Alert archive / Indiana / Areal Flood Advisories in 2021

Areal Flood Advisory 44, NWS Indianapolis, IN

December 11, 20216 counties in Indiana

NWS Indianapolis, IN issued this areal flood advisory at Dec 11, 2021, 1:44 AM EST for 6 counties in Indiana. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Dec 11, 2021, 1:44 AM EST (06:44 UTC)
Expired
Dec 11, 2021, 6:00 AM EST
In force
4 hr
Issued by
NWS Indianapolis, IN
Area
Storm-based polygon

Counties Boone County, IN, Clinton County, IN, Montgomery County, IN, Parke County, IN, Putnam County, IN, Vermillion County, IN

The radar

The Indianapolis radar (KIND), 59 km from the middle of the area, began a volume at 06:49 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

Lincoln, IL (KILX), launched 00:00Z, 6.7 hours before the alert went out and 147 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2021-12-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 119 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2021-12-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 341 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
119 J/kg
Mixed-layer CIN
-33 J/kg
Mixed-layer LCL
662 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
341 m²/s²
0-3 km storm-relative helicity
357 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Indianapolis, IN wrote its last area forecast discussion before this areal flood advisory went out at Dec 11, 12:58 AM EST, 46 minutes earlier.

Area forecast discussion, Dec 11, 12:58 AM EST, 46 minutes before
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Hazardous weather outlook, Dec 10, 7:54 PM EST, 5 hours 50 minutes before
Hazardous Weather Outlook
National Weather Service Indianapolis IN
754 PM EST Fri Dec 10 2021

INZ021-028>031-035>049-051>057-060>065-067>072-120100-
Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone-
Tipton-Hamilton-Madison-Delaware-Randolph-Vermillion-Parke-Putnam-
Hendricks-Marion-Hancock-Henry-Vigo-Clay-Owen-Morgan-Johnson-Shelby-
Rush-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess-
Martin-Lawrence-Jackson-Jennings-
Including the cities of Delphi, Flora, Williamsport, West Lebanon,
Lafayette, West Lafayette, Frankfort, Kokomo, Attica, Covington,
Veedersburg, Crawfordsville, Lebanon, Zionsville, Tipton, Fishers,
Carmel, Noblesville, Anderson, Muncie, Winchester, Union City,
Farmland, Parker City, Clinton, Fairview Park, Rockville, Montezuma,
Rosedale, Greencastle, Plainfield, Brownsburg, Danville,
Indianapolis, Greenfield, New Castle, Terre Haute, Brazil, Spencer,
Gosport, Martinsville, Mooresville, Greenwood, Franklin,
Shelbyville, Rushville, Sullivan, Carlisle, Shelburn, Farmersburg,
Linton, Bloomfield, Jasonville, Worthington, Bloomington, Nashville,
Columbus, Greensburg, Vincennes, Washington, Loogootee, Shoals,
Bedford, Mitchell, Seymour, and North Vernon
754 PM EST Fri Dec 10 2021

This hazardous weather outlook is for central Indiana.

.DAY ONE...Tonight.

Severe thunderstorms possible late this evening into the overnight
hours. Damaging winds will be the primary risk from storms, but a few
tornadoes and large hail will also be possible. Brief heavy rainfall
may produce localized flooding in some locations as well.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

Strong westerly wind gusts up to 40 to 50 mph are expected Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed tonight and early Saturday.

&&

More information, along with other weather, hydrological and climate
information can be found at http://weather.gov/ind

In the hours before

Special weather statement, Dec 10, 8:30 PM EST, 5 hours 14 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
830 PM EST Fri Dec 10 2021

INZ061-062-068>070-110215-
Daviess IN-Martin IN-Lawrence IN-Greene IN-Monroe IN-
830 PM EST Fri Dec 10 2021

...A strong thunderstorm will impact portions of southern Monroe,
Martin, southeastern Greene, Lawrence and Daviess Counties through
915 PM EST...

At 830 PM EST, Doppler radar was tracking a strong thunderstorm over
Washington, or 13 miles northeast of Petersburg, moving northeast at
65 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
  Bedford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3863 8725 3863 8724 3865 8725 3866 8724
      3866 8725 3867 8726 3919 8646 3908 8637
      3905 8637 3905 8635 3899 8632 3896 8628
      3888 8628 3852 8714
TIME...MOT...LOC 0130Z 234DEG 55KT 3864 8713

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

NIELD
Special weather statement, Dec 10, 9:22 PM EST, 4 hours 22 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
922 PM EST Fri Dec 10 2021

INZ072-110245-
Jennings IN-
922 PM EST Fri Dec 10 2021

...A strong thunderstorm will impact portions of central Jennings
County through 945 PM EST...

At 921 PM EST, Doppler radar was tracking a strong thunderstorm near
Vernon, or 11 miles east of Seymour, moving northeast at 55 mph.

HAZARD...Winds in excess of 40 mph and penny size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  North Vernon and Vernon around 925 PM EST.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Tornado Watch remains in effect until 300 AM EST for south central
and southeastern Indiana.

&&

LAT...LON 3889 8580 3896 8580 3914 8544 3891 8545
      3891 8554 3889 8554 3885 8577
TIME...MOT...LOC 0221Z 240DEG 48KT 3892 8567

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH

KH
Special weather statement, Dec 10, 9:34 PM EST, 4 hours 10 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
934 PM EST Fri Dec 10 2021

INZ055-056-063-064-110300-
Johnson IN-Brown IN-Bartholomew IN-Shelby IN-
934 PM EST Fri Dec 10 2021

...A strong thunderstorm will impact portions of southwestern Shelby,
southeastern Johnson, central Brown and northern Bartholomew Counties
through 1000 PM EST...

At 934 PM EST, Doppler radar was tracking a strong thunderstorm over
Nashville, or 14 miles east of Bloomington, moving northeast at 60
mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This storm will remain over mainly rural areas of southwestern
Shelby, southeastern Johnson, central Brown and northern Bartholomew
Counties, including the following locations... Marietta, Yellowwood
Lake, Flat Rock, Princes Lakes, Edinburgh, Clifford, Gnaw Bone, Hope
and Taylorsville.

This includes Interstate 65 between mile markers 70 and 86.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

A Tornado Watch remains in effect until 300 AM EST for central and
south central Indiana.

&&

LAT...LON 3909 8633 3915 8637 3918 8637 3949 8591
      3930 8573
TIME...MOT...LOC 0234Z 234DEG 53KT 3917 8625

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

KH
Special weather statement, Dec 10, 11:14 PM EST, 2 hours 30 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
1114 PM EST Fri Dec 10 2021

INZ045>048-053>057-062-063-110445-
Rush IN-Johnson IN-Brown IN-Owen IN-Morgan IN-Putnam IN-Hendricks IN-
Shelby IN-Hancock IN-Monroe IN-Marion IN-
1114 PM EST Fri Dec 10 2021

...Strong thunderstorms will impact portions of Shelby, southwestern
Hancock, northern Monroe, west central Rush, Morgan, Johnson,
northern Brown, Hendricks, northeastern Owen, Marion and southeastern
Putnam Counties through 1145 PM EST...

At 1114 PM EST, Doppler radar was tracking strong thunderstorms along
a line extending from 13 miles northwest of Spencer to 8 miles
northwest of Nashville. Movement was northeast at 75 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects.

Locations impacted include...
  Franklin, Mooresville, Danville, Shelbyville, Plainfield and
  Speedway.

This includes the following highways...
 Interstate 65 between mile markers 83 and 127.
 Interstate 70 between mile markers 34 and 90.
 Interstate 74 between mile markers 64 and 117.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Tornado Watch remains in effect until 300 AM EST for central, south
central and west central Indiana.

&&

LAT...LON 3962 8550 3934 8605 3935 8608 3933 8608
      3920 8634 3942 8694 3947 8694 3947 8699
      3993 8637
TIME...MOT...LOC 0414Z 232DEG 64KT 3945 8689 3927 8637

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

NIELD
Local storm report, Dec 11, 12:39 AM EST, 1 hour 5 minutes before
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Local storm report, Dec 11, 1:21 AM EST, 23 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Dec 10, 8:30 PM ESTSpecial Weather StatementINDDaviess, Lawrence, Martin45 min
Dec 10, 9:22 PM ESTSpecial Weather StatementINDJennings23 min
Dec 10, 9:34 PM ESTSpecial Weather StatementINDBrown26 min
Dec 10, 9:38 PM ESTSevere Thunderstorm WarningINDBartholomew, Brown, Johnson, Shelby25 min
Dec 10, 11:14 PM ESTSpecial Weather StatementINDHendricks, Johnson, Marion, Morgan, Shelby31 min
Dec 10, 11:32 PM ESTSevere Thunderstorm WarningINDFountain, Vermillion, Warren28 min
Dec 10, 11:42 PM ESTSevere Thunderstorm Warning Considerable damage threatINDDaviess, Greene, Knox, Martin, Monroe, Owen33 min
Dec 10, 11:45 PM ESTTornado WarningINDFountain, Parke, Vermillion30 min
Dec 10, 11:55 PM ESTSevere Thunderstorm Warning Considerable damage threatINDDaviess, Greene, Knox, Sullivan35 min
Dec 10, 11:55 PM ESTSevere Thunderstorm WarningINDFountain, Montgomery, Parke, Tippecanoe, Vermillion, Vigo and 1 more35 min
Dec 11, 12:10 AM ESTTornado WarningINDDaviess, Greene, Knox, Sullivan22 min
Dec 11, 12:16 AM ESTSevere Thunderstorm WarningINDCarroll, Clinton, Montgomery, Parke, Putnam, Tippecanoe29 min
Dec 11, 12:36 AM ESTSevere Thunderstorm WarningINDBoone, Carroll, Clinton, Hamilton, Howard, Montgomery and 1 more24 min
Dec 11, 12:58 AM ESTSevere Thunderstorm WarningINDBoone, Clinton, Hamilton, Hendricks, Howard, Madison and 4 more32 min
Dec 11, 1:05 AM ESTSevere Thunderstorm WarningINDParke, Vermillion, Vigo25 min
Dec 11, 1:18 AM ESTSevere Thunderstorm WarningINDDelaware, Hamilton, Henry, Madison, Tipton38 min
Dec 11, 1:28 AM ESTSevere Thunderstorm WarningINDClay, Parke, Putnam, Vigo32 min
Dec 11, 1:49 AM ESTSevere Thunderstorm WarningINDHendricks, Putnam26 min
Dec 11, 1:59 AM ESTSevere Thunderstorm WarningINDHendricks, Putnam21 min
Dec 11, 2:08 AM ESTSpecial Weather StatementINDDaviess, Greene, Knox, Martin52 min
Dec 11, 2:15 AM ESTSevere Thunderstorm WarningINDHamilton, Marion30 min
Dec 11, 2:35 AM ESTSevere Thunderstorm WarningINDDelaware, Henry, Madison25 min
Dec 11, 2:40 AM ESTSpecial Weather StatementINDBrown, Johnson, Monroe50 min
Dec 11, 2:56 AM ESTSevere Thunderstorm WarningINDDelaware, Randolph34 min
Dec 11, 2:56 AM ESTSevere Thunderstorm WarningINDBartholomew, Brown, Johnson, Monroe, Morgan, Shelby34 min
Dec 11, 3:31 AM ESTAreal Flood AdvisoryINDBoone, Delaware, Hamilton, Madison, Tipton3 hr
Dec 11, 3:39 AM ESTSpecial Weather StatementINDRush36 min
Dec 11, 3:44 AM ESTSevere Thunderstorm WarningINDRush16 min
Dec 11, 3:53 AM ESTSpecial Weather StatementINDJennings37 min
Dec 11, 10:17 AM ESTAreal Flood WarningINDRush23 hr
Dec 11, 11:49 AM ESTRiver Flood WarningINDDelaware, Randolph16 hr

Nearby

Areal Flood Advisories in Indiana, 2021Every areal flood advisory 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.