Alert archive / Indiana / Flash Flood Warnings in 2019

Flash Flood Warning 21, NWS Northern Indiana

September 28, 2019LaPorte County, Indiana

NWS Northern Indiana issued this flash flood warning at Sep 28, 2019, 2:29 AM CDT for LaPorte County, Indiana. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 28, 2019, 2:29 AM CDT (07:29 UTC)
Expired: Sep 28, 2019, 8:30 AM CDT
In force: 6 hr
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Flood severity: None

County LaPorte County, IN

The radar

The Northern Indiana radar (KIWX), 88 km from the middle of the area, began a volume at 07:29 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 nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 7.5 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-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: 1621 J/kg
Mixed-layer CIN: -94 J/kg
Mixed-layer LCL: 1595 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 198 m²/s²
0-3 km storm-relative helicity: 340 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 10.8

Open this sounding in Storm Lab

The text

As transmitted.

921 
WGUS53 KIWX 280729
FFWIWX
INC091-281330-
/O.NEW.KIWX.FF.W.0021.190928T0729Z-190928T1330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Northern Indiana
229 AM CDT Sat Sep 28 2019

The National Weather Service in Northern Indiana has issued a

* Flash Flood Warning for...
  La Porte County in northwestern Indiana...

* Until 830 AM CDT Saturday.

* At 227 AM CDT, Doppler radar indicated up to six inches of rain 
  have already fallen with the heaviest from Westville to LaPorte. 
  Additional rainfall of up to an inch early this morning will only 
  further exacerbate ongoing flash flooding.

* Some locations that will experience flooding include...
  Michigan City, La Porte, Westville, Trail Creek, Kingsford Heights,
  Long Beach, Wanatah, Pottawattamie Park, Hanna, Michiana Shores,
  Kingsbury, Michiana, Waterford, Pinhook, Salem Heights, Fish Lake,
  Otis, Stillwell, Hesston and Haskell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 4171 8693 4173 8691 4174 8692 4178 8680
      4176 8682 4176 8653 4165 8653 4165 8649
      4157 8649 4156 8650 4152 8650 4152 8652
      4148 8653 4137 8693

$$

PBM

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 27, 7:42 PM CDT	Special Weather Statement	IWX	LaPorte, Starke	33 min
Sep 27, 7:45 PM CDT	Special Weather Statement	IWX	Elkhart, LaGrange, Steuben	30 min
Sep 27, 8:12 PM CDT	Flash Flood Warning	IWX	LaPorte	6 hr
Sep 27, 8:35 PM CDT	Areal Flood Advisory	IWX	DeKalb, Elkhart, LaGrange, Marshall, Noble, Saint Joseph and 1 more	4 hr
Sep 27, 8:47 PM CDT	Special Weather Statement	IWX	LaPorte, Saint Joseph	43 min
Sep 27, 9:09 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, Saint Joseph	51 min
Sep 27, 9:29 PM CDT	Flash Flood Warning	IWX	Saint Joseph	6 hr
Sep 27, 9:40 PM CDT	Severe Thunderstorm Warning	IWX	Elkhart, Kosciusko, LaGrange, Noble	50 min
Sep 27, 9:51 PM CDT	Special Weather Statement	IWX	LaGrange	39 min
Sep 27, 10:05 PM CDT	Severe Thunderstorm Warning	IWX	LaGrange, Steuben	40 min
Sep 27, 10:54 PM CDT	Areal Flood Advisory	IWX	DeKalb, Elkhart, Kosciusko, LaGrange, Marshall, Noble and 3 more	6 hr
Sep 27, 11:02 PM CDT	Flash Flood Warning	IWX	Elkhart, Kosciusko, LaGrange, Noble, Whitley	6 hr
Sep 28, 3:08 AM CDT	Beach Hazards Statement	IWX		19 hr

Nearby

Flash Flood Warnings in Indiana, 2019 Every flash flood warning in 2019

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.