Petersburg, Alaska Weather Conditions

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Current Conditions

  • 55°
  • Overcast
  • Wind: SSE 9 mph
  • Humidity: 77%
  • Visibility: 10.0 miles
  • Dew Point: 48°
  • Pressure: 29.68 in. +

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Next 12 Hours

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Rain Showers
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Chance of Rain
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54°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Monday
  • Rain
  • High: 54 °
  • Low: 46 °
  • Rain
  • Tuesday
  • Overcast
  • High: 55 °
  • Low: 46 °
  • Overcast
  • Wednesday
  • Chance of Rain
  • High: 55 °
  • Low: 46 °
  • Chance of Rain
  • Thursday
  • Chance of Rain
  • High: 54 °
  • Low: 48 °
  • Chance of Rain
  • Friday
  • Chance of Rain
  • High: 55 °
  • Low: 46 °
  • Chance of Rain

Forecast for Petersburg, Alaska

Updated: 1:00 AM AKDT on September 22, 2014

  • Monday

    Overcast with rain, then a chance of rain in the afternoon. High of 54F. Winds from the SE at 5 to 10 mph. Chance of rain 70%.

  • Monday Night

    Overcast with rain. Low of 46F. Winds less than 5 mph. Chance of rain 60%.

  • Tuesday

    Overcast. High of 55F. Winds from the NE at 5 to 10 mph.

  • Tuesday Night

    Overcast. Low of 46F. Winds from the ENE at 5 to 10 mph.

  • Wednesday

    Overcast with a chance of rain in the afternoon. High of 55F. Winds less than 5 mph. Chance of rain 50%.

  • Wednesday Night

    Overcast with a chance of rain. Low of 46F. Winds from the ENE at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.9 in. possible.

  • Thursday

    Overcast with a chance of rain. High of 54F. Winds from the NE at 5 to 10 mph. Chance of rain 80% with rainfall amounts near 0.7 in. possible.

  • Thursday Night

    Overcast with a chance of rain. Low of 48F. Winds from the ENE at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.3 in. possible.

  • Friday

    Overcast with a chance of rain. High of 55F. Winds less than 5 mph. Chance of rain 20%.

  • Friday Night

    Overcast with a chance of rain. Fog overnight. Low of 46F. Winds from the East at 5 to 10 mph. Chance of rain 40% with rainfall amounts near 0.5 in. possible.

  • Saturday

    Overcast with a chance of rain. High of 55F. Winds from the East at 5 to 10 mph. Chance of rain 80% with rainfall amounts near 0.8 in. possible.

  • Saturday Night

    Overcast with rain. Low of 46F. Winds from the East at 5 to 10 mph. Chance of rain 70% with rainfall amounts near 0.9 in. possible.

  • Sunday

    Overcast with a chance of rain. High of 55F. Winds from the East at 5 to 10 mph. Chance of rain 60% with rainfall amounts near 0.2 in. possible.

  • Sunday Night

    Mostly cloudy with a chance of rain. Low of 45F. Winds from the ESE at 5 to 10 mph. Chance of rain 40% with rainfall amounts near 0.4 in. possible.

  • Monday

    Partly cloudy with a chance of rain. High of 55F. Winds from the ESE at 5 to 10 mph. Chance of rain 40%.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 45F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.

  • Tuesday

    Overcast with a chance of a thunderstorm. Fog early. High of 54F. Winds from the ESE at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 43F. Winds from the SE at 5 to 10 mph. Chance of rain 40%.

  • Wednesday

    Overcast with a chance of a thunderstorm. Fog early. High of 54F. Winds from the SE at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.2 in. possible.

  • Wednesday Night

    Overcast with a chance of rain. Fog overnight. Low of 45F. Winds from the SE at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.3 in. possible.

  • Thursday

    Partly cloudy with a chance of a thunderstorm. Fog early. High of 54F. Winds from the ESE at 5 to 10 mph. Chance of rain 50% with rainfall amounts near 0.3 in. possible.

  • Thursday Night

    Clear. Fog overnight. Low of 45F. Winds from the SE at 5 to 10 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: RAWS KAKE AK US, Kake, AK

Updated: 10:55 PM AKDT

Temperature: 51 °F Dew Point: 50 °F Humidity: 98% Wind: NNE at 5 mph Pressure: - Hourly Precipitation: 0.00 in Graphs

Location: Papke's Landing, Petersburg, AK

Updated: 11:59 PM AKDT

Temperature: 52.5 °F Dew Point: 51 °F Humidity: 95% Wind: Calm Pressure: 29.76 in Hourly Precipitation: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Southeast Alaska forecast discussion 
National Weather Service Juneau Alaska 
415 PM akdt sun Sep 21 2014 


Short term...rapidly evolving weather situation this afternoon 
with storm force low in the eastern Gulf moving north. As expected 
there has a quick switch to gusty southerly winds across the 
southern Panhandle with frequent gusts to 40 miles per hour. Rain continues 
to fall over much of the area with the heaviest precipitation 
rates over the northern Panhandle. This will continue to be the 
focus of the heavier rainfall for this evening. 


As the low continues to move north these winds will spread over 
the central and northern areas. A couple of things will aid these 
stronger winds...strong pressure rises as the low pressure system 
jumps inland later this evening, 55-65 knots low level jet moving 
overhead, and cold air advection which will help to destabilize 
the atmosphere and Transfer those winds aloft to the surface. 
Therefore have small craft to gale winds across many of the Inner 
Channels with strong wind headlines for several land zones this 
evening. Winds will gradually diminish overnight...lingering 
longest across the far northern Panhandle including Lynn Canal and 
the Skagway area. 


Significant cold air advection aloft behind the front with 850 mb 
temperatures falling as low as 0 c overnight. This will 
transition to a more unstable environment with showers becoming 
the main precipitation type instead of steady stratiform rain. 
Some of these showers may be heavy at times especially in the 
vicinity of Yakutat. Have included isolated thunderstorms tonight 
and Monday in the Gulf with cape values around 500 j/kg and lifted 
indices around -2 to -3 c. Will need to monitor whether this 
thunderstorm potential could spread into the outer coastal areas. 


Made few changes to the previous forecast as it remained 
consistent with forecaster thinking. Confidence is above average 
in widespread wind event this evening with diminishing winds and 
showers persisting through Monday afternoon. 


Long term...by Monday night the current storm in the eastern Gulf will 
be dissipating and jumping inland into the Yukon. European model (ecmwf) and GFS 
trend toward a brief dry period middle week...especially northern 
Panhandle. New upper level low center approaches southern 
Panhandle about Wednesday for slowly increasing chance of rain again 
over southern zones. Forecast confidence in the overall trend is high. 


Main effort today was focused on transitioning from very strong 
storm causing high winds and seas to a drier and calm pattern by 
Tuesday. An upper level trough moves east across the interior of Alaska 
Monday and Tuesday and passes to our north. Expect north winds to 
increase northern Inner Channels after this feature passes 
through. There is a possibility of localized strong gap winds 
starting about Tuesday night as well but I did not add this detail in 
the gridded forecasts yet. 


Wednesday into Thursday the ec and GFS indicate the northern Panhandle will 
be situated between the upper trough to our north-NE and a closed low 
centered west of Vancouver Island. This pattern usually results in 
dry weather and very light winds. As a result we will have to 
watch out for chilly temperatures and perhaps areas of frost Tuesday 
morning and then the possibility of another fog episode Wednesday-Thursday 
time frame as the North-East winds diminish. The closed low to our south is 
predicted to edge its way north from Thursday through the 
weekend...eventually reaching west of haida gwaii...gradually wrapping 
more clouds and light precipitation into mainly the southern half of the 
Panhandle late in the week. 




&& 


Hydrology...moderate to heavy rain over the northern Panhandle 
has resulted in rises on area creeks and rivers. Water levels are 
only expected to reach bankfull but the situation will continue 
to be monitored. A Special Weather Statement has been issued with 
additional details. 


&& 




Ajk watches/warnings/advisories... 
public...strong wind until 7 PM akdt this evening for akz023-026>028. 
Strong wind until 1 am akdt Monday for akz025. 
Strong wind until 10 PM akdt this evening for akz022. 
Strong wind from 10 PM akdt this evening through late tonight for 
akz019. 
Strong wind from 10 PM akdt this evening through Monday 
morning for akz018. 
Marine...Gale Warning for pkz012-013-021-022-031-033-035-036-041>043-051. 
Small Craft Advisory for pkz011-032-034-052-053. 


&& 


$$ 


Tps/ta 


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



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