Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 112, NWS Northern Indiana

August 9, 2012White County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Aug 9, 2012, 8:25 PM EDT for White County, Indiana. It was in force for 50 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: Aug 9, 2012, 8:25 PM EDT (00:25 UTC)
Expired: Aug 9, 2012, 9:15 PM EDT
In force: 50 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County White County, IN

The radar

The Indianapolis radar (KIND), 126 km from the middle of the area, began a volume at 00:28 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
Aug 9, 8:38 PM EDT	HAIL 1	Wolcott, 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
Aug 9, 5:02 PM EDT	Severe Thunderstorm Watch	SPC	4 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.4 hours before the alert went out and 150 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: 680 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1397 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 0 m²/s²
0-3 km storm-relative helicity: 33 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.

395 
WUUS53 KIWX 100025
SVRIWX
INC181-100115-
/O.NEW.KIWX.SV.W.0112.120810T0025Z-120810T0115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
825 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN WHITE COUNTY IN NORTHWEST INDIANA...

* UNTIL 915 PM EDT/815 PM CDT/

* AT 821 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 SEVERE STORM WAS LOCATED
  8 MILES WEST OF WOLCOTT...OR 10 MILES SOUTH OF RENSSELAER...AND
  MOVING SOUTHEAST AT 30 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  WOLCOTT...
  BROOKSTON...

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
SMITHSON...BADGER GROVE AND CHALMERS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SEVERE THUNDERSTORM. IF YOU ARE IN THE 
PATH...PREPARE IMMEDIATELY FOR QUARTER SIZE HAIL...AND DAMAGING 
WINDS IN EXCESS OF 60 MPH...ALONG WITH DEADLY CLOUD TO GROUND 
LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...PREFERABLY 
INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

DOPPLER RADAR WAS ALSO DETECTING ROTATION WITH THIS STORM. TORNADOES 
CAN DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT 
IMMEDIATELY LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO 
A PLACE OF SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR 
SMALL INTERIOR ROOM.

TO REPORT SEVERE WEATHER...POST YOUR INFORMATION ON THE NATIONAL
WEATHER SERVICE NORTHERN INDIANA FACEBOOK PAGE...OR YOU CAN POST ON
TWITTER WITH THE HANDLE... @ N W S I W X. REPORTS CAN ALSO BE MADE TO
THE NATIONAL PUBLIC OBSERVATION REPORTING HOTLINE TOLL FREE AT
877-633-6772.

&&

LAT...LON 4085 8710 4085 8708 4067 8677 4058 8677
      4057 8678 4057 8708 4059 8711 4084 8711
TIME...MOT...LOC 0024Z 310DEG 27KT 4077 8717
WIND...HAIL 60MPH 1.00IN

$$

The office that day

Everything else NWS Northern Indiana issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 8:31 PM EDT	Special Weather Statement	IWX	Whitley	29 min
Aug 9, 8:36 PM EDT	Tornado Warning	IWX	White	39 min
Aug 9, 8:48 PM EDT	Special Weather Statement	IWX	Wabash	27 min
Aug 9, 9:05 PM EDT	Severe Thunderstorm Warning	IWX	Cass, Miami	40 min
Aug 9, 9:11 PM EDT	Special Weather Statement	IWX	Allen	34 min
Aug 9, 9:23 PM EDT	Special Weather Statement	IWX	Wabash	37 min
Aug 9, 9:29 PM EDT	Severe Thunderstorm Warning	IWX	Huntington, Wabash	46 min
Aug 9, 10:29 PM EDT	Special Weather Statement	IWX	Adams, Wells	46 min
Aug 9, 10:49 PM EDT	Severe Thunderstorm Warning	IWX	Adams, Jay, Wells	23 min
Aug 10, 4:35 AM EDT	Gale Warning	IWX		17 hr

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.