Severe Weather Alerts

Your Weather

To update your location please enter your ZIP code, city, state, airport code or country in the field below. Weather by E-mail: Forecast storm alerts. Weather E-Mail Alert Sign Up »

Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Monday
• 
• High: 50 °
• Low: 34 °
• Partly Cloudy

• Tuesday
• 
• High: 61 °
• Low: 41 °
• Partly Cloudy

• Wednesday
• 
• High: 61 °
• Low: 43 °
• Partly Cloudy

• Thursday
• 
• High: 64 °
• Low: 43 °
• Partly Cloudy

• Friday
• 
• High: 64 °
• Low: 48 °
• Partly Cloudy

Southeast Alaska forecast discussion 
National Weather Service Juneau Alaska 
352 PM akdt sun may 19 2013 


Short term.../ Sunday night through Monday / a weakening 
surface low in the northern Gulf will be dissipating into an 
inverted across the southern half of the Panhandle through 
through Monday. Partly to mostly cloudy skies. Across the 
southern portion of the Gulf a more substantial cloud deck of 
stratus/stratocumulus clouds are streaming across the Gulf 
towards the southern Panhandle. Across the land areas mainly 
cloudy through this evening though there are some breaks over the 
channels. 


Expect the showers will be tapering off trough the evening with 
the southern areas probably hanging on the longest. A few of 
these showers may contain brief periods of sleet. Expect some 
clear over the northern section to perhaps the central Panhandle. 
With sufficient holes in the clouds and overnight lows into the 
lower to middle 30s. Will continue with the patchy areas of frost 
and frost advisory that is out. 


Locally breezy in northern Lynn Canal with southerly small craft 
winds or nearly so through the evening...expect the gradient to 
switch overnight and then become northerly by Monday increasing 
back to small craft level in the late afternoon. 


Long term...frosty start to Tuesday morning from northeast Gulf 
into north central Panhandle. Outflow wind in downtown Juneau and 
Douglas area from Monday evening into Tuesday night. Sunny skies 
for the work week. Clouds and precipitation are likely to return to 
the Panhandle by next weekend. 


The big news story for the long range period is the anticipated dry 
stretch through the end of the week. A strong high pressure ridge 
will build from North Pacific northeastward into Yukon and 
northwest territories, while an inverted trough extends 
northwestward from Pacific northwest into western British 
Columbia. The combination of these weather systems will enhance 
northerly flow that will usher in drier Continental polar air from 
Yukon and interior Alaska into the Panhandle. 


With clear nights and sunny days, the diurnal temperature range 
will be quite large (30 degrees or greater in some wind sheltered 
locations). With mostly clear skies and near calm conditions, 
locations from northeast Gulf into north central Panhandle 
(including communities of Yakutat, Hoonah, Gustavus, Elfin Cove, 
Pelican, and Mendenhall valley) will see overnight temperatures 
drop into the lower 30s once again on Monday night. Frost is still 
a possibility in these areas on Monday night. For Tuesday, expect 
mostly sunny skies with high temperatures will rising to the 60s 
across the Panhandle. The Continental polar airmass will be 
moderating with time. Thus, the temperatures on Tuesday night will 
be slightly warmer than that of Monday night. The threat of frost 
will be limited to the northeast Gulf. Mostly sunny skies and 
high temperatures in the 60s will continue into the end of the 
work week. With high temperatures in the 60s, temperatures will be 
above normal for this time of the year. Clouds and precipitation 
is likely to make a return to the Panhandle by the start of the 
weekend. 


With a tight north/S pressure gradient, winds will be in the 15 to 25 
miles per hour range from Monday night into Wednesday. In the traditional 
outflow area, higher wind gusts are expected. There is also a high 
likelihood of outflow wind happening in downtown Juneau and 
Douglas from Monday night into Wednesday. Sustained northeast wind 
up to 25 miles per hour is expected. Gusts can be as high as 35 mph, as 
indicated by NAM. Cross barrier flow and inversion are favorable 
for outflow wind to occur. However, there is an absence of 
critical layer. Wind gusts can be even higher if critical layer 
become favorable for outflow wind to occur. 


The strong offshore wind should keep the marine stratus off the 
Panhandle. However, if these low clouds make it onshore, 
temperatures may not be as warm as advertised in this forecast 
package as the low clouds are very effective in blocking all the 
incoming sunlight. 


Forecast confidence is above average through the work week, and 
decreases to average for the weekend. Model of choice is guidance 
from European model (ecmwf) and wpc. 


Ajk watches/warnings/advisories... 
public...frost advisory from 1 am to 7 am akdt Monday for akz017-020>022- 
025-026. 
Marine...Small Craft Advisory for pkz012-041-042. 
Small Craft Advisory due to seas for pkz043-051. 


&& 


$$ 


Bezenek/rcl