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SKYWARN
SKYWARN is a self-contained
network of certified weather spotters sponsored and trained by the
National Weather Service
(NWS). Many spotters are Amateur Radio operators who submit
observations via radio. Compiled observations are forwarded to meteorologists at local NWS offices and the data is
incorporated into reports and forecasts. SKYWARN volunteers collect on-the-spot weather observations in localized areas that assist NWS
meteorologists in producing forecasts that are more accurate and warnings that
are more timely. SKYWARN and ARES-RACES are natural partners in Delaware County,
working together to make our communities safer.
In Delaware County, observations are
collected by the SKYWARN Coordinator or his assistants and data is forwarded to
the NWS office in Mount Holly, New Jersey. When severe weather strikes it is
recommended that SKYWARN personnel who are Amateur Radio operators monitor their
local SKYWARN repeater. Delaware County SKYWARN nets are conducted on the
KA3TWG repeater in Bethel Township, in the southwestern area of the county. The following observations are
criteria worthy of reporting to the NWS via the SKYWARN network:
tornadoes funnel clouds wall
clouds winds in excess of 58 mph
rain in excess of 1 inch / hour
flooding coastal flooding
snow in excess of 4 inches hail of any size
any ice
accumulation tsunami

SKYWARN Repeaters in Delaware
County
(Penn-Del Amateur Radio Club)
446.925 Mhz, ( - )
pl 173.8 Hz, Call sign: KA3TWG
224.220 Mhz, ( - ) pl
91.5 Hz, Call sign: KA3TWG
Become a Certified SKYWARN Spotter
Persons interested in volunteering as SKYWARN
spotters should contact:
SKYWARN Coordinator:
Hal Frantz, KA3TWG
email:
email KA3TWG

Click box above for
DelCo SKYWARN website
Weather-related Links
| Delaware County SKYWARN |
|
www.delcoskywarn.net |
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| NOAA |
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http://www.nws.noaa.gov/ |
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| Radar - Philadelphia Area (Mount Holly, NJ) |
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NOAA Radar
http://radar.weather.gov/radar.php?rid=dix&product=N0R&overlay=11101111&loop=no |
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Nexrad
Nexrad Radar - Philadelphia |
| Accuweather Radar
http://www.accuweather.com/index-radar.asp?partner=netweather |
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| How to Measure Snow, Estimate Wind Speed,
Identify Clouds, etc. |
| NOAA Guide to Measuring Snow (text)
http://www.crh.noaa.gov/grr/coop/howto/measuresnow/ |
| How to Measure Snow How to
Measure Snow (graphic - pdf) |
| Beaufort Scale (for estimating wind
force) Beaufort Scale.PDF |
| How to Estimate Wind Speed Using the Beaufort Scale (NOAA)
http://www.spc.noaa.gov/faq/tornado/beaufort.html |
| Identifying Cloud Types
http://www.windows.ucar.edu/tour/link=/earth/Atmosphere/clouds/cloud_types.html&edu=high |
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| USGS Streamflow Data (River levels) |
| Pennsylvania River Basins
http://waterdata.usgs.gov/pa/nwis/current/?type=flow |
| Brandywine Creek at Chadds Ford, PA
http://waterdata.usgs.gov/pa/nwis/uv/?site_no=01481000&PARAmeter_cd=00065,00060,00010 |
| Chester Creek near Chester, PA
http://waterdata.usgs.gov/pa/nwis/uv/?site_no=01477000&PARAmeter_cd=00065,00060,00010 |
| Cobbs Creek at U.S. Route 1
http://waterdata.usgs.gov/pa/nwis/uv/?site_no=01475530&PARAmeter_cd=00065,00060,00010 |
| Crum Creek near Newtown Square, PA
http://waterdata.usgs.gov/pa/nwis/uv/?site_no=01475850&PARAmeter_cd=00065,00060,00010
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| Delaware River at Chester, PA
http://waterdata.usgs.gov/pa/nwis/uv/?site_no=01477050&PARAmeter_cd=00065,00060,00010 |
| Ridley Creek at Media, PA
http://waterdata.usgs.gov/pa/nwis/uv/?site_no=01476480&PARAmeter_cd=00065,00060,00010 |
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