Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 87, NWS Indianapolis, IN

April 1, 2012Bartholomew County, Decatur County, Shelby County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Apr 1, 2012, 11:14 PM EDT for Bartholomew County, Decatur County, Shelby County, Indiana. It was in force for 46 min. 1 report 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: Apr 1, 2012, 11:14 PM EDT (03:14 UTC)
Expired: Apr 2, 2012, 12:00 AM EDT
In force: 46 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Bartholomew County, IN, Decatur County, IN, Shelby County, IN

The radar

The Indianapolis radar (KIND), 65 km from the middle of the area, began a volume at 03:15 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
Apr 1, 11:28 PM EDT	HAIL 0.88	Shelbyville, IN

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
Apr 1, 10:03 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.2 hours before the alert went out and 164 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: 663 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 943 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.4

Open this sounding in Storm Lab

The text

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

744 
WUUS53 KIND 020314
SVRIND
INC005-031-145-020400-
/O.NEW.KIND.SV.W.0087.120402T0314Z-120402T0400Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1114 PM EDT SUN APR 1 2012

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN BARTHOLOMEW COUNTY IN CENTRAL INDIANA...
  SOUTHWESTERN DECATUR COUNTY IN CENTRAL INDIANA...
  SHELBY COUNTY IN CENTRAL INDIANA...

* UNTIL MIDNIGHT EDT

* AT 1111 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR SHELBYVILLE...AND MOVING SOUTHEAST AT 30
  MPH.

* LOCATIONS IMPACTED INCLUDE...
  SHELBYVILLE...
  MARIETTA...
  WALDRON...
  FLAT ROCK...
  GENEVA...
  MILFORD...
  HOPE...
  BURNEY...
  HARTSVILLE...
  NEWBERN...
  LETTS...
  WESTPORT...
  GRAMMER...

THIS INCLUDES INTERSTATE 74 BETWEEN MILE MARKERS 104 AND 121.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 3915 8552 3913 8564 3913 8578 3954 8596
      3962 8595 3968 8577 3917 8550
TIME...MOT...LOC 0315Z 337DEG 27KT 3955 8582
WIND...HAIL <50MPH 1.00IN

$$

AB/RYAN

2 follow-up statements

582 
WWUS53 KIND 020326
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1126 PM EDT SUN APR 1 2012

INC005-031-145-020400-
/O.CON.KIND.SV.W.0087.000000T0000Z-120402T0400Z/
BARTHOLOMEW-DECATUR-SHELBY-
1126 PM EDT SUN APR 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
DECATUR...NORTHEASTERN BARTHOLOMEW AND SOUTHERN SHELBY COUNTIES UNTIL
MIDNIGHT EDT...

AT 1124 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED NEAR SHELBYVILLE...MOVING SOUTHEAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  WALDRON...FLAT ROCK...GENEVA...MILFORD...HOPE...BURNEY...
  HARTSVILLE...NEWBERN...LETTS...WESTPORT AND GRAMMER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN INDIANAPOLIS.

&&

LAT...LON 3916 8551 3915 8553 3913 8564 3913 8578
      3952 8595 3959 8572 3917 8550
TIME...MOT...LOC 0327Z 337DEG 27KT 3947 8578
WIND...HAIL <50MPH 1.00IN

$$

RYAN

770 
WWUS53 KIND 020338
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1138 PM EDT SUN APR 1 2012

INC005-031-145-020400-
/O.CON.KIND.SV.W.0087.000000T0000Z-120402T0400Z/
BARTHOLOMEW-DECATUR-SHELBY-
1138 PM EDT SUN APR 1 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
DECATUR...NORTHEASTERN BARTHOLOMEW AND SOUTHEASTERN SHELBY COUNTIES
UNTIL MIDNIGHT EDT...

AT 1136 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 8 MILES SOUTHEAST OF SHELBYVILLE...MOVING SOUTHEAST
AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
  GENEVA...MILFORD...BURNEY...HARTSVILLE...LETTS AND WESTPORT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW
INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN INDIANAPOLIS.

&&

LAT...LON 3916 8551 3915 8553 3914 8567 3949 8583
      3953 8569 3917 8550
TIME...MOT...LOC 0338Z 337DEG 27KT 3941 8571
WIND...HAIL <50MPH 1.00IN

$$

RYAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 1, 9:28 PM EDT	Special Weather Statement	IND	Delaware	47 min
Apr 1, 9:32 PM EDT	Special Weather Statement	IND	Hamilton	43 min
Apr 1, 9:42 PM EDT	Severe Thunderstorm Warning	IND	Hamilton, Hancock, Henry, Madison	33 min
Apr 1, 9:52 PM EDT	Severe Thunderstorm Warning	IND	Boone, Hamilton, Marion	23 min
Apr 1, 10:14 PM EDT	Severe Thunderstorm Warning	IND	Hancock, Henry, Rush	31 min
Apr 1, 10:16 PM EDT	Severe Thunderstorm Warning	IND	Hamilton, Hancock, Marion, Shelby	29 min
Apr 1, 10:44 PM EDT	Severe Thunderstorm Warning	IND	Rush	31 min
Apr 1, 10:45 PM EDT	Severe Thunderstorm Warning	IND	Hancock, Marion, Shelby	30 min
Apr 1, 11:09 PM EDT	Severe Thunderstorm Warning	IND	Decatur, Rush	36 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2012 Every severe thunderstorm warning in 2012

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.