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Reports from the National Data Buoy Center's Stations During the Passage of Hurricane Wilma

15-25 October 2005

This report provides a summary of some of the wind speed parameters, the sea-level pressure, and wave parameter reports from the National Data Buoy Center's (NDBC) stations in the Gulf of Mexico in the vicinity of Hurricane Wilma's track.

Map showing track of Wilma and nearby stations

Figure 1: NDBC stations within 300 nm of Wilma's track

Wind Speed: For stations in this report, wind speed is sampled at a rate of 1.0 Hz. For the Coastal-Marine Automated Network (C-MAN) stations, SMKF1, LONF1, MLRF1, FWYF1, and SPGF, wind speeds are reported in knots to a resolution of 0.1 knots. C-MAN wind speeds have been converted to meters per second (m/s) for this report, where 1 m/s = 1.94 knots. For the buoy stations (42056, 42057, 41009, and 41010) wind speeds are reported in meters per second to a resolution of 0.1 m/s. For the plot legends:

CWS: The average wind speed over a 10-minute period at the anemometer height. In this report, data are plotted at the time of the end of the valid 10-minute period.

WSPD1: The average wind speed over an 8-minute (buoy) or 2-minite (C-MAN) period, reported hourly or half-hourly. Used to plot winds from stations where CWS was not available.

MXGT1: The Peak 5-second gust during the past hour at the anemometer height. The time of MXGT1 is reported to the nearest minute, however, in this report data are plotted at the valid time of the hourly report.

MX1GT1: The Peak 1-minute wind speed during the past hour at the anemometer height. The time of MX1GT1 is reported to the nearest minute, however, in this report data are plotted at the valid time of the hourly report.

GUST1: The peak 5-second gust recorded during the 8-minute sampling period to record WSPD1. Used plot winds from stations where MXGT1 was not available.

Pressure: For stations in this report, pressure is sampled at a rate of 1.0 Hz and reported to a resolution of 0.1 hectoPascal (hPa). For the plot legends:

BARO1 or 2: Sea-level Pressure. Coastal-Marine Automated Network (C-MAN) stations average the pressure over 2 minutes. The buoy stations average the pressure over 8-minutes.

MN1MSLP1: Lowest sea-level pressure averaged over a one-minute period.

Wave: For stations 42056 and 42057 the wave sampling period is 40 minutes. For stations 41009 and 41010 the wave sampling period is 20 minutes. The wave sampling rate of all stations in this report is 1.7066 Hz.

WVHGT: The significant wave height that represents the average of the highest one-third of the waves during the wave sampling period.

DOMPD:The Dominant Period that represents the wave period (time from between consecutive passes of the wave crests) of the waves with the most energy.

Water Level: The water level measurement sampling period is 6 minutes, and sampled at a rate of 1.0 Hz.

TGAUG: Six-minute water levels representing the height, in feet, of the water above or below Mean Lower Low Water (MLLW).

Closest Point of Approach (CPA): Time, bearing (degrees True), and distance (nautical miles) from the station to Hurricane Wilma at CPA are computed using the positions from the National Hurricane Center's advisories that have been interpolated to hourly values for positions, wind speed (intensity), and central pressure.



Wind/pressure plot from station 42057

Figure 2: Station 42057: Winds (Anemometer Height 10m) and Sea-level Pressure



Wave plot from station 42057

Figure 3: Station 42057: Significant Wave Height and Dominant Period

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO1) 998.1 mbs 10/18 2104Z
Maximum 10-minute Wind Speed (CWS) 28.2 m/s 10/19 0600Z
Maximum 5-s Gust (MXGT1) 30.2 m/s 10/19 0451Z
Maximum one-minute Wind Speed (MX1MGT1) 25.7 m/s 10/19 0451Z
Maximum Significant Wave Height (WVHGT) 6.08 m 10/19 1400Z
CPA Bearing and Distance To Hurricane 200°, 57.6 nm 10/18 1800Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=42057



Wind/pressure plot from station 42056

Figure 4: Station 42056: Winds (Anemometer Height 10 m) and Sea-level Pressure



Wave Plot for station 42056

Figure 5: Station 42056: Significant Wave Height and Dominant Period

Event Reported Value Date/Time of Event
Lowest One-Minute Sea-Level Pressure (MN1MSLP1) 986.6 hpa 10/21 0754Z
Maximum 10-minute Wind Speed (CWS) 31.9 m/s 10/21 0620Z
Maximum 5-s Gust (MXGT1) 41.7 m/s 10/21 0325Z
Maximum one-minute Wind Speed (MX1MGT1) 34.7 m/s 10/21 0545Z
Maximum Significant Wave Height (WVHGT) 11 m 10/21 0800Z
CPA Bearing and Distance to Hurricane 259°, 61.8 nm 10/21 0700Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=42056



Wind/pressure plot from station SMKF1

Figure 6: Station SMKF1: Winds (Anemometer Height 48.5 m) and Sea-level Pressure

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO1) 983.4 mbs 10/24 1000Z
Maximum 10-minute Wind Speed (CWS) 39.2 m/s 10/24 0940Z
Maximum 5-s Gust (MXGT2) 46.8 m/s 10/24 0922Z
CPA Bearing and Distance To Hurricane 329°, 82.3 nm 10/24 1000Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=SMKF1



Wind/pressure plot from station LONF1

Figure 7: Station LONF1: Winds (Anemometer Height 7.0m) and Sea-level Pressure



Water plot from station LONF1

Figure 8: Station LONF1: Water Level

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO1) 982.2 mbs 10/24 1100Z
Maximum 10-minute Wind Speed (CWS) 29.2 m/s 10/24 1050Z
Maximum 5-s Gust (MXGT1) 39.1 m/s 10/24 0927Z
CPA Bearing and Distance To Hurricane 316°, 80.6 nm 10/24 1000Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=LONF1



Wind/pressure plot from station MRLF1

Figure 9: Station MRLF1: Winds (Anemometer Height 15.8m) and Sea-level Pressure

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO1) 982.3 mbs 10/24 1200Z
Maximum 10-minute Wind Speed (CWS) 33.9 m/s 10/24 1220Z
Maximum 5-s Gust (MXGT1) 41.5 m/s 10/24 1234Z
CPA at Lowest Sea-Level Pressure (Adrift) 347°, 79.3 nm 08/29 1500Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=MRLF1



Wind/pressure plot from station FWYF1

Figure 10: Station FWYF1: Winds (Anemometer Height 43.9m) and Sea-level Pressure

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO1) 975.7 mbs 10/24 1300Z
Maximum 10-minute Wind Speed (CWS) 45.0 m/s 10/24 1230Z
Maximum 5-s Gust (MXGT1) 55.3 m/s 10/24 1243Z
CPA at Lowest Sea-Level Pressure (Adrift) 323°, 53.5 nm 08/29 1300Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=FWYF1



Wind/pressure plot from station SPGF1

Figure 11: Station SPGF1: Winds (Anemometer Height 9.8m) and Sea-level Pressure

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO1) 969.9 mbs 10/24 1600Z
Maximum 10-minute Wind Speed (CWS) 42.6 m/s 10/24 1600Z
Maximum 5-s Gust (MXGT1) 52.8 m/s 10/24 1552Z
CPA at Lowest Sea-Level Pressure (Adrift) 343°, 37.7 nm 08/29 1700Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=SPGF1



Wind/pressure plot from station 41009

Figure 12: Station 41009: Winds (Anemometer Height 5.0m) and Sea-level Pressure



Wave plot from station 41009

Figure 13: Station 41009: Significant Wave Height and Dominant Period

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO2) 985.2 mbs 10/24 1730Z
Maximum 8-minute Wind Speed (WSPD1) 26.8 m/s 10/24 1700Z
Maximum GUST (GUST1) 34.9 m/s 10/24 1730Z
Maximum Significant Wave Height (WVHGT) 6.0 m 10/24 2000Z
CPA Bearing and Distance To Hurricane 108°, 76.3 nm 10/24 1800Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=41009



Wind/pressure plot from station 41010

Figure 14: Station 41010: Winds (Anemometer Height 5.0m) and Sea-level Pressure



Wave plot from station 41010

Figure 15: Station 41010: Significant Wave Height and Dominant Period

Event Reported Value Date/Time of Event
Lowest Sea-Level Pressure (BARO1) 969.5 hpa 10/24 2000Z
Maximum 8-minute Wind Speed (WSPD1) 31.6 m/s 10/24 2100Z
Maximum GUST (GUST1) 42.3 m/s 10/24 2100Z
Maximum Significant Wave Height (WVHGT) 10.2 m 10/24 2200Z
CPA Bearing and Distance To Hurricane 167°, 33.9 nm 10/24 1800Z

Link to Station Page: http://www.ndbc.noaa.gov/station_page.php?station=41010