Aroostook County Skywarn

Page updated November 26th, 2018

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Caribou
Wednesday, 14 November
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COLOR CODE CHART FOR OUR NETS

RED
Code RED activation indicates that the National Weather Service in Caribou has issued one of the following alerts for Aroostook County:

    • Blizzard Warning
    • Extreme Wind Warning
    • Tornado Warning


Also means that severe weather is happening or imminent. Also means that grid outages and interruptions are happening or imminent in Aroostook County. A code RED activation also means there is imminent threat to life and/or property. This also means that roads may become impassible or visibility is less than 1/8 mile and travel is strongly discouraged and/or limited on an emergency basis. Spotters should only report severe weather to Net Control. Regular communications and updates with emergency management and law enforcement authorities are needed. A continued net will operate until the Warning is downgraded or canceled.
ORANGE
Code ORANGE activation indicates that the National Weather Service in Caribou has issued one of the following alerts for Aroostook County:

    • Coastal Flood Warning
    • Excessive Heat Warning
    • Flash Flood Warning
    • Flood Warning
    • Freeze Warning
    • Gale Warning
    • High Wind Warning
    • Hurricane Force Wind Warning
    • Ice Storm Warning
    • River Flood Warning
    • Severe Thunderstorm Warning
    • Special Marine Warning
    • Storm Warning
    • Wind Chill Warning
    • Winter Storm Warning


Also means that severe weather is happening or imminent. Also means that grid outages and interruptions are possible in Aroostook County. This also indicates that roads could potentially become impassible and visibility is less than ½ mile. Travel is strongly discouraged unless it is an emergency. Spotters should only report severe weather to Net Control. Communications with emergency management and law enforcement will occur in the event an emergency is called in during one of our nets. A Skywarn net will be called every four hours unless a code RED is called, the Warning is downgraded or canceled.
YELLOW
Code YELLOW activation indicates that the National Weather Service in Caribou has issued one of the following alerts for Aroostook County:

    • Coastal Flood Watch
    • Excessive Heat Watch
    • Flash Flood Watch
    • Flood Watch
    • Freeze Watch
    • High Wind Watch
    • River Flood Watch
    • Severe Thunderstorm Watch
    • Tornado Watch
    • Winter Storm Watch


It means that spotters and other amateur radio operators should be monitoring their local weather conditions. It further indicates that weather conditions may become severe and merit an upgrade to a WARNING. This also indicates that roads could potentially become impassible and visibility is less than 1 mile. Further identifies that inclement weather is expected and the potential for deteriorating weather conditions over the next 24 to 48 hours is possible. A Skywarn net will air at 0800 and 1600 hours daily unless a code ORANGE is called, the WATCH is downgraded or canceled.
GREEN
Code GREEN activation indicates that the National Weather Service in Caribou has issued one of the following alerts for Aroostook County:

    • Coastal Flood Advisory
    • Dense Fog Advisory
    • Frost Advisory
    • Heat Advisory
    • Small Craft Advisory
    • Wind Advisory
    • Wind Chill Advisory
    • Winter Weather Advisory


It means that spotters should be informed of minor disruptions to local weather conditions that will remain temporary. Possibility of isolated power outages during a code GREEN activation. Further identifies that inclement weather is possible over the next 12 to 24 hours and reporting is not required, although helpful. A Skywarn net will NOT air under a code GREEN activation unless a code YELLOW is called, a report with merit to start a net is submitted, or the ADVISORY is upgraded to a WATCH, however reports on local conditions will be welcome to the National Weather Service office in Caribou. Spotters should always monitor changing weather conditions.
BLUE
Code BLUE means there are no weather related issues affecting Aroostook County. Local weather should always be monitored for changing conditions.

Aroostook County Skywarn Frequencies


The following HF frequencies will be running a live Skywarn net for Aroostook County during a code ORANGE or RED activation:
    • 7.288 MHz LSB - Will primarily be used for daytime operations
    • 3.988 MHz LSB - Will be used for nighttime operations and NVIS during daylight hours

The following VHF and UHF frequencies will be running a live Skywarn net for Aroostook County during any activation where a net is needed:
    • 444.400 MHz FM (+5MHz Offset); CTCSS 241.8Hz - K1UVM repeater, located near Caribou covering most of Aroostook County. This is the PRIMARY net operating frequency.
    • 146.560 MHz FM - Secondary net simplex frequency in Aroostook County
    • 146.580 MHz FM - Tertiary net simplex frequency in Aroostook County


Aroostook County Weekly Skywarn Nets


SATURDAY
Weekly Skywarn HF Net: 1800hrs on 3.988 MHz LSB
    [This net will start operations on 6 JAN 2019]

THURSDAY
Weekly Skywarn Repeater Net: 1800hrs on 444.400 MHz FM (K1UVM Repeater)


What to report during a net


When we call a Skywarn net, regardless of color code, Net Control will ask for the following information in *THIS* exact order. Do not deviate from the list below:

1. Temperature (current temperature)
2. Barometric Pressure (current reading plus the trend [rising, falling or steady])
3. Wind speed and direction (last 10 minutes or so; predominant compass direction; peak wind gusts for the past 4 hours; if there is no wind, report it as "calm" not as 0 mph)
4. Sky cover (use a scale of 0 to 10 where 0 is perfectly clear and 10 is completely overcast; intermediate values are an estimate of the sky cover, i.e. "sky is 5" means an estimate of 50% sky coverage)
5. Precipitation (precipitation for the past 12 hours including the melt from new snow if applicable; total amount of new snow for the past 12 hours; total accumulated depth of snow in a representative area of ground)
6. Local visibility (in miles or kilometres)
7. Do you have power? (yes or no)
8. Do you have heat? (yes or no)
9. Do you have access to a working telephone? (yes or no)
10. Other (anything of significance such as moderate to severe flooding, frequent thunder and lightning, damaging winds, local road conditions)