Paul Bunyan Amateur Radio Club, Bemidji, MN
Public
The Paul
Bunyan Amateur Radio Club has provided the SKYWARN severe weather
spotting program in Beltrami County for approximately 30 years. This
program provides the National Weather Service (NWS) with eyewitness
reports of severe weather. Trained observers relay severe weather
spotter information to the NWS using amateur radio as a reliable and
quick method of communication.
The NWS has expensive radar equipment designed to monitor weather
patterns. Even state-of-the-art equipment (NEXRAD) is not sensitive
enough to determine the existence of an actual tornado or other kind of
severe weather. It can only see where severe weather is likely to
occur. The NWS relies on reports from the public, law enforcement
personnel, and trained amateur radio SKYWARN observers to verify actual
severe weather.
The NWS is most interested in receiving severe weather reports from
trained sources. The kinds of reports sought by the NWS can include
hail, wind, damage, flash flooding, wall clouds (the area of a
thunderstorm where tornadoes can form), funnel clouds and tornadoes.
Establishing the existence of a rotating wall cloud or funnel cloud can
provide the NWS with verification of dangerous conditions in the storm
that are indicated, but not seen by radar. Reports on the size of hail
stones provides the NWS with a relative indicator of the intensity of
the thunderstorm.
Because conditions in and near a thunderstorm are chaotic and
confusing, many cloud formations are erroneously reported as indicators
of severe weather. Trained spotters are needed to confirm these
reports. Then NWS meteorologists quickly notify local authorities,
which activate civil defense sirens. The news media also receive
notification so they can make reports on local broadcast stations.
Members of the Paul Bunyan Amateur Radio Club carry pagers which allow
the National Weather Service to alert us when severe weather threatens
Beltrami County. When severe weather approaches the county, we send out
trained spotters equipped with ham radios which allow us to communicate
directly with the NWS radar operators in Grand Forks, ND. We report our
observations of dangerous cloud formations, wind speeds, hail, rain
amounts, flooding, and tornados. Normally, severe weather approaches
Beltrami County from the west or southwest. Therefore, we station our
storm spotters in an line west of Bemidji. The map below indicates the
six typical spotter positions we occupy (green circles numbered 1
through 6).
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Bunyan Amateur Radio Home Page