Alert archive / Indiana / Flash Flood Warnings in 2021

Flash Flood Warning 21, NWS Indianapolis, IN

July 1, 2021Hancock County, Shelby County, Indiana

NWS Indianapolis, IN issued this flash flood warning at Jul 1, 2021, 2:42 AM EDT for Hancock County, Shelby 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, 2:42 AM EDT (06:42 UTC)
Expired: Jul 1, 2021, 5:45 AM EDT
In force: 3 hr
Issued by: NWS Indianapolis, IN
Area: Storm-based polygon
Flood severity: None

Counties Hancock County, IN, Shelby County, IN

The radar

The Indianapolis radar (KIND), 42 km from the middle of the area, began a volume at 06:42 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 Ssw Greenfield, IN	FLOODING IN LOW LYING AREAS AND WATER OVER ROADS ACROSS THE COUNTY. TIME ESTIMATED FROM RADAR.

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, 6.7 hours before the alert went out and 174 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: 1557 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 768 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 53 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

060 
WGUS53 KIND 010642
FFWIND
INC059-145-010945-
/O.NEW.KIND.FF.W.0021.210701T0642Z-210701T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Indianapolis has issued a

* Flash Flood Warning for...
  Southern Hancock County in central Indiana...
  Northern Shelby County in central Indiana...

* Until 545 AM EDT.

* At 242 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 0.5 and 1.5 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...
  Shelbyville, Greenfield, Cumberland, New Palestine, Morristown, 
  Fairland and Spring Lake.

This includes the following highways...
	Interstate 70 between mile markers 94 and 101.
	Interstate 74 between mile markers 101 and 107.

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 3985 8595 3979 8561 3979 8563 3956 8563
      3962 8595

FLASH FLOOD...RADAR INDICATED

$$

Ryan

2 follow-up statements

644 
WGUS73 KIND 010816
FFSIND

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

INC059-145-010945-
/O.CON.KIND.FF.W.0021.000000T0000Z-210701T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hancock IN-Shelby IN-
416 AM EDT Thu Jul 1 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM EDT EARLY THIS 
MORNING FOR SOUTHERN HANCOCK AND NORTHERN SHELBY COUNTIES...

At 416 AM EDT, Doppler radar indicated thunderstorms producing 
moderately to occasionally heavy rain across the warned area. 
Between 1 and 2 inches of rain have fallen over parts of the warned 
area. Additional rainfall amounts up to an inch 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...
  Shelbyville, Greenfield, Cumberland, New Palestine, Morristown, 
  Fairland and Spring Lake.

This includes the following highways...
	Interstate 70 between mile markers 94 and 102.
	Interstate 74 between mile markers 101 and 107.

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 3985 8595 3979 8561 3979 8563 3956 8563
      3962 8595

FLASH FLOOD...RADAR INDICATED

$$

Ryan

356 
WGUS73 KIND 010942
FFSIND

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

INC059-145-010952-
/O.EXP.KIND.FF.W.0021.000000T0000Z-210701T0945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hancock IN-Shelby IN-
542 AM EDT Thu Jul 1 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 545 AM EDT EARLY THIS MORNING 
FOR SOUTHERN HANCOCK AND NORTHERN SHELBY COUNTIES...

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

A Flash Flood Watch remains in effect until 200 PM EDT Thursday for 
portions of central Indiana, south central Indiana, southeast 
Indiana, southwest Indiana and west central Indiana.

LAT...LON 3985 8595 3979 8561 3979 8563 3956 8563
      3962 8595

$$

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, 2:24 AM EDT	Flash Flood Warning	IND	Fountain, Montgomery	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.