Alert archive / Indiana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 21, NWS Chicago, IL

May 11, 2014Porter County, Indiana

NWS Chicago, IL issued this severe thunderstorm warning at May 11, 2014, 7:03 PM CDT for Porter County, Indiana. It was in force for 42 min. 2 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: May 11, 2014, 7:03 PM CDT (00:03 UTC)
Expired: May 11, 2014, 7:45 PM CDT
In force: 42 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 70.0 mph

County Porter County, IN

The radar

The Chicago radar (KLOT), 92 km from the middle of the area, began a volume at 00:05 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 11, 7:10 PM CDT	TSTM WND GST 70	Chesterton, IN	TRANSFORMER BLEW.
May 11, 7:15 PM CDT	TSTM WND DMG	4 Ne Burns Harbor, IN	AT INDIANA DUNES STATE PARK. DOWNED TREE.

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
May 11, 3:05 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.1 hours before the alert went out and 207 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: 2685 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 968 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 154 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 7.1

Open this sounding in Storm Lab

The text

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

901 
WUUS53 KLOT 120003
SVRLOT
INC127-120045-
/O.NEW.KLOT.SV.W.0021.140512T0003Z-140512T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
703 PM CDT SUN MAY 11 2014

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  PORTER COUNTY IN NORTHWEST INDIANA...

* UNTIL 745 PM CDT

* AT 656 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED NEAR WHEELER...
  AND MOVING EAST AT 45 MPH.

  HAZARD...70 MPH WIND GUSTS AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...HAIL DAMAGE TO VEHICLES IS EXPECTED. EXPECT CONSIDERABLE
           TREE DAMAGE. WIND DAMAGE IS ALSO LIKELY TO MOBILE HOMES...
           ROOFS AND OUTBUILDINGS.

* LOCATIONS IMPACTED INCLUDE...
  LINCOLN HILLS...PORTER...CHESTERTON...VALPARAISO...MALDEN...BEVERLY
  SHORES AND TOWN OF PINES.

OTHER LOCATIONS AFFECTED...
INDIANA DUNES STATE PARK...PORTER COUNTY FAIRGROUNDS...VALPARAISO
UNIVERSITY...


PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4171 8693 4155 8692 4133 8693 4136 8715
      4167 8707 4170 8697 4172 8694 4171 8693
      4173 8691 4172 8690
TIME...MOT...LOC 0002Z 272DEG 37KT 4154 8712

HAIL...1.00IN
WIND...70MPH

$$

BMD

1 follow-up statement

400 
WWUS53 KLOT 120046
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
746 PM CDT SUN MAY 11 2014

INC127-120056-
/O.EXP.KLOT.SV.W.0021.000000T0000Z-140512T0045Z/
PORTER IN-
746 PM CDT SUN MAY 11 2014


...THE SEVERE THUNDERSTORM WARNING FOR PORTER COUNTY HAS EXPIRED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.  HOWEVER...GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH
THIS THUNDERSTORM.

IN ADDITION...STRONG THUNDERSTORMS MAY REDEVELOP...AND A SEVERE
THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT.

LAT...LON 4171 8693 4155 8692 4133 8693 4136 8715
      4167 8707 4170 8697 4172 8694 4171 8693
      4173 8691 4172 8690
TIME...MOT...LOC 0003Z 272DEG 37KT 4154 8711


$$

BMD

The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 11, 7:39 PM CDT	Flash Flood Warning	LOT	Jasper, Lake, Newton, Porter	6 hr
May 11, 7:43 PM CDT	Severe Thunderstorm Warning	LOT	Jasper, Newton	62 min
May 11, 7:54 PM CDT	Tornado Warning	LOT	Jasper, Newton	51 min
May 11, 9:15 PM CDT	Flash Flood Warning	LOT	Benton, Jasper, Newton	6 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2014 Every severe thunderstorm warning in 2014

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.