Long-track tornado confirmed in St. Mary’s County

The thunderstorm outbreak of one week ago today brought not just one rare long-track tornado to the region, but two. In addition to the 18-mile long Montgomery County shredder, a twister that ripped through southern Maryland carved a 14-mile path.

The St. Mary’s County tornado, 13.8 miles long to be precise, raced from Oakley to California between 3:24 and 3:42 p.m. Thursday, June 13, the National Weather Service reports. The twister’s peak winds reached 75 mph, classifying it an EF-0, the weakest designation on the Enhanced Fujita (EF) 0-5 scale.


(National Weather Service)

As the Montgomery County tornado was on the ground from 3:41 to 3:59 p.m., it would appear it was a rare occurrence of two simultaneous tornadoes in the state of Maryland, if only for a minute.

Like its Montgomery County counterpart, the St. Mary’s County tornado caused no direct structural damage, but inflicted its wrath on trees.

“Damage was intermittent along the path and confined to tree damage and damage resulting from downed trees,” the NWS storm survey reports. “Numerous large trees were uprooted and some trees were topped.”

Here’s the NWS storm survey, in its entirety, for the St. Mary’s County tornado:

…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.

Jason is currently the Washington Post’s weather editor. A native Washingtonian, Jason has been a weather enthusiast since age 10.
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Jason Samenow · June 20, 2013

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