Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 185, NWS Indianapolis, IN

July 31, 2012Daviess County, Indiana

NWS Indianapolis, IN issued this severe thunderstorm warning at Jul 31, 2012, 5:50 PM EDT for Daviess County, Indiana. It was in force for 25 min. 4 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: Jul 31, 2012, 5:50 PM EDT (21:50 UTC)
Expired: Jul 31, 2012, 6:15 PM EDT
In force: 25 min
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Daviess County, IN

The radar

The Evansville,IN radar (KVWX), 74 km from the middle of the area, began a volume at 21:49 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, 6:11 PM EDT	HAIL 0.75	Washington, IN	REPORT FROM WEATHER SPOTTER FOR TV STATION...RELAYED BY THE TV STATION
Jul 31, 6:12 PM EDT	TSTM WND GST 70	Washington, IN
Jul 31, 6:12 PM EDT	HAIL 0.5	Washington, IN
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, 9.8 hours before the alert went out and 205 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.

720 
WUUS53 KIND 312150
SVRIND
INC027-312215-
/O.NEW.KIND.SV.W.0185.120731T2150Z-120731T2215Z/

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

THE NATIONAL WEATHER SERVICE IN INDIANAPOLIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  DAVIESS COUNTY IN SOUTHWEST INDIANA...

* UNTIL 615 PM EDT

* AT 546 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED 14 MILES SOUTH OF LINTON...OR 26 MILES NORTHEAST
  OF VINCENNES...AND MOVING SOUTH AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  WASHINGTON...
  PLAINVILLE...
  MONTGOMERY...
  CANNELBURG...
  GLENDALE FISHERY...
  ALFORDSVILLE...

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 3851 8707 3853 8710 3851 8715 3854 8718
      3855 8721 3884 8716 3884 8714 3887 8715
      3886 8713 3887 8714 3888 8712 3889 8713
      3890 8710 3891 8696 3866 8692 3850 8692
TIME...MOT...LOC 2150Z 351DEG 23KT 3882 8708
WIND...HAIL <50MPH 1.00IN

$$

HOMANN/DWM

1 follow-up statement

038 
WWUS53 KIND 312159
SVSIND

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

INC027-312215-
/O.CON.KIND.SV.W.0185.000000T0000Z-120731T2215Z/
DAVIESS-
559 PM EDT TUE JUL 31 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR DAVIESS COUNTY
UNTIL 615 PM EDT...

AT 555 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
STORM WAS LOCATED 7 MILES NORTHEAST OF WASHINGTON...OR 19 MILES
NORTHEAST OF PETERSBURG...MOVING SOUTH AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  ALFORDSVILLE AND 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 3851 8707 3853 8710 3852 8712 3853 8713
      3851 8715 3854 8718 3855 8721 3884 8716
      3884 8695 3867 8692 3850 8692
TIME...MOT...LOC 2200Z 355DEG 46KT 3866 8708
WIND...HAIL <50MPH 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, 6:13 PM EDT	Severe Thunderstorm Warning	IND	Daviess, Knox	32 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.