Weather Alerts for Matanuska Valley

Issued by the National Weather Service

Flood Advisory  FLOOD ADVISORY   Flood Advisory
MATANUSKA VALLEY

Areas Affected:
Western Susitna Valley
Effective: Mon, 7/20 3:54pm Updated: Tue, 7/21 12:55pm Urgency: Expected
Expires: Wed, 7/22 12:00pm Severity: Minor Certainty: Likely

 
Details:
* WHAT...Flooding caused by excessive rainfall continues.

* WHERE...Yentna River.

* WHEN...Until noon AKDT Wednesday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Water could enter a few low-lying cabins along the Yentna River,
particularly near Lake Creek.

* ADDITIONAL DETAILS...
- At 346 PM AKDT, the river gauge on the Yentna River indicates
rises in water levels from heavy rain across the advisory
area. Minor flooding is expected to continue or begin
shortly, especially along the Yentna River near Lake Creek.
- Anticipate water levels along the Yentna River to continue
rising before reaching a crest Tuesday afternoon. Water will
then slowly recede below minor flood levels by around
Wednesday night.
- For Yentna River at Lake Creek:
At 2:50pm the stage was 20.9 feet.
Flood Stage is 20.5 feet.
Forecast: A crest around 22.0 feet is expected around 4:00pm
Tuesday.

Impacts:
At 20.5 feet: Anglers Inn & King Point Lodges will have water
in several cabins.

At 22.0 feet: Several lodges and resorts will have water in a
number of cabins with water also encroaching the main lodge
buildings.


For Yentna River near Yentna Station:
At 3:59pm the stage was 18.1 feet.
Forecast: A crest around 21.6 feet is expected around 10:00pm
Tuesday.
- http://www.weather.gov/safety/flood

- If you live near or along Yentna River, stay alert and be
prepared to take action.

Information:
Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.

Flood Advisory  FLOOD ADVISORY   Flood Advisory
MATANUSKA VALLEY

Areas Affected:
Western Susitna Valley
Effective: Mon, 7/20 3:45pm Updated: Tue, 7/21 12:55pm Urgency: Expected
Expires: Wed, 7/22 10:00am Severity: Minor Certainty: Likely

 
Details:
* WHAT...Flooding caused by excessive rainfall is expected.

* WHERE...Skwentna River.

* WHEN...Until 1000 AM AKDT Wednesday.

* IMPACTS...Minor flooding in low-lying and poor drainage areas.
Dangerous flows over low-water crossings.

* ADDITIONAL DETAILS...
- At 341 PM AKDT, the river gauge at Skwentna indicates rises
in water levels from heavy rain across the advisory area.
Minor flooding is ongoing or expected to begin shortly,
especially near Skwentna River. Between 2.5 and 3.5 inches of
rain have fallen.
- For Skwentna River at Skwentna:
At 11:30am the stage was 40.2 feet.
Flood Stage is 42.0 feet.
Forecast: A crest around 43.3 feet is expected around 4:00am
Tuesday.

Impacts:
At 41.5 feet: Water starts to flow over low spots on the road
which is adjacent to an active slough.
At 43.5 feet: Water starts to encroach some houses located
near the active slough on the east side of town.
- http://www.weather.gov/safety/flood

- If you live near or along the Skentna River stay alert and be
prepared to take action.

Information:
Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.

Wind Advisory  WIND ADVISORY   Wind Advisory
MATANUSKA VALLEY

Areas Affected:
Anchorage
Effective: Tue, 7/21 11:15am Updated: Tue, 7/21 12:55pm Urgency: Expected
Expires: Wed, 7/22 6:30am Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...Southeast winds 15 to 30 mph with gusts of 30 to 45 mph
expected. Strongest winds in south to west Anchorage (along
Turnagain Arm).

* WHERE...Lower elevations of Anchorage and Eagle River.

* WHEN...From 1 AM to noon AKDT Thursday.

* IMPACTS...Gusty winds will blow around unsecured objects and a few
power outages may result. The combination of saturated soils and
wind could also lead to downed trees, especially already damaged
or diseased trees.

* ADDITIONAL DETAILS...The strongest winds will be late Wednesday
night through early Thursday morning, approximately between 3am
and 9am.

Information:
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

Secure outdoor objects.

Wind Advisory  WIND ADVISORY   Wind Advisory
MATANUSKA VALLEY

Areas Affected:
Anchorage Hillside / Eagle River
Effective: Tue, 7/21 11:15am Updated: Tue, 7/21 12:55pm Urgency: Expected
Expires: Wed, 7/22 6:30am Severity:  Moderate  Certainty: Likely

 
Details:
* WHAT...Southeast winds 25 to 40 mph with gusts of 50 to 65 mph
expected.

* WHERE...Anchorage and Eagle River Hillsides.

* WHEN...From 4 PM this afternoon to noon AKDT Thursday.

* IMPACTS...Gusty winds will blow around unsecured objects and a few
power outages may result. The combination of saturated soils and
wind could also lead to downed trees, especially already damaged
or diseased trees.

* ADDITIONAL DETAILS...There will be two rounds of strong and gusty
winds. The first round will occur Tuesday afternoon through
evening followed by a lull in winds late Tuesday night through
Wednesday afternoon. The second round of strong winds will be
Wednesday night through Thursday morning.

Rain will accompany both rounds of wind. Rain intensity looks
particularly heavy late Wednesday night through early Thursday
morning, which could lead to downed trees due to saturated soils.

Information:
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.

Secure outdoor objects.

Flood Watch  FLOOD WATCH   Flood Watch
MATANUSKA VALLEY

Areas Affected:
Hatcher Pass - Western Susitna Valley - Southern Susitna Valley - Central Susitna Valley - Northern Susitna Valley
Effective: Mon, 7/20 10:01pm Updated: Tue, 7/21 12:55pm Urgency: Future
Expires: Tue, 7/21 5:15pm Severity:  Severe  Certainty: Possible

 
Details:
* WHAT...Flooding caused by excessive rainfall is possible.

* WHERE...The following areas, Susitna Valley and Hatcher Pass. This
includes the cities of Skwentna, Willow, Talkeetna, Trapper Creek,
Petersville, and Chulitna.

* WHEN...From Tuesday afternoon through Thursday afternoon.

* IMPACTS...Excessive runoff may result in flooding of rivers,
creeks, streams, and other low-lying and flood-prone locations.
Creeks and streams may rise out of their banks. Low-water
crossings may be flooded. Area rivers, creeks, and streams are
elevated from the previous rain event and will likely rise again
during these next rain events.

* ADDITIONAL DETAILS...
- Two additional storm systems will bring rain to the Susitna
Valley, the first Tuesday afternoon through Wednesday morning
and the second Wednesday evening through Thursday afternoon.
0.50" to 1" of rain is likely (70-80%) with the first event
with an additional 1.0" to 2.5" of rain likely (70-80%) with
the second event. The track of both systems will favor the
highest rainfall totals over the northern and eastern
Susitna, along the Talkeetna Mountains. As a result, fast
responding rivers and streams along and east of the Parks
Highway may be more susceptible to flooding with this event.

- Http://www.weather.gov/safety/flood

Information:
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.

Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.



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