Alert archive / Indiana / Flash Flood Warnings in 2021
Flash Flood Warning 1, NWS Indianapolis, IN
NWS Indianapolis, IN issued this flash flood warning at Apr 24, 2021, 12:38 PM EDT for Johnson County, Marion County, Indiana. It was in force for 2 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2021, 12:38 PM EDT (16:38 UTC)
- Expired
- Apr 24, 2021, 12:40 PM EDT
- In force
- 2 min
- Issued by
- NWS Indianapolis, IN
- Area
- Storm-based polygon
- Flood severity
- None
Counties Johnson County, IN, Marion County, IN
The radar
The Indianapolis radar (KIND), 14 km from the middle of the area, began a volume at 16:42 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.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 4.6 hours before the alert went out and 206 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1416 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 71 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
045
WGUS53 KIND 241638
FFWIND
INC081-097-242030-
/O.NEW.KIND.FF.W.0001.210424T1638Z-210424T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Indianapolis IN
1238 PM EDT Sat Apr 24 2021
The National Weather Service in Indianapolis has issued a
* Flash Flood Warning for...
Northeastern Johnson County in central Indiana...
Marion County in central Indiana...
* Until 430 PM EDT.
* At 1238 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 5 inches of rain
have fallen. The expected rainfall rate is 1 inch in 1 hour.
Additional rainfall amounts up to 1 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...
Indianapolis, Carmel, Fishers, Greenwood, Lawrence, Beech Grove,
Speedway, Southport, New Whiteland, Cumberland, Whiteland,
Meridian Hills, Warren Park, Homecroft, Rocky Ripple, Williams
Creek, Wynnedale, Spring Hill, Crows Nest and North Crows Nest.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3991 8633 3993 8624 3993 8595 3953 8595
3955 8615
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1 INCH IN 1 HOUR
$$
MK1 follow-up statement
365
WGUS73 KIND 241640
FFSIND
Flash Flood Statement
National Weather Service Indianapolis IN
1240 PM EDT Sat Apr 24 2021
INC081-097-241650-
/O.CAN.KIND.FF.W.0001.000000T0000Z-210424T2030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Johnson IN-Marion IN-
1240 PM EDT Sat Apr 24 2021
...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN JOHNSON AND
MARION COUNTIES...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
LAT...LON 3991 8633 3993 8624 3993 8595 3953 8595
3955 8615
$$
JPNearby
Flash Flood Warnings in Indiana, 2021Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.