Alert archive / Indiana / Tornado Warnings in 2018

Tornado Warning 14, NWS Indianapolis, IN

December 1, 2018Warren County, Indiana

NWS Indianapolis, IN issued this tornado warning at Dec 1, 2018, 9:54 PM EST for Warren County, Indiana. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 1, 2018, 9:54 PM EST (02:54 UTC)
Expired: Dec 1, 2018, 10:15 PM EST
In force: 21 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.75 in

County Warren County, IN

The radar

The Indianapolis radar (KIND), 128 km from the middle of the area, began a volume at 02:57 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.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.9 hours before the alert went out and 103 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: 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

Open this sounding in Storm Lab

The text

As transmitted.

850 
WFUS53 KIND 020254
TORIND
INC171-020315-
/O.NEW.KIND.TO.W.0014.181202T0254Z-181202T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Indianapolis IN
954 PM EST SAT DEC 1 2018

The National Weather Service in Indianapolis has issued a

* Tornado Warning for...
  Northwestern Warren County in west central Indiana...

* Until 1015 PM EST.
    
* At 954 PM EST, a severe thunderstorm capable of producing a tornado
  was located 7 miles south of Talbot, moving northeast 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...
  Pine Village around 1010 PM EST.

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 4048 8748 4048 8719 4035 8749 4038 8753
      4044 8753
TIME...MOT...LOC 0254Z 226DEG 31KT 4039 8745 

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

$$

AW/PUMA

2 follow-up statements

367 
WWUS53 KIND 020306
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
1006 PM EST SAT DEC 1 2018

INC171-020315-
/O.CON.KIND.TO.W.0014.000000T0000Z-181202T0315Z/
Warren IN-
1006 PM EST SAT DEC 1 2018

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM EST FOR NORTH
CENTRAL WARREN COUNTY...
    
At 1006 PM EST, a severe thunderstorm capable of producing a tornado
was located near Boswell, or near Talbot, moving northeast 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 tornadic thunderstorm will remain over mainly rural areas of
north central Warren County.

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 4048 8748 4048 8719 4043 8733 4044 8744
      4046 8747
TIME...MOT...LOC 0306Z 226DEG 31KT 4046 8735 

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

$$

AW/PUMA

815 
WWUS53 KIND 020309
SVSIND

Severe Weather Statement
National Weather Service Indianapolis IN
1009 PM EST SAT DEC 1 2018

INC171-020318-
/O.EXP.KIND.TO.W.0014.000000T0000Z-181202T0315Z/
Warren IN-
1009 PM EST SAT DEC 1 2018

...THE TORNADO WARNING FOR NORTH CENTRAL WARREN COUNTY WILL EXPIRE AT
1015 PM EST...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 4048 8748 4048 8719 4043 8733 4044 8744
      4046 8747
TIME...MOT...LOC 0308Z 226DEG 31KT 4047 8734 

$$

AW/PUMA

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 1, 9:32 PM EST	Special Weather Statement	IND	Parke	43 min
Dec 1, 9:51 PM EST	Special Weather Statement	IND	Warren	24 min
Dec 1, 10:29 PM EST	River Flood Warning	IND	Jackson, Lawrence, Washington	71 hr

Nearby

Tornado Warnings in Indiana, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.