Tornadoes · United States · Ohio · 2017

EF0 tornado, Samantha to New Petersburg, Ohio, March 1, 2017

Name: EF0 tornado, Samantha to New Petersburg, Ohio, March 1, 2017
Start: 2017-03-01T07:31:00.000Z
End: 2017-03-01T07:39:00.000Z
Location: Samantha to New Petersburg, Ohio

From Samantha to New Petersburg, this EF0 tornado ran 6.9 miles across Highland County on March 1, 2017, touching down at 2:31 AM EST and reaching 250 yards wide. It killed nobody, and did $30,000 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.

EF065 to 85 mphthis tornado
Light damage. Surface peeled off some roofs, gutters and siding damaged, branches broken, shallow-rooted trees pushed over.
EF186 to 110 mph
Moderate damage. Roofs badly stripped, mobile homes overturned or badly damaged, exterior doors lost, windows broken.
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.
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.
EF4166 to 200 mph
Devastating damage. Well-built houses leveled, structures with weak foundations moved some distance, cars thrown and large missiles generated.
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.
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 1, 2017
Touchdown: 2:31 AM EST (07:31 UTC)
Lifted: 2:39 AM EST (07:39 UTC)
On the ground: 8 minutes
Path length: 6.9 miles (11.1 km)
Path width: 250 yards (229 m)
Deaths: 0
Injuries: 0
Property damage: $30,000
County: Highland County
Touchdown point: 39.299, -83.597
Lift-off point: 39.321, -83.471
Record number: 1703010131-01

What the Weather Service recorded

An unseasonably warm and moist air mass was in place across the region during the morning hours of March 1st. Showers and thunderstorms developed across the Ohio Valley during the early morning hours as a strong low pressure system lifted northeast into the Great Lakes region. These storms produced heavy rain, large hail and several tornadoes. A squall line then moved through the region during the mid morning hours ahead of an approaching cold front. These storms resulted in damaging winds and additional heavy rain.

Damage was first observed at a farm residence on the north side of Larkin Road, where one tree was downed and a barn was destroyed. Northeast of there, some minor tree damage was seen on State Route 72 and along tree lines in adjacent fields.||Structural damage occurred at a property on US Route 62 near the intersection with Old US 62, with several outbuildings destroyed or heavily damaged. The house at this location had minor damage, mainly to roofing materials, with shingles removed on multiple sides. One large evergreen tree was uprooted and other trees were snapped. At another property slightly northeast on US Route 62, a garage was destroyed and numerous trees behind the garage were snapped.||On Leaverton Road, a barn was partially collapsed. Two evergreen trees were also snapped and other tree damage was observed both at this location and across the field to the east. Slightly south of this location, also on Leaverton Road, several trees were downed along a low spot on the road and a fence was blown flat. Minor tree damage was also observed where the tornado crossed Smith Road and a garage door was blown in at a residence on State Route 771 with some trees snapped in the vicinity. A few trees were also damaged where the tornado crossed Monroe Road.||Tree damage was observed to be significant in several locations along Milner Road. A house on Milner Road sustained siding damage to both the east and west sides of the structure and tree damage was extensive at this property. An adjacent modular home had its roof removed and other outbuildings were damaged, with debris thrown northeast across an adjacent field. ||A hay barn on Bridges Road had most of its top half removed with the top also removed from another adjacent outbuilding. A home on Big Oak Road had part of its roof removed with debris observed in an adjacent field, likely a result of damage further to the west.||The last observed damage from this tornado occurred along Cope Road, where an outbuilding was mostly destroyed and a garage had part of its roof removed. Debris was thrown across Cope Road into a field to the east and southeast.

The tornado initially touched down near a residence north of the intersection of State Route 138 and Hardins Creek Road where a tree was downed. Further north along State Route 138, several trees were snapped. On Road T-319A, a small unanchored shed was completely removed from its slab, and a barn had part of its roof removed on both its northwest and southeast sides. In addition, some trees in this area were snapped.||The next observed damage was along State Route 753 about one mile north of the bridge over Rattlesnake Creek, where several trees were snapped. A slightly more concentrated area of tree damage was observed on Paint Creek Road just to the west of Paint Creek. Some tall trees were snapped and sheet metal debris from earlier damage was also found along Paint Creek Road.||To the west of Paint Creek in Ross County, no further damage was observed.

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. One was issued for the county at another hour that day.

Issued (UTC)	Expired	Product	Office
16:21 UTC	15:26 UTC	Flash Flood Watch	ILN
07:22 UTC	14:57 UTC	Flash Flood Warning	ILN
07:34 UTC	07:48 UTC	Tornado Warning	ILN
07:40 UTC	10:57 UTC	Tornado Watch	ILN
08:18 UTC	14:15 UTC	Flash Flood Warning	ILN
10:57 UTC	13:52 UTC	Tornado Watch	ILN
12:22 UTC	12:45 UTC	Severe Thunderstorm Warning	ILN
12:43 UTC	13:09 UTC	Severe Thunderstorm Warning	ILN
14:44 UTC	17:45 UTC	Flood Warning	ILN
21:01 UTC	09:00 UTC	Wind Advisory	ILN

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 05:42 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.

What forecasters said that day

The local office's own words before the tornado touched down, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Wilmington, OH wrote its last area forecast discussion before the tornado touched down at Mar 1, 1:25 AM EST, 1 hour 6 minutes earlier.

Area forecast discussion, Mar 1, 1:25 AM EST, 1 hour 6 minutes before

Area Forecast Discussion
National Weather Service Wilmington OH
125 AM EST Wed Mar 1 2017

.SYNOPSIS...
Several rounds of showers and thunderstorms will be possible
through Wednesday afternoon, as a warm front moves into the area
later today, and a cold front crosses the region tomorrow. Some
of these storms may be severe, and some of them may produce
heavy rain. Behind the cold front, cooler air will move into the
region for the rest of the week. A low pressure system will
bring a chance of snow on Thursday night, with dry weather
expected for Friday and Saturday.

&&

.NEAR TERM /UNTIL 6 AM THIS MORNING/...
Little change to previous thinking. Area is in a lull. But first
cluster thunderstorms in western Indiana will spread northeast
into the forecast area after 04Z and track across the northern
counties. Meanwhile another cluster near Memphis is forecast to
move northeast into the Tri-State around 06-07Z. Shear remains
highly favorable and will only become more pronounced overnight.
Thermodynamics will become more favorable as well as higher
theta-e air continues to get drawn into the region. All modes
of severe weather remain possible overnight including flash
flooding. Southern counties that saw a good deal of rain during
the day will be especially vulnerable to the flash flood threat.

&&

.SHORT TERM /6 AM THIS MORNING THROUGH 6 PM THURSDAY/...
Models are somewhat unclear on how much of a break there will be
between the two potential rounds of severe convection -- the
initial round of storms during the overnight hours, and the
linear convection during the early to mid morning. Nonetheless,
there is good model agreement on a squall line / broken line /
QLCS developing along a pre-frontal trough. Before discussing
the line, it is important to note the changes to the environment
in front of it. Behind the initial cluster of convection,
boundary layer flow is expected to veer slightly and increase in
strength, which should allow for a slight bit of low-level
mixing (thus allowing instability to become more purely surface
based). Despite this, the preceding convection may disrupt the
thermodynamic profile aloft, leading to slightly weaker overall
CAPE values in advance of the next round of convection. Wind
flow will remain strong overall, though with slightly weaker
low-level directional shear. Thus, with the second round of
convection, the threat should shift toward damaging winds being
the most significant problem, with a secondary risk of QLCS
tornadoes or marginally severe hail. This risk will continue
through the morning from WNW-to-ESE across the ILN CWA, as the
convection moves forward. The SPC Day 2 outlook includes an ENH
risk ahead of this activity, with convection expected to clear
the forecast area during the late morning or early afternoon.
Heavy rain is certainly possible with these storms as well, but
they should be generally progressive, meaning that an additional
flash flood risk on Wednesday morning may be conditional on
where previous heavy rains have fallen.

Non-diurnal temperatures are an obvious necessity through the
forecast period, and depending on convective timing, the
temperature gradient across the ILN CWA from NW-to-SE by
mid-day Wednesday could be as much as 10-15 degrees.
Temperatures will fall more significantly Wednesday night, and
as a weak wrap-around trough moves through the Great Lakes
early Thursday morning, some light rain or snow showers will be
possible -- mainly north of I-70.

One final concern to mention is that synoptic-scale winds near
and behind the cold frontal passage on Wednesday could be gusty.
This forecast represents a significant increase from the
previous run, with gusts in the 30-35 knot range on Wednesday
afternoon. In fact, a few models (using BUFKIT momentum
transfer) suggest that gusts in the northern CWA may approach 40
knots. This may have to be looked into a little more closely
once the current weather threats have passed.

&&

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
A return to colder and more winter-like weather is expected during
the immediate long term forecast.

A clipper-like system is still forecast to dive southeast into the
Great Lakes and Ohio Valley Thursday into Thursday night. This will
bring a chance of rain and snow to the region. Precipitation chances
will be highest across the north and will also transition to all
snow overnight Thursday as temperatures fall.

Colder temperatures are in the offing on Friday in the wake of the
weather system as skies becoming partly cloudy. Highs will mostly
be in the 30s.

A ridge of high pressure will quickly push through the region early
Friday night.  Mid level ridging and WAA will be on the surface
ridges heels, which will bring some clouds and a low chance of snow
across the north.

Warmer weather will return for the upcoming weekend as low level
return southerly flow and mid level ridging take hold.

Next main weather system is expected to push through the region
Monday/Tuesday. Temperatures will warm into the 60s with the threat
for showers and thunderstorms increasing Monday/Monday night ahead
of low pressure and a cold front.

&&

.AVIATION /06Z WEDNESDAY THROUGH SUNDAY/...
Cluster of thunderstorms has overspread southwest Ohio and
should continue to work its way northeastward over the next
couple of hours. This will lead to fairly persistent
thunderstorms through the predawn hours, especially at the
southern TAF sites. This will result in MVFR to IFR cigs and
vsbys through the first part of the TAF period. Meanwhile, the
convective line associated with the cold front is sagging down
across central Illinois into northwest Indiana, and this should spread
across the TAF sites through mid morning. Given the good
dynamics in place across the region, gusty winds in excess of 40
knots will be possible with some of the thunderstorms through
the morning hours. The cold front will push southeast late this
morning and into early afternoon with pcpn tapering off behind
it. The gradient winds will increase behind the front with gusts
in excess of 30 knots possible into tonight.

OUTLOOK...MVFR ceilings and visibilities will be possible
Thursday night into Friday morning.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...Flash Flood Watch through this afternoon for OHZ060>065-
     070>074-077>082-088.
KY...Flash Flood Watch through this afternoon for KYZ089>100.
IN...Flash Flood Watch through this afternoon for INZ058-059-066-
     073>075-080.

&&

SYNOPSIS...Hatzos
NEAR TERM...
SHORT TERM...Hatzos
LONG TERM...Hickman
AVIATION...JGL

Hazardous weather outlook, Feb 28, 11:58 AM EST, 14 hours 33 minutes before

Hazardous Weather Outlook
National Weather Service Wilmington OH
1158 AM EST Tue Feb 28 2017

KYZ099-100-OHZ073-074-079>082-088-011700-
Mason-Lewis-Ross-Hocking-Brown-Highland-Adams-Pike-Scioto-
1158 AM EST Tue Feb 28 2017

...FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY AFTERNOON...

This Hazardous Weather Outlook is for Northeast Kentucky, Northern
Kentucky, Central Ohio and Southwest Ohio.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

In addition to a heavy rain and flash flood threat, the threat for
severe thunderstorms will increase overnight...mainly after 1 A.M.
Several waves of thunderstorms will cross the area later tonight.
These storms will have a damaging wind and large hail threat first
and foremost, and also a chance for an isolated tornado.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

Thunderstorms will continue to cross the area Wednesday
morning...ending around noon. In addition to a heavy rain and flash
flood threat, these storms may also have a damaging wind and large
hail threat. A tornado cannot be ruled out during the morning hours
as well.

Wind gusts of 30 to 40 mph will be possible Wednesday afternoon
behind the surface cold front.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed later tonight and through the
morning on Wednesday.

OHZ026-034-035-043>046-052>056-062>065-072-011700-
Hardin-Mercer-Auglaize-Shelby-Logan-Union OH-Delaware-Champaign-
Clark-Madison-Franklin OH-Licking-Greene-Fayette OH-Pickaway-
Fairfield-Clinton-
1158 AM EST Tue Feb 28 2017

This Hazardous Weather Outlook is for Central Ohio, Southwest Ohio
and West Central Ohio.

.DAY ONE...This Afternoon and Tonight.

In addition to a heavy rain and localized flood threat that
accompanies any showers and thunderstorms, the threat for severe
thunderstorms will increase overnight...mainly after 1 A.M. Several
waves of thunderstorms will cross the area later tonight. These
storms will have a damaging wind and large hail threat first and
foremost, and also a chance for an isolated tornado.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Thunderstorms will continue to cross the area Wednesday
morning...ending around noon. In addition to a heavy rain and flash
flood threat, these storms may also have a damaging wind and large
hail threat. A tornado cannot be ruled out during the morning hours
as well.

Wind gusts of 30 to 40 mph will be possible Wednesday afternoon
behind the surface cold front.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed later tonight and Wednesday morning.

INZ050-058-059-066-OHZ042-051-060-061-070-071-011700-
Wayne-Fayette IN-Union IN-Franklin IN-Darke-Miami-Preble-Montgomery-
Butler-Warren-
1158 AM EST Tue Feb 28 2017

This Hazardous Weather Outlook is for East Central Indiana,
Southeast Indiana, Southwest Ohio and West Central Ohio.

.DAY ONE...This Afternoon and Tonight.

Several waves of showers and thunderstorms will overspread the area
tonight. Severe thunderstorms appear likely...with the primary
threat being damaging winds and large hail. A few tornadoes will also
be possible. In addition, heavy rain will also be possible, leading
to the potential for localized flooding.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Thunderstorms will continue to cross the area Wednesday
morning...ending by noon. In addition to a heavy rain and localized
flood threat, these storms may also have a damaging wind and large
hail threat. The tornado threat will continue into the morning hours
as well.

Wind gusts of 30 to 40 mph will be possible Wednesday afternoon
behind the surface cold front.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed later tonight into Wednesday
morning.

INZ073>075-080-KYZ089>098-OHZ077-078-011700-
Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone-Kenton-
Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Hamilton-Clermont-
1158 AM EST Tue Feb 28 2017

...FLASH FLOOD WATCH IN EFFECT THROUGH WEDNESDAY AFTERNOON...

This Hazardous Weather Outlook is for Southeast Indiana, Northern
Kentucky and Southwest Ohio.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

Showers and thunderstorms this afternoon will contain a localized
heavy rain and flash flooding threat, as well as small hail.

More widespread thunderstorm activity is expected after midnight
tonight, and some of these storms will likely be severe. The primary
threats will be large hail and damaging winds, though a few tornadoes
will be possible as well.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

Wednesday morning showers and thunderstorms will continue across the
area, ending by noon. The threat for severe weather will continue on
Wednesday morning with damaging wind and large hail being the primary
threats. A tornado or two will remain possible through the morning
hours on Wednesday.

Wind gusts of 30 to 40 mph will be possible Wednesday afternoon
behind the surface cold front.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed later tonight and Wednesday
morning.

Binau

In the hours before

Local storm report, Mar 1, 2:07 AM EST, 24 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
207 AM EST WED MAR 01 2017

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

0204 AM     HEAVY RAIN       2 NNW FINNEYTOWN        39.25N 84.52W
03/01/2017  M1.02 INCH       HAMILTON           OH   TRAINED SPOTTER

            IN 1 HOUR

&&

Local storm report, Mar 1, 2:10 AM EST, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
210 AM EST WED MAR 01 2017

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

0208 AM     FLASH FLOOD      NORWOOD                 39.16N 84.45W
03/01/2017                   HAMILTON           OH   EMERGENCY MNGR

            MULTIPLE FLOODED AND CLOSED ROADWAYS, INCLUDING
            MONTGOMERY RD NEAR SANKER RD AND NEAR SANCTION AND
            MONTGOMERY RDS.

&&

KC

Special weather statement, Mar 1, 2:10 AM EST, 21 minutes before

Special Weather Statement
National Weather Service Wilmington OH
210 AM EST WED MAR 1 2017

OHZ078>081-010745-
Clermont OH-Highland OH-Adams OH-Brown OH-
210 AM EST WED MAR 1 2017

...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN CLERMONT...CENTRAL
BROWN...NORTHERN ADAMS AND SOUTHERN HIGHLAND COUNTIES UNTIL 245 AM
EST...

At 210 AM EST, radar indicated a strong thunderstorm over Felicity,
moving northeast at 75 mph.

STORM HAZARDS INCLUDE...
Winds to 40 mph...
Penny size hail...
Frequent cloud-to-ground lightning...
Very heavy rain...

Locations impacted include...
Georgetown, Mount Orab, Bethel, Peebles, Winchester, Marshall,
Sardinia, Seaman, Felicity, Belfast, Emerald, Russellville,
Hamersville, Mowrystown, Cherry Fork, Chilo, Saltair, May Hill,
Locust Grove and Point Isabel.

Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

Residents in these areas should remain alert. If this storm becomes
stronger, then a warning may be needed.

LAT...LON 3879 8415 3892 8420 3918 8347 3906 8339
      3905 8332 3901 8327 3896 8327 3877 8408
TIME...MOT...LOC 0710Z 246DEG 70KT 3884 8406

Binau

Special weather statement, Mar 1, 2:11 AM EST, 20 minutes before

Special Weather Statement
National Weather Service Wilmington OH
211 AM EST WED MAR 1 2017

OHZ062-063-071-072-079-080-010745-
Highland OH-Brown OH-Warren OH-Fayette OH-Clinton OH-Greene OH-
211 AM EST WED MAR 1 2017

...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BROWN...
SOUTHWESTERN FAYETTE...CLINTON...SOUTHEASTERN GREENE AND NORTHWESTERN
HIGHLAND COUNTIES UNTIL 245 AM EST...

At 211 AM EST, radar indicated a strong thunderstorm near
Blanchester, moving northeast at 70 mph.

STORM HAZARDS INCLUDE...
Winds to 40 mph...
One half inch diameter hail...
Frequent cloud-to-ground lightning...

Locations impacted include...
Washington Court House, Wilmington, Hillsboro, Blanchester, Sabina,
Lynchburg, Leesburg, New Vienna, Russell, Staunton, Clarksville,
Martinsville, Fayetteville, Midland, Bowersville, Highland, Port
William, St. Martin, Milledgeville and Melvin.

This includes I-71 in Ohio between mile markers 42 and 62.

Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3911 8401 3925 8399 3926 8401 3948 8400
      3960 8373 3959 8340 3923 8351
TIME...MOT...LOC 0711Z 245DEG 63KT 3936 8393

Hatzos

Special weather statement, Mar 1, 2:21 AM EST, 10 minutes before

Special Weather Statement
National Weather Service Wilmington OH
221 AM EST WED MAR 1 2017

INZ074-KYZ091-OHZ070-077-010745-
Dearborn IN-Boone KY-Hamilton OH-Butler OH-
221 AM EST WED MAR 1 2017

...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL DEARBORN...NORTHERN
BOONE...CENTRAL HAMILTON AND SOUTHEASTERN BUTLER COUNTIES UNTIL 245
AM EST...

At 221 AM EST, radar indicated a strong thunderstorm over Shawnee,
moving northeast at 65 mph.

STORM HAZARDS INCLUDE...
Winds to 40 mph...
Penny size hail...
Very heavy rain...

Locations impacted include...
Cincinnati, Fairfield, Norwood, Forest Park, Sharonville, Blue Ash,
Springdale, Reading, Montgomery, North College Hill, Madeira,
Wyoming, Cheviot, Mount Healthy, Deer Park, Lawrenceburg, Greendale,
Aurora, Finneytown and Hidden Valley.

This includes the following Interstates...
 I-71 in Ohio between mile markers 4 and 5, and between mile markers
7 and 19.
 I-74 in Ohio between mile markers 8 and 19.
 I-75 in Ohio between mile markers 3 and 24.

Water will pond on roads and may quickly fill roadside ditches and
small streams.

Residents in these areas should remain alert. If this storm becomes
stronger, then a warning may be needed.

To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.

LAT...LON 3938 8435 3929 8435 3929 8433 3923 8431
      3922 8432 3921 8431 3921 8430 3919 8430
      3903 8487 3911 8492
TIME...MOT...LOC 0721Z 244DEG 54KT 3911 8480

Binau

Local storm report, Mar 1, 2:24 AM EST, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE WILMINGTON OH
224 AM EST WED MAR 01 2017

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

0216 AM     HEAVY RAIN       MIAMITOWN               39.21N 84.70W
03/01/2017  M2.28 INCH       HAMILTON           OH   PUBLIC

            TOTAL RAINFALL IN LAST 24 HOURS.

&&

KC

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.

Cncnati-Daytn, OH (KILN), 00:00Z

7.5 hours before the tornado, 26 km from the path. March 1, 2017.

Skew-T log-p

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.

Hodograph

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: 126 J/kg
Mixed-layer CIN: -51 J/kg
Surface CAPE: 0 J/kg
Mixed-layer LCL: 490 m above ground
0-6 km bulk shear: 54 kt
0-1 km bulk shear: 39 kt
0-1 km storm-relative helicity: 416 m²/s²
0-3 km storm-relative helicity: 441 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7
0-3 km lapse rate: 4.6 K/km

Open this sounding in Storm Lab

Cncnati-Daytn, OH (KILN), 12:00Z

4.5 hours after it, 26 km from the path. March 1, 2017.

Skew-T log-p

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.

Hodograph

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: -91213 J/kg
Surface CAPE: 9 J/kg
Mixed-layer LCL: 777 m above ground
0-6 km bulk shear: 96 kt
0-1 km bulk shear: 16 kt
0-1 km storm-relative helicity: -229 m²/s²
0-3 km storm-relative helicity: 525 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0
0-3 km lapse rate: 4.8 K/km

Open this sounding in Storm Lab

The radar

The Cincinnati radar (KILN), 28 km away, was scanning. The volume nearest the touchdown began at 07:33 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)	Report	Where	County	Remark
04:53 UTC	HEAVY RAIN 1.18	Goshen	Clermont, OH	24-HR TOTAL RAINFALL.
07:25 UTC	TSTM WND DMG	4 Sse New Vienna	Highland, OH	TREES DOWN. LARGE BRANCHES ON BARN. SOME SHINGLES OFF OF HOUSE ROOF.
07:31 UTC	TORNADO 0	2 Sse Leesburg	Highland, OH	NWS STORM SURVEY CONFIRMS AN EF0 TORNADO SOUTH OF LEESBURG IN HIGHLAND COUNTY. A FEW HOMES HAD MINOR DAMAGE AND SEVERAL BARNS AND OUTBUILDINGS WERE MORE SIGNIFICANTLY DAMAGED. TREES WERE SNAPPED ALONG MUCH OF THE TORNADO
07:35 UTC	TSTM WND DMG	3 Sse Leesburg	Highland, OH	HOUSE DESTROYED. POSSIBLE TORNADO. TIME ESTIMATED.
07:40 UTC	TORNADO 0	5 Ssw Greenfield	Highland, OH	NWS STORM SURVEY CONFIRMS AN EF0 TORNADO SOUTH OF GREENFIELD IN HIGHLAND COUNTY. THIS TORNADO CAUSED GENERALLY MINOR TREE DAMAGE.
08:00 UTC	TSTM WND DMG	2 Ssw Clarksburg	Ross, OH	LARGE ROOF SECTIONS AND SIDING STRIPPED FROM BARN. FENCE ALSO FLATTENED.
08:04 UTC	TSTM WND GST 58	Krzt Chillicothe Apt	Ross, OH

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

This ground now

The live radar over the track Every 2017 tornado in Ohio Every tornado in Ohio since 1950 Warnings in force in Ohio now The forecast where you are

The other tornadoes of March 1, 2017

38 more were confirmed in the United States that day.

Date	Time	Rating	Where	Path (mi)	Width (yd)	Injuries	Damage
March 1	12:30 AM CST	EF0	Dallas, MO	1.0	100		$25,000
March 1	12:35 AM CST	EF1	Butler, KY	0.8	90		$50,000
March 1	1:29 AM CST	EF1	Johnson, AR	0.1	200		$20,000
March 1	2:40 AM EST	EF0	Highland, OH	4.5	100		$10,000
March 1	2:16 AM CST	EF1	Conway, AR	1.0	250		$30,000
March 1	2:18 AM CST	EF0	Conway, AR	1.1	50		$40,000
March 1	2:33 AM CST	EF1	Cleburne, AR	3.9	250		$20,000
March 1	3:38 AM EST	EF1	Clermont, OH	6.4	150		$400,000
March 1	3:13 AM CST	EF1	Jackson, AR	4.2	200		$30,000
March 1	3:20 AM CST	EF1	Jackson, AR	1.6	125		$100,000
March 1	5:00 AM EST	EF2	Daviess, IN	0.1	30		$40,000
March 1	5:05 AM EST	EF2	Daviess, IN	1.5	30		$65,000
March 1	4:08 AM CST	EF0	Jackson, IL	4.1	25		$2,000
March 1	5:10 AM EST	EF1	Daviess, IN	0.0	30		$35,000
March 1	5:30 AM EST	EF1	Lawrence, IN	0.2	40		$22,000
March 1	5:37 AM EST	EF2	Lawrence, IN	0.7	25	1	$175,000
March 1	4:40 AM CST	EF1	Mississippi, MO	15.2	200		$400,000
March 1	5:41 AM EST	EF1	Washington, IN	5.8	100		$150,000
March 1	5:45 AM EST	EF2	Jackson, IN	0.3	50		$45,000
March 1	4:51 AM CST	EF0	Dyer, TN	3.7	50		$50,000
March 1	6:04 AM EST	EF1	Clark, IN	0.3	20		$200,000
March 1	6:05 AM EST	EF1	Scott, IN	2.1	125	10	$250,000
March 1	5:25 AM CST	EF2	Graves, KY	1.6	200		$170,000
March 1	6:36 AM EST	EF1	Henry, KY	1.1	200		$100,000
March 1	7:03 AM EST	EF0	Hamilton, OH	1.1	350		$250,000
March 1	7:39 AM EST	EF1	Highland, OH	2.2	150		$50,000
March 1	6:57 AM CST	EF1	Logan, KY	1.6	75		$100,000
March 1	7:00 AM CST	EF1	Williamson, TN	10.5	250		$7.3 million
March 1	8:16 AM EST	EF1	Pike, OH	0.6	125		$30,000
March 1	7:17 AM CST	EF0	Davidson, TN	3.1	100		$55,000
March 1	7:24 AM CST	EF1	Warren, KY	2.6	125		$250,000
March 1	7:37 AM CST	EF0	Wilson, TN	3.3	100		$15,000
March 1	7:40 AM CST	EF1	Wilson, TN	7.2	200		$110,000
March 1	7:51 AM CST	EF1	Smith, TN	3.9	200		$40,000
March 1	8:04 AM CST	EF1	Putnam, TN	7.6	150		$25,000
March 1	9:07 AM EST	EF1	Meigs, OH	0.1	300		$80,000
March 1	8:35 AM CST	EF1	Putnam, TN	0.1	90		$10,000
March 1	4:27 PM EST	EF1	Murray, GA	2.9	150		$100,000

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.