Alert archive / Illinois / Tornado Warnings in 2018

Tornado Warning 17, NWS St. Louis, MO

December 1, 2018Pike County, Illinois

NWS St. Louis, MO issued this tornado warning at Dec 1, 2018, 2:37 PM CST for Pike County, Illinois. It was in force for 25 min. 3 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, 2:37 PM CST (20:37 UTC)
Expired: Dec 1, 2018, 3:02 PM CST
In force: 25 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Pike County, IL

The radar

The St Louis radar (KLSX), 118 km from the middle of the area, began a volume at 20:37 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, 2:40 PM CST	TORNADO	1 Nnw Valley City, IL	NWS DAMAGE SURVEY CREW CONFIRMED AN EF-1 TORNADO NEAR VALLEY CITY ILLINOIS WITH MAX WINDS OF 110 MPH. PATH LENGTH WAS 0.6 MILES. PATH WIDTH WAS 110 YARDS.
Dec 1, 2:43 PM CST	TORNADO	2 N Valley City, IL
Dec 1, 3:01 PM CST	TSTM WND DMG	1 N Valley City, IL	POWER LINES DOWN NORTH OF VALLEY CITY.

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 12:00Z, 8.6 hours before the alert went out and 179 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: 430 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 529 m²/s²
0-3 km storm-relative helicity: 658 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

372 
WFUS53 KLSX 012037
TORLSX
ILC149-012115-
/O.NEW.KLSX.TO.W.0017.181201T2037Z-181201T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service St Louis MO
237 PM CST SAT DEC 1 2018

The National Weather Service in St Louis has issued a

* Tornado Warning for...
  Northeastern Pike County in west central Illinois...

* Until 315 PM CST.
    
* At 237 PM CST, a severe thunderstorm capable of producing a tornado
  was located over Griggsville, moving northeast 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 tornadic thunderstorm will remain over mainly rural areas of
  northeastern Pike County in west central Illinois, including the
  following locations... Valley City and Chambersburg.

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 3980 9059 3978 9061 3977 9061 3973 9063
      3972 9064 3969 9064 3966 9066 3968 9073
      3984 9067 3984 9057
TIME...MOT...LOC 2037Z 203DEG 34KT 3970 9069 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CVKING

4 follow-up statements

803 
WWUS53 KLSX 012042
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
242 PM CST SAT DEC 1 2018

ILC149-012115-
/O.CON.KLSX.TO.W.0017.000000T0000Z-181201T2115Z/
Pike IL-
242 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CST FOR
NORTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
        
At 242 PM CST, a severe thunderstorm capable of producing a tornado
was located near Naples, moving north at 40 mph.

HAZARD...Tornado.

SOURCE...Weather spotters have reported a funnel cloud with this 
         storm.

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.

Locations impacted include...
Chambersburg.

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 3980 9059 3978 9061 3977 9061 3973 9063
      3972 9064 3973 9071 3984 9067 3984 9057
TIME...MOT...LOC 2042Z 194DEG 33KT 3974 9066 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CVKING

672 
WWUS53 KLSX 012045 CCA
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
245 PM CST SAT DEC 1 2018

ILC149-012115-
/O.COR.KLSX.TO.W.0017.000000T0000Z-181201T2115Z/
Pike IL-
245 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CST FOR
NORTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
    
At 245 PM CST, a confirmed tornado was located over Naples, moving
north at 40 mph.

HAZARD...Damaging tornado and quarter size hail.

SOURCE...Weather spotters confirmed tornado near I-72 and Highway 
         100.

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.

Locations impacted include...
Chambersburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a tornado is on the ground. 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 3980 9059 3978 9061 3977 9061 3973 9063
      3972 9064 3973 9071 3984 9067 3984 9057
TIME...MOT...LOC 2042Z 194DEG 33KT 3974 9066 

TORNADO...OBSERVED
HAIL...1.00IN

$$

CVKING

483 
WWUS53 KLSX 012057
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
257 PM CST SAT DEC 1 2018

ILC149-012115-
/O.CON.KLSX.TO.W.0017.000000T0000Z-181201T2115Z/
Pike IL-
257 PM CST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 315 PM CST FOR
NORTHEASTERN PIKE COUNTY IN WEST CENTRAL ILLINOIS...
        
At 256 PM CST, a severe thunderstorm capable of producing a tornado
was located over Meredosia, moving northeast at 25 mph.

HAZARD...Tornado.

SOURCE...Weather spotters continue to report funnel clouds with this 
         storm.

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 tornadic thunderstorm will remain over mainly rural areas of
northeastern Pike County in west central Illinois.

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 3980 9059 3978 9061 3981 9062 3984 9060
      3984 9057
TIME...MOT...LOC 2056Z 205DEG 21KT 3983 9057 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

CVKING

510 
WWUS53 KLSX 012102
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
302 PM CST SAT DEC 1 2018

ILC149-012112-
/O.CAN.KLSX.TO.W.0017.000000T0000Z-181201T2115Z/
Pike IL-
302 PM CST SAT DEC 1 2018

...THE TORNADO WARNING FOR NORTHEASTERN PIKE COUNTY IN WEST CENTRAL
ILLINOIS IS CANCELLED...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning has been cancelled.

A Tornado Watch remains in effect until 700 PM CST for west central
Illinois.

LAT...LON 3980 9059 3978 9061 3981 9062 3984 9060
      3984 9057
TIME...MOT...LOC 2101Z 194DEG 33KT 3989 9055 

$$

CVKING

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 1, 3:54 AM CST	Severe Thunderstorm Warning	LSX	Randolph	29 min
Dec 1, 2:17 PM CST	Severe Thunderstorm Warning	LSX	Pike	43 min
Dec 1, 2:21 PM CST	Severe Thunderstorm Warning	LSX	Adams, Brown	20 min
Dec 1, 2:28 PM CST	Severe Thunderstorm Warning	LSX	Pike	30 min
Dec 1, 3:34 PM CST	Severe Thunderstorm Warning	LSX	Greene, Jersey	41 min
Dec 1, 3:57 PM CST	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	48 min
Dec 1, 4:08 PM CST	Tornado Warning	LSX	Macoupin, Montgomery	37 min
Dec 1, 4:28 PM CST	Tornado Warning Tornado observed	LSX	Montgomery	17 min
Dec 1, 4:32 PM CST	Tornado Warning Tornado observedConsiderable damage threat	LSX	Montgomery	28 min
Dec 1, 4:39 PM CST	Severe Thunderstorm Warning	LSX	Macoupin	51 min
Dec 1, 4:43 PM CST	Tornado Warning	LSX	Montgomery	14 min

Nearby

Tornado Warnings in Illinois, 2018 Every tornado warning in 2018 Tornadoes 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.