This was taken from www.intellicast.com. 210 mph winds in a non-tornadic storm is simply unreal. Nothing will stand up to those winds. Tornado rooms for houses are rated to about 350 to 400....but most houses and structures will fail above 180 mph.WTNT61 KNHC 091040
HURRICANE IVAN UPDATE
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
635 AM AST THU SEP 9 2004
AN AIR FORCE RESERVE RECONNAISSANCE AIRCRAFT INVESTIGATING IVAN
THIS MORNING RECENTLY REPORTED...AT 614 AM AST OR 1014Z...A
FLIGHT-LEVEL WIND OF 154 KT IN THE NORTHEAST QUADRANT. THEY ALSO
REPORTED A LOWER CENTRAL PRESSURE OF 920 MB...SUGGESTING THAT IVAN
MAY CONTAIN SURFACE WINDS A LITTLE STRONGER THAN THE 160 MPH
INDICATED IN THE 5 AM AST ADVISORY. DROPSONDE WIND REPORTS ALSO
INDICATED WINDS OF NEAR 210 MPH AT AN ALTITUDE OF ABOUT 350 FEET
ABOVE THE OCEAN SURFACE.
Hope it weakens before it hits Florida, or wherever it is headed.
BTW 1 knot is approx 1.15 mph.