Alert archive / Indiana / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Louisville, KY

March 23, 2011Clark County, Floyd County, Harrison County, Indiana

NWS Louisville, KY issued this severe thunderstorm warning at Mar 23, 2011, 3:17 PM EDT for Clark County, Floyd County, Harrison County, Indiana. It was in force for 28 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: Mar 23, 2011, 3:17 PM EDT (19:17 UTC)
Expired: Mar 23, 2011, 3:45 PM EDT
In force: 28 min
Issued by: NWS Louisville, KY
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Clark County, IN, Floyd County, IN, Harrison County, IN

The radar

The Louisville radar (KLVX), 45 km from the middle of the area, began a volume at 19:20 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
Mar 23, 3:28 PM EDT	HAIL 0.5	New Salisbury, IN
Mar 23, 3:37 PM EDT	HAIL 0.5	Floyds Knobs, IN	HAIL WAS COVERING THE GROUND

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
Mar 23, 1:13 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 7.3 hours before the alert went out and 229 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: 1527 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 311 m²/s²
0-3 km storm-relative helicity: 327 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

738 
WUUS53 KLMK 231917
SVRLMK
INC019-043-061-231945-
/O.NEW.KLMK.SV.W.0039.110323T1917Z-110323T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE LOUISVILLE KY
317 PM EDT WED MAR 23 2011

THE NATIONAL WEATHER SERVICE IN LOUISVILLE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN CLARK COUNTY IN SOUTH CENTRAL INDIANA...
  NORTHERN FLOYD COUNTY IN SOUTH CENTRAL INDIANA...
  NORTHERN HARRISON COUNTY IN SOUTH CENTRAL INDIANA...

* UNTIL 345 PM EDT

* AT 315 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  HANCOCK CHAPEL...MOVING EAST AT 50 MPH.

*THE SEVERE THUNDERSTORM WILL ALSO IMPACT...
  GREENVILLE...
  SCOTTSVILLE AND NAVILLETON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING TO THE NATIONAL
WEATHER SERVICE...CALL TOLL FREE AT...1...8 7 7...6 3 3...6 7 7 2...
WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3829 8580 3833 8627 3835 8627 3835 8625
      3838 8626 3841 8626 3841 8610 3841 8600
      3842 8599 3842 8582
TIME...MOT...LOC 1916Z 265DEG 45KT 3838 8615
WIND...HAIL 60MPH 1.00IN

$$

TWF

1 follow-up statement

290 
WWUS53 KLMK 231935
SVSLMK

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE LOUISVILLE KY
335 PM EDT WED MAR 23 2011

INC019-043-061-231945-
/O.CON.KLMK.SV.W.0039.000000T0000Z-110323T1945Z/
CLARK IN-HARRISON IN-FLOYD IN-
335 PM EDT WED MAR 23 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR NORTHERN FLOYD...NORTHERN HARRISON AND WESTERN CLARK COUNTIES...

AT 330 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR NAVILLETON...MOVING EAST AT 50 MPH.

THE SEVERE THUNDERSTORM WILL OTHERWISE IMPACT MAINLY RURAL AREAS OF
NORTHERN FLOYD...NORTHERN HARRISON AND WESTERN CLARK COUNTIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT DAMAGING WINDS...LARGE HAIL...OR FLOODING TO THE NATIONAL
WEATHER SERVICE...CALL TOLL FREE AT...1...8 7 7...6 3 3...6 7 7 2...
WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3829 8580 3833 8627 3838 8610 3839 8598
      3842 8593 3842 8582
TIME...MOT...LOC 1935Z 265DEG 45KT 3840 8585
WIND...HAIL 60MPH 1.00IN

$$

JSD

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 23, 1:56 PM EDT	Severe Thunderstorm Warning	LMK	Orange, Washington	34 min
Mar 23, 2:20 PM EDT	Severe Thunderstorm Warning	LMK	Washington	25 min
Mar 23, 2:29 PM EDT	Severe Thunderstorm Warning	LMK	Orange, Washington	29 min
Mar 23, 2:33 PM EDT	Special Weather Statement	LMK	Crawford	27 min
Mar 23, 2:43 PM EDT	Severe Thunderstorm Warning	LMK	Jefferson, Scott	32 min
Mar 23, 2:51 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Jefferson, Scott	24 min
Mar 23, 3:15 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Jefferson	23 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2011 Every severe thunderstorm warning in 2011

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.