z/
Sangamon-
646 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SANGAMON COUNTY
IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
central Illinois.

LAT...LON 3965 8946 3980 8925 3977 8879 3965 8894
      3965 8902 3959 8902 3956 8906
TIME...MOT...LOC 2346Z 282DEG 36KT 3977 8927 3965 8938 

$$

ILC021-115-040030-
/O.CON.KILX.SV.W.0015.000000T0000Z-210504T0030Z/
Christian-Macon-
646 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHERN CHRISTIAN AND SOUTHERN MACON COUNTIES...

At 646 PM CDT, severe thunderstorms were located along a line
extending from Mount Auburn to Edinburg, moving east at 40 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...
Mount Zion, Moweaqua, Blue Mound, Macon, Edinburg, Stonington, Mount
Auburn, Boody, Willeys, Hervey City and Elwin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3965 8946 3980 8925 3977 8879 3965 8894
      3965 8902 3959 8902 3956 8906
TIME...MOT...LOC 2346Z 282DEG 36KT 3977 8927 3965 8938 

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

Shimon

338 
WWUS53 KILX 032356
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
656 PM CDT Mon May 3 2021

ILC021-115-040030-
/O.CON.KILX.SV.W.0015.000000T0000Z-210504T0030Z/
Christian-Macon-
656 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHEASTERN CHRISTIAN AND SOUTHERN MACON COUNTIES...

At 655 PM CDT, severe thunderstorms were located along a line
extending from near Blue Mound to near Stonington, moving east at 45
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...
Mount Zion, Moweaqua, Blue Mound, Macon, Stonington, Boody, Hervey
City and Elwin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Lincoln.

&&

LAT...LON 3964 8932 3979 8913 3977 8879 3965 8894
      3965 8902 3959 8902 3956 8906
TIME...MOT...LOC 2355Z 279DEG 40KT 3975 8912 3966 8927 

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

Shimon

085 
WWUS53 KILX 040018
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
718 PM CDT Mon May 3 2021

ILC021-115-040030-
/O.CON.KILX.SV.W.0015.000000T0000Z-210504T0030Z/
Christian-Macon-
718 PM CDT Mon May 3 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM CDT
FOR NORTHEASTERN CHRISTIAN AND SOUTHEASTERN MACON COUNTIES...

At 718 PM CDT, a severe thunderstorm was located over Macon, or 12
miles south of Decatur, moving east at 30 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...
Mount Zion, Moweaqua, Macon and Hervey City. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Lincoln.

&&

LAT...LON 3970 8910 3977 8887 3977 8879 3965 8894
      3965 8902 3959 8902 3964 8908
TIME...MOT...LOC 0018Z 280DEG 28KT 3968 8901 

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

Shimon

685 
WWUS53 KILX 040028
SVSILX

Severe Weather Statement
National Weather Service Lincoln IL
728 PM CDT Mon May 3 2021

ILC021-115-040037-
/O.EXP.KILX.SV.W.0015.000000T0000Z-210504T0030Z/
Christian-Macon-
728 PM CDT Mon May 3 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CHRISTIAN AND
SOUTHEASTERN MACON COUNTIES WILL EXPIRE AT 730 PM CDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.  However hail is 
still possible with this thunderstorm.

A Severe Thunderstorm Watch remains in effect until 900 PM CDT for
central Illinois.

Remember, a Severe Thunderstorm Warning still remains in effect for
SE Macon County until 8 pm CDT.

LAT...LON 3970 8910 3977 8887 3977 8879 3965 8894
      3965 8902 3959 8902 3964 8908
TIME...MOT...LOC 0027Z 282DEG 36KT 3966 8892 

$$

Shimon

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 3:31 PM CDT	Special Weather Statement	ILX	Knox	29 min
May 3, 3:59 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Morgan, Schuyler	46 min
May 3, 4:10 PM CDT	Special Weather Statement	ILX	Schuyler	35 min
May 3, 4:30 PM CDT	Special Weather Statement	ILX	Fulton	30 min
May 3, 4:43 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Menard, Morgan, Sangamon, Schuyler	47 min
May 3, 4:50 PM CDT	Tornado Warning	ILX	Cass, Morgan	25 min
May 3, 5:00 PM CDT	Special Weather Statement	ILX	Mason, Menard	30 min
May 3, 5:08 PM CDT	Tornado Warning	ILX	Cass, Menard, Morgan, Sangamon	37 min
May 3, 5:17 PM CDT	Severe Thunderstorm Warning	ILX	Cass, Logan, Mason, Menard	43 min
May 3, 5:25 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	33 min
May 3, 5:30 PM CDT	Tornado Warning Tornado observed	ILX	Menard, Sangamon	30 min
May 3, 5:52 PM CDT	Tornado Warning	ILX	Logan, Menard, Sangamon	23 min
May 3, 6:02 PM CDT	Special Weather Statement	ILX	Logan	43 min
May 3, 6:16 PM CDT	Tornado Warning Tornado observed	ILX	Christian, Logan, Macon, Sangamon	29 min
May 3, 6:42 PM CDT	Tornado Warning Tornado observed	ILX	Macon	33 min
May 3, 6:54 PM CDT	Severe Thunderstorm Warning	ILX	Christian, Sangamon	51 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2021 Every severe thunderstorm warning in 2021

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.