Buoy 42001: 92 mph 10-min 135mph gust 38 ft seas 924.7mb

[x-y-no]

2:50 pm CDT


Wind Direction (WDIR): N ( 350 deg true )
Wind Speed (WSPD): 77.7 kts
Wind Gust (GST): 97.1 kts
Wave Height (WVHT): 34.4 ft
Dominant Wave Period (DPD): 14 sec
Average Period (APD): 9.9 sec
Mean Wave Direction (MWDIR): E ( 80 deg true )
Atmospheric Pressure (PRES): 963.1 mb
Pressure Tendency (PTDY): -23.7 mb ( Falling Rapidly )

[stormynorfolk]

Gusts to 112 mph... will be interesting to see what we get for the next update... assuming there is one.

[drezee]

22/20 42001 25.8 -89.7 25.9 25.7 350 80 G101 350105 962.2-23.7 28.3 10.5 14 * 42001
22/20 42001 25.8 -89.7 26.0 26.0 350 78 G 97 340103 963.1-23.7 28.1 10.5 14 * 42001

[x-y-no]

3:50 pm CDT:

Wind Direction (WDIR): NNW ( 340 deg true )
Wind Speed (WSPD): 73.8 kts
Wind Gust (GST): 95.2 kts
Wave Height (WVHT): 38.1 ft
Dominant Wave Period (DPD): 13 sec
Average Period (APD): 9.8 sec
Mean Wave Direction (MWDIR): NE ( 56 deg true )
Atmospheric Pressure (PRES): 949.4 mb
Pressure Tendency (PTDY): -32.6 mb ( Falling Rapidly )

Looks like we may not get the eye directly over the bouy, or maybe we'll just catch the edge of it.

Peak continuous wind so far was 79.1 knots at 3:20pm.

[Solaris]

135 mph gust at 21z

[mattpetre]

How do these buoys measure wave height? GPS, Tether???

[Windy]

Yes, they measure wave height.

http://www.ndbc.noaa.gov/show_plot.php?station=42001&meas=wvht&uom=E

[mattpetre]

But what kind of instrumentation does this?

[Dick Pache]

looks like eye is passing over the buoy from combined wind speed air pressure plot
http://www.ndbc.noaa.gov/show_plot.php? ... wdpr&uom=E

[x-y-no]

4:50 pm CDT

Wind Direction (WDIR): NW ( 310 deg true )
Wind Speed (WSPD): 68.0 kts
Wind Gust (GST): 87.4 kts
Wave Height (WVHT): 32.2 ft
Dominant Wave Period (DPD): 12 sec
Average Period (APD): 9.0 sec
Mean Wave Direction (MWDIR): NNE ( 29 deg true )
Atmospheric Pressure (PRES): 928.2 mb
Pressure Tendency (PTDY): -46.6 mb ( Falling Rapidly )

[Dick Pache]

Article in GPS World about measurment of wave height
http://www.gpsworld.com/gpsworld/articl ... ?id=163591

[Windy]

This kind.

BTW, the bouy hasn't reported anything in more than half an hour... is it dead?

[DESTRUCTION5]

Its Dead...

[Benlanka]

It appears that it only reports once an hour. So expect new measurements 10-15 minutes after the hour.

[drezee]

in SW quad!!!

22/21 42001 25.8 -89.7 26.1 25.7 350 78 G 99 350117 948.4-32.7 28.1 11.0 13 * 42001
22/21 42001 25.8 -89.7 26.2 26.2 340 74 G 95 350109 949.4-32.6 28.0 11.5 13 * 42001

[HenkL]

Pressure was 927,2 at 22Z according to SYNOP. Wind 36 m/s with gust 46 m/s.

[Benlanka]

I was wrong... it also reports every 10 minutes but that is about an hour delayed:

TIME
(CDT) 5-day plot - Wind Direction WDIR 5-day plot - Wind Speed WSPD
4:50 pm NW ( 309 deg ) 69.3 kts
4:40 pm NW ( 311 deg ) 78.5 kts
4:30 pm NW ( 312 deg ) 82.4 kts
4:20 pm NW ( 320 deg ) 79.6 kts
4:10 pm NNW ( 333 deg ) 75.2 kts
4:00 pm NNW ( 339 deg ) 72.8 kts

[drezee]

Wind Direction (WDIR): SW ( 230 deg true )
Wind Speed (WSPD): 37.0 m/s
Wind Gust (GST): 50.0 m/s
Wave Height (WVHT): 7.4 m
Dominant Wave Period (DPD): 11 sec
Average Period (APD): 8.6 sec
Mean Wave Direction (MWDIR): N ( 9 deg true )
Atmospheric Pressure (PRES): 925.7 mb
Pressure Tendency (PTDY): -37.4 mb ( Falling Rapidly )

[jpigott]

what does 50 m/s = in mph

[mettski]

what does 50 m/s = in mph

1 mile = 1609m

calc: (3600 * 50)/1609 = 111.87mph.

buoy data has max wind gust as 97.1knots, (1kt = 1.1508mph) = 111.74mph

so its about right