Alert archive / Indiana / Flash Flood Warnings in 2018

Flash Flood Warning 8, NWS Northern Indiana

August 6, 2018White County, Indiana

NWS Northern Indiana issued this flash flood warning at Aug 6, 2018, 9:53 PM EDT for White County, Indiana. It was in force for 2 hr. 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: Aug 6, 2018, 9:53 PM EDT (01:53 UTC)
Expired: Aug 7, 2018, 12:00 AM EDT
In force: 2 hr
Issued by: NWS Northern Indiana
Area: Storm-based polygon
Flood severity: None

County White County, IN

The radar

The Northern Indiana radar (KIWX), 117 km from the middle of the area, began a volume at 01:57 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
Aug 6, 10:30 PM EDT	HEAVY RAIN 2.45	Brookston, IN

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

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.9 hours before the alert went out and 164 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: 3036 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 1284 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 11.4

Open this sounding in Storm Lab

The text

As transmitted.

509 
WGUS53 KIWX 070153
FFWIWX
INC181-070545-
/O.NEW.KIWX.FF.W.0008.180807T0153Z-180807T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Northern Indiana
953 PM EDT MON AUG 6 2018

The National Weather Service in Northern Indiana  has issued a

* Flash Flood Warning for...
  White County in northwestern Indiana...

* Until 145 AM EDT.

* At 952 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Radar estimates that between 2 
  and 3 inches of rain has fallen across the warning area. 
  Additional heavy rainfall is expected through 1100 PM EDT. Flash 
  flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Monticello, Brookston, Wolcott, Reynolds, Chalmers, Burnettsville,
  Badger Grove, Smithson, Golden Hill, Indiana Beach, Norway,
  Idaville, Sitka and Cedar Point.

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 4082 8710 4083 8658 4074 8658 4074 8675
      4073 8676 4072 8675 4070 8676 4069 8675
      4068 8676 4068 8674 4066 8678 4056 8677
      4057 8710

$$

MARSILI

1 follow-up statement

632 
WGUS73 KIWX 070400
FFSIWX

Flash Flood Statement
National Weather Service Northern Indiana
1200 AM EDT TUE AUG 7 2018

INC181-070409-
/O.CAN.KIWX.FF.W.0008.000000T0000Z-180807T0545Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
White IN-
1200 AM EDT TUE AUG 7 2018

...THE FLASH FLOOD WARNING FOR WHITE COUNTY IS CANCELLED...

The heavy rain has ended. While some ponding of water is likely on 
roadways through 200 AM EDT, the threat of flash flooding has 
diminished. Therefore, the flash flood warning has been cancelled.

LAT...LON 4082 8710 4083 8658 4074 8658 4074 8675
      4073 8676 4072 8675 4070 8676 4069 8675
      4068 8676 4068 8674 4066 8678 4056 8677
      4057 8710

$$

MARSILI

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 8:06 PM EDT	Special Weather Statement	IWX	Cass, White	39 min
Aug 6, 8:13 PM EDT	Areal Flood Advisory	IWX	Elkhart, Saint Joseph	3 hr
Aug 6, 8:52 PM EDT	Special Weather Statement	IWX	Steuben	38 min
Aug 6, 8:57 PM EDT	Special Weather Statement	IWX	Whitley	33 min
Aug 6, 9:05 PM EDT	Severe Thunderstorm Warning	IWX	Allen, DeKalb, Noble, Whitley	40 min
Aug 6, 9:40 PM EDT	Areal Flood Advisory	IWX	Steuben	3 hr
Aug 6, 11:47 PM EDT	Special Weather Statement	IWX	Jay	43 min
Aug 7, 3:54 PM EDT	Areal Flood Advisory	IWX	LaPorte, Saint Joseph	3 hr
Aug 7, 4:39 PM EDT	Special Weather Statement	IWX	Elkhart	36 min
Aug 7, 4:50 PM EDT	Special Weather Statement	IWX	Steuben	40 min
Aug 7, 4:52 PM EDT	Tornado Warning	IWX	Steuben	38 min

Nearby

Flash Flood Warnings in Indiana, 2018 Every flash flood warning in 2018

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.