Alert archive / Indiana / Flood Watches in 2026
Flood Watch 4, NWS Indianapolis, IN
NWS Indianapolis, IN issued this flood watch at May 18, 2026, 12:33 PM EDT for 15 counties in Indiana. It was in force for 10 hr.
The area
The counties it named.
The facts
- Issued
- May 18, 2026, 12:33 PM EDT (16:33 UTC)
- Expired
- May 18, 2026, 11:00 PM EDT
- In force
- 10 hr
- Issued by
- NWS Indianapolis, IN
- Flood severity
- None
Counties Brown County, IN, Clay County, IN, Greene County, IN, Hendricks County, IN, Johnson County, IN, Knox County, IN, Marion County, IN, Monroe County, IN, Morgan County, IN, Owen County, IN, Parke County, IN, Putnam County, IN, Sullivan County, IN, Vermillion County, IN, Vigo County, IN
The radar
The Indianapolis radar (KIND), 58 km from the middle of the area, began a volume at 16:36 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, 4.6 hours before the alert went out and 172 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
- 850 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 966 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 301 m²/s²
- 0-3 km storm-relative helicity
- 331 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 8.8
What forecasters said that day
The local office's own words before this flood watch 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 flood watch went out at May 18, 10:14 AM EDT, 2 hours 19 minutes earlier.
Area forecast discussion, May 18, 10:14 AM EDT, 2 hours 19 minutes before
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</html>Hazardous weather outlook, May 18, 3:10 AM EDT, 9 hours 23 minutes before
Hazardous Weather Outlook National Weather Service Indianapolis IN 310 AM EDT Mon May 18 2026 INZ021-028>031-035>049-051>057-060>065-067>072-191000- 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- 310 AM EDT Mon May 18 2026 This hazardous weather outlook is for central Indiana. .DAY ONE...Today and Tonight. Thunderstorms will impact central Indiana this afternoon into the evening. Severe storms are possible with damaging winds and large hail as the primary threats. Torrential rainfall producing localized flooding is also possible, focused especially across the southwest half of central Indiana. The timing of greatest impacts will be between 1 pm and 7 pm. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Scattered severe storms are possible again Tuesday afternoon and evening. Damaging winds and large hail will be the primary threats with localized flooding possible. Additional chances for thunderstorms return Friday into the holiday weekend. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed later today, and possibly Tuesday afternoon and evening as well. Spotters are encouraged to continue monitoring the forecast. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind Ryan
In the hours before
Special weather statement, May 18, 11:56 AM EDT, 37 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
1156 AM EDT Mon May 18 2026
INZ028-029-035-036-043-181645-
Montgomery IN-Fountain IN-Warren IN-Vermillion IN-Tippecanoe IN-
1156 AM EDT Mon May 18 2026
...Strong thunderstorms will impact portions of Fountain, western
Tippecanoe, Warren, northwestern Vermillion and northwestern
Montgomery Counties through 1245 PM EDT...
At 1156 AM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Boswell to 8 miles north of Newport.
Movement was northeast at 45 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Lafayette, West Lafayette, Covington, Veedersburg, Williamsport,
Attica, Shadeland, West Lebanon, Hillsboro, Perrysville, New
Richmond, Wingate, Newtown, Pine Village, Mellott, State Line City,
Purdue University, Pence, Foster, and Tab.
This includes the following highways...
Interstate 65 between mile markers 179 and 184.
Interstate 74 between mile markers 1 and 20.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
west central Indiana.
&&
LAT...LON 4056 8688 4024 8688 3994 8753 4048 8753
4048 8709 4056 8709
TIME...MOT...LOC 1556Z 223DEG 38KT 4048 8746 4000 8747
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
UpdikeSpecial weather statement, May 18, 12:24 PM EDT, 9 minutes before
Special Weather Statement
National Weather Service Indianapolis IN
1224 PM EDT Mon May 18 2026
INZ029-035-036-043>045-181715-
Montgomery IN-Putnam IN-Fountain IN-Parke IN-Vermillion IN-
Tippecanoe IN-
1224 PM EDT Mon May 18 2026
...Strong thunderstorms will impact portions of southern Fountain,
south central Tippecanoe, Parke, Vermillion, western Montgomery and
northwestern Putnam Counties through 115 PM EDT...
At 1223 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Georgetown to near Vermilion. Movement was
northeast at 50 mph.
HAZARD...Winds in excess of 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Crawfordsville, Clinton, Rockville, Veedersburg, Newport, Fairview
Park, Cayuga, Montezuma, Waynetown, Linden, New Market, Dana,
Hillsboro, Kingman, Perrysville, Waveland, Universal, Russellville,
Mecca, and Bloomingdale.
This includes Interstate 74 between mile markers 15 and 35.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 600 PM EDT for
west central Indiana.
&&
LAT...LON 4002 8753 4027 8687 3976 8687 3961 8751
3961 8753
TIME...MOT...LOC 1623Z 240DEG 42KT 3997 8755 3965 8754
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
UpdikeThe office that day
Everything else NWS Indianapolis, IN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 11:56 AM EDT | Special Weather Statement | IND | Fountain, Tippecanoe, Warren | 49 min |
| May 18, 12:24 PM EDT | Special Weather Statement | IND | Fountain, Montgomery, Parke, Vermillion | 51 min |
| May 18, 12:44 PM EDT | Special Weather Statement | IND | Fountain, Tippecanoe, Warren | 31 min |
| May 18, 12:52 PM EDT | Special Weather Statement | IND | Vermillion | 23 min |
| May 18, 12:56 PM EDT | Severe Thunderstorm Warning | IND | Clay, Parke, Vermillion, Vigo | 36 min |
| May 18, 1:07 PM EDT | Special Weather Statement | IND | Sullivan | 23 min |
| May 18, 1:19 PM EDT | Special Weather Statement | IND | Clay, Owen | 26 min |
| May 18, 1:29 PM EDT | Special Weather Statement | IND | Putnam | 31 min |
| May 18, 1:31 PM EDT | Severe Thunderstorm Warning | IND | Clay, Owen, Putnam | 44 min |
| May 18, 1:50 PM EDT | Severe Thunderstorm Warning | IND | Boone, Hamilton, Hendricks, Johnson, Marion, Morgan and 2 more | 55 min |
| May 18, 2:13 PM EDT | Areal Flood Advisory | IND | Clay, Greene, Owen, Putnam, Sullivan, Vigo | 56 min |
| May 18, 2:21 PM EDT | Special Weather Statement | IND | Howard | 24 min |
| May 18, 2:35 PM EDT | Special Weather Statement | IND | Tipton | 25 min |
| May 18, 2:37 PM EDT | Special Weather Statement | IND | Hamilton, Hancock, Madison, Marion | 53 min |
| May 18, 2:40 PM EDT | Severe Thunderstorm Warning | IND | Delaware, Hamilton, Hancock, Madison, Marion | 39 min |
| May 18, 2:46 PM EDT | Special Weather Statement | IND | Johnson, Morgan | 44 min |
| May 18, 3:02 PM EDT | Special Weather Statement | IND | Madison | 28 min |
| May 18, 3:09 PM EDT | Areal Flood Warning | IND | Clay, Greene, Owen, Putnam, Sullivan, Vigo | 9 hr |
| May 18, 3:21 PM EDT | Special Weather Statement | IND | Delaware, Hancock, Madison | 39 min |
| May 18, 3:31 PM EDT | Special Weather Statement | IND | Delaware | 14 min |
| May 18, 3:36 PM EDT | Areal Flood Warning | IND | Boone, Hamilton, Hendricks, Johnson, Marion, Morgan | 9 hr |
| May 18, 3:48 PM EDT | Severe Thunderstorm Warning | IND | Delaware, Hancock, Henry, Madison, Rush | 29 min |
| May 18, 3:55 PM EDT | Areal Flood Advisory | IND | Clay, Daviess, Greene, Knox, Martin, Monroe and 1 more | 37 min |
| May 18, 4:04 PM EDT | Special Weather Statement | IND | Delaware | 26 min |
| May 18, 4:14 PM EDT | Special Weather Statement | IND | Delaware | 46 min |
| May 18, 4:22 PM EDT | Special Weather Statement | IND | Daviess | 38 min |
| May 18, 4:28 PM EDT | Areal Flood Advisory | IND | Hancock, Henry, Johnson, Madison, Shelby | 3 hr |
| May 18, 4:32 PM EDT | Areal Flood Warning | IND | Clay, Daviess, Greene, Knox, Martin, Monroe and 1 more | 14 hr |
| May 18, 4:45 PM EDT | Special Weather Statement | IND | Johnson | 45 min |
| May 18, 5:07 PM EDT | Special Weather Statement | IND | Daviess, Martin | 38 min |
| May 18, 5:15 PM EDT | Areal Flood Warning | IND | Bartholomew, Brown, Daviess, Greene, Jackson, Lawrence and 3 more | 17 hr |
| May 18, 5:37 PM EDT | Severe Thunderstorm Warning | IND | Daviess, Martin | 23 min |
| May 18, 5:39 PM EDT | Special Weather Statement | IND | Rush | 51 min |
| May 18, 5:40 PM EDT | Special Weather Statement | IND | Randolph | 20 min |
| May 18, 5:44 PM EDT | Special Weather Statement | IND | Bartholomew, Brown, Jackson, Lawrence | 46 min |
| May 18, 5:55 PM EDT | Special Weather Statement | IND | Martin | 20 min |
| May 18, 6:05 PM EDT | Special Weather Statement | IND | Decatur | 40 min |
| May 18, 6:15 PM EDT | Special Weather Statement | IND | Bartholomew, Decatur, Jennings | 60 min |
| May 18, 7:12 PM EDT | Special Weather Statement | IND | Decatur | 18 min |
| May 18, 7:24 PM EDT | Areal Flood Advisory | IND | Bartholomew, Shelby | 5 hr |
| May 18, 7:30 PM EDT | Areal Flood Advisory | IND | Johnson | 5 hr |
Nearby
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.