Weather Alerts for Matanuska Valley

Issued by the National Weather Service

       Flood Advisory      

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
MATANUSKA VALLEY

Areas Affected:
Anchorage
Effective: Sat, 5/21 4:18pm Updated: Sat, 5/21 6:05pm Urgency: Expected
Expires: Sat, 5/21 10:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM AKDT THIS
EVENING FOR HOT DRY AND WINDY CONDITIONS FOR THE ANCHORAGE AREA...
* Winds...Southeast winds 10 to 20 mph with gusts up to 30 mph.
* TIMING...Until 10 PM this evening.
* Relative Humidity...As low as 11 percent.
* Temperatures...67 to 75 degrees.
* IMPACTS...Rapid ignition, growth and spread of fires will be
possible.
* ADDITIONAL DETAILS...The strongest sustained winds, gusts, and
lowest RH values are expected across the Anchorage Hillside,
west and south Anchorage through this evening. Winds will
subside late this evening with some RH recovery overnight.

Information:
A red flag warning means that critical fire weather conditions
are imminent or occurring now, or will shortly. It is directed
toward fire agencies, and through them to the public.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
MATANUSKA VALLEY

Areas Affected:
Matanuska Valley
Effective: Sat, 5/21 4:18pm Updated: Sat, 5/21 6:05pm Urgency: Expected
Expires: Sat, 5/21 10:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM AKDT THIS
EVENING FOR HOT DRY AND WINDY CONDITIONS FOR THE MATANUSKA VALLEY...
* Winds...Southeast winds 10 to 20 mph with gusts up to 30 mph.
* TIMING...Until 10 PM this evening.
* Relative Humidity...As low as 13 percent.
* Temperatures...68 to 75 degrees.
* IMPACTS...Rapid ignition, growth and spread of fires will be
possible.
* ADDITIONAL DETAILS...Knik River winds are expected to remain
gusty out of the southeast through this evening with low min RH
values. Winds will subside late this evening with some RH
recovery overnight.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A red flag warning means that critical fire weather conditions
are imminent or occurring now, or will shortly. It is directed
toward fire agencies, and through them to the public.

Red Flag Warning  RED FLAG WARNING   Red Flag Warning
MATANUSKA VALLEY

Areas Affected:
Copper River Basin
Effective: Sat, 5/21 4:18pm Updated: Sat, 5/21 6:05pm Urgency: Expected
Expires: Sat, 5/21 10:00pm Severity:  Severe  Certainty: Likely

 
Details:
...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM AKDT THIS
EVENING FOR HOT DRY AND WINDY CONDITIONS FOR THE COPPER RIVER
BASIN...
* Winds...South-Southeast winds 10 to 20 mph with gusts up to 30 mph.
* TIMING...Until 10 PM this evening.
* Relative Humidity...As low as 15 percent.
* Temperatures...66 to 71 degrees.
* IMPACTS...Rapid ignition, growth and spread of fires will be
possible.
* ADDITIONAL DETAILS...The strongest sustained winds, gusts, and
lowest relative humidity values are expected along the
Richardson and Edgerton Highways, including along the Copper
River. Winds subside late this evening with some RH recovery
overnight.

Information:
A red flag warning means that critical fire weather conditions
are imminent or occurring now, or will shortly. It is directed
toward fire agencies, and through them to the public.

Flood Advisory  FLOOD ADVISORY   Flood Advisory
MATANUSKA VALLEY

Areas Affected:
Copper River Basin
Effective: Sat, 5/21 4:18pm Updated: Sat, 5/21 6:05pm Urgency: Expected
Expires: Sat, 5/21 10:00pm Severity: Minor Certainty: Likely

 
Details:
...FLOOD ADVISORY FOR SNOWMELT REMAINS IN EFFECT UNTIL 145 PM AKDT
MONDAY...
* WHAT...Flooding caused by snowmelt continues.
* WHERE...Including the following area, Copper River Basin.
* WHEN...Until 145 PM AKDT Monday.
* IMPACTS...Minor flooding of Moose Creek and low-lying and poor
drainage areas in Glennallen, minor flooding on the Gulkana River,
and flooding of the Lake Louise Road are occurring. Expect rises
and near-bankfull conditions on other rivers and streams in the
area, including the Gakona River.
* ADDITIONAL DETAILS...
- At 439 PM AKDT, river gauge reports indicate rises in water
levels from snowmelt in the advisory area. Minor flooding is
ongoing or expected to begin shortly.
- Above normal temperatures rising into the upper 60s this
weekend in the Copper River Basin will increase higher
elevation snowmelt. Much of the Eastern Alaska Range had a
record amount of snow on the ground for mid-May. Significant
snowmelt runoff this weekend will move down into rivers and
streams in the Northern Copper River Basin, including Moose
Creek in Glennallen, the Gulkana River, and into the Lake
Louise drainage basin.
On Thursday morning, DOT officials reported that Moose Creek
in Glennallen had jumped its bank and split into two channels
and is impacting roads and buildings in the Glennallen area
north of the Glenn Highway.
Water levels are climbing in the Lake Louise Road area due to
increasing snowmelt rates in the area. Water has overtopped
the road and has blocked access to the lodge and the
airstrip.
- For Gulkana River at Sourdough:
At 4:30pm the stage was 11.73 feet.
Flood Stage is 11.0 feet.
Forecast: A crest around 12.1 feet is expected around 4:00am
Monday.
- Http://www.weather.gov/safety/flood

Information:
Stay tuned to further developments by listening to your local radio,
television, or NOAA Weather Radio for further information.
Be aware of your surroundings and do not drive on flooded roads.



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