Weather Alert in Alaska
Special Weather Statement issued March 18 at 1:13PM AKDT by NWS Juneau AK
AREAS AFFECTED: City and Borough of Sitka; Petersburg Borough; Western Kupreanof and Kuiu Island; Prince of Wales Island; City and Borough of Wrangell; Ketchikan Gateway Borough; Annette Island
DESCRIPTION: Snow showers will continue to impact the region through the week with snow accumulations being limited during the daytime hours. A more significant round of snow is possible this weekend as cold temperatures aloft remain in place and we see more moisture move in. There remains a lot of uncertainty for snow accumulations at the surface as we are starting to see warmer day time temperatures due to increasing daylight and sun angle. Temperatures aloft are still more favorable for accumulating snow amounts. If the precipitation rates are significant enough to overcome the warmer surface temperatures, snow accumulations will be greater. But if the temperatures are able to overcome the precipitation rates, snowfall will be limited as it melts by the time it reaches the surface. This will need to be monitored for any changes in potential snow accumulation. Stay tuned for the latest forecast updates at weather.gov/juneau.
INSTRUCTION: N/A
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Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds
Weather Topic: What is Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
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