Alert archive / Indiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 69, NWS Northern Indiana

July 6, 2012LaGrange County, Indiana; Saint Joseph County, Michigan

NWS Northern Indiana issued this severe thunderstorm warning at Jul 6, 2012, 6:43 PM EDT for LaGrange County, Indiana; Saint Joseph County, Michigan. It was in force for 32 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: Jul 6, 2012, 6:43 PM EDT (22:43 UTC)
Expired: Jul 6, 2012, 7:15 PM EDT
In force: 32 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

Counties LaGrange County, IN, Saint Joseph County, MI

The radar

The Northern Indiana radar (KIWX), 51 km from the middle of the area, began a volume at 22:44 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 6, 6:44 PM EDT	TSTM WND DMG	2 Wsw Ontario, IN	DOWNBURST WINDS CAUSED EXTENSIVE DAMAGE TO A 1 SQUARE MILE AREA ALONG AND TO THE SOUTHEAST OF SR9 AND CR 400N. MULTIPLE TREE LIMBS WERE REPORTED DOWN...POWER LINES WERE REPORTED DOWN...AND A SMALL FISHING BOAT WAS BLOWN OFF ITS TRAILER.
Jul 6, 6:44 PM EDT	TSTM WND DMG	4 N Lagrange, IN	REPORT OF A METAL SHED BLOWN OVER.
Jul 6, 6:55 PM EDT	HAIL 0.75	Lagrange, IN	LASTED FOR 2 MINUTES.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 10.7 hours before the alert went out and 193 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: 1645 J/kg
Mixed-layer CIN: -132 J/kg
Mixed-layer LCL: 1339 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: -21 m²/s²
0-3 km storm-relative helicity: -96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

750 
WUUS53 KIWX 062243
SVRIWX
INC087-MIC149-062315-
/O.NEW.KIWX.SV.W.0069.120706T2243Z-120706T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE NORTHERN INDIANA
643 PM EDT FRI JUL 6 2012

THE NATIONAL WEATHER SERVICE IN NORTHERN INDIANA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ST. JOSEPH COUNTY IN SOUTHWEST MICHIGAN...
  CENTRAL LAGRANGE COUNTY IN NORTHEAST INDIANA...

* UNTIL 715 PM EDT

* AT 640 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.  THIS SEVERE STORM WAS   
LOCATED 4 MILES NORTH OF LAGRANGE...AND MOVING NORTH AT 5 MPH.

* LOCATIONS IN THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...
  STURGIS...

OTHER LOCATIONS IMPACTED BY THIS SEVERE THUNDERSTORM INCLUDE
ONTARIO...FAWN RIVER AND BRIGHTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4178 8529 4176 8530 4176 8528 4160 8534
      4165 8550 4177 8552 4184 8543
TIME...MOT...LOC 2243Z 215DEG 5KT 4170 8540
WIND...HAIL 70MPH 1.00IN

$$

2 follow-up statements

528 
WWUS53 KIWX 062301
SVSIWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
701 PM EDT FRI JUL 6 2012

INC087-MIC149-062315-
/O.CON.KIWX.SV.W.0069.000000T0000Z-120706T2315Z/
LAGRANGE IN-ST. JOSEPH MI-
701 PM EDT FRI JUL 6 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR SOUTHEASTERN ST. JOSEPH AND CENTRAL LAGRANGE COUNTIES...

AT 658 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS SEVERE STORM 
WAS LOCATED 5 MILES NORTH OF LAGRANGE...AND WAS NEARLY STATIONARY.

LOCATIONS IMPACTED INCLUDE...
  STURGIS...BRIGHTON AND FAWN RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4178 8529 4176 8530 4176 8528 4160 8534
      4165 8550 4177 8552 4184 8543
TIME...MOT...LOC 2300Z 215DEG 5KT 4172 8538
WIND...HAIL 70MPH 1.00IN

$$

391 
WWUS53 KIWX 062315
SVSIWX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORTHERN INDIANA
715 PM EDT FRI JUL 6 2012

INC087-MIC149-062325-
/O.EXP.KIWX.SV.W.0069.000000T0000Z-120706T2315Z/
LAGRANGE IN-ST. JOSEPH MI-
715 PM EDT FRI JUL 6 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN ST. JOSEPH AND
CENTRAL LAGRANGE COUNTIES HAS EXPIRED...

AT 712 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAD WEAKENED TO 
BELOW SEVERE LIMITS. THEREFORE...THE SEVERE THUNDERSTORM WARNING HAS BEEN 
ALLOWED TO EXPIRE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4178 8529 4176 8530 4176 8528 4160 8534
      4165 8550 4177 8552 4184 8543
TIME...MOT...LOC 2315Z 215DEG 5KT 4174 8536

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 5, 8:21 PM EDT	Special Weather Statement	IWX	Adams	24 min
Jul 6, 3:18 PM EDT	Special Weather Statement	IWX	Allen, Kosciusko, Whitley	27 min
Jul 6, 4:04 PM EDT	Severe Thunderstorm Warning	IWX	Huntington, Wabash	26 min
Jul 6, 4:19 PM EDT	Severe Thunderstorm Warning	IWX	Huntington, Wabash	14 min
Jul 6, 4:28 PM EDT	Severe Thunderstorm Warning	IWX	Huntington	24 min
Jul 6, 4:45 PM EDT	Areal Flood Advisory	IWX	Huntington	3 hr
Jul 6, 4:58 PM EDT	Special Weather Statement	IWX	Miami	47 min
Jul 6, 5:59 PM EDT	Special Weather Statement	IWX	LaGrange	31 min
Jul 6, 6:04 PM EDT	Special Weather Statement	IWX	Blackford	26 min
Jul 6, 6:11 PM EDT	Severe Thunderstorm Warning	IWX	Blackford, Jay	25 min
Jul 6, 6:18 PM EDT	Severe Thunderstorm Warning	IWX	LaGrange	27 min
Jul 6, 7:13 PM EDT	Areal Flood Advisory	IWX	LaGrange	2 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2012 Severe Thunderstorm Warnings in Michigan, 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.