Alert archive / Indiana / Areal Flood Warnings in 2017

Areal Flood Warning 83, NWS Indianapolis, IN

November 18, 201722 counties in Indiana

NWS Indianapolis, IN issued this areal flood warning at Nov 18, 2017, 1:38 PM EST for 22 counties in Indiana. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Nov 18, 2017, 1:38 PM EST (18:38 UTC)
Expired
Nov 18, 2017, 4:30 PM EST
In force
3 hr
Issued by
NWS Indianapolis, IN
Area
Storm-based polygon
Flood severity
None
All 22 counties

Boone County, IN, Clay County, IN, Clinton County, IN, Delaware County, IN, Fountain County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Madison County, IN, Marion County, IN, Montgomery County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Randolph County, IN, Tippecanoe County, IN, Tipton County, IN, Vermillion County, IN, Vigo County, IN

The radar

The Indianapolis radar (KIND), 28 km from the middle of the area, began a volume at 18:37 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 12:00Z, 6.6 hours before the alert went out and 186 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 12:00Z on 2017-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2017-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 204 square meters per square second.1939587897117136Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
599 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
204 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood warning 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 warning went out at Nov 18, 12:53 PM EST, 45 minutes earlier.

Area forecast discussion, Nov 18, 12:53 PM EST, 45 minutes before
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Hazardous weather outlook, Nov 18, 4:58 AM EST, 8 hours 40 minutes before
Hazardous Weather Outlook
National Weather Service Indianapolis IN
458 AM EST Sat Nov 18 2017

INZ021-028>031-035>041-191100-
Carroll-Warren-Tippecanoe-Clinton-Howard-Fountain-Montgomery-Boone-
Tipton-Hamilton-Madison-Delaware-
Including the cities of Lafayette, Frankfort, Kokomo,
Crawfordsville, Anderson, and Muncie
458 AM EST Sat Nov 18 2017

This hazardous weather outlook is for central Indiana.

.DAY ONE...Today and Tonight.

Outlook: Thunderstorm activity is expected today. There is a risk of
isolated severe storms from about midday through the late afternoon.
Damaging winds and large hail are the main threats. Heavy amounts of
rain are also possible today.

Winds may gust to near 40 mph this afternoon and evening outside of
thunderstorms.

Hazards: Damaging wind gusts, large hail, cloud to ground lightning,
ponding of water and reduced visibility due to heavy rainfall.

Timing: Best chances for severe storms from near the midday hours
through late this afternoon. Heavy rainfall possible at any time
today.

Discussion: A low pressure system is expected to move through Indiana
this afternoon, bringing numerous showers and thunderstorms. Strong
wind gusts are possible with thunderstorms this afternoon, and near
and behind the cold front. Shower activity and strong winds are
expected to end late this evening as the low pressure system moves
away.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Outlook: No hazardous weather is expected at this time.

Discussion: Generally dry weather is expected for much of next week
as high pressure builds into the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed from the midday hours through late
this afternoon.

&&

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

INZ042>049-051>057-060>065-067>072-191100-
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 Indianapolis, Terre Haute, Shelbyville,
Bloomington, Columbus, Vincennes, Bedford, and Seymour
458 AM EST Sat Nov 18 2017

...WIND ADVISORY IN EFFECT FROM 11 AM THIS MORNING TO 1 AM EST
SUNDAY...

This hazardous weather outlook is for central Indiana.

Outlook: Thunderstorm activity is expected today. There is a risk of
isolated to scattered severe storms from about midday through the
late afternoon. Damaging winds are the main threat, although large
hail and isolated tornadoes are also possible. Heavy amounts of rain
are also possible today.

Winds may gust 40 to 50 mph this afternoon and evening outside of
thunderstorms.

Hazards: Damaging wind gusts, large hail, isolated tornadoes, cloud
to ground lightning, ponding of water and reduced visibility due to
heavy rainfall.

Timing: Best chances for severe storms from near the midday hours
through late this afternoon. Heavy rainfall possible at any time
today.

Discussion: A low pressure system is expected to move through Indiana
this afternoon, bringing numerous showers and thunderstorms. Strong
wind gusts are possible with thunderstorms this afternoon, and near
and behind the cold front. Shower activity and strong winds are
expected to end late this evening as the low pressure system moves
away.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

Outlook: No hazardous weather is expected at this time.

Discussion: Generally dry weather is expected for much of next week
as high pressure builds into the area.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed from the midday hours through late
this afternoon.

&&

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, Nov 18, 11:10 AM EST, 2 hours 28 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
1110 AM EST SAT NOV 18 2017

INZ028-029-035-036-181700-
Montgomery IN-Fountain IN-Warren IN-Tippecanoe IN-
1110 AM EST SAT NOV 18 2017

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL FOUNTAIN...WESTERN
TIPPECANOE...WARREN AND NORTHWESTERN MONTGOMERY COUNTIES UNTIL NOON
EST...

At 1109 AM EST, Doppler radar was tracking a strong thunderstorm 7
miles west of Williamsport, or 13 miles northeast of Danville, moving
east at 45 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Lafayette, West Lafayette, Covington, Veedersburg, Williamsport,
Attica, Shadeland, Linden, West Lebanon, New Richmond, Wingate,
Newtown, Pine Village, Mellott, Purdue University, Foster and
Rainsville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 4056 8689 4015 8687 4011 8741 4013 8741
      4013 8749 4015 8749 4015 8752 4033 8753
      4048 8727 4048 8709 4056 8709
TIME...MOT...LOC 1609Z 262DEG 40KT 4026 8743

PUMA
Local storm report, Nov 18, 11:24 AM EST, 2 hours 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1124 AM EST SAT NOV 18 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1120 AM     FLOOD            LAFAYETTE               40.41N 86.87W
11/18/2017                   TIPPECANOE         IN   PUBLIC

            MULTIPLE REPORTS OF WATER PONDING IN YARDS
            ACROSS LAFAYETTE.

&&

KEH
Local storm report, Nov 18, 12:04 PM EST, 1 hour 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1204 PM EST SAT NOV 18 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1120 AM     TSTM WND DMG     2 ENE DAYTON            40.39N 86.73W
11/18/2017                   TIPPECANOE         IN   EMERGENCY MNGR

            TREES DOWN AT 900 E AND 200 S. TIME
            ESTIMATED FROM REPORT AND RADAR.

&&

KEH
Local storm report, Nov 18, 12:21 PM EST, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1221 PM EST SAT NOV 18 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1150 AM     TSTM WND DMG     1 E FRANKFORT           40.28N 86.48W
11/18/2017                   CLINTON            IN   PUBLIC

            WALMART ROOF COLLAPSE AND FRONT DAMAGED.
            STORE EVACUATED. SEMI TRUCKS POSSIBLY
            KNOCKED OVER. INJURIES REPORTED, UNSURE HOW
            MANY.

&&

KEH
Local storm report, Nov 18, 12:32 PM EST, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
1232 PM EST SAT NOV 18 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1220 PM     FLOOD            THORNTOWN               40.13N 86.61W
11/18/2017                   BOONE              IN   PUBLIC

            YARDS FLOODED IN THORNTOWN. VIA TWITTER.

&&

KEH
Local storm report, Nov 18, 1:34 PM EST, 4 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE INDIANAPOLIS IN
134 PM EST SAT NOV 18 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1132 AM     TSTM WND DMG     2 E LINDEN              40.19N 86.86W
11/18/2017                   MONTGOMERY         IN   PUBLIC

            TREES DOWN ACROSS THE ROAD AND TWO POLE
            BARNS DAMAGED. TIME ESTIMATED FROM RADAR.

&&

KEH

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 18, 11:10 AM ESTSpecial Weather StatementINDTippecanoe, Warren50 min
Nov 18, 11:15 AM ESTAreal Flood WarningINDCarroll, Clinton, Fountain, Howard, Tippecanoe, Warren6 hr
Nov 18, 11:40 AM ESTSevere Thunderstorm WarningINDBoone, Clinton, Montgomery, Tippecanoe50 min
Nov 18, 12:13 PM ESTSevere Thunderstorm WarningINDHamilton, Tipton32 min
Nov 18, 12:38 PM ESTSevere Thunderstorm WarningINDDelaware, Hamilton, Madison, Tipton37 min
Nov 18, 4:30 PM ESTAreal Flood WarningINDDelaware, Hamilton, Hancock, Henry, Howard, Madison and 3 more18 hr
Nov 18, 5:13 PM ESTAreal Flood WarningINDCarroll, Clinton, Fountain, Howard, Tippecanoe, Warren15 hr
Nov 18, 5:40 PM ESTRiver Flood WarningINDDelaware, Randolph42 hr
Nov 18, 5:48 PM ESTRiver Flood WarningINDTippecanoe62 hr
Nov 18, 6:17 PM ESTRiver Flood WarningINDFountain, Parke, Tippecanoe, Vermillion, Warren6 days

Nearby

Areal Flood Warnings in Indiana, 2017Every areal flood warning in 2017

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.