Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 186, NWS Indianapolis, IN

July 31, 2012Daviess County, Knox County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 31, 2012, 6:13 PM EDT for Daviess County, Knox County, Indiana. It was in force for 32 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: Jul 31, 2012, 6:13 PM EDT (22:13 UTC)
Expired: Jul 31, 2012, 6:45 PM EDT
In force: 32 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Daviess County, IN, Knox County, IN

The radar

The Evansville,IN radar (KVWX), 58 km from the middle of the area, began a volume at 22:12 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
Jul 31, 6:14 PM EDT	HAIL 1	Washington, 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
Jul 31, 2:13 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 10.2 hours before the alert went out and 217 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: 2241 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 958 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.9

Open this sounding in Storm Lab

The text

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

762 
WUUS53 KIND 312213
SVRIND
INC027-083-312245-
/O.NEW.KIND.SV.W.0186.120731T2213Z-120731T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
613 PM EDT TUE JUL 31 2012

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN DAVIESS COUNTY IN SOUTHWEST INDIANA...
  SOUTHEASTERN KNOX COUNTY IN SOUTHWEST INDIANA...

* UNTIL 645 PM EDT

* AT 609 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
  WASHINGTON...OR 12 MILES NORTHEAST OF PETERSBURG...AND MOVING SOUTH
  AT 30 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GLENDALE FISHERY...

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 3853 8710 3853 8713 3851 8715 3855 8719
      3853 8722 3854 8725 3852 8726 3850 8730
      3852 8732 3871 8719 3870 8703 3851 8704
      3850 8706
TIME...MOT...LOC 2213Z 014DEG 24KT 3862 8717
WIND...HAIL 60MPH 1.00IN

$$

HOMANN/DWM

1 follow-up statement

559 
WWUS53 KIND 312221
SVSIND

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
621 PM EDT TUE JUL 31 2012

INC027-083-312245-
/O.CON.KIND.SV.W.0186.000000T0000Z-120731T2245Z/
DAVIESS-KNOX-
621 PM EDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHWESTERN
DAVIESS AND SOUTHEASTERN KNOX COUNTIES UNTIL 645 PM EDT...

AT 618 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
WASHINGTON...OR 9 MILES NORTHEAST OF PETERSBURG...MOVING SOUTH AT 25
MPH.

LOCATIONS IMPACTED INCLUDE...
  GLENDALE FISHERY.

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 3853 8710 3853 8713 3851 8715 3855 8719
      3853 8722 3854 8725 3852 8726 3850 8730
      3852 8732 3871 8719 3870 8703 3851 8704
      3850 8706
TIME...MOT...LOC 2221Z 013DEG 23KT 3858 8717
WIND...HAIL 60MPH 1.00IN

$$

HOMANN/DWM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 4:19 PM EDT	Special Weather Statement	IND	Tippecanoe	26 min
Jul 31, 4:23 PM EDT	Special Weather Statement	IND	Clay, Greene, Owen	52 min
Jul 31, 4:35 PM EDT	Severe Thunderstorm Warning	IND	Daviess, Greene, Lawrence, Martin, Monroe, Owen	40 min
Jul 31, 4:56 PM EDT	Special Weather Statement	IND	Hamilton, Marion	49 min
Jul 31, 5:14 PM EDT	Severe Thunderstorm Warning	IND	Daviess, Greene, Martin	31 min
Jul 31, 5:50 PM EDT	Severe Thunderstorm Warning	IND	Daviess	25 min
Jul 31, 6:45 PM EDT	Severe Thunderstorm Warning	IND	Daviess, Knox	16 min
Jul 31, 7:10 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Brown, Johnson, Shelby	50 min
Jul 31, 7:34 PM EDT	Severe Thunderstorm Warning	IND	Bartholomew, Decatur	41 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.