This should give a good indication of the maximum winds in these parts of the hurricane. Applying the reduction yields winds at the surface of knots mph in the western and northern parts of Ike at this time. The values seem to match well with HRD's analysis at this time, but may be a little less than the wind analysis near the western and northern eye wall of Ike. Much of east Texas felt the brunt of hurricane force winds with the east side of the storm moving through Chambers and Jefferson Counties at landfall.
Maximum winds on the east side of the storm were between 80 to 85 knots mph. Based on this, Ike neither strengthened nor weakened in the three hours prior to landfall. Figure 4 shows the velocity data from the radar at this time. The radar velocities are significantly lower than the wind analysis. While this seems to indicate that Ike weakened, it actually did not.
The velocity data is distorted due to the eye of the storm passing over the radar at the time. This means that particles in the hurricane are circulating around the radar as the radar moves around. More of the radar beam becomes perpendicular to the storm leading to a zero velocity or the radar underestimating velocities.
Even though the maximum winds have decreased to 70 to 75 knots mph , hurricane force winds still cover much of Galveston Bay and Chambers County through the southern part of Hurricane Ike figure 5.
This again shows that Ike had stronger winds in the southern part of its core than the northern half. Also note that these hurricane force winds continue 6 hours after tropical storm force winds began affecting the coast in figure 1 at UTC. While the wind speeds may be at a Category 1 level on the Saffir-Simpson Scale, these winds persisted for a several hours which would contribute to more extensive wind damage across the region than if Ike was moving faster or had a smaller wind field.
Doppler radar velocities at the same time again provide support for the wind analysis by the HRD. This includes the Houston downtown area where several high rise buildings had damage with windows broken.
Since Ike moved away from the radar, the radar was able to better sample the velocities in the hurricane. The radar was able to resolve velocities near knots mainly over Galveston Bay and Chambers County.
Applying the reduction to the radar velocities yields winds of 77 knots 88 mph at the surface. This again is well within the range or slightly higher than the HRD wind analysis in figure 5.
This also supports the idea that the winds in the southern half of Hurricane Ike were stronger than the northern half. Finally at UTC AM CDT 13 September, figure 7 shows Ike moving more to the north with hurricane force winds shrinking, but remaining in place over the southern and eastern halves of the hurricane. Tropical storm force winds are beginning to decrease along the coast where these winds have been in place for 9 hours or more. This further illustrates that in this case it was not so much the intensity of the winds, but the longevity of the winds which contribute to extensive wind damage across southeast Texas.
Wind Observations from Research Organizations. A few hurricane research organizations had set up mobile observing stations across Southeast Texas to measure winds from Hurricane Ike. The anemometers are at a height of 2. This means that the winds speeds may be less than winds at the 10 meter height. Galveston County Office of Emergency Management.
Texas Medical Center. Federal Alliance for Safe Homes. The Federal Emergency Management Agency. Our Community Prepares. Facebook comments:. Mar 13th — Pilot service suspended fog.
Mar 15th — Pilot service resumed. Mar 15th — Pilot service suspended fog. Mar 16th — Pilot service suspended fog. Mar 18th — Pilot service resumed. Mar 23rd — Pilot service suspended fog. Mar 23rd — Pilot service resumed Mar 25th — Pilot service suspended fog.
Mar 25th — Pilot service resumed. Apr 07th — Pilot service suspended fog. Apr 08th — Pilot service resumed. Apr 12th — Pilot service at SB buoy suspended high winds.
Apr 12th — Pilot service resumed. Apr 18th — Pilot service suspended fog. Apr 18th — Pilot service resumed. Apr 19th — Pilot service suspended fog. Apr 19th — Pilot service resumed. Apr 24th — Pilot service suspended capsized vessel at Fina anchorage. Apr 24th — Pilot service resumed. May 08th — Pilot service suspended high winds. May 08th — Pilot service resumed. May 09th — Pilot service resumed. First Last. This field is for validation purposes and should be left unchanged.
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