Weather Alert in Alaska
Special Weather Statement issued July 6 at 1:24PM AKDT by NWS Juneau AK
AREAS AFFECTED: City and Borough of Sitka; Prince of Wales Island; Ketchikan Gateway Borough; Annette Island
DESCRIPTION: Following a front bringing rain across the Panhandle today, a developing low is expected to move into the SE Gulf Monday into Tuesday. This system is still expected to bring enhanced rainfall to the far southern Panhandle, particularly Ketchikan and Metlakatla. Forecast confidence continues to grow that the less impactful solution is still the most likely. This would have the low continue to be more progressive and the moisture plume stay further south before wrapping around to impact the eastern half of Clarence Strait / Misty Fjords late Monday night into Tuesday morning. While overall 24-hr rain amounts are now ranging from around 0.75 for coastal communities on Prince of Wales Island to 1.5 inches for Ketchikan and Metlakatla, the heaviest rainfall and rates are expected along southerly facing mountains in eastern portions of the Ketchikan Gateway Borough and Annette Island. It is not out of the question for one of those areas to get an outlier amount of as much as 2 inches. Fast-responding rivers and lakes may reach bank full conditions, but no flooding is expected at this time. Winds in Clarence Strait and the SE Gulf will increase out of the S and SE with fresh to strong breezes (18 - 24 kt) for Monday morning as it approaches the outer coast. Later in the week, Thursday and Friday, it is looking like a more impactful frontal system, with an associated weak to moderate atmospheric river, will move over the Panhandle. This will bring heavier rainfall & some relatively gusty conditions to a more widespread area. The heaviest precipitation again looks to focus on the southern Panhandle with isolated areas of 1.5 to 2 inches in 24 hours. The heaviest of this precipitation is expected to fall Thursday over areas along the coast. Ensembles are showing a >70% chance that winds along the NE Gulf will reach strong breezes to Gale force winds of 30 to 35 kts. We will continue to monitor this system as it gets closer.
INSTRUCTION: N/A
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Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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