Alert archive / Illinois / Tornado Warnings in 2018
Tornado Warning 31, NWS Lincoln, IL
NWS Lincoln, IL issued this tornado warning at Dec 1, 2018, 6:42 PM CST for DeWitt County, McLean County, Illinois. It was in force for 33 min. 2 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
- Dec 1, 2018, 6:42 PM CST (00:42 UTC)
- Expired
- Dec 1, 2018, 7:15 PM CST
- In force
- 33 min
- Issued by
- NWS Lincoln, IL
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties DeWitt County, IL, McLean County, IL
The radar
The Lincoln radar (KILX), 40 km from the middle of the area, began a volume at 00:41 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 |
|---|---|---|---|
| Dec 1, 7:06 PM CST | TORNADO 1 | 4 Ssw Le Roy, IL | PATH LENGGTH 1 MILE, MAX WIDTH 50 YARDS, PEAK WIND SPEED 90 MPH. WAS ON THE GROUND FOR 2 MINUTES, LIFTING 3.5 MILES SOUTH SOUTHWEST OF LE ROY. |
| Dec 1, 7:06 PM CST | TORNADO | 4 Ssw Le Roy, IL | NWS SURVEY RATES TORNADO AS EF-1. |
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 |
|---|---|---|---|
| Dec 1, 2:16 PM CST | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 0.7 hours before the alert went out and 23 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.
- Mixed-layer CAPE
- 653 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 628 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 392 m²/s²
- 0-3 km storm-relative helicity
- 444 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 6.5
The text
As transmitted.
091
WFUS53 KILX 020042
TORILX
ILC039-113-020115-
/O.NEW.KILX.TO.W.0031.181202T0042Z-181202T0115Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Lincoln IL
642 PM CST SAT DEC 1 2018
The National Weather Service in Lincoln has issued a
* Tornado Warning for...
Central De Witt County in central Illinois...
South central McLean County in central Illinois...
* Until 715 PM CST.
* At 642 PM CST, a severe thunderstorm capable of producing a tornado
was located near Clinton, moving north at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This dangerous storm will be near...
Wapella around 655 PM CST.
Le Roy around 710 PM CST.
Other locations impacted by this tornadic thunderstorm include Lane,
Clinton Lake Dam, De Witt and Weldon Springs State Park.
This includes Interstate 74 between mile markers 147 and 152.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 4005 8886 4005 8900 4037 8894 4035 8869
TIME...MOT...LOC 0042Z 196DEG 34KT 4012 8890
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Auten1 follow-up statement
511
WWUS53 KILX 020106
SVSILX
Severe Weather Statement
National Weather Service Lincoln IL
706 PM CST SAT DEC 1 2018
ILC039-113-020115-
/O.CON.KILX.TO.W.0031.000000T0000Z-181202T0115Z/
De Witt-McLean-
706 PM CST SAT DEC 1 2018
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 715 PM CST FOR
NORTHEASTERN DE WITT AND SOUTHEASTERN MCLEAN COUNTIES...
At 705 PM CST, a severe thunderstorm capable of producing a tornado
was located south of Le Roy, or 13 miles northeast of Clinton,
moving north at 35 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
This dangerous storm will be near...
Le Roy around 715 PM CST.
This includes Interstate 74 between mile markers 147 and 152.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 4026 8876 4027 8884 4036 8882 4035 8869
TIME...MOT...LOC 0105Z 199DEG 30KT 4029 8879
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
AutenThe office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 1, 6:13 PM CST | Tornado Warning | ILX | DeWitt, Macon | 32 min |
| Dec 1, 6:27 PM CST | Flash Flood Warning | ILX | Tazewell | 3 hr |
| Dec 1, 7:13 PM CST | Tornado Warning | ILX | McLean | 32 min |
| Dec 1, 7:47 PM CST | Tornado Warning | ILX | McLean | 28 min |
| Dec 1, 8:53 PM CST | River Flood Warning | ILX | Clay, Richland | 13 hr |
Nearby
Tornado Warnings in Illinois, 2018Every tornado warning in 2018Tornadoes in 2018
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.