Petersburg, Alaska Weather Conditions

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Current Conditions

  • 61°
  • Clear
  • Wind: East 4 mph
  • Humidity: 63%
  • Visibility: 10.0 miles
  • Dew Point: 48°
  • Pressure: 30.04 in. 0

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Next 12 Hours

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

5 Day Forecast

  • Tuesday
  • Partly Cloudy
  • High: 76 °
  • Low: 56 °
  • Partly Cloudy
  • Wednesday
  • Rain
  • High: 64 °
  • Low: 54 °
  • Rain
  • Thursday
  • Partly Cloudy
  • High: 69 °
  • Low: 51 °
  • Partly Cloudy
  • Friday
  • Mostly Cloudy
  • High: 71 °
  • Low: 54 °
  • Mostly Cloudy
  • Saturday
  • Chance of Rain
  • High: 67 °
  • Low: 52 °
  • Chance of Rain

Forecast for Petersburg, Alaska

Updated: 10:55 PM AKDT on July 6, 2015

  • Rest of Tonight

    Clear. Lows around 53. Light winds.

  • Tuesday

    Increasing clouds. Highs around 73. Light winds becoming northwest 10 mph in the afternoon.

  • Tuesday Night

    Mostly cloudy. Lows around 54. Northwest wind 10 mph.

  • Wednesday

    Mostly cloudy. Slight chance of light rain. Highs around 66. Northwest wind 10 mph.

  • Wednesday Night

    Mostly cloudy. Chance of light rain. Lows around 52. Northwest wind 10 mph.

  • Thursday

    Mostly cloudy. Highs around 65.

  • Thursday Night

    Partly cloudy. Lows around 51.

  • Friday and Friday Night

    Mostly cloudy. Highs around 65. Lows around 51.

  • Saturday

    Mostly cloudy. Chance of rain. Highs around 64.

  • Saturday Night through Monday

    Mostly cloudy. Chance of rain. Lows around 53. Highs around 65.

Severe Weather Alert Descriptions

 Record Report  Statement as of 1:23 am AKDT on July 7, 2015

... New record high for July 6 at Annette Island...

The record high temperature for July 6 of 81 f set in 1958 was
shattered with a sweltering 88 f today on Annette Island.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Pearl F Street, Petersburg, AK

Updated: 2:56 AM AKDT

Temperature: 56.8 °F Dew Point: 52 °F Humidity: 83% Wind: North at - Pressure: 30.12 in Hourly Precipitation: - Graphs

Location: 25AE Otness Subdivision, Petersburg, AK

Updated: 2:59 AM AKDT

Temperature: 56.0 °F Dew Point: 52 °F Humidity: 87% Wind: Calm Pressure: 29.98 in Hourly Precipitation: 0.00 in Graphs

Location: Papke's Landing, Petersburg, AK

Updated: 3:00 AM AKDT

Temperature: 54.9 °F Dew Point: 52 °F Humidity: 89% Wind: Calm Pressure: 30.06 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 
331 PM akdt Monday Jul 6 2015 

Short term...biggest issue over the next 24 hours is the extent 
of the marine stratus tonight and Tuesday morning. This morning 
the low clouds and fog made it as far east as Sisters Island in 
Icy Strait. Expect a similar scenario tonight but concerned it 
could make it a bit farther inland as the ridge begins to weaken 
and tip over due to shortwave energy over the central Gulf. Did 
bring it a little farther inland into Peril Strait and Tenakee 
Inlet. Also included some drizzle along the outer coast. As the 
ridge begins to weaken on Tuesday, this will allow more mainly 
high cloud cover to spread over the Panhandle on Tuesday. A weak 
area of low pressure associated with the energy mentioned above 
will push a band of rain into the Yakutat area by midday Tuesday. 
With weak forcing am expecting rain to be on the lighter side. 

Very warm temperatures across Southeast Alaska this afternoon with 
many locations across the southern Panhandle well into the 80s. 
Some locations such as Hyder will likely reach 90 degrees this 
afternoon. Slightly cooler conditions can be expected on Tuesday 
but temperatures are still expected to get into the low 80s over 
the southern Panhandle with 90 degrees possible again in Hyder. 
Over the northern Panhandle cooler air aloft combined with 
increasing cloud cover will lead to highs being 5 to 10 degrees 
cooler than today. Winds will follow the same general diurnal 
trends as the previous few days. Small craft winds near Cross 
Sound and Cape Decision will weaken later this evening as solar 
heating subsides. Lighter winds will be felt overnight with sea 
breezes picking up again Tuesday morning. However with cooler 
temperatures and increasing clouds, sea breezes will likely be a 
bit weaker than today. 

Mainly used the hi-res nmm for updates to the forecast through 24 
hours. Changes were small and generally limited to local effect 
changes. Forecaster confidence is average through Tuesday 

Long term...while the Panhandle will will undergo a shift in 
weather pattern at the start of the long range the upper level 
features don't show as much change through the week. Not counting the 
trough that moves across the northern Gulf Tuesday evening the 500 
mb pattern keeps some form of a low over the Bering Sea, a high 
pressure ridge over the Alaska Gulf and a second low located over 
northern Canada. However each of these main features do move 
enough to make some uncertainty in the extended forecast. 

The Tuesday night trough crosses the Gulf and moves over the 
Panhandle through the day on Wednesday with high pressure rebuilding 
over the Alaska Gulf. With weak forcing along the wave believe precipitation 
will hit the northern Panhandle coast but shear apart and not make 
it much further inland, so have kept only chance probability of precipitation. Any rain 
fall that does make it should be light. Temperatures will drop with the 
increased cloud cover and diminishing 850 mb temperatures but as the 
ridge rebuilds on Thursday seeing 850 mb temperatures increase again and 
have some potential for clear breaks developing, especially over 
the southern Panhandle. Warmed up temperatures there just a bit for 
Thursday and Friday. What this late week pattern is lacking 
compared to today's set up is the inverted trough extending over 
the Panhandle, so high will only be in the 70s. Question as the 
ridge rebuilds over the Gulf will be if marine layer forms and if 
the onshore flow move that layer all the way inland. 

With the exception of northern Lynn Canal which will remain at 
small craft levels Tuesday night due to the tight pressure 
gradient, winds will be less than 20 knots Tuesday and Wednesday 
with overland winds becoming light. Wind direction for the central 
Inner Channels was bit tricky Tuesday, as pressure gradient would keep 
them more southerly, but flow around the ridge would be northerly. 

By the weekend there are indications of another shortwave 
crossing into the northern Gulf Friday night into Saturday with a 
more substantial surface low potentially making it into the central 
Gulf late Monday. Still bit early to put much confidence in this. 

Models fell in line with the 12z runs and had good agreement for 
the pressure pattern through day 6. Used a blend of the 12z 
European model (ecmwf)/Gem for pressure as the NAM was bit off on short wave 
location and the GFS had some issues over the Panhandle. Most 
model pop fields seemed a bit high so kept with inherited fields. 
Overall changes were minor with a few direction tweaks due to the 
updated pressure field. Forecast confidence is average. 


Hydrology...above normal temperatures will lead to a rise in the 
taiya river during the afternoon and evening hours over the next 
couple of days. The river will then follow the usual diurnal 
cycle of falling during the early morning hours. At this time the 
river is expected to crest around 16 feet both Tuesday and Wednesday 
afternoon. This will continue to be monitored through middle week 
before cooler temperatures move into the area. 


Ajk watches/warnings/advisories... 
Marine...Small Craft Advisory for pkz012-022-033-041-042. 
Small Craft Advisory due to seas for pkz052. 




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