EF1 tornado, Turpentine to Umatilla, Florida, September 10, 2017

1. EF065 to 85 mph

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

2. EF186 to 110 mphthis tornado

   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.

Rating

EF1

Date

September 10, 2017

Touchdown

6:28 PM EDT (22:28 UTC)

Lifted

6:30 PM EDT (22:30 UTC)

On the ground

2 minutes

Path length

3.8 miles (6.2 km)

Path width

500 yards (457 m)

Deaths

0

Injuries

0

County

Lake County

Touchdown point

28.939, -81.624

Lift-off point

28.935, -81.687

Record number

1709101628-01

Hurricane Irma moved northward over the far western Florida peninsula between the afternoon of September 10 and the morning of September 11 at Category 1-2 strength. During the closest point of approach to east-central Florida during the early morning hours of September 11, rain bands associated with the inner core elongated west-to-east and lifted through northwest Osceola County, Lake County and western Orange County. Due to the large size of the wind field, a long duration of damaging tropical storm force winds with gusts to hurricane force was experienced across all of east-central Florida. There were no direct hurricane-related fatalities, however 10 indirect fatalities occurred during the evacuation and recovery phases of the hurricane. Preliminary damage estimates across east central Florida exceeded $1.3 billion.||A storm surge of 2-3 feet affected the coast of Martin, St. Lucie and Indian River Counties, and 3-4 feet of storm surge impacted the coast of Brevard and Volusia Counties. Moderate to major beach erosion occurred along the entire east-central Florida coastline. Water levels rose within the coastal lagoon system generally rose between 1 and 3 feet (although locally up to 4.5 feet within a few constricted areas of the lagoon, primarily within north Brevard and Volusia Counties) due to coastal surge and run-off from heavy rain and slow drainage to the Atlantic through the inlets. River flooding caused to enter some homes adjacent to the Halifax River, primarily in Ormond Beach, Holly Hill and north Daytona Beach. Many docks and boat houses along the Indian, Banana and Halifax Rivers were damaged from the combination of high water and wave action. ||Rainfall totals of 10-15 inches were widespread across east-central Florida. The highest totals occurred in a swath from northern St. Lucie County to far southern Indian River County, where accumulations reached 15 to nearly 22 inches. A significant portion of this rain fell during the early morning hours of September 10 as excessive rain bands trained onshore ahead of the main rain area associated with Hurricane Irma. Flooding entered several homes and many roadways became impassible. Hurricane rain bands also resulted in flooding of homes and roadways in many other areas later on September 10, including Fellsmere (Indian River County) where a dozen people were rescued from flood waters and north Merritt Island (Brevard County) where water approached or entered several homes. During the early morning hours of September 11, flooding breached several hundred homes and resulted in the rescue of 200 residents in Orlo Vista (Orange County) when a lake and adjacent retention ponds overflowed. ||Widespread heavy rain fell within the St. Johns River basin and caused the entire river (from Cocoa in Brevard County to Astor in Lake County) to reach flood stage. The Astor area was the first to reach flood stage during the afternoon of September 10, then Cocoa very early on September 11 and Lake Harney that evening, Deland very early on September 12 and Sanford very late on September 14. All points along the river eventually reached moderate to major flood stage, impacting adjacent homes, structures, property and roadways. The river remained in flood for well over one month. ||Ten tornadoes were confirmed, including eight within Brevard County (one EF-0, six EF-1, and one EF-2), one in Volusia County (EF-1) and one in Lake County (EF-1). Additional tornadoes likely occurred, however it was impossible to distinguish weak, short track tornado damage from the overall widespread, background wind damage of similar velocities.

A NWS storm survey revealed an EF-1 tornado with estimated wind speeds between 95 and 100 mph developed near East 8th Avenue in Umatilla, uprooting and snapping several trees in an open field. The tornado moved toward a residential neighborhood between East 8th Avenue and East Collins Street and peeled back the roofs from several homes and uprooted numerous trees. Damage continued into North Lake Community Park where a scoreboard was toppled and three power poles were snapped. The tornado moved across Lake Pearl and into the Olde Mill RV resort where it destroyed approximately ten recreational vehicles and damaged at least 25 others. The tornado continued west toward downtown Umatilla and damaged the roofs of the Umatilla Inn, an elementary school, and a home on Babb Road. DI24, DOD4, LB-EXP; DI28, DOD4, LB-EXP; DI3, DOD7, LB.

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

13 minutes of warning. NWS MLB issued a tornado warning for this county at 22:15 UTC, 13 minutes before the tornado touched down, in force until 22:45 UTC.

The county was under a tornado watch, issued at 16:04 UTC and running to 03:51 UTC.

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 Storm Prediction Center had this point in a Slight Risk, with a 0.05 chance of a tornado within 25 miles. The outlook in force was issued at 19:42 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.

NWS Melbourne, FL wrote its last area forecast discussion before the tornado touched down at Sep 10, 12:48 PM EDT, 5 hours 40 minutes earlier.

Area Forecast Discussion
National Weather Service Melbourne FL
1248 PM EDT Sun Sep 10 2017

...Torrential rain with an increasing wind and tornado threat
spreading northward over east central Florida...

.DISCUSSION...
Major Hurricane Irma continues its northward motion this morning,
exhibiting a 20 nautical mile wide eye on KBYX (Key West) radar.
The center is forecast to move up the west coast, placing all of
east central Florida in the northeastern quadrant of the storm.
The large wind field associated with the storm will produce far-
reaching effects, and a period of damaging winds with gusts to
hurricane force is still expected late this afternoon and into
early Monday morning.

The outer rainbands of Irma will continue to spread north and east
this morning, increasing in both coverage and intensity. The CDO
(central dense overcast) will move in late this afternoon and into
tonight, producing a more widespread wind and heavy rainfall
event (with a lower, but non-zero, threat of TC tornadoes).

NOW IS THE TIME TO REMAIN IN YOUR SAFE SHELTER! Residents and visitors
to east central Florida are strongly encouraged to monitor the latest
products issued by your local National Weather Service Office.

PLEASE REFER TO THE LATEST TCV AND HLS PRODUCTS FOR THE LATEST
INFORMATION CONCERNING THREATS AND IMPACTS PERTAINING TO IRMA.

&&

.AVIATION...
Deteriorating conditions expected through the next 24 hours as
Irma closes in on Florida. Multiple TEMPO groups through the
forecast with onshore-moving showers from the Atlantic. On and off
showers will continue early this afternoon with steadier rain
settling in this evening and overnight. MVFR conditions will
deteriorate toward IFR criteria by this evening, especially for
terminals across the Treasure Coast. Winds will continue to
increase through the day as the eye of Irma moves across the
western half of Florida.

&&

.MARINE...
Today-Tonight...Hurricane Warnings remain in effect for the
coastal waters of east Central Florida as Major Hurricane Irma
churns through the Florida Keys and into the southwestern portion
of the peninsula. East to southeast winds will increase to 35-45
knots through the day as wave heights build to 15-25 feet. Winds
will gradually diminish from south to north by later tonight as
seas also slowly subside. Nonetheless, dangerous conditions will
continue through the night with wave heights remaining in the
10-15 foot range by Monday morning.

Monday-Wednesday...Gusty south/southwest winds will diminish in
the wake of Irma through the day on Monday as seas further
subside through midweek.

&&

.PRELIMINARY POINT TEMPS/POPS...
DAB  82  77  86  72 / 100 100  80  20
MCO  79  75  84  73 / 100 100  70  20
MLB  86  79  89  74 / 100 100  70  20
VRB  85  79  90  74 / 100 100  60  20
LEE  80  76  83  73 / 100 100  90  20
SFB  80  77  84  73 / 100 100  70  20
ORL  80  76  84  73 / 100 100  70  20
FPR  86  79  90  74 / 100 100  50  20

&&

.MLB WATCHES/WARNINGS/ADVISORIES...
FL...Flood Watch through Monday evening for Coastal Volusia County-
     Indian River-Inland Volusia County-Martin-Northern Brevard
     County-Northern Lake County-Okeechobee-Orange-Osceola-
     Seminole-Southern Brevard County-Southern Lake County-St.
     Lucie.

     Tornado Watch until midnight EDT tonight for Coastal Volusia
     County-Indian River-Inland Volusia County-Martin-Northern
     Brevard County-Northern Lake County-Okeechobee-Orange-
     Osceola-Seminole-Southern Brevard County-Southern Lake
     County-St. Lucie.

     Hurricane Warning for Coastal Volusia County-Indian River-Inland
     Volusia County-Martin-Northern Brevard County-Northern Lake
     County-Okeechobee-Orange-Osceola-Seminole-Southern Brevard
     County-Southern Lake County-St. Lucie.

AM...Tornado Watch until midnight EDT tonight for Flagler Beach to
     Volusia-Brevard County Line 0-20 nm-Flagler Beach to
     Volusia-Brevard County Line 20-60 nm-Sebastian Inlet to
     Jupiter Inlet 0-20 nm-Sebastian Inlet to Jupiter Inlet 20-
     60 nm-Volusia-Brevard County Line to Sebastian Inlet 0-20
     nm-Volusia-Brevard County Line to Sebastian Inlet 20-60 nm.

     Hurricane Warning for Flagler Beach to Volusia-Brevard County
     Line 0-20 nm-Flagler Beach to Volusia-Brevard County Line
     20-60 nm-Sebastian Inlet to Jupiter Inlet 0-20 nm-Sebastian
     Inlet to Jupiter Inlet 20-60 nm-Volusia-Brevard County Line
     to Sebastian Inlet 0-20 nm-Volusia-Brevard County Line to
     Sebastian Inlet 20-60 nm.

&&

Ulrich/Pendergrast/Combs/Rodriguez/Kelly/Glitto/Blottman/Volkmer

In the hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
558 PM EDT SUN SEP 10 2017

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

0545 PM     TROPICAL STORM   5 N EDGEWATER           29.05N 80.90W
09/10/2017                   VOLUSIA            FL   MESONET

            WXFLOW SITE XNSB MEASURED WIND GUST OF 19KT/56MPH FROM
            ENE. SUSTAINED GUSTS OF 38KT/44MPH.

&&

KR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
609 PM EDT SUN SEP 10 2017

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

0549 PM     TROPICAL STORM   3 SSE GIFFORD           27.63N 80.39W
09/10/2017                   INDIAN RIVER       FL   MESONET

            WEATHERFLOW SITE XVER IN VERO BEACH REPORTED A PEAK WIND
            GUST OF 60MPH/52KT FROM THE EAST-SOUTHEAST.

&&

KR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
610 PM EDT SUN SEP 10 2017

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

0545 PM     TROPICAL STORM   4 WNW CAPE CANAVERAL    28.40N 80.66W
09/10/2017                   BREVARD            FL   MESONET

            52 MPH/45 KT GUST FROM THE EAST AT WXFLOW SITE XMER WITH
            SUSTAINED 40 MPH/35 KT.

&&

JC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
612 PM EDT SUN SEP 10 2017

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

0552 PM     TROPICAL STORM   3 SW CAPE CANAVERAL     28.36N 80.65W
09/10/2017                   AMZ552             FL   MESONET

            60 MPH/52 KT GUST FROM THE ENE AT WXFLOW SITE XCCB WITH
            44 MPH/38 KT SUSTAINED.

&&

JC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
615 PM EDT SUN SEP 10 2017

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

0602 PM     TROPICAL STORM   3 SSW COCOA BEACH       28.31N 80.63W
09/10/2017                   BREVARD            FL   MESONET

            56 MPH/49 GUST FROM THE ENE AT WXFLOW SITE XCOA WITH
            SUSTAINED 42 MPH/36 KT.

&&

JC

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
619 PM EDT SUN SEP 10 2017

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

0606 PM     TROPICAL STORM   5 N BAREFOOT BAY        27.96N 80.53W
09/10/2017                   AMZ552             FL   MESONET

            WXFLOW SITE XIND MEASURED A GUST OF 66 MPH/57 KT FROM THE
            ESE WITH SUSTAINED 47 MPH/41 KT.

&&

JC

The Melbourne radar (KMLB), 134 km away, was scanning. The volume nearest the touchdown began at 22:29 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.

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

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

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

15 more were confirmed in the United States that day.

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.

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