NWS Survey Determines Spotty Wind Damage from July 22nd Storms

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE GRAND RAPIDS MI
825 PM EDT FRI JUL 23 2010

...NWS SURVEY CONCLUDES NO TORNADOES FROM THUNDERSTORMS ON JULY
22ND...

NATIONAL WEATHER SERVICE OFFICIALS FROM GRAND RAPIDS CONDUCTED A
DAMAGE SURVEY ON FRIDAY BEGINNING IN ALLEGAN COUNTY. IT WAS
DETERMINED THAT STRAIGHT LINE WINDS AROUND 65 MPH OCCURRED NEAR
109TH AVENUE AND 37TH STREET AT APPROXIMATELY 3:29 PM EDT ON
THURSDAY JULY 22ND. THESE WINDS WERE STRONG ENOUGH TO LIFT A METAL
CORRUGATED ROOF NAILED TO A 2 BY 4 WOOD FRAME OVER A DOUBLE-WIDE
TRAILER. FOLLOWING THE TRACK OF THE STORM TO THE SOUTHEAST...VERY
SPOTTY TREE DAMAGE INDICATIVE OF WINDS UP TO 60 MPH AFFECTED THE
REST OF ALLEGAN COUNTY.

THE NEXT AREA OF NOTABLE DAMAGE OCCURRED OVER SOUTHWESTERN GULL LAKE
IN NORTHEASTERN KALAMAZOO COUNTY...WHERE THE SURVEY UNCOVERED TREE
DAMAGE INDICATIVE OF WINDS AROUND 70 TO 75 MPH DUE TO A MICROBURST.
BASED ON RADAR DATA...THIS OCCURRED AT APPROXIMATELY 4:25 PM EDT.

FINALLY...THE SURVEY DISCOVERED SOME OLD TREES DOWN NEAR URBANDALE...
WHICH IS LOCATED JUST NORTHWEST OF DOWNTOWN BATTLE CREEK. WINDS
WERE ESTIMATED TO BE 60 TO 65 MPH IN THIS AREA. THERE WAS NO
EVIDENCE OF TORNADIC DAMAGE IN THIS AREA.

THROUGH THE EXTENT OF THE SURVEY...TREES THAT WERE KNOCKED DOWN WERE
MOSTLY SHALLOW-ROOTED...WHICH MADE THEM ESPECIALLY SUSCEPTIBLE TO
FALLING GIVEN THE EXTREMELY WET SOIL CONDITIONS ACROSS THE SURVEY
AREA. THERE WAS NO EVIDENCE OF A TORNADO ANYWHERE ALONG THE SURVEYED
AREA.

THE ONLY DAMAGE THAT WAS OBSERVED FROM THE SECOND ROUND OF STORMS
THURSDAY NIGHT WAS A SHALLOW ROOTED PINE TREE THAT FELL ON A HOUSE
JUST SOUTHEAST OF FENNVILLE.


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