Thunderstorms developed near a cold front during the evening of May 10th. These storms produced wind damage and hail as they moved across the area into the early morning hours of May 11th.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS IND wrote it up.
Thunderstorms developed near a cold front during the evening of May 10th. These storms produced wind damage and hail as they moved across the area into the early morning hours of May 11th.
The local office's own words before the first event, 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 the first event at May 10, 9:22 PM EST, 8 minutes earlier.
Area Forecast Discussion National Weather Service Indianapolis IN 1022 PM EDT Wed May 10 2017 .UPDATE... The AVIATION Section has been updated below. && .SYNOPSIS... Issued at 206 PM EDT Wed May 10 2017 For most of the upcoming week, Indiana is going to remain between two weather systems. One will be high pressure centered over the southeast states and the other a complex frontal system over the northern USA. These features are going to take turns controlling what happens in the Hoosier State. Expect a wide variety of weather. && .NEAR TERM /Tonight/... Issued at 934 PM EDT Wed May 10 2017 Line of convection associated with an upper level vorticity center currently over Illinois, is approaching the western border zones. This evening's upper air indicates adequate deep layer shear for severe convection, but lapse rates are not very impressive. This suggests more of a damaging wind threat over hail. Low level helicity is maximized over the northern zones, closest to frontal zone. Short term model guidance suggests this vorticity center will reach the eastern zones around 110600Z. Additional convective development possible later in the night along trailing vorticity tail over the central and southern zones. Heavy rainfall will be a threat most of the night given high precipitable water values. Previous discussion follows. See the HYDROLOGY section below for a discussion of a Flash Flood Watch. Guidance strongly indicates likely to categorical POPs are mostly in order. Precipitable water is extremely high, especially to the north, so heavy rain is a threat. For temperatures, a lot will depend on just when rain falls. Also, a strong thermal boundary may or may mot pass the north. The consensus will handle such problems as well as anything. Possible errors are around 2 degree in the southern counties and 5 degrees in the north. && .SHORT TERM.../Thursday night through Saturday)... Issued at 206 PM EDT Wed May 10 2017 The guidance all maintains a chance of precipitation into Thursday night, with a dry forecast thereafter. There is no reason to change this. Considerable cloudiness is likely into Friday from residual moisture in the boundary layer, and on Saturday from warm advection aloft. Friday night should be mostly clear. Various types of temperature guidance are close. The consensus forecast should be accurate to with 1-3 degrees. && .LONG TERM /Sunday Night through Wednesday/... Issued at 211 PM EDT Wed May 10 2017 Mainly dry weather is expected during the period. ECMWF suggests ridging aloft West of Indiana on Sunday...and slowly moves this feature east through and across the Great Lakes and Indiana through Wednesday. This keeps large and broad high pressure mainly in place across Indiana. By Tuesday night and into Wednesday...the Ridge axis appears to be east of Indiana...allowing a warm SW flow to stream in to the Ohio Valley then. ECMWF hints at a short wave push through the SW flow...but best forcing and moisture remains well north of Central Indiana...closer to the Great Lakes. Thus if there was one day which had best chances for precip it would be Tuesday night and Wednesday...but confidence remains low. && .AVIATION /Discussion for the 110300Z KIND TAF Update/... Issued at 1018 PM EDT Wed May 10 2017 Extrapolation of convective line currently moving into western Indiana suggests it should reach the KIND terminal around 110340Z. Adjusted the wind forecast for the next couple of hours based on current observations. Previous discussion follows. Widely scattered convection possible in the vicinity of KIND/KLAF through the early evening hours, near a frontal zone. Appears a threat for more organized convection will begin moving over the terminals from the west after about 110200Z, as an upper wave currently moving into western Illinois, interacts with the front and an instability axis. Brief IFR visibility restrictions and gusty shifting winds in and near heavier convection. CB bases around 045. Convective threat should diminish over the terminals by 110800Z- 110900Z as the upper wave pushes off to the east. Otherwise, short term model guidance suggests development of IFR ceilings towards sunrise Thursday in the wake of upper wave. Low confidence in wind forecast this evening at the KLAF/KIND terminals due to proximity of front. Winds should veer around to 220-240 degrees at these terminals late tonight in the wake of upper wave. Surface winds 220-240 degrees at 6-10 kts at KHUF/KBMG for the most part tonight. && .IND WATCHES/WARNINGS/ADVISORIES... Flash Flood Watch through Thursday evening for INZ021-029>031- 037>042-046>049-055>057. && SYNOPSIS...JK NEAR TERM...JK/JAS SHORT TERM...JK LONG TERM...JP AVIATION...JAS
Hazardous Weather Outlook National Weather Service Indianapolis IN 544 PM EDT Wed May 10 2017 INZ021-029>031-037>042-046>049-055>057-111000- Carroll-Tippecanoe-Clinton-Howard-Boone-Tipton-Hamilton-Madison- Delaware-Randolph-Hendricks-Marion-Hancock-Henry-Johnson-Shelby-Rush- Including the cities of Lafayette, Frankfort, Kokomo, Anderson, Muncie, Indianapolis, and Shelbyville 544 PM EDT Wed May 10 2017 ...FLASH FLOOD WATCH IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH THURSDAY EVENING... This hazardous weather outlook is for central Indiana. .DAY ONE...Tonight. Outlook: Thunderstorm activity is expected later this evening and overnight. Present indications are that isolated to scattered severe storms are possible. Heavy rainfall may accompany some of the storms, which may lead to flash flooding. In addition, moderate river flooding will continue along lower parts of the Wabash and White. Hazards: Damaging winds, large hail, heavy rainfall resulting in reduced visibility and possible flash flooding, and isolated tornadoes. River Flooding. Timing: River flooding will continue. Best threat for severe storms and flash flooding after 900 PM EDT. Discussion: Scattered thunderstorms are expected through the early evening hours along a frontal zone. A better threat for organized thunderstorms will begin moving into the area after about 900 PM EDT as an upper air disturbance begins interacting with the frontal zone. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Outlook: Thunderstorm activity is expected on Thursday and Thursday night. Heavy rainfall may lead to flash flooding. Isolated to scattered severe storms are possible Thursday, south of a Terre Haute to Rushville Line. Minor to Moderate flooding will continue over parts of the lower Wabash and White rivers through the weekend and into early next week. Discussion: A frontal system will slowly move over the area during the day Thursday and into Thursday evening. Thunderstorm activity near the frontal zone may result in flash flooding. Severe storms are also possible over parts of central and southern Indiana. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible later this evening and overnight, as well as Thursday afternoon and evening. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind INZ028-035-036-043>045-051>054-060>065-067>072-111000- Warren-Fountain-Montgomery-Vermillion-Parke-Putnam-Vigo-Clay-Owen- Morgan-Sullivan-Greene-Monroe-Brown-Bartholomew-Decatur-Knox-Daviess- Martin-Lawrence-Jackson-Jennings- Including the cities of Crawfordsville, Terre Haute, Bloomington, Columbus, Vincennes, Bedford, and Seymour 544 PM EDT Wed May 10 2017 This hazardous weather outlook is for central Indiana. .DAY ONE...Tonight. Thunderstorm activity is expected later this evening and overnight. Present indications are that isolated to scattered severe storms are possible. Heavy rainfall may accompany some of the storms, which may lead to flash flooding. In addition, moderate river flooding will continue along lower parts of the Wabash and White. Hazards: Damaging winds, large hail, heavy rainfall resulting in reduced visibility and possible flash flooding, and isolated tornadoes. River Flooding. Timing: River flooding will continue. Best threat for severe storms and flash flooding after 900 PM EDT. Discussion: Scattered thunderstorm are expected through the early evening hours along a frontal zone. A better threat for organized thunderstorms will begin moving into the area after about 900 PM EDT as an upper air disturbance begins interacting with the frontal zone. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Outlook: Thunderstorm activity is expected on Thursday and Thursday night. Heavy rainfall may lead to flash flooding. Isolated to scattered severe storms are possible Thursday, south of a Terre Haute to Rushville Line. Minor to Moderate flooding will continue over parts of the lower Wabash and White rivers through the weekend and into early next week. Discussion: A frontal system will slowly move over the area during the day Thursday and into Thursday evening. Thunderstorm activity near the frontal zone may result in flash flooding. Severe storms are also possible over parts of central and southern Indiana. .SPOTTER INFORMATION STATEMENT... Spotter activation is possible later this evening and overnight, as well as Thursday afternoon and evening. && More information, along with other weather, hydrological and climate information can be found at http://weather.gov/ind
The Indianapolis radar (KIND), 102 km away, was scanning. The volume nearest the first event began at 02:27 UTC.
14 thunderstorm wind. Local standard time, as filed.
Trees were downed in and near this location due to damaging thunderstorm wind gusts. There were reports of some trees on homes and vehicles. Also, WTHI-TV reported that a large business sign was lifted of its structure and tossed about 20 feet into the business' roof.
Damaging thunderstorm winds were estimated at 60 to 70 mph.
Trees were downed and blocking the road due to damaging thunderstorm wind gusts.
A large tree limb split and was blown onto a house due to damaging thunderstorm wind gusts.
Trees and limbs were down on roads due to damaging thunderstorm wind gusts. Power was turning off and on.
Multiple social media reports of trees downed on roads in and around the Ellettsville area due to damaging thunderstorm wind gusts.
A portion of a warehouse roof and walls were blown down due to damaging thunderstorm wind gusts.
Thunderstorm wind gusts in this location was estimated at 60-plus mph.
Social media reports of trees down due to damaging thunderstorm wind gusts in several locations in and around the Bloomington area, including near the 6500 block of South Old 37 Highway.
Power poles were downed in downtown Edinburgh due to damaging thunderstorm wind gusts. Scattered tree damage was also reported.
Trees were downed in this location due to damaging thunderstorm wind gusts.
Trees were downed in this location due to damaging thunderstorm wind gusts.
A tree was downed in this location due to damaging thunderstorm wind gusts.
Good sized, large tree limbs were downed across town due to damaging thunderstorm wind gusts.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2017Every state in 2017This day in weather historyWarnings in Indiana, May 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 702511, 702513, 702466, 702516, 702488, 702517, 702518, 702519, 702520, 702523, 702524, 702525, 702527, 702533.