Alert archive / Indiana / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 13, NWS Northern Indiana

February 28, 2017LaPorte County, Indiana

NWS Northern Indiana issued this severe thunderstorm warning at Feb 28, 2017, 8:15 PM CST for LaPorte County, Indiana. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Feb 28, 2017, 8:15 PM CST (02:15 UTC)
Expired
Feb 28, 2017, 8:45 PM CST
In force
30 min
Issued by
NWS Northern Indiana
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County LaPorte County, IN

The radar

The Northern Indiana radar (KIWX), 83 km from the middle of the area, began a volume at 02:19 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Feb 28, 6:37 PM CSTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 2.3 hours before the alert went out and 230 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2017-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 687 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2017-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 395 square meters per square second.1939587897117136Sfc1 km3 km6 km9 kmRMLM
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
687 J/kg
Mixed-layer CIN
-73 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
72 kt
0-1 km storm-relative helicity
395 m²/s²
0-3 km storm-relative helicity
431 m²/s²
Significant tornado parameter
1.6
Supercell composite
6.7

Open this sounding in Storm Lab

The text

As transmitted.

436 
WUUS53 KIWX 010215
SVRIWX
INC091-010245-
/O.NEW.KIWX.SV.W.0013.170301T0215Z-170301T0245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Northern Indiana
815 PM CST TUE FEB 28 2017

The National Weather Service in Northern Indiana  has issued a

* Severe Thunderstorm Warning for...
  Northern La Porte County in northwestern Indiana...

* Until 845 PM CST

* At 814 PM CST, a severe thunderstorm was located over Westville,
  moving east at 60 mph.

  HAZARD...Quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is expected. 

* Locations impacted include...
  La Porte, Westville, New Carlisle, Kingsbury, Byron, Pinola,
  Pinhook, Haskell, Otis, Fish Lake, Stillwell and Rolling Prarie.

This includes INTERSTATE 80 IN INDIANA between MILE MARKERs 38 and
45.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4160 8693 4171 8652 4165 8653 4165 8649
      4157 8649 4156 8650 4153 8650 4148 8693
TIME...MOT...LOC 0214Z 258DEG 55KT 4152 8691 

HAIL...1.00IN
WIND...<50MPH
 
$$

MARSILI

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 28, 6:32 PM CSTSpecial Marine WarningIWX118 min
Feb 28, 7:06 PM CSTSevere Thunderstorm WarningIWXLaPorte, Saint Joseph54 min
Feb 28, 7:20 PM CSTSpecial Marine WarningIWX85 min
Feb 28, 7:52 PM CSTSevere Thunderstorm WarningIWXElkhart, LaPorte, Saint Joseph53 min
Feb 28, 8:36 PM CSTTornado WarningIWXLaPorte, Saint Joseph39 min
Feb 28, 8:45 PM CSTSevere Thunderstorm WarningIWXElkhart, LaPorte, Saint Joseph45 min
Feb 28, 9:01 PM CSTAreal Flood AdvisoryIWXElkhart, LaPorte, Saint Joseph6 hr
Feb 28, 9:01 PM CSTTornado WarningIWXElkhart, Saint Joseph29 min
Feb 28, 9:09 PM CSTSevere Thunderstorm WarningIWXLaPorte, Saint Joseph39 min
Feb 28, 9:17 PM CSTFlash Flood WarningIWXElkhart, LaPorte, Saint Joseph6 hr
Feb 28, 9:27 PM CSTSpecial Marine WarningIWX93 min
Feb 28, 9:29 PM CSTTornado WarningIWXElkhart, LaGrange31 min
Feb 28, 9:52 PM CSTTornado WarningIWXLaGrange, Steuben23 min
Feb 28, 10:12 PM CSTTornado WarningIWXSteuben31 min
Feb 28, 11:18 PM CSTSpecial Marine WarningIWX87 min
Feb 28, 11:40 PM CSTSevere Thunderstorm WarningIWXLaPorte, Saint Joseph65 min
Feb 28, 11:56 PM CSTSevere Thunderstorm WarningIWXFulton, LaPorte, Marshall, Pulaski, Starke49 min
Mar 1, 12:01 AM CSTSevere Thunderstorm WarningIWXLaPorte, Marshall, Saint Joseph, Starke44 min
Mar 1, 12:22 AM CSTSevere Thunderstorm WarningIWXPulaski, White38 min
Mar 1, 12:30 AM CSTSevere Thunderstorm WarningIWXElkhart, Kosciusko, LaGrange, Marshall, Noble, Saint Joseph45 min
Mar 1, 12:43 AM CSTSevere Thunderstorm WarningIWXFulton, Kosciusko, Marshall, Pulaski, Starke34 min
Mar 1, 1:06 AM CSTSevere Thunderstorm WarningIWXAllen, DeKalb, Kosciusko, LaGrange, Noble, Steuben and 1 more39 min
Mar 1, 1:24 AM CSTSpecial Weather StatementIWXHuntington, Miami, Wabash51 min
Mar 1, 1:29 AM CSTSevere Thunderstorm WarningIWXAllen, DeKalb, Steuben, Whitley61 min
Mar 1, 1:31 AM CSTTornado WarningIWXAllen29 min
Mar 1, 1:59 AM CSTSevere Thunderstorm WarningIWXAdams, Allen, Blackford, Grant, Huntington, Jay and 2 more46 min
Mar 1, 9:54 AM CSTWind AdvisoryIWXAdams, Allen, Blackford, Cass, DeKalb, Grant and 6 more11 hr

Nearby

Severe Thunderstorm Warnings in Indiana, 2017Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.