Alert archive / Indiana / Flash Flood Warnings in 2021

Flash Flood Warning 20, NWS Indianapolis, IN

July 1, 2021Fountain County, Montgomery County, Indiana

NWS Indianapolis, IN issued this flash flood warning at Jul 1, 2021, 2:24 AM EDT for Fountain County, Montgomery County, Indiana. It was in force for 3 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: Jul 1, 2021, 2:24 AM EDT (06:24 UTC)
Expired: Jul 1, 2021, 5:30 AM EDT
In force: 3 hr
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Flood severity: None

Counties Fountain County, IN, Montgomery County, IN

The radar

The Indianapolis radar (KIND), 75 km from the middle of the area, began a volume at 06:24 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
Jul 1, 4:00 AM EDT	FLASH FLOOD	2 N Yeddo, IN	HEAVY RAINS WASHED OUT A SECTION OF STATE ROAD 32 IN EASTERN FOUNTAIN COUNTY.

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, 6.4 hours before the alert went out and 131 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: 573 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 892 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted.

431 
WGUS53 KIND 010624
FFWIND
INC045-107-010930-
/O.NEW.KIND.FF.W.0020.210701T0624Z-210701T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
224 AM EDT Thu Jul 1 2021

The National Weather Service in Indianapolis has issued a

* Flash Flood Warning for...
  Southeastern Fountain County in west central Indiana...
  Montgomery County in west central Indiana...

* Until 530 AM EDT.

* At 224 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2.5 inches of 
  rain have fallen. Additional rainfall amounts of 1 to 2 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Crawfordsville, Veedersburg, Ladoga, Waynetown, Darlington, New 
  Market, Hillsboro, Kingman, New Ross, Wallace, Alamo, Shades State 
  Park and Yeddo.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3996 8732 4011 8733 4013 8670 3987 8670
      3993 8709 3995 8709

FLASH FLOOD...RADAR INDICATED

$$

Ryan

2 follow-up statements

777 
WGUS73 KIND 010736
FFSIND

Flash Flood Statement
National Weather Service Indianapolis IN
336 AM EDT Thu Jul 1 2021

INC045-107-010930-
/O.CON.KIND.FF.W.0020.000000T0000Z-210701T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fountain IN-Montgomery IN-
336 AM EDT Thu Jul 1 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 AM EDT EARLY THIS 
MORNING FOR SOUTHEASTERN FOUNTAIN AND MONTGOMERY COUNTIES...

At 336 AM EDT, Doppler radar indicated thunderstorms producing 
moderate to heavy rain across the warned area. Between 1 and 2.5 
inches of rain have fallen. Additional rainfall amounts up to an 
inch are possible in the warned area. Flash flooding is likely 
ongoing.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Crawfordsville, Veedersburg, Ladoga, Waynetown, Darlington, New 
  Market, Hillsboro, Kingman, New Ross, Wallace, Alamo, Shades State 
  Park and Yeddo.

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.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3996 8732 4011 8733 4013 8670 3987 8670
      3993 8709 3995 8709

FLASH FLOOD...RADAR INDICATED

$$

Ryan

887 
WGUS73 KIND 010928
FFSIND

Flash Flood Statement
National Weather Service Indianapolis IN
528 AM EDT Thu Jul 1 2021

INC045-107-010938-
/O.EXP.KIND.FF.W.0020.000000T0000Z-210701T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Fountain IN-Montgomery IN-
528 AM EDT Thu Jul 1 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 530 AM EDT EARLY THIS MORNING 
FOR SOUTHEASTERN FOUNTAIN AND MONTGOMERY COUNTIES...

Flood waters have receded. Flash flooding is no longer expected to 
pose a threat. Please continue to heed remaining road closures.

LAT...LON 3996 8732 4011 8733 4013 8670 3987 8670
      3993 8709 3995 8709

$$

Ryan

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 9:46 PM EDT	Flash Flood Watch	IND	Bartholomew, Brown, Clay, Daviess, Decatur, Greene and 17 more	15 hr
Jul 1, 12:22 AM EDT	Flash Flood Warning	IND	Clay, Vigo	3 hr
Jul 1, 2:00 AM EDT	Flash Flood Warning	IND	Hendricks, Marion	3 hr
Jul 1, 2:42 AM EDT	Flash Flood Warning	IND	Hancock, Shelby	3 hr
Jul 1, 2:45 AM EDT	Flash Flood Warning	IND	Boone, Hamilton, Hancock, Hendricks, Marion	3 hr
Jul 1, 4:06 AM EDT	Flash Flood Warning	IND	Clinton, Hamilton, Tipton	3 hr
Jul 1, 4:58 AM EDT	Areal Flood Advisory	IND	Hendricks, Marion	3 hr
Jul 1, 8:00 AM EDT	Areal Flood Advisory	IND	Boone, Hamilton, Hancock, Hendricks, Johnson, Marion and 6 more	6 hr
Jul 1, 8:57 AM EDT	Areal Flood Advisory	IND	Clay, Greene, Monroe, Owen	6 hr
Jul 1, 1:02 PM EDT	River Flood Warning	IND	Parke, Vermillion, Vigo	62 hr

Nearby

Flash Flood Warnings in Indiana, 2021 Every flash flood warning in 2021

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.