A RECONNAISSANCE PLANE JUST MEASURED 87 KNOTS AT
FLIGHT LEVEL AND A MINIMUM PRESSURE OF 970 MB. BASED ON THIS
INFORMATION THE INITIAL INTENSITY HAS BEEN INCREASED TO 80 KNOTS.
http://www.srh.noaa.gov/data/NHC/TCDAT4.0507070839

MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 90 MPH...150
KM/HR...WITH HIGHER GUSTS. DENNIS IS A CATEGORY ONE HURRICANE ON
THE SAFFIR-SIMPSON SCALE. ADDITIONAL STRENGTHENING IS FORECAST
...AND DENNIS COULD BECOME A STRONG CATEGORY 2 HURRICANE BY THE
TIME IT REACHES JAMAICA LATER TODAY.
http://www.srh.noaa.gov/data/NHC/TCPAT4.0507070839