Alert archive / Indiana / Flash Flood Warnings in 2018

Flash Flood Warning 10, NWS Indianapolis, IN

June 11, 2018Knox County, Indiana

NWS Indianapolis, IN issued this flash flood warning at Jun 11, 2018, 11:15 PM EDT for Knox County, Indiana. It was in force for 9 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: Jun 11, 2018, 11:15 PM EDT (03:15 UTC)
Expired: Jun 12, 2018, 8:15 AM EDT
In force: 9 hr
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Flood severity: None

County Knox County, IN

The radar

The Evansville,IN radar (KVWX), 29 km from the middle of the area, began a volume at 03:16 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
Jun 11, 11:30 PM EDT	FLASH FLOOD	4 N Decker, IN	WATER OVER SOME ROADS APPROXIMATELY 7 MILES SOUTH OF VINCENNES.

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, 3.3 hours before the alert went out and 201 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: 431 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 850 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 260 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

050 
WGUS53 KIND 120315
FFWIND
INC083-120615-
/O.NEW.KIND.FF.W.0010.180612T0315Z-180612T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
1115 PM EDT MON JUN 11 2018

The National Weather Service in Indianapolis has issued a

* Flash Flood Warning for...
  Southwestern Knox County in southwestern Indiana...

* Until 215 AM EDT.

* At 1115 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Around two inches of rain have 
  already fallen. Flash flooding is expected to begin shortly.

* Some locations that will experience flooding include...
  Decker.

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 3845 8773 3846 8776 3848 8775 3851 8765
      3855 8767 3859 8764 3859 8761 3861 8763
      3864 8762 3864 8748 3851 8748 3850 8753
      3852 8754 3849 8754 3850 8759 3845 8760
      3844 8763 3846 8766 3843 8767 3841 8774

$$

50

1 follow-up statement

426 
WGUS53 KIND 120610
FFWIND
INC083-121215-
/O.EXT.KIND.FF.W.0010.000000T0000Z-180612T1215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
210 AM EDT TUE JUN 12 2018

The National Weather Service in Indianapolis has extended the

* Flash Flood Warning for...
  Southwestern Knox County in southwestern Indiana...

* Until 815 AM EDT Tuesday.

* At 209 AM EDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to three inches of rain have 
  already fallen. Flash flooding is already occurring. Additional 
  thunderstorms are likely to move into the warned area later 
  tonight.

* Some locations that will experience flooding include...
  Decker.

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 3845 8773 3846 8776 3848 8775 3851 8765
      3855 8767 3859 8764 3859 8761 3861 8763
      3864 8762 3864 8748 3851 8748 3850 8753
      3852 8754 3849 8754 3850 8759 3845 8760
      3844 8763 3846 8766 3843 8767 3841 8774

$$

NIELD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 11, 8:58 PM EDT	Severe Thunderstorm Warning	IND	Knox, Sullivan	32 min
Jun 11, 9:31 PM EDT	Flash Flood Watch	IND	Brown, Clay, Daviess, Greene, Jackson, Knox and 8 more	16 hr
Jun 11, 10:42 PM EDT	Areal Flood Warning	IND	Knox	3 hr
Jun 11, 10:58 PM EDT	Special Weather Statement	IND	Greene	32 min
Jun 12, 7:47 AM EDT	Flash Flood Warning	IND	Knox	6 hr
Jun 12, 3:45 PM EDT	Flash Flood Watch	IND	Daviess, Greene, Jackson, Jennings, Knox, Lawrence and 2 more	10 hr

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.