Petersburg, Alaska Weather Conditions

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Current Conditions

  • 43°
  • Rain Showers
  • Wind: SSW 6 mph
  • Humidity: 76%
  • Visibility: 10.0 miles
  • Dew Point: 36°
  • Pressure: 29.77 in. +
  • Heat Index: 39

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Next 12 Hours

5  pm
8  pm
11  pm
2  am
5  am
Overcast
Overcast
Mostly Cloudy
Mostly Cloudy
Chance of Rain
Chance of Rain
Chance of Rain
Chance of Rain
Chance of Rain
Chance of Rain
48°
44°
41°
40°
40°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Chance of Rain
  • High: 48 °
  • Low: 41 °
  • Chance of Rain
  • Tuesday
  • Rain
  • High: 46 °
  • Low: 40 °
  • Rain
  • Wednesday
  • Rain
  • High: 47 °
  • Low: 40 °
  • Rain
  • Thursday
  • Rain
  • High: 48 °
  • Low: 40 °
  • Rain
  • Friday
  • Chance of Rain
  • High: 51 °
  • Low: 38 °
  • Chance of Rain

Forecast for Petersburg, Alaska

Updated: 4:19 PM AKDT on January 26, 2015

  • Sunday

    Chance of showers. Lows overnight in the upper 30s.

  • Sunday Night

    Considerable cloudiness with occasional rain showers. Low 39F. Winds SE at 5 to 10 mph. Chance of rain 60%.

  • Monday

    Cloudy with occasional rain showers. High 48F. Winds ESE at 5 to 10 mph. Chance of rain 50%.

  • Monday Night

    Periods of rain. Low 41F. Winds NE at 5 to 10 mph. Chance of rain 100%. Rainfall around a half an inch.

  • Tuesday

    Periods of rain. High 46F. Winds SE at 10 to 20 mph. Chance of rain 100%. Rainfall may reach one inch.

  • Tuesday Night

    Cloudy. Some light rain is likely. Low near 40F. Winds SE at 10 to 15 mph. Chance of rain 100%.

  • Wednesday

    Periods of rain. High 47F. Winds SE at 5 to 10 mph. Chance of rain 80%. Rainfall around a quarter of an inch.

  • Wednesday Night

    Occasional rain. Low around 40F. Winds ESE at 5 to 10 mph. Chance of rain 80%. Rainfall around a quarter of an inch.

  • Thursday

    Rain showers in the morning will evolve into a more steady rain in the afternoon. High 48F. Winds ESE at 5 to 10 mph. Chance of rain 80%.

  • Thursday Night

    Rain. Low around 40F. Winds light and variable. Chance of rain 80%. Rainfall near a quarter of an inch.

  • Friday

    Cloudy with occasional light rain. High 51F. Winds light and variable. Chance of rain 80%.

  • Friday Night

    Showers in the evening, then partly cloudy overnight. Low 38F. Winds light and variable. Chance of rain 70%.

  • Saturday

    Some clouds in the morning will give way to mainly sunny skies for the afternoon. High 54F. Winds light and variable.

  • Saturday Night

    Clear. Low near 40F. Winds N at 5 to 10 mph.

  • Sunday

    Mostly sunny skies. High near 55F. Winds light and variable.

  • Sunday Night

    Mostly clear skies. Low around 40F. Winds light and variable.

  • Monday

    A few clouds early, otherwise mostly sunny. High 58F. Winds light and variable.

  • Monday Night

    Clear skies with a few passing clouds. Low 41F. Winds light and variable.

  • Tuesday

    Mostly sunny skies. High near 60F. Winds light and variable.

  • Tuesday Night

    Mostly clear skies. Low 42F. Winds light and variable.

  • Wednesday

    Mostly sunny skies. High 56F. Winds light and variable.

  • Wednesday Night

    Partly cloudy. Low 42F. Winds light and variable.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Pearl F Street, Petersburg, AK

Updated: 5:42 PM AKDT

Temperature: 48.0 °F Dew Point: 43 °F Humidity: 82% Wind: North at - Pressure: 29.86 in Hourly Precipitation: - Windchill: 48 °F Graphs

Location: RAWS, Kake, AK

Updated: 4:55 PM AKDT

Temperature: 45 °F Dew Point: 44 °F Humidity: 95% Wind: North at 7 mph Pressure: - Hourly Precipitation: 0.00 in Windchill: 41 °F Graphs

Location: 25AE Otness Subdivision, Petersburg, AK

Updated: 5:45 PM AKDT

Temperature: 44.0 °F Dew Point: 41 °F Humidity: 91% Wind: Calm Pressure: 29.72 in Hourly Precipitation: 0.00 in Windchill: 44 °F Graphs

Location: Papke's Landing, Petersburg, AK

Updated: 5:34 PM AKDT

Temperature: 48.4 °F Dew Point: 46 °F Humidity: 91% Wind: Calm Pressure: 29.80 in Hourly Precipitation: - Windchill: 48 °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 
325 PM akdt sun Apr 26 2015 


Short term...the vertically stacked low over the west central 
Gulf of Alaska will persist into early next week while slowly 
weakening. The associated frontal band will have have spread 
through the Panhandle then arcs back into the eastern Pacific. 
Through late tonight and Monday a developing wave will move north 
along the old front but then approach the southern Panhandle late 
Monday afternoon. 


The rain across the Panhandle is transitioning over to showers. 
There is quite a pool of cooler air aloft as 500 mb temperatures 
ranged as cold as -36 c are moving into the eastern Gulf. This pool 
of cold air along with the lift from an upper level vorticity lobe 
rotates into the region about the upper level low. The additional 
lift will be enough for isolated thunderstorms to develop. They 
should stay primarily off shore but do expect them to likely graze 
chicagof and Baranof islands late tonight and early Monday 
morning. 


Winds are 25 to 30 out over the Gulf of Alaska and outer 
coastal regions. A few of the Inner Channels are up to small craft 
levels but are primarily 20 knots or less. 


Long term...Sun afternoon WV imagery shows a shortwave trough 
over the North Pacific rounding the base of an upper low centered over the 
southern Gulf. Latest model guidance indicates the shortwave will eject 
NE into the northestern Pacific by 06z Tuesday...and then lift north across haida 
gwaii by 15z Tuesday. This feature then moves north over the southern/central 
Panhandle through 00z Wednesday. Deterministic model solutions are 
subsequently converging on the development of a compact surface 
low pressure system moving north into the Panhandle with its parent 
upper trough. The 12z GFS and NAM were faster solutions with the 
northward movement of the low compared to the 12z Gem and European model (ecmwf)...but 
the 18z GFS and NAM have trended toward a slower evolution as well. 


As a result...updated pressure grids reflect a heavier weighting 
toward the Gem/ECMWF...which yields strengthening north-northeasterly winds 
during Tuesday morning that rapidly flip to southerly after the passage of 
the low. Gale force winds appear probable over Clarence Strait as 
this happens...while northerly small craft winds over Lynn Canal during 
Tuesday morning/afternoon will become southerly small craft winds Tuesday night. 
A similar evolution is expected for Stephens Passage as a 30+ knots 
southerly low level jet spreads north by Tuesday afternoon/evening. In addition...gusts 
will approach strong wind criteria over akz027-028 as the southerly low level jet 
develops in the wake of the low Tuesday afternoon. 


Precipitable water values near 0.8 inch are forecast to be drawn northward with the 
previously mentioned surface low...which could aid in periods of 
heavy rain over the southern/central Panhandle during Tuesday. In 
addition...500 mb temperatures near -30 c will spread eastward across 
the southern outside waters and Panhandle as the shortwave trough lifts 
north of the area Tuesday afternoon. Subsequent destabilization will 
result in the redevelopment of a convective environment...as well 
as a slight chance of thunderstorms as minor upper impulses move 
across the area. 


After Tuesday...model guidance remains in fair agreement with the 
large-scale upper air evolution through 00z Sat...with differences 
in the development of an upper ridge becoming more noticeable by 
sun and Monday. GFS and European model (ecmwf) were used for pop/quantitative precipitation forecast through most of 
the week. Wpc was then used for pressure and pop guidance 00z Friday 
and beyond...which was composed of a heavy ensemble blend. 


&& 


Ajk watches/warnings/advisories... 
public...none. 
Marine...Gale Warning for pkz051-052. 
Small Craft Advisory for pkz021-022-033>036-041>043. 


&& 


$$ 


Bezenek/Garner 


Visit US at http://www.Weather.Gov/Juneau 



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