Tornadoes · United States · Kentucky · 2017

EF0 tornado, Cadiz Broadbent Arpt to Sinking Fork, Kentucky, March 27, 2017

From Cadiz Broadbent Arpt to Sinking Fork, this EF0 tornado ran 4.4 miles across Trigg and Christian counties on March 27, 2017, touching down at 2:27 PM CDT and reaching 125 yards wide. It killed nobody, and did $75,000 of property damage.

The rating scale

Tracks are drawn in the color of the rating. The Enhanced Fujita scale rates the damage rather than measuring the wind: the speeds are what that damage is taken to imply.

  1. EF065 to 85 mphthis tornado

    Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.

  2. EF186 to 110 mph

    Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.

  3. EF2111 to 135 mph

    Considerable damage. Roofs torn off well-built houses, frame homes shifted on their foundations, mobile homes destroyed, large trees snapped or uprooted, cars lifted off the ground.

  4. EF3136 to 165 mph

    Severe damage. Whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned, trees debarked, heavy cars lifted and thrown.

  5. EF4166 to 200 mph

    Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.

  6. EF5over 200 mph

    Incredible damage. Strong frame houses swept off their foundations, car-sized missiles thrown more than 100 meters, steel-reinforced concrete badly damaged, high-rise buildings deformed.

  7. Unrated

    The survey recorded a tornado but could not put a number on it, most often because it crossed open country and damaged nothing a rating can be read from.

The record

Rating
EF0
Date
March 27, 2017
Touchdown
2:27 PM CDT (19:27 UTC)
Lifted
2:33 PM CDT (19:33 UTC)
On the ground
6 minutes
Path length
4.4 miles (7.1 km)
Path width
125 yards (114 m)
Deaths
0
Injuries
0
Property damage
$75,000
Counties
Trigg and Christian counties
Touchdown point
36.933, -87.732
Lift-off point
36.949, -87.654
Record number
1703271327-01

The damage survey

8 damage points were recorded along this path by NWS PAH, in the Damage Assessment Toolkit the survey teams carry. The strongest indicator was rated EF0. The highest wind the damage implies is 81 mph.

  • Damage blown in north and east directions. Width approx. 125 yards. 2 Barns damaged. One blown several inches northward off its foundation and a second had its north wall blown northward with debris blown to the ENE. Amish occupants werte inside and heard a "whistleling freight train" sound.
  • 2 eyewitnesses of the tornado.
  • Back porch roof blown off and up against a tree line. Several trees broken.
  • Small, older barn blown down.

Survey points are preliminary and are the raw material the published rating was built from. Source: NWS Damage Assessment Toolkit.

What the Weather Service recorded

Severe thunderstorms developed during the afternoon within an increasingly moist and unstable air mass across the region. Isolated severe thunderstorm cells organized into a large bowing line of storms that spread east-northeastward across the Pennyrile region of western Kentucky. Numerous reports of large hail were received as the initial cells developed west of Kentucky Lake. Once the bowing line developed, there were pockets of damaging winds and an isolated tornado in the Pennyrile region, extending from Madisonville to the Hopkinsville/Cadiz area. The storms occurred ahead of a cold front as it progressed southeast across southern Illinois and southeast Missouri. The cold front trailed from a low pressure center that moved east-northeast from the St. Louis area.

Peak winds were estimated near 80 mph. The tornado was witnessed by two people. Four barns were damaged, and one small barn was leveled. A house porch roof was blown off. Branches were broken off numerous trees. The damage path began along Highway 128 southwest of Cerulean, then crossed Highway 126 about 1.5 miles south of Cerulean. The tornado continued into Christian County for just a few more tenths of a mile.

The tornado path continued from Trigg County into Christian County. The tornado was only on the ground for about three-tenths of a mile in Christian County before lifting. Two barns were damaged. One barn was blown several inches northward off its foundation. A second barn had its north wall blown northward, with debris blown to the east-northeast. The damage was only about a mile south of Highway 624 near the Trigg County line. Peak winds were estimated near 80 mph.

From NOAA NCEI's Storm Events Database, the narrative the local forecast office wrote for Storm Data.

The warnings

No tornado warning for this county appears in the archive as in force at the moment the tornado touched down.

The county was under a severe thunderstorm watch, issued at 17:08 UTC and running to 22:15 UTC.

Issued (UTC)ExpiredProductOffice
17:08 UTC22:15 UTCSevere Thunderstorm WatchPAH
18:55 UTC19:45 UTCSevere Thunderstorm WarningPAH

Every warning and watch covering the touchdown point that day, from the Iowa Environmental Mesonet's archive of National Weather Service products. Lead time is measured from the issue of the warning in force to the touchdown time in the database, both of which were recorded to the minute by different people.

The forecast that day

The Storm Prediction Center had this point in a Enhanced Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 16:30 UTC.

SPC's Day 1 convective outlook as it stood when the tornado began, read at the touchdown point. The same archive is on the radar archive.

The air that afternoon

The radiosonde launches on either side of the tornado, from the nearest station that was launching then, drawn and analyzed the way Storm Lab does: the same diagram, the same parcel and shear definitions SPC's mesoanalysis uses.

Nashville Metro, TN (KBNA), 12:00Z

7.5 hours before the tornado, 133 km from the path. March 27, 2017.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 12:00Z on 2017-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 48 joules per kilogram, CIN -156, lifted condensation level 1296 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Nashville Metro, TN at 12:00Z on 2017-03-27The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 170 square meters per square second, 0 to 6 km bulk shear 37 knots.19395878Sfc1 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. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
48 J/kg
Mixed-layer CIN
-156 J/kg
Surface CAPE
0 J/kg
Mixed-layer LCL
1296 m above ground
0-6 km bulk shear
37 kt
0-1 km bulk shear
31 kt
0-1 km storm-relative helicity
170 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.0 K/km

Open this sounding in Storm Lab

Nashville Metro, TN (KBNA), 00:00Z

4.5 hours after it, 133 km from the path. March 28, 2017.

Skew-T log-pSkew-T log-p diagram, Nashville Metro, TN at 00:00Z on 2017-03-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel lifted from the surface. Mixed-layer CAPE 12 joules per kilogram, CIN -99, lifted condensation level 1009 meters above ground. Wind barbs in knots down the right edge.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed. The warm shading is its CAPE, the cool shading the inhibition it has to break through.
HodographHodograph, Nashville Metro, TN at 00:00Z on 2017-03-28The wind through the lowest 10 kilometers as a curve, rings every 10 meters per second labeled in knots. Zero to 1 km storm-relative helicity 92 square meters per square second, 0 to 6 km bulk shear 40 knots.193958Sfc1 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. RM and LM are the right and left moving storms Bunkers' method gives; the shaded area is the 0 to 1 km storm-relative helicity.
Mixed-layer CAPE
12 J/kg
Mixed-layer CIN
-99 J/kg
Surface CAPE
68 J/kg
Mixed-layer LCL
1009 m above ground
0-6 km bulk shear
40 kt
0-1 km bulk shear
22 kt
0-1 km storm-relative helicity
92 m²/s²
0-3 km storm-relative helicity
229 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0
0-3 km lapse rate
5.6 K/km

Open this sounding in Storm Lab

The radar

The Ft Campbell radar (KHPX), 43 km away, was scanning. The volume nearest the touchdown began at 19:24 UTC.

Open the radar archive at this moment, over the track

Reflectivity and velocity, decoded from the Level II archive in the browser. Volumes take a few seconds to open the first time.

What was reported nearby

Local storm reports within 60 km of the path, in the three hours either side.

Time (UTC)ReportWhereCountyRemark
18:39 UTCHAIL 1AlmoCalloway, KY
18:50 UTCHAIL 1New ConcordCalloway, KY
18:51 UTCHAIL 0.75New ConcordCalloway, KY
18:58 UTCHAIL 1AuroraMarshall, KY
19:07 UTCHAIL 0.883 Ene MadisonvilleHopkins, KY
19:07 UTCHAIL 1.75HamlinCalloway, KY
19:27 UTCTORNADO2 Sw CeruleanTrigg, KYRATED AT EF-0. ESTIMATED WINDS 80 MPH. PATH LENGTH 4.4 MILES. PATH WIDTH 125 YARDS. TORNADO ENDED 3.25 MILES EAST-SOUTHEAST OF CERULEAN, KY. TWO PEOPLE WITNESSED THE TORNADO. 6 BARNES DAMAGED. 1 SMALL BARN LEVELED. HOUSE
19:32 UTCTSTM WND DMGHopkinsvilleChristian, KYTREES BLOCKING SOUTHBOUND LANE AT INTERSECTION OF KY-109 AND MJ BOYD ROAD.
19:47 UTCHAIL 0.75HopkinsvilleChristian, KYREPORTED AT CHRISTIAN COUNTY HIGH SCHOOL
19:50 UTCTSTM WND DMGMadisonvilleHopkins, KYTHERE IS A TREE DOWN ON A HOUSE. THE TIME IS ESTIMATED
19:55 UTCTSTM WND DMGPembrokeChristian, KYPOWERLINES DOWN ON RAILROAD CROSSING
19:56 UTCTSTM WND DMG5 Wnw CroftonChristian, KYSEVERAL TREES DOWN ACROSS THE ROADWAY AT THE INTERSECTION OF HWY 108 AND 800.
20:00 UTCTSTM WND DMGHopkinsvilleChristian, KYTREES DOWN BLOCKING THE INTERSECTION OF PYLRE AND COX MILL ROADS.
21:09 UTCHAIL 0.75BentonMarshall, KY

From the Iowa Environmental Mesonet's archive of National Weather Service local storm reports.

This ground now

The live radar over the trackEvery 2017 tornado in KentuckyEvery tornado in Kentucky since 1950Warnings in force in Kentucky nowThe forecast where you are

The other tornadoes of March 27, 2017

5 more were confirmed in the United States that day.

DateTimeRatingWherePath (mi)Width (yd)DeathsInjuriesDamage
March 271:59 PM CDTEF0Alcorn, MS0.250
March 274:59 PM CDTEF0Henderson, TN6.450$10,000
March 275:05 PM CDTEF1Metcalfe, KY0.3100$300,000
March 275:18 PM CDTEF1Decatur, TN5.5100$150,000
March 276:12 PM CDTEF1Lewis, TN9.8500$110,000

What this means

Ratings are the survey's, read off the damage rather than measured; the rating scale is above. Tornado counts rise through the record as reporting improved, so a year in the 1950s is not comparable with one today except for the strongest tornadoes, which were always noticed.

Sources

NOAA Storm Prediction Center tornado database, 1950-2025, the official record kept by NOAA's Storm Prediction Center.