[aprssig] NWS Warning Filter
Stephen H. Smith
wa8lmf2 at aol.com
Mon Apr 7 11:18:45 CDT 2014
On 4/7/2014 11:50 AM, David Andrzejewski wrote:
> I'm interested in receiving all NWS warnings sent to APRS-IS by AE5PL, not just
> the ones in my local area (for logging purposes).
> If my filter is something like this:
> filter r/41/-81/100 t/n
> I should receive all of them, correct? That range filter won't limit it to my
> local area? My understanding is that filters should be additive.
> - Dave, KD8TWG
That's correct. The NWS warnings themselves contain no lat/long info, which
is what the range filter acts on.
Instead they contain 5-letter originating office codes, and numeric codes that
activate the relevant Arcview "shape files" (vector outlines) already stored on
You are always getting the warnings for the entire US, whether they display on
your particular map or not.
By the way, note that AE5PL only injects the NWS WARNINGS (severe weather
actually in progress) into the APRS-IS. You can get the full set of NWS
advisories, watches as well as warnings with the "t/n" filter switch, by
logging into firenet.us:14580 instead of one of the usual APRS servers.
Firenet.us contains everything in the normal APRS-IS stream, plus a lot of
other interesting stuff.
Quoting from <http://info.aprs.net/index.php?title=FireNet> :
"APRS FireNet is an Internet-based system using the APRS protocol and much of
the same client/server software to provide fire fighting, earthquake, and
weather information in much higher volume and detail than the traditional
APRS-IS system is capable of carrying. It carries the full APRS-IS feed PLUS
the additional types of objects listed below. The tie-in between FireNet and
APRS-IS allows station positions and messages to transfer between the systems,
but the special FireNet objects do not get sent to APRS-IS."
Stephen H. Smith wa8lmf (at) aol.com
EchoLink: Node # 14400 [Think bottom of the 2-meter band]
Home Page: http://wa8lmf.net
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