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June 10-14 Severe/Flooding Wx - Obs, Radar, Warnings, Dmg. rpts


wxmeddler

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From Philly forum

 

 

The new 12z GFS/UKMET clearly show a more progressive evolution as a convectively-induced vorticity maximum rides east a bit ahead in the long-wave. They both also show the SLP diving more southeastward throughout the afternoon and have better timing with current trends/placement of features than the slower 00z ECMWF (all of which is outlined nicely in this afternoon's model discussion).

 

Clearly, the situation tomorrow relies heavily on what kind of beast develops today in the Midwest and the effect it has on the mid levels.

 

Even with the progressive/further south scenario, a tornadic window may still exist late morning-early afternoon for the areas outlined in this morning's hatched zone from the SPC.

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Its slower by a lil bit over 12z... at 21z it looks like its near of just north of FDK

 

15z SREFs really also cut back on the SigTor ingredients for everyone

 

Makes sense given the progressive nature now and weaker low. Damaging wind threat seems to be the highest risk with isolated tornadoes possible. Pretty similar to most of our severe events around here. 

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Makes sense given the progressive nature now and weaker low. Damaging wind threat seems to be the highest risk with isolated tornadoes possible. Pretty similar to most of our severe events around here. 

 

I think a 10/15/45 will prob be what we see at 0600z with MOD risk...  could be be more 5/15/45 though (tor/hail/wind)

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Probably is putting it kindly. Condsider bing stuck on the Beltway or I-95 when an EF2 or 3 comes a roarin'. Although most single-family homes here have some sort of basement to go to besides the townhomes with garages on the bottom floor. Not too mnay people would be aware of tornado sirens or have even practiced tornado safety either.

 

You can imagine if that devastating La Plata tornado from 10 or so years back had hit a very densly populated area like say northern VA including going over a jammed up beltway.

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Here's another way of thinking about it. This is the pressure and CAPE graph of all the SREF ensemble members at BWI airport. You can see the majority pass the center/ cold front over BWI at 5pm. Consider that point the point at which there are uni-directional winds. Before that, any surface winds will be slightly backed. Now look at the CAPE (green,yellow and red are strength of helicity). High time for tornadoes is clearly between 11am and 2pm and then the mode should switch to dmg. winds.
post-741-0-63174300-1371069566_thumb.png

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Four Tornadoes Confirmed 

 

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
446 PM EDT WED JUN 12 2013

...FOUR CONFIRMED TORNADOES IN MARYLAND ON JUNE 10TH...

FOUR TORNADOES HAVE NOW BEEN CONFIRMED BY NATIONAL WEATHER SERVICE
STORM SURVEYS FROM THE JUNE 10TH THUNDERSTORM OUTBREAK - BALTIMORE
CITY...BALTIMORE COUNTY...HOWARD COUNTY...AND SAINT MARYS COUNTY.

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 AND TRANSPORTATION COMMUNITIES...SKYWARN STORM
SPOTTERS...AND MEMBERS OF THE PUBLIC AFFECTED BY THESE STORMS.


...TORNADO CONFIRMED IN FORK MARYLAND...

LOCATION...FORK IN BALTIMORE COUNTY MARYLAND
DATE...JUNE 10 2013
ESTIMATED TIME...3:28 PM EDT TO 3:30 PM EDT
MAXIMUM EF-SCALE RATING...EF-0
ESTIMATED MAXIMUM WIND SPEED...80 MPH
MAXIMUM PATH WIDTH...100 YARDS
PATH LENGTH...0.5 MILES
BEGINNING LAT/LON...39.462N / 76.449W
ENDING LAT/LON...39.473N / 76.447W
* 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 AND STORM DAMAGE SURVEY CONCLUDED A SMALL
TORNADO OCCURRED IN FORK, MARYLAND, FROM APPROXIMATELY 3:28 TO 3:30
PM EDT ON JUNE 10, 2013.

ABOUT SIX TREES WERE UPROOTED IN THE MOUNT VISTA ESTATES SUBDIVISION
OF FORK ALONG VISTA VIEW COURT.  THESE TREES WERE A MIX OF HARDWOOD
AND SOFTWOOD, SOME FALLING AT ANGLES OF UP TO 120 DEGREES FROM EACH
OTHER.  SEVERAL EYEWITNESSES SAW SWIRLING DEBRIS WITHIN THE WIND
FIELD AS THE DAMAGE WAS OCCURRING.  ADDITIONAL TREE DAMAGE ALONG
WITH DAMAGE TO A WOOD FENCE WAS LOCATED ACROSS THE STREET FROM FORK
UNITED METHODIST CHURCH ON FORK ROAD, APPROXIMATELY 0.5 MILES NORTH
OF THE DAMAGE IN MOUNT VISTA ESTATES.  THE SURVEY TEAM CROSSED THE
PATH BETWEEN THESE TWO POINTS, AS WELL AS UP TO TWO MILES ON EITHER
END OF THE DAMAGE, BUT NO FURTHER DAMAGE COULD BE FOUND.

BASED ON THE TREE DAMAGE, THIS TORNADO IS RATED EF-0, WITH ESTIMATED
WIND SPEEDS OF 70-80 MPH.  THE 0.5 MILE DAMAGE PATH LENGTH WAS
DISCONTINUOUS, WITH AN ESTIMATED WIDTH OF 100 YARDS.  TIME ON THE
GROUND WAS APPROXIMATELY 2 MINUTES.  START TIME 3:28 PM.

&&

...TORNADO CONFIRMED IN BALTIMORE MARYLAND...

LOCATION...LOCUST POINT IN BALTIMORE CITY MARYLAND
DATE...JUNE 10 2013
ESTIMATED TIME...3:44 PM EDT
MAXIMUM EF-SCALE RATING...EF-0
ESTIMATED MAXIMUM WIND SPEED...80 MPH
MAXIMUM PATH WIDTH...75 YARDS
PATH LENGTH...0.2 MILES
BEGINNING LAT/LON...39.262N / 76.593W
ENDING LAT/LON...39.265N / 76.593W
* 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...
A METAL BUILDING STRUCTURE IN THE SOUTH LOCUST POINT MARINE
TERMINAL WAS DAMAGED WHEN A WATERSPOUT OVER THE PATAPSCO RIVER
CAME ONSHORE, TRANSFORMING TO A SMALL TORNADO FROM APPROXIMATELY
3:44 TO 3:45 PM EDT ON JUNE 10, 2013.

THE METAL BUILDING STRUCTURE HAD A PORTION OF ITS NORTHEAST ROOF
PEELED UP, WRAPPING IT BACK AND FOLDING IT OVER THE EAST-FACING
SIDE OF THE BUILDING. ADDITIONALLY, A SMALL TRAILER ON WHEELS WAS
DEMOLISHED AS IT WAS PROPELLED TO THE NORTHWEST ABOUT 60 FEET FROM
ITS POSITION ON CINDER BLOCKS. AN AIR CONDITIONING UNIT WHICH WAS
PERMANENTLY INSTALLED IN THE WALL OF AN OFFICE ON THE NORTH FACING
SIDE OF THE BUILDING IN PROXIMITY TO WHERE THE ROOF DAMAGE
OCCURRED WAS BLOWN-IN. A LARGE AMOUNT OF DEBRIS WAS SEEN PLASTERED
TO A EAST-FACING CHAIN LINK FENCE ON THE NORTH SIDE OF THE PARKING
LOT.

AREAS TO THE NORTH THE MARINE TERMINAL WERE ALSO SURVEYED, AND NO
FURTHER DAMAGE WAS FOUND.

&&

...BRIEF EF-0 TORNADO CONFIRMED IN COLTONS POINT MARYLAND...

LOCATION...COLTONS POINT IN ST MARYS COUNTY MARYLAND
DATE...JUNE 10 2013
ESTIMATED TIME...9:01 PM TO 9:01 PM EDT
MAXIMUM EF-SCALE RATING...EF-0
MAXIMUM WIND SPEED...65 MPH
MAXIMUM PATH WIDTH...50 YARDS
LENGTH...0.25 MILES
BEGINNING LAT/LON...38.223N / 76.755W
ENDING LAT/LON...38.226N / 76.753W
* 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...

A GROUND SURVEY CONDUCTED BY THE NATIONAL WEATHER SERVICE...TOGETHER
WITH RADAR DATA FROM THE ANDREWS AFB TERMINAL DOPPLER WEATHER RADAR
DETERMINED THERE WAS A BRIEF EF-0 TORNADO TOUCHDOWN IN COLTONS POINT
MARYLAND. MINOR TREE AND ROOF DAMAGE WAS NOTED IN THE VICINITY OF
THE INTERSECTION OF COLTON POINT RD...RT 242 WITH BAYVIEW RD AND
ALONG BEACH RD BETWEEN CHARLES HALL RD AND POINT BREEZE RD. A FEW
SHINGLES WERE BLOWN OFF SOME STRUCTURES IN THIS AREA. A TREE CAME
DOWN ON WIRES IN THE 38300 BLOCK OF BEACH RD. A TRAMPOLINE NEAR A
RESIDENCE ON COLTON POINT RD NEXT TO THE TOWN POST OFFICE WAS LIFTED
UP AND BECAME LODGED 90 FEET UP IN A NEARBY TALL PINE TREE. TWO
LARGE WOODEN PLAY SET WERE BLOWN OVER...ONE WAS DRAGGED ABOUT 15
FEET.

THIS TORNADO WAS LIKELY THE EXTENSION OF A WATERSPOUT THAT CROSSED
THE POTOMAC RIVER JUST BEFORE 9 PM.

&&

...BRIEF EF-0 TORNADO CONFIRMED IN WOODBINE MARYLAND...

LOCATION...WOODBINE IN HOWARD COUNTY MARYLAND
DATE...JUNE 10 2013
ESTIMATED TIME...6:59 PM TO 7:01 PM EDT
MAXIMUM EF-SCALE RATING...EF-0
MAXIMUM WIND SPEED...80 MPH
MAXIMUM PATH WIDTH...100 YARDS
LENGTH...0.50 MILES
BEGINNING LAT/LON...39.291N / 77.127W
ENDING LAT/LON...39.295N / 77.121W
* 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...
THE NATIONAL WEATHER SERVICE AND HOWARD COUNTY OFFICE OF EMERGENCY
MANAGEMENT PERFORMED A STORM SURVEY ON TUESDAY JUNE 11TH IN WOODBINE
MARYLAND. THE RESULTS OF THIS SURVEY COMBINED WITH EYEWITNESS
ACCOUNTS CONFIRM THAT AN EF-0 TORNADO WITH WINDS OF 80 MPH OCCURRED
ALONG A ONE HALF MILE PATH.

TREE TOPS WERE SHEARED ALONG A PATH OF FOREST JUST WEST OF WOODBINE
ROAD. THE FUNNEL LOWERED TO THE GROUND A SHORT TIME LATER CAUSING
LARGE TREES TO BE UPROOTED OR SNAPPED. SOME OF THE TREES WERE
TWISTED. THE 100 YARD WIDE TORNADO CONTINUED TO TRACK NORTHEAST
ACROSS WOODBINE ROAD AND UPROOTED A TRAFFIC SIGN AND LOFTED THE
DEBRIS INTO A ROW OF TREES. ADDITIONAL MINOR DAMAGE WAS DONE TO A
WIRE FENCE. THE TORNADO CONTINUED NORTHEAST AND CAUSED SIGNIFICANT
DAMAGE TO A TWO CAR GARAGE LOCATED AT THE 3200 BLOCK OF STARTING
GATE COURT. DEBRIS FROM THE GARAGE WAS LOFTED INTO THE AIR AND
DISPLACED THROUGHOUT THE RESIDENT PROPERTY AND INTO NEIGHBORING
PROPERTIES. EYEWITNESSES REPORTED SEEING THE TORNADO LIFT NEAR THE
INTERSECTION OF HAYLOFT COURT AND STARTING GATE COURT. POCKETS OF
TREE DAMAGE WERE FOUND FURTHER EAST ON STARTING GATE COURT AND ALONG
CABIN RUN. SPORADIC MINOR TREE DAMAGE WAS ALSO NOTED ON FLORENCE AND
DUVAL ROADS TO THE NORTH AND EAST OF THE MAIN IMPACT ZONE. ONE
RESIDENT PROVIDED VIDEO OF THE FUNNEL.

&&
 

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90/90 in wind on the PDS STW... we will have to see how that fairs as we go into the overnight

I don't think it matters. No models bring that area in here do they? It might matter with regard to the low development but otherwise..
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