Alert archive / Indiana / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 85, NWS Louisville, KY

July 10, 2021Clark County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Jul 10, 2021, 7:25 PM EDT for Clark County, Indiana. It was in force for 20 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
Jul 10, 2021, 7:25 PM EDT (23:25 UTC)
Expired
Jul 10, 2021, 7:45 PM EDT
In force
20 min
Issued by
NWS Louisville, KY
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Clark County, IN

The radar

The Louisville radar (KLVX), 61 km from the middle of the area, began a volume at 23:29 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 12:00Z, 11.4 hours before the alert went out and 203 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2021-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2021-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
866 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
117 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

655 
WUUS53 KLMK 102325
SVRLMK
INC019-102345-
/O.NEW.KLMK.SV.W.0085.210710T2325Z-210710T2345Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Louisville KY
725 PM EDT Sat Jul 10 2021

The National Weather Service in Louisville has issued a

* Severe Thunderstorm Warning for...
  Northwestern Clark County in south central Indiana...

* Until 745 PM EDT.

* At 724 PM EDT, a severe thunderstorm was located 12 miles north of
  New Albany, moving north at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Clark County, including the following locations...
  Henryville, Starlight, Carwood, Blue Lick, Wilson, Memphis and
  Borden.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3841 8583 3841 8593 3850 8592 3850 8589
      3852 8588 3852 8587 3855 8587 3855 8585
      3856 8585 3856 8582 3860 8579 3861 8572
      3861 8570
TIME...MOT...LOC 2324Z 195DEG 24KT 3846 8587 

HAIL...<.75IN
WIND...60MPH
 
$$

RAS
1 follow-up statement
378 
WWUS53 KLMK 102348
SVSLMK

Severe Weather Statement
National Weather Service Louisville KY
748 PM EDT Sat Jul 10 2021

INC019-102358-
/O.EXP.KLMK.SV.W.0085.000000T0000Z-210710T2345Z/
Clark IN-
748 PM EDT Sat Jul 10 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN CLARK COUNTY HAS
EXPIRED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been allowed to expire.  However gusty 
winds near 40 mph and heavy rain are still possible with this 
thunderstorm.

LAT...LON 3841 8583 3841 8593 3850 8592 3850 8589
      3852 8588 3852 8587 3855 8587 3855 8585
      3856 8585 3856 8582 3860 8579 3861 8572
      3861 8570
TIME...MOT...LOC 2348Z 195DEG 24KT 3861 8582 

$$

RAS

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 3:48 AM EDTFlash Flood WatchLMKClark, Crawford, Dubois, Floyd, Harrison, Orange and 3 more26 hr
Jul 10, 6:47 AM EDTSpecial Weather StatementLMKPerry28 min
Jul 10, 6:59 AM EDTSpecial Weather StatementLMKDubois46 min
Jul 10, 6:06 PM EDTSpecial Weather StatementLMKDubois, Perry39 min
Jul 10, 6:39 PM EDTSpecial Weather StatementLMKFloyd, Harrison36 min
Jul 10, 6:42 PM EDTSpecial Weather StatementLMKCrawford, Dubois, Orange33 min
Jul 10, 6:56 PM EDTSevere Thunderstorm WarningLMKFloyd34 min
Jul 10, 7:08 PM EDTSevere Thunderstorm WarningLMKCrawford, Orange, Washington37 min
Jul 10, 7:14 PM EDTSpecial Weather StatementLMKClark46 min
Jul 10, 7:35 PM EDTSpecial Weather StatementLMKOrange25 min
Jul 10, 7:51 PM EDTSpecial Weather StatementLMKJefferson, Scott, Washington24 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2021Every 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.