4884RE: [wuhu_software_group] Re: Tornados sweep through central Florida in the middle of the night.
- Feb 2, 2007
It would be all fine and dandy if everyone left their computers running. The problem is most people turn it on to check Email, do a few things, and turn it off again. People like us who have weather stations and PC enthusiasts are about the only ones who do leave things running. Not to mention if I know I will have thunderstorms, I yank all cables to the PC. I still think phone alerts are very practical as the phone service is usually last to go with land-lines. The tough part would be how to regulate when an alert event was to occur, when a storm is right on the doorstep, or still 15 minutes away. Always the problem when dealing with people who will be ticked off when they are awoken in the night and then the storm fizzles. They unplug the phone and go back to sleep.
From: firstname.lastname@example.org [mailto: email@example.com ] On Behalf Of Alan Steremberg
Sent: Friday, February 02, 2007 1:06 PM
Subject: Re: [wuhu_software_group] Re: Tornados sweep through central Florida in the middle of the night.
We have an email alert product right now that you can sign up for by zipcode ($10/year or free to weather station owners).
Ed at AmbientWeather has a desktop app that alerts you in the tray, but I don't think it is quite what we want.
We have all the data, we are just missing a scalable way to deliver the alerts, and the small client application to start playing the local NWS weather feed, as well as putting up some alert data (plus it could optionally run an external program that could fire off x-10, etc).
If someone wants to build the client application, we will be happy to do the heavy lifting in the back end.
Using UDP is tricky - it is unreliable (TCP doesn't have that much overhead if we implement it carefully with custom software) and we can't really easily send UDP packets from wunderground to anyone's computer at home since 99% of them are behind a firewall router. We could use UPNP from the client and try to open a hole in the firewall (like MSN messenger and others) but it doesn't work on all the routers I have.. Just some of them. My bellsouth modem doesn't support it. my linksys router does.
I was hoping to send alerts of IM but I haven't built it yet, seems like that might be easy / good.
On 2/2/07, wuhu_software <wuhu_software@ yahoo.com> wrote:
A few weeks ago I was attempting to find various real-time NWS feeds
that are available to the general public. I found three feeds that
are available to the pulic. One is free, the other requires a one
time $75 fee, and I am not sure about the 3rd (I heard that it is
expensive). I am not sure which feeds you guys are subscribed to.
In any case, I was exchanging emails with Art Kraus looking for some
simple method to receive all SAME alerts that are active throughout
the U.S. Apparently there is no such mechanism at the moment. He
thought this might be something that is developed over the next few
The SAME alerts may be fed over the EMWIN network, although it is
difficult to find protocol information. They might also be sent over
the NWS Wire Service or NOAAPORT, I am not sure. That might require
some parsing to decode the SAME alerts from the other data.
If you guys at WU could parse the NWS streams to decode alerts, you
could develop an efficient polling and dissemination protocol, this
could open up many possibilities. The key to any such system would be
responsiveness without wasting a ton of bandwidth.
As an example, if a client application could send WU a poll packet
that contains a list of FIP and event codes, WU could repond with a
packet that describes a list of matching FIP codes and event codes if
those events are active.
These packets could be kept small and fast with the use of UDP
packets. Perhaps the clients register themselves one time with WU and
WU will send out alerts when they become active. A simple watchdog
packet could be used to detect Internet failures on the client side.
On the client side, once the client receives a packet from WU and
sees matching FIP and alert codes, that is all it really needs to
begin alerting operations. It could then perform audio alerting,
reading and displaying the NWS XML based warning information (based
on the active FIP code), and possibily take other user defined
actions including prompting the user to stream live audio.
If such a service were open to developers, any number of client
applications could be developed to take advantage of such a system.
You could have stand alone applications (perhaps on the toolbar), or
integration with existing appications (weather apps, home automation
systems, email and pager alert systems).
So basically, it seems that all of the pieces could be put together
easily. The main problem seems to be finding a real-time stream that
contains all SAME alerts (or that can be parsed from the stream), and
a central server to disseminate that data in real-time using an
efficient mecahnism to deliver the encoded data.
Here is a breakdown of the SAME alerts:
http://en.wikipedia .org/wiki/ Specific_ Area_Message_ Encoding
Here are the Internet feeds that I found.
1) Emergency Managers Weather Information Network. It is available to
the public. I am still trying to dig up information on the protocol.
It is not well documented. This data is sent several ways, satellite,
VHF radio, and the Internet. This data contains text and graphics
mixed together. There are 3 software packages for sale that
understand how to process the protocol, none are free.
2) NOAA Weather Wire Service. Although the stream of data is
controlled by one company, there is one time $75 registration fee.
Since you can telnet in to it, I am assuming it is just text. It
might be different using the satellite links, I am not sure. This
might be used to capture the events as they are put out on the wire
but it may be more work as the alerts/warnings are not encoded.
3) The NOAAPORT broadcast system provides a one-way broadcast
communication of NOAA environmental data and information in near-real
time to NOAA and external users. This broadcast is implemented by a
commercial provider of satellite communications utilizing the C-band.
It's primary purpose is for providing internal communications within
the National Weather Service and for providing forecasts, warnings
and other products to the mass media (newspapers, radio stations, TV,
etc.), emergency management agencies, and private weather services.
--- In wuhu_software_ group@yahoogroup s.com, "Alan Steremberg"
> I think we need to make a desktop of flash widget that we
> an alert and start the audio playing. I also spoke to thesonos
> integrating it into their system, but they didn't reallyunderstand
> emergency aspect yet. ie: why people would want their radioto
> switch from pretty music to weather radio.the
> On 2/2/07, Mark Wyman <mark@...> wrote:
> > I always wondered about having telephones linked into
> > network, so your phone would emit a specialized ringduring local
> > emergencies like this. It would be driven by law fromthe
> > who could target just the areas of concern. Since thesedays
everyone has a
> > phone, and not many have weather radios, it would be anideal
> > course they would probably tack on another $2 a monthfor this
> > *Subject:* [wuhu_software_ group] Tornados sweepthrough central
> > the middle of the night.tornados that
> > I was just watching the news this morning about the
> > through central Florida .The current estimate is that at least
> > an F2 tornado. I guess 1988 was the last time one sweptthrough
> > area in the middle of the night (so the news says).favorite
> > Looks like a real mess over by New Smyrna (one of my
> > Flordia, been there many times visting family).radios to
> > On the news, they discussed the real need for weather
> > people up in the middle of the night. Especially inw:st="on"> Florida .
> > Interestingly, the two Orlando WU audio streams are up
> > am not sure if they were up when the alerts went out,but I am
> > that they were.desktop.
> > It sure would be nice to have the WU SAME radios on the
> > Even if the audio streams do go down, the virtual radio
> > a users attention by playing alert sounds, alert text,or even
> > activating alert devices (say X10 devices).
> Alan Steremberg
> Weather Underground
> 415-543-5022 x 103
> http://www.wundergr ound.com
415-543-5022 x 103
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