Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 231, NWS Indianapolis, IN

September 7, 20124 counties in Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Sep 7, 2012, 12:22 PM EDT for 4 counties in Indiana. It was in force for 38 min. 3 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: Sep 7, 2012, 12:22 PM EDT (16:22 UTC)
Expired: Sep 7, 2012, 1:00 PM EDT
In force: 38 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Delaware County, IN, Howard County, IN, Madison County, IN, Tipton County, IN

The radar

The Indianapolis radar (KIND), 88 km from the middle of the area, began a volume at 16:26 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
Sep 7, 12:39 PM EDT	HAIL 0.15	Tipton, IN
Sep 7, 12:41 PM EDT	HAIL 0.25	Tipton, IN
Sep 7, 12:55 PM EDT	TSTM WND DMG	Summitville, IN	POWER OUT IN SUMMITVILLE.

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
Sep 7, 11:36 AM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.4 hours before the alert went out and 197 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: 1535 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 930 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 113 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

478 
WUUS53 KIND 071622
SVRIND
INC035-067-095-159-071700-
/O.NEW.KIND.SV.W.0231.120907T1622Z-120907T1700Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1222 PM EDT FRI SEP 7 2012

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN DELAWARE COUNTY IN EAST CENTRAL INDIANA...
  EASTERN HOWARD COUNTY IN CENTRAL INDIANA...
  NORTHERN MADISON COUNTY IN CENTRAL INDIANA...
  TIPTON COUNTY IN CENTRAL INDIANA...

* UNTIL 100 PM EDT

* AT 1221 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 6 MILES SOUTHWEST OF SWAYZEE...
  OR 13 MILES WEST OF FAIRMOUNT...AND MOVING EAST AT 40 MPH. PENNY
  SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

* LOCATIONS IMPACTED INCLUDE...
  ELWOOD...
  ALEXANDRIA...
  ORESTES...
  SUMMITVILLE...
  GASTON...
  EATON...
  ALBANY...

THIS INCLUDES INTERSTATE 69 BETWEEN MILE MARKERS 41 AND 51.

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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4038 8585 4038 8522 4019 8522 4025 8623
      4057 8597 4056 8586
TIME...MOT...LOC 1622Z 283DEG 35KT 4044 8587
WIND...HAIL 60MPH 0.75IN

$$

KOCH

2 follow-up statements

907 
WWUS53 KIND 071642
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1242 PM EDT FRI SEP 7 2012

INC035-067-095-159-071700-
/O.CON.KIND.SV.W.0231.000000T0000Z-120907T1700Z/
DELAWARE-HOWARD-MADISON-TIPTON-
1242 PM EDT FRI SEP 7 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHERN
DELAWARE...SOUTHEASTERN HOWARD...NORTHERN MADISON AND EASTERN TIPTON
COUNTIES UNTIL 100 PM EDT...

AT 1239 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH.  THIS STORM WAS LOCATED 6 MILES SOUTHWEST OF FAIRMOUNT...
MOVING EAST AT 40 MPH. PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE
DAMAGING WINDS.

LOCATIONS IMPACTED INCLUDE...
  ALEXANDRIA...SUMMITVILLE...GASTON...EATON AND ALBANY.

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.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

LAT...LON 4051 8586 4056 8586 4038 8585 4038 8522
      4019 8522 4024 8607
TIME...MOT...LOC 1642Z 283DEG 35KT 4035 8569
WIND...HAIL 60MPH 0.75IN

$$

KOCH

940 
WWUS53 KIND 071701
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
101 PM EDT FRI SEP 7 2012

INC035-067-095-159-071712-
/O.EXP.KIND.SV.W.0231.000000T0000Z-120907T1700Z/
DELAWARE-HOWARD-MADISON-TIPTON-
101 PM EDT FRI SEP 7 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN DELAWARE...
SOUTHEASTERN HOWARD...NORTHERN MADISON AND EASTERN TIPTON COUNTIES
HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.

LAT...LON 4051 8586 4056 8586 4038 8585 4038 8522
      4019 8522 4024 8607
TIME...MOT...LOC 1642Z 283DEG 35KT 4035 8569

$$

KOCH

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 11:42 AM EDT	Special Weather Statement	IND	Howard	48 min
Sep 7, 12:06 PM EDT	Special Weather Statement	IND	Tipton	39 min
Sep 7, 12:52 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Hamilton, Henry, Madison	53 min
Sep 7, 1:12 PM EDT	Severe Thunderstorm Warning	IND	Delaware, Henry, Madison, Randolph	48 min
Sep 7, 1:38 PM EDT	Severe Thunderstorm Warning	IND	Hancock, Henry, Madison	52 min
Sep 7, 3:49 PM EDT	Severe Thunderstorm Warning	IND	Fountain, Parke, Vermillion	41 min
Sep 7, 4:48 PM EDT	Severe Thunderstorm Warning	IND	Parke, Putnam	24 min
Sep 7, 7:18 PM EDT	Tornado Warning	IND	Boone, Clinton, Montgomery, Tippecanoe	42 min
Sep 7, 7:40 PM EDT	Severe Thunderstorm Warning	IND	Clay, Sullivan, Vigo	35 min
Sep 7, 7:59 PM EDT	Tornado Warning	IND	Hendricks, Montgomery, Putnam	46 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.