Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 20, NWS Louisville, KY

March 25, 2021Jefferson County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Mar 25, 2021, 11:39 PM EDT for Jefferson 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: Mar 25, 2021, 11:39 PM EDT (03:39 UTC)
Expired: Mar 26, 2021, 12:00 AM EDT
In force: 21 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 70.0 mph

County Jefferson County, IN

The radar

The Louisville radar (KLVX), 111 km from the middle of the area, began a volume at 03:40 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

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.7 hours before the alert went out and 143 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: 1 J/kg
Mixed-layer CIN: -281 J/kg
Mixed-layer LCL: 753 m above ground
0-6 km bulk shear: 75 kt
0-1 km storm-relative helicity: 290 m²/s²
0-3 km storm-relative helicity: 340 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

318 
WUUS53 KLMK 260339
SVRLMK
INC077-260400-
/O.NEW.KLMK.SV.W.0020.210326T0339Z-210326T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
1139 PM EDT Thu Mar 25 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Northeastern Jefferson County in south central Indiana...

* Until midnight EDT.

* At 1138 PM EDT, a severe thunderstorm was located 7 miles northeast
  of Madison, moving northeast at 65 mph.

  HAZARD...70 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect considerable 
           tree damage. Wind damage is also likely to mobile homes, 
           roofs, and outbuildings.

* Locations impacted include...
  Canaan, Manville, China and Barbersville. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3877 8520 3874 8527 3874 8533 3887 8536
      3891 8528 3892 8520
TIME...MOT...LOC 0338Z 238DEG 57KT 3882 8529 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...70MPH
 
$$

CG

1 follow-up statement

279 
WWUS53 KLMK 260353
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
1153 PM EDT Thu Mar 25 2021

INC077-260402-
/O.EXP.KLMK.SV.W.0020.000000T0000Z-210326T0400Z/
Jefferson IN-
1153 PM EDT Thu Mar 25 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN JEFFERSON COUNTY
WILL EXPIRE AT MIDNIGHT EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore, the warning will be allowed to expire.

LAT...LON 3877 8520 3874 8527 3874 8533 3887 8536
      3891 8528 3892 8520
TIME...MOT...LOC 0352Z 238DEG 57KT 3891 8510 

$$

CG

The office that day

Everything else NWS Louisville, KY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 25, 8:43 PM EDT	Special Weather Statement	LMK	Dubois	17 min
Mar 25, 9:28 PM EDT	Special Weather Statement	LMK	Dubois, Perry	32 min
Mar 25, 9:55 PM EDT	Special Weather Statement	LMK	Crawford, Orange, Perry, Washington	35 min
Mar 25, 10:35 PM EDT	Special Weather Statement	LMK	Washington	25 min
Mar 25, 11:09 PM EDT	Special Weather Statement	LMK	Jefferson	36 min

Nearby

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