Petersburg, Alaska Weather Conditions

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Current Conditions

  • 45°
  • Mostly Cloudy
  • Wind: Calm
  • Humidity: 71%
  • Visibility: 10.0 miles
  • Dew Point: 36°
  • Pressure: 30.41 in. -

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Next 12 Hours

3  pm
6  pm
9  pm
12  am
3  am
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Mostly Cloudy
Mostly Cloudy
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Friday
  • Overcast
  • High: 45 °
  • Low: 35 °
  • Overcast
  • Saturday
  • Chance of Rain
  • High: 41 °
  • Low: 39 °
  • Chance of Rain
  • Sunday
  • Rain
  • High: 42 °
  • Low: 29 °
  • Rain
  • Monday
  • Snow
  • High: 38 °
  • Low: 28 °
  • Snow
  • Tuesday
  • Partly Cloudy
  • High: 39 °
  • Low: 27 °
  • Partly Cloudy

Forecast for Petersburg, Alaska

Updated: 1:18 PM AKST on January 06, 2015

  • Friday

    Overcast. High 44F. Winds light and variable.

  • Friday Night

    Cloudy skies early, followed by partial clearing. Low around 35F. Winds light and variable.

  • Saturday

    Showers early becoming a steady light rain later in the day. High 41F. Winds light and variable. Chance of rain 80%.

  • Saturday Night

    Occasional light rain. Low 39F. Winds light and variable. Chance of rain 90%.

  • Sunday

    Rain likely. High 42F. Winds light and variable. Chance of rain 100%. Rainfall around a half an inch.

  • Sunday Night

    A few showers early with mostly cloudy conditions late. Low 29F. Winds light and variable. Chance of rain 30%.

  • Monday

    Periods of rain and snow. High 38F. Winds SSW at 5 to 10 mph. Chance of precip 80%. Snow accumulations less than one inch.

  • Monday Night

    On and off snow showers early. Breaks in the overcast later. Low 28F. Winds light and variable. Chance of snow 30%.

  • Tuesday

    Partly cloudy. High 39F. Winds light and variable.

  • Tuesday Night

    Partly cloudy skies in the evening, then becoming cloudy overnight. Low 27F. Winds light and variable.

  • Wednesday

    Snow showers early, with a steadier snow developing late in the day. High 37F. Winds light and variable. Chance of snow 70%. 3 to 5 inches of snow expected.

  • Wednesday Night

    Cloudy with rain and snow in the evening changing to all rain overnight. Low 32F. Winds light and variable. Chance of precip 80%. Snow accumulating 1 to 3 inches.

  • Thursday

    Periods of rain. High 41F. Winds light and variable. Chance of rain 80%. Rainfall around a half an inch.

  • Thursday Night

    Cloudy with periods of rain. Low 36F. Winds SE at 5 to 10 mph. Chance of rain 70%. Rainfall near a half an inch.

  • Friday

    Cloudy with periods of rain. High 43F. Winds SE at 5 to 10 mph. Chance of rain 70%. Rainfall around a half an inch.

  • Friday Night

    Rain...mixing with snow late. Low 38F. Winds SE at 5 to 10 mph. Chance of precip 60%.

  • Saturday

    Rain likely. High 44F. Winds S at 5 to 10 mph. Chance of rain 60%. Rainfall around a quarter of an inch.

  • Saturday Night

    Rain...changing to snow late. Low near 35F. Winds SSW at 5 to 10 mph. Chance of precip 60%. Snow accumulating 1 to 3 inches.

  • Sunday

    Rain and snow in the morning transitioning to light rain in the afternoon. High 43F. Winds S at 5 to 10 mph. Chance of rain 60%. Snow accumulations less than one inch.

  • Sunday Night

    Cloudy with rain and snow showers. Low 36F. Winds light and variable. Chance of precip 50%.

  • Monday

    Overcast with rain showers at times. High 47F. Winds light and variable. Chance of rain 40%.

  • Monday Night

    Cloudy with showers. Low 38F. Winds ESE at 5 to 10 mph. Chance of rain 40%.

Severe Weather Alert Descriptions

 Record Report  Statement as of 6:15 am AKST on March 5, 2015

... Record precipitation fell Thursday...

Location new record old record year set

Juneau Airport 0.70 inches 0.63 inches 2010
*juneau-Douglas WWTP 0.87 inches 0.03 inches 2012
*eaglecrest base 0.79 inches 0.51 inches 2007
*skagway power 0.32 inches 0.18 inches 2004

* record reports for these stations may not be as meaningful as
those for stations with 30-year decadal normals (1981-2010).

Kv Mar 15

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Pearl F Street, Petersburg, AK

Updated: 3:01 PM AKST

Temperature: 45.7 °F Dew Point: 42 °F Humidity: 86% Wind: North at - Pressure: 30.49 in Hourly Precipitation: - Windchill: 46 °F Graphs

Location: RAWS KAKE AK US, Kake, AK

Updated: 1:55 PM AKST

Temperature: 43 °F Dew Point: 41 °F Humidity: 92% Wind: North at 2 mph Pressure: - Hourly Precipitation: 0.02 in Windchill: 43 °F Graphs

Location: Papke's Landing, Petersburg, AK

Updated: 3:02 PM AKST

Temperature: 42.8 °F Dew Point: 42 °F Humidity: 99% Wind: Calm Pressure: 30.49 in Hourly Precipitation: - Windchill: 43 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion

Southeast Alaska forecast discussion 
National Weather Service Juneau Alaska 
300 PM akst Friday Mar 6 2015 

Short term...satellite imagery this afternoon showing a high 
pressure ridge over the Alaska Panhandle, a strong 988 mb low in the 
Bering Sea tracking east and a weakening 998 mb low in the North 
Pacific retrograding to the west. Currently 500 mb vorticity maximum over 
the Panhandle ridge moving over the Panhandle enhancing lift. 
Along with cooler air aloft this is producing scattered rain 
showers over the central and northern Panhandle but with numerous 
clear breaks. As the vorticity maximum tracks east shower activity from this 
disturbance will diminish but through the night will have increased 
precipitation potential from the two lows in our vicinity. To the south 
bans emanating form the North Pacific low will near the southern 
Panhandle tonight. Since the low is pulling away to the west with 
less support aloft not expecting much from this system to reach 
the southern Panhandle. To the north the low advancing from the 
Bering Sea is much better organized and will begin to move in 
precipitation to the northern coastal Panhandle through the evening. As 
the wave progresses to the southeast through Saturday probability of precipitation will 
increase over the northern and central Panhandle. While there is 
some colder air aloft with the middle level trough moving over the 
area current satellite appears more stratiform then showery in 
nature. While the colder air aloft will eventually mix down to the 
surface the Panhandle will still be above normal Friday night and 
Saturday due to warming air ridging up from the North Pacific low. 

Pressure gradient between the Panhandle ridge and low over the 
Yukon increased bit faster today with gusty winds over the 
northern Inner Channels. North Lynn Canal picked up to small craft 
levels today with 15 to 25 miles per hour winds over Skagway. Pressure 
gradient will continue to tighten was the Bering Sea low advances 
eastward. For now keeping north Lynn just below gale force for Saturday 
and keeping Skagway gusts just below 40 mph, but both areas could 
near these higher thresholds. Small craft level winds will develop 
in S Lynn Canal and Stephens Passage as well on Saturday with 
winds picking up to 20 knots elsewhere. 

Models in fair agreement this afternoon with NAM/ECMWF/Gem still 
in line with inherited grid. Bumped up winds tonight slightly 
following the current wind trend. Backed off on some precipitation over 
the north central Panhandle as models were bit over zealous with the 
shower activity over the ridge. Forecast confidence is average. 

Long term...the Bering Sea low discussed above will feature 
prominently in the early portion of the extended range forecast. 
As the lows tracks east across the interior, the associated front 
will drag across the far northern Gulf and then sag southeast 
across the Panhandle. In addition to rain near sea level, the 
front will bring significant snowfall to higher elevations with 
close to 4 inches along The Klondike Highway near White Pass and 2 
to 3 inches along the Haines Highway. As the front passes to the 
east and the parent low moves into the Yukon, a strong southerly 
pressure gradient will generate southerly gale force winds in 
northern Lynn Canal Saturday night and Sunday. High end small 
craft winds for southern Lynn Canal during the same time period. 

In the wake of this first low, another will form near Prince 
William Sound and push showers east. Precipitation from this 
feature will be on the leading edge of strong low level cold air 
advection. By Sunday afternoon, expect snow near sea level to 
begin vicinity Yakutat and spread east and south with measurable 
accumulations all the way down to the Dixon Entrance lasting 
potentially through Tuesday afternoon. 48 hour totals generally in 
the 2 to 4 inch range in a swath of maximum accumulations extending 
southeast from Yakutat to near Wrangell. The cold air will begin 
to retreat to the north by middle week as a low west of Washington 
state at that time begins to track north, bringing warmer low 
level air and a front with it. 

Used a blend of NAM and European model (ecmwf) for updates to pressure and wind 
through Monday night with wpc thereafter. Pop and quantitative precipitation forecast from European model (ecmwf) 
and Gem with some help from GFS at times. Temperatures unchanged. Overall 
forecast confidence is average. 


Ajk watches/warnings/advisories... 
Marine...Small Craft Advisory for pkz012-013-031. 
Small Craft Advisory due to seas for pkz041. 




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