Alert archive / Indiana / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 49, NWS Northern Indiana

May 18, 2017Kosciusko County, Wabash County, Whitley County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at May 18, 2017, 6:00 PM EDT for Kosciusko County, Wabash County, Whitley County, Indiana. It was in force for 45 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: May 18, 2017, 6:00 PM EDT (22:00 UTC)
Expired: May 18, 2017, 6:45 PM EDT
In force: 45 min
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Kosciusko County, IN, Wabash County, IN, Whitley County, IN

The radar

The Northern Indiana radar (KIWX), 35 km from the middle of the area, began a volume at 21:59 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
May 18, 6:00 PM EDT	TSTM WND DMG	1 Ese Beaver Dam Lake, IN	REPORTS OF A TREE DOWN ON S 675 W BETWEEN BEAVER DAM AND SILVER LAKE, IN.

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.0 hours before the alert went out and 250 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: 641 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1164 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 303 m²/s²
0-3 km storm-relative helicity: 295 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

As transmitted.

758 
WUUS53 KIWX 182200
SVRIWX
INC085-169-183-182245-
/O.NEW.KIWX.SV.W.0049.170518T2200Z-170518T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
600 PM EDT THU MAY 18 2017

The National Weather Service in Northern Indiana  has issued a

* Severe Thunderstorm Warning for...
  Northern Wabash County in north central Indiana...
  Whitley County in northeastern Indiana...
  Southern Kosciusko County in north central Indiana...

* Until 645 PM EDT

* At 559 PM EDT, a severe thunderstorm was located near Akron, or 9
  miles northwest of North Manchester, moving east at 45 mph.

  HAZARD...60 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Columbia City, North Manchester, Tri-lakes, South Whitley, Akron,
  Pierceton, Claypool, Larwill, Burket, Sidney, Laud, Lorane,
  Collamer, Liberty Mills, Raber, Beaver Dam Lake, Sevastopol, Beaver
  Dam, Luther and Peabody.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4104 8595 4104 8602 4109 8602 4109 8604
      4114 8605 4126 8545 4101 8539 4100 8564
      4099 8564 4096 8594
TIME...MOT...LOC 2159Z 259DEG 38KT 4107 8592 

HAIL...0.75IN
WIND...60MPH
 
$$

NWS

The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 1:57 AM EDT	Special Marine Warning	IWX		2 hr
May 18, 5:00 PM EDT	Severe Thunderstorm Warning	IWX	Allen	30 min
May 18, 6:20 PM EDT	Special Weather Statement	IWX	Fulton	25 min
May 18, 6:31 PM EDT	Special Weather Statement	IWX	White	44 min
May 18, 6:41 PM EDT	Special Weather Statement	IWX	Cass	49 min
May 18, 6:51 PM EDT	Special Weather Statement	IWX	Allen	39 min
May 18, 7:03 PM EDT	Special Weather Statement	IWX	Whitley	42 min
May 18, 7:25 PM EDT	Special Weather Statement	IWX	Cass, Miami, Wabash	50 min
May 18, 7:36 PM EDT	Severe Thunderstorm Warning	IWX	Adams, Allen, Huntington, Wells, Whitley	39 min
May 18, 7:51 PM EDT	Areal Flood Advisory	IWX	Allen, Huntington	3 hr
May 18, 7:56 PM EDT	Special Weather Statement	IWX	Miami, Wabash	49 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2017 Every severe thunderstorm warning in 2017

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.