National Weather Service United States Department of Commerce

Massive Heat Wave; Severe Storms and Heavy Rain

A massive heat wave is consuming much of the Midwest into the Southern tier of the U.S. with hazy, hot and humid conditions. These dangerous conditions will likely persist through Thursday as widespread excessive heat warnings and heat advisories are in effect. North and east of the heat and area of high pressure, thunderstorms with damaging and severe winds, large hail and heavy rain are likely. Read More >

 

 

NOUS41 KLWX 250101
PNSLWX
DCZ001-MDZ003>007-009>011-013-014-016>018-501-502-VAZ042-052>054-
250500-
DISTRICT OF COLUMBIA-WASHINGTON-FREDERICK MD-CARROLL-
NORTHERN BALTIMORE-HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-
PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-LOUDOUN-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
901 PM EDT SAT AUG 24 2013

...EF0 TORNADO CONFIRMED IN HARFORD COUNTY MARYLAND EARLY ON
AUGUST 13TH...

THE NWS CONDUCTED A GROUND SURVEY ON THE AFTERNOON OF AUGUST 13TH OF
DAMAGE REPORTED NEAR THE TRACK OF A SEVERE THUNDERSTORM THAT MOVED
ACROSS SOUTHERN HARFORD COUNTY MARYLAND EARLY ON THE MORNING OF THE
13TH.THE NATIONAL WEATHER SERVICE IN STERLING VA HAS CONFIRMED A
EF0 TORNADO TOUCHED DOWN BETWEEN BEL AIR AND ABINGDON MARYLAND...IN
HARFORD COUNTY...SHORTLY AFTER 6 AM EDT ON TUESDAY AUGUST 13 2013.

THE NATIONAL WEATHER SERVICE IN STERLING APPRECIATES THOSE WHO
ASSISTED IN CONDUCTING SURVEYS AND PROVIDING INFORMATION USED DURING
THE SURVEYS...INCLUDING MEMBERS OF THE HARFORD COUNTY OFFICE OF
EMERGENCY MANAGEMENT.

...TORNADO CONFIRMED IN HARFORD COUNTY MARYLAND...

LOCATION...HARFORD COUNTY MARYLAND
DATE...AUGUST 13 2013
ESTIMATED TIME...6:01 AM TO 6:02 AM EDT
MAXIMUM EF-SCALE RATING...EF0
ESTIMATED MAXIMUM WIND SPEED...70 MPH
MAXIMUM PATH WIDTH...75 YARDS
PATH LENGTH...1.0 MILES
BEGINNING LAT/LON...39.516N / 76.265W
ENDING LAT/LON...39.509N / 76.247W
* 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...

DAMAGE WAS LIMITED TO TREE DAMAGE. INITIAL DAMAGE WAS FOUND OFF
CALVARY RD...RT 136...JUST NORTH OF ITS INTERSECTION WITH RT 543.
THE LAST DAMAGE FOUND WAS A TREE UPROOTED IN THE 3100 BLOCK OF NOVA
SCOTIA RD BETWEEN CULLUM RD AND FORESTSIDE DR. NO PROPERTY DAMAGE TO
STRUCTURES WAS FOUND.

BASED ON THE DAMAGE...THIS TORNADO IS RATED EF0 WITH ESTIMATED WIND
SPEEDS OF 70 MPH. THE PATH LENGTH WAS APPROXIMATELY 1.0 MILE...WITH
AN ESTIMATED MAXIMUM WIDTH OF 75 YARDS. ACTUAL TIME ON THE GROUND
WAS APPROXIMATELY TWO MINUTES. THE INITIAL TORNADO START TIME OF
6:01 AM EDT WAS ESTIMATED BASED UPON MULTIPLE RADARS AND A CALL TO
THE HARFORD COUNTY 911 CENTER.

OTHER STORM DAMAGE WAS NOTED IN THE TOWN OF HAVRE DE GRACE...ALL
TREE DAMAGE. THIS DAMAGE WAS NOT SURVEYED...BUT FROM AFTER
EXAMINATION OF PHOTOGRAPHIC EVIDENCE AND INTERVIEWS WITH HARFORD
COUNTY OEM PERSONNEL...WAS DETERMINED TO HAVE BEEN CAUSED BY
STRAIGHTLINE THUNDERSTORM DOWNBURST WINDS.

THIS INFORMATION ABOVE CAN ALSO BE FOUND ON OUR WEBSITE AT
WEATHER.GOV/WASHINGTON.

FOR REFERENCE...THE ENHANCED FUJITA SCALE CLASSIFIES TORNADOES
INTO THE FOLLOWING CATEGORIES:

EF0...WIND SPEEDS 65 TO 85 MPH.
EF1...WIND SPEEDS 86 TO 110 MPH.
EF2...WIND SPEEDS 111 TO 135 MPH.
EF3...WIND SPEEDS 136 TO 165 MPH.
EF4...WIND SPEEDS 166 TO 200 MPH.
EF5...WIND SPEEDS GREATER THAN 200 MPH.

$$
SMZ/JRK/KRW