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Archives >> 2005 News Talkbacks

dave foster
Weather Hobbyist


Reged: Sun
Posts: 73
Loc: UK
Re: Tropical Storm Gamma forms near Honduras
      Fri Nov 18 2005 06:43 PM

For all you dunces like me that hasn't a clue what any of this code means, I looked it up and added my own comments to the example.

Example:
URNT11 KNHC 161227
AF967 0212A LILI OB 08 KNHC
97779 code
12314 time gmt
40169 lat
82508 long
04000 altitude
22020 wind dir / wind speed
25218
/0007 pressure 1007mb
42115;

The first two lines are the heading of the message.

The first group is almost always "97779".

Time. The first four numbers in the second group is the time of the observation, in Greenwich Mean Time (subtract 4 hours to get Eastern Daylight Time, 5 hours to get Central Daylight Time, or subtract 6 hours to get Central Standard Time). In the example, "1231" is 1231 GMT, or 7:31 a.m. CDT.

Location. Find the latitude in the last three digits of the third group, and the longitude in the first three digits of the second group. The latitude and longitude are reported in degrees and tenths. If the longitude is 100.0 degrees or above, the first "1" is dropped in the code, for example, 104.3W is coded "043"; you need to look elsewhere in the code if you aren't sure if that was 4.3W or 104.3W. In the above example, the aircraft was at 16.9N 82.5W.

Altitude. The first three digits of the fifth group tells you approximately how high the aircraft is flying. It is coded in "decameters", which means you need to multiply this number by 10 to convert to meters, then multiply by 3.281 if you want to convert to feet. In the above example, the altitude is coded "040" = 40 dm = 400 m = 1312 ft. This tells you the aircraft is on a low-level mission.

Winds. The sixth group is the wind measured at the altitude of the airplane. The first two digits are the wind direction, to the nearest ten degrees. Wind direction is reported similar to compass headings, where 360 or 0 degrees is north. In the code, 09=east, 18=south, and 27=west. The next three digits is the wind speed in knots. Multiply by 1.152 to convert to miles per hour. In the above example, "22020" is a wind of 220 degrees (blowing out of the southwest) at 020 knots (23 mph).

Pressure. The eighth group, always begins with a "/". The second digit tells you at what level the aircraft is flying. A "0", as above, shows the aircraft is flying below 1500 feet and is estimating sea-level pressure. The next three digits is the pressure or height data. Only if the second digit is a "0" will this be sea-level pressure (in millibars). In the above example, the sea-level pressure is 1007 millibars. This is a complicated group, and for aircraft flying above 1500 feet, see the full decode below.

--------------------
Dave Foster
http://www.ascn92.dsl.pipex.com

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Entire topic
Subject Posted by Posted on
* Tropical Storm Gamma Forms Near Honduras Clark Fri Nov 18 2005 06:43 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Mon Nov 21 2005 08:39 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Clark   Mon Nov 21 2005 09:43 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Psyber   Mon Nov 21 2005 11:36 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Tak   Mon Nov 21 2005 12:20 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras HanKFranK   Mon Nov 21 2005 12:38 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Psyber   Mon Nov 21 2005 02:31 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Clark   Mon Nov 21 2005 05:41 PM
. * * Clarifications Ed DunhamAdministrator   Mon Nov 21 2005 09:11 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Mon Nov 21 2005 05:53 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Clark   Tue Nov 22 2005 01:39 AM
. * * delta time... HanKFranK   Tue Nov 22 2005 10:35 AM
. * * Re: delta time... Margie   Tue Nov 22 2005 12:21 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras typhoon_tip   Mon Nov 21 2005 07:56 PM
. * * Global Warming and weather events.. typhoon_tip   Mon Nov 21 2005 08:35 PM
. * * Re: Global Warming and weather events.. ltpat228   Mon Nov 21 2005 09:38 PM
. * * A little hint.... Doombot!   Tue Nov 22 2005 12:40 AM
. * * Re: Global Warming and weather events.. HanKFranK   Mon Nov 21 2005 09:37 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Katie   Mon Nov 21 2005 03:28 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Clark   Mon Nov 21 2005 02:13 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras ftlaudbob   Mon Nov 21 2005 11:13 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Hurricane Dad   Mon Nov 21 2005 11:18 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Rabbit   Mon Nov 21 2005 11:36 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Mon Nov 21 2005 12:14 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Rabbit   Mon Nov 21 2005 10:04 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Mon Nov 21 2005 10:02 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Sun Nov 20 2005 10:17 AM
. * * 95L HanKFranK   Sun Nov 20 2005 11:54 AM
. * * Re: 95L Genesis   Sun Nov 20 2005 02:32 PM
. * * Re: 95L Lee-Delray   Sun Nov 20 2005 03:26 PM
. * * how about some predictions here?! vineyardsaker   Sun Nov 20 2005 07:32 PM
. * * Re: how about some predictions here?! Clark   Sun Nov 20 2005 08:43 PM
. * * GAMMA...Gone danielwAdministrator   Sun Nov 20 2005 10:54 PM
. * * 9 Days and counting danielwAdministrator   Sun Nov 20 2005 07:49 PM
. * * 95L and GOM Low danielwAdministrator   Sun Nov 20 2005 07:32 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Sat Nov 19 2005 09:44 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Sat Nov 19 2005 04:01 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras ralphfl   Sat Nov 19 2005 05:38 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras pincty   Sat Nov 19 2005 07:03 PM
. * * Tropical Storm Classification danielwAdministrator   Sat Nov 19 2005 08:27 PM
. * * Re: Tropical Storm Classification WXMAN RICHIE   Sat Nov 19 2005 08:41 PM
. * * Re: Tropical Storm Classification danielwAdministrator   Sat Nov 19 2005 08:50 PM
. * * More points to ponder danielwAdministrator   Sat Nov 19 2005 09:18 PM
. * * Re: More points to ponder Old Sailor   Sat Nov 19 2005 10:37 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras ftlaudbob   Sat Nov 19 2005 04:07 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Sat Nov 19 2005 01:10 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Old Sailor   Sat Nov 19 2005 01:37 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras dave foster   Sat Nov 19 2005 01:47 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Sat Nov 19 2005 11:45 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras bobbutts   Sat Nov 19 2005 12:59 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras MikeCAdministrator   Sat Nov 19 2005 11:37 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras srsarner   Sat Nov 19 2005 09:34 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Ed DunhamAdministrator   Sat Nov 19 2005 10:01 AM
. * * Re: Tropical Storm Gamma Forms Near Honduras Clark   Sat Nov 19 2005 11:06 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Margie   Sat Nov 19 2005 04:36 PM
. * * Re: Tropical Storm Gamma Forms Near Honduras Lee-Delray   Sat Nov 19 2005 04:46 PM
. * * Bye Bye Gamma Wxwatcher2   Sat Nov 19 2005 05:09 PM
. * * Re: Bye Bye Gamma Clark   Sat Nov 19 2005 11:10 PM
. * * Re: Bye Bye Gamma Lee-Delray   Sat Nov 19 2005 05:14 PM
. * * Re: Tropical Storm Gamma forms near Honduras Katie   Fri Nov 18 2005 03:49 PM
. * * Re: Tropical Storm Gamma forms near Honduras Tropics Guy   Fri Nov 18 2005 04:00 PM
. * * Weather Station WXMAN RICHIE   Fri Nov 18 2005 03:59 PM
. * * Re: Tropical Storm Gamma forms near Honduras ralphfl   Fri Nov 18 2005 03:56 PM
. * * Re: Tropical Storm Gamma forms near Honduras Thunderbird12   Fri Nov 18 2005 04:00 PM
. * * Re: Tropical Storm Gamma forms near Honduras Margie   Fri Nov 18 2005 04:07 PM
. * * Re: Tropical Storm Gamma forms near Honduras Tak   Fri Nov 18 2005 04:21 PM
. * * Re: Tropical Storm Gamma forms near Honduras Rich B   Fri Nov 18 2005 04:33 PM
. * * Re: Tropical Storm Gamma forms near Honduras Thunderbird12   Fri Nov 18 2005 04:46 PM
. * * Re: Tropical Storm Gamma forms near Honduras Margie   Fri Nov 18 2005 04:46 PM
. * * Re: Tropical Storm Gamma forms near Honduras Rich B   Fri Nov 18 2005 05:21 PM
. * * Re: Tropical Storm Gamma forms near Honduras Margie   Fri Nov 18 2005 05:23 PM
. * * Re: Tropical Storm Gamma forms near Honduras Wxwatcher2   Fri Nov 18 2005 05:33 PM
. * * Re: Tropical Storm Gamma forms near Honduras WXMAN RICHIE   Fri Nov 18 2005 04:39 PM
. * * Re: Tropical Storm Gamma forms near Honduras Lee-Delray   Fri Nov 18 2005 04:37 PM
. * * Re: Tropical Storm Gamma forms near Honduras Tak   Fri Nov 18 2005 05:07 PM
. * * Re: Tropical Storm Gamma forms near Honduras Lee-Delray   Fri Nov 18 2005 05:12 PM
. * * Re: Tropical Storm Gamma forms near Honduras ralphfl   Fri Nov 18 2005 05:16 PM
. * * Re: Tropical Storm Gamma forms near Honduras Lysis   Fri Nov 18 2005 05:21 PM
. * * Re: Tropical Storm Gamma forms near Honduras WXMAN RICHIE   Fri Nov 18 2005 06:09 PM
. * * Re: Tropical Storm Gamma forms near Honduras Thunderbird12   Fri Nov 18 2005 06:17 PM
. * * Re: Tropical Storm Gamma forms near Honduras dave foster   Fri Nov 18 2005 06:43 PM
. * * Re: Tropical Storm Gamma forms near Honduras ralphfl   Fri Nov 18 2005 05:58 PM
. * * Re: Tropical Storm Gamma forms near Honduras ralphfl   Fri Nov 18 2005 10:30 PM
. * * Re: Tropical Storm Gamma forms near Honduras pincty   Fri Nov 18 2005 06:49 PM
. * * Re: Tropical Storm Gamma forms near Honduras Dawn   Fri Nov 18 2005 07:04 PM
. * * Re: Tropical Storm Gamma forms near Honduras ChessieStorm   Fri Nov 18 2005 11:07 PM
. * * Re: Tropical Storm Gamma forms near Honduras danielwAdministrator   Fri Nov 18 2005 11:18 PM
. * * Re: Tropical Storm Gamma forms near Honduras saluki   Sat Nov 19 2005 01:18 AM
. * * 4 AM EST Advisory...oops danielwAdministrator   Sat Nov 19 2005 04:15 AM
. * * Re: 4 AM EST Advisory...oops danielwAdministrator   Sat Nov 19 2005 04:27 AM
. * * Re: 4 AM EST Advisory...oops Hugh   Sat Nov 19 2005 09:32 AM
. * * Re: 4 AM EST Advisory...oops ralphfl   Sat Nov 19 2005 08:00 AM
. * * Re: Tropical Storm Gamma forms near Honduras pincty   Fri Nov 18 2005 07:14 PM
. * * Why I think it's heading to Tampa Bloodstar   Fri Nov 18 2005 06:36 PM
. * * Re: Why I think it's heading to Tampa Hootowl   Fri Nov 18 2005 07:03 PM
. * * Re: Why I think it's heading to Tampa Ron Basso   Fri Nov 18 2005 07:24 PM
. * * Re: Why I think it's heading to Tampa HanKFranK   Fri Nov 18 2005 07:55 PM
. * * Re: Why I think it's heading to Tampa *Killed -- Sent to Graveyard* collegemom   Fri Nov 18 2005 07:33 PM
. * * Re: Why I think it's heading to Tampa Lee-Delray   Fri Nov 18 2005 07:48 PM
. * * Re: Why I think it's heading to Tampa weatherwatcher999   Fri Nov 18 2005 08:08 PM
. * * Re: Why I think it's heading to Tampa Major7   Fri Nov 18 2005 09:49 PM
. * * Gamma danielwAdministrator   Fri Nov 18 2005 08:20 PM
. * * Area Forecast Dicussion excerpts danielwAdministrator   Fri Nov 18 2005 08:34 PM
. * * SHIPS forecast danielwAdministrator   Fri Nov 18 2005 09:02 PM
. * * Re: SHIPS forecast Lee-Delray   Fri Nov 18 2005 09:07 PM
. * * Re: SHIPS forecast laxpimpj   Fri Nov 18 2005 09:47 PM
. * * Classes and Recon danielwAdministrator   Fri Nov 18 2005 09:56 PM
. * * Re: Classes and Recon dave foster   Fri Nov 18 2005 10:09 PM
. * * Re: SHIPS forecast Hugh   Fri Nov 18 2005 09:49 PM
. * * Gamma Hugh   Fri Nov 18 2005 09:46 PM
. * * Re: Why I think it's heading to Tampa Hugh   Fri Nov 18 2005 07:03 PM
. * * Re: Tropical Storm Gamma forms near Honduras Lee-Delray   Fri Nov 18 2005 06:07 PM
. * * Re: Tropical Storm Gamma forms near Honduras Tak   Fri Nov 18 2005 05:55 PM
. * * Re: Tropical Storm Gamma rmbjoe1954   Fri Nov 18 2005 04:43 PM
. * * Re: Tropical Storm Gamma forms near Honduras Rich B   Fri Nov 18 2005 04:39 PM
. * * Re: Tropical Storm Gamma forms near Honduras Lee-Delray   Fri Nov 18 2005 04:44 PM
. * * Re: Tropical Storm Gamma forms near Honduras Lee-Delray   Fri Nov 18 2005 04:16 PM
. * * Re: Tropical Storm Gamma forms near Honduras HURRICANELONNY   Fri Nov 18 2005 03:55 PM
. * * Re: Tropical Storm Gamma forms near Honduras *DELETED* Lee-Delray   Fri Nov 18 2005 03:57 PM
. * * Re: Tropical Storm Gamma forms near Honduras ralphfl   Fri Nov 18 2005 03:59 PM
. * * Re: Tropical Storm Gamma forms near Honduras Lee-Delray   Fri Nov 18 2005 04:02 PM
. * * Re: Tropical Storm Gamma forms near Honduras ralphfl   Fri Nov 18 2005 04:05 PM
. * * Re: Tropical Storm Gamma forms near Honduras HURRICANELONNY   Fri Nov 18 2005 04:05 PM

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