Aldie, Virginia

06/13/2013 0332 PM

2 miles E of Countryside, Loudoun County.

Thunderstorm wind damage, reported by public.


            Tree down along algonkian Parkway near Cascades
            Parkway.





06/13/2013 0332 PM

2 miles E of Countryside, Loudoun County.

Thunderstorm wind damage, reported by public.


            Tree down along algonkian Parkway near Cascades
            Parkway.





06/13/2013 0332 PM

1 miles W of Countryside, Loudoun County.

Thunderstorm wind damage, reported by Emergency Mngr.


            65-foot-tall 3-foot-diameter tree fell into a house on
            White Oak drive in Sterling... VA. Reported by Loudoun
            County emergency mgmt.

... Two long track EF-0 tornadoes now confirmed in Maryland from June 13th...

Additional investigations continue in Maryland and Virginia.
Additional tornado confirmations are possible.

A second EF-0 tornado was confirmed today in Saint Marys County
Maryland from the June 13th severe weather outbreak. This joins
the previously confirmed tornado in Montgomery County Maryland.

Additional information can be passed on to the National Weather
Service. These reports are still preliminary and may be adjusted
by additional information received. The Montgomery County segment
below has been refined by a slight westward revision of the
starting point.

The National Weather Service in Sterling expresses its
appreciation to those who assisted in conducting surveys and
provided information used during the surveys... including members
of the emergency management... Skywarn storm spotters... and members
of the public affected by these storms.

... Tornado confirmed in Montgomery County Maryland...

Location... North Potomac to Burtonsville in Montgomery County Maryland
date... June 13 2013
estimated time... 3:41 PM EDT to 3:59 PM EDT
maximum ef-scale rating... EF-0
estimated maximum wind speed... 75 mph
maximum path width... 150 yards
path length... 18.0 miles
beginning lat/Lon... 39.080n / 77.279w
ending lat/Lon... 39.108n / 76.947w
* fatalities... 0
* injuries... 0

* the information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS storm data.

... Summary...

Eyewitness accounts... radar imagery... and a ground survey concluded
a long track EF-0 tornado occurred in Montgomery County Maryland
on the afternoon of June 13th 2013. Peak winds were estimated at
75 mph. Damage was almost entirely from downed trees. In that
regard numerous homes and a few parked vehicles were damaged by
trees falling onto them. No injuries have been reported.

First consistent damage was noted along Bonnie Dale drive and
Glenhurst court and Road where several trees were downed in the
community. Also... near the intersection of Turkey Foot Road and
Jones Lane in southwest Montgomery County near North Potomac
Maryland a few large trees were over the Road. The tornado raced
east at nearly 60 mph to the northern section of Rockville Maryland.
At least 14 homes were significantly damaged by uprooted trees. As
it continued east to the Norbeck and Aspen Hill area 30 trees were
uprooted in the Manor Country Club Golf course as well as numerous
homes damaged in the surrounding communities from tree damage. Tree
damage was noted along the intercounty connector Route 200 at the
Layhill Road exit. Finally a few trees were downed in Spencerville
and Burtonsville.

Based on the damage, this tornado is rated EF-0, with estimated
wind speeds of 75 mph. The 18.0 mile damage path length was covered
in 18 minutes and had consistent small branch damage with
occasional areas with significant tree damage.

Additionally there was a parallel 7 miles path of damage through south
Rockville and Glenmont Maryland with similar tree damage. This
area was found to be straight line winds from the outflow just
south of the tornado from the parent supercell storm.

The National Weather Service would like to extend its thanks to Montgomery
County fire who confirmed the tornado on the ground during the storm
and Montgomery County emergency management who provided invaluable
assistance during the ground survey.

&&

... EF-0 tornado confirmed in St Marys County MD...

Location... Oakley to California in St Marys County Maryland
date... June 13 2013
estimated time... 3:24 PM to 3:42 PM EDT
maximum ef-scale rating... EF-0
maximum wind speed... 75 mph
maximum path width... 200 yards
length... 13.8 miles
beginning lat/Lon... 38.278n / 76.740w
ending lat/Lon... 38.309n / 76.488w
* fatalities... none
* injuries... none

* the information in this statement is preliminary and subject to change
pending final review of the event(s) and publication in NWS storm data.

... Summary...

A ground survey conducted by the National Weather Service... together
with radar data from the WSR-88D in Sterling VA and Andrews AFB
terminal Doppler weather radar determined there was a EF-0 tornado
that traversed nearly the entire width of Saint Marys County
Maryland. Damage was intermittent along the path and was confined
to tree damage and damage resulting from downed trees. Numerous
large trees were uprooted and some trees were topped. Many were
noted in the vicinity of Oakley Road and Hodges Road... between old
rolling Road and Joan drive and between shady mile drive and Town
Creek Road.

Thunderstorm wind damage also occurred across Coltons Point between
serenity Lane and Point Breeze Road. Many large trees were uprooted
in this area.