Alert archive / Indiana / Flash Flood Warnings in 2017

Flash Flood Warning 4, NWS Indianapolis, IN

May 20, 2017Howard County, Indiana

NWS Indianapolis, IN issued this flash flood warning at May 20, 2017, 10:25 PM EDT for Howard County, Indiana. It was in force for 5 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: May 20, 2017, 10:25 PM EDT (02:25 UTC)
Expired: May 21, 2017, 3:30 AM EDT
In force: 5 hr
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Flood severity: None

County Howard County, IN

The radar

The Indianapolis radar (KIND), 88 km from the middle of the area, began a volume at 02:27 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 20, 10:30 PM EDT	FLASH FLOOD	1 Se Kokomo, IN	VIA KOKOMO 911 SCANNER, REPORT OF MULTIPLE ACCIDENTS AND CARS STUCK IN WATER.

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 00:00Z, 2.4 hours before the alert went out and 221 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: 919 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 952 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 85 m²/s²
0-3 km storm-relative helicity: 162 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

218 
WGUS53 KIND 210225
FFWIND
INC067-210730-
/O.NEW.KIND.FF.W.0004.170521T0225Z-170521T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
1025 PM EDT SAT MAY 20 2017

The National Weather Service in Indianapolis has issued a

* Flash Flood Warning for...
  Howard County in central Indiana...

* Until 330 AM EDT

* At 1025 PM EDT, trained weather spotters reported heavy rain across
  the warned area. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Kokomo, Greentown and Indian Heights. 

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 4041 8587 4040 8623 4056 8622 4056 8587

$$

PUMA

The office that day

Everything else NWS Indianapolis, IN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 20, 8:34 PM EDT	Tornado Warning Tornado observed	IND	Clinton, Howard	26 min
May 20, 9:02 PM EDT	Tornado Warning	IND	Howard	28 min
May 20, 11:09 PM EDT	River Flood Warning	IND	Tippecanoe	61 hr
May 21, 11:10 AM EDT	River Flood Warning	IND	Clinton, Tippecanoe	24 hr

Nearby

Flash Flood Warnings in Indiana, 2017 Every flash flood 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.