Block Island, Rhode Island Weather Conditions

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Current Conditions

  • 73°
  • Clear
  • Wind: SSW 15 mph
  • Humidity: 83%
  • Visibility: 10.0 miles
  • Dew Point: 68°
  • Pressure: 29.82 in. -

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Next 12 Hours

11  pm
2  am
5  am
8  am
11  am
Fog
Fog
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Mostly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
Partly Cloudy
73°
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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Wednesday
  • Partly Cloudy
  • High: 79 °
  • Low: 64 °
  • Partly Cloudy
  • Thursday
  • Clear
  • High: 77 °
  • Low: 66 °
  • Clear
  • Friday
  • Partly Cloudy
  • High: 77 °
  • Low: 66 °
  • Partly Cloudy
  • Saturday
  • Chance of a Thunderstorm
  • High: 77 °
  • Low: 64 °
  • Chance of a Thunderstorm
  • Sunday
  • Chance of a Thunderstorm
  • High: 73 °
  • Low: 61 °
  • Chance of T-Storms

Forecast for Block Island, Rhode Island

Updated: 11:00 PM EDT on September 02, 2014

  • Tuesday

    Partly cloudy. Fog early. High of 81F. Winds from the SW at 10 to 15 mph.

  • Tuesday Night

    Mostly cloudy. Fog overnight. Low of 72F. Breezy. Winds from the SW at 15 to 20 mph.

  • Wednesday

    Partly cloudy in the morning, then clear. High of 79F. Winds from the West at 10 to 15 mph.

  • Wednesday Night

    Clear. Low of 64F. Winds from the NW at 5 to 10 mph.

  • Thursday

    Clear. High of 77F. Winds from the NW at 5 to 10 mph shifting to the SSW in the afternoon.

  • Thursday Night

    Partly cloudy. Low of 66F. Winds from the SW at 5 to 10 mph.

  • Friday

    Partly cloudy in the morning, then clear. High of 77F. Winds from the SSW at 10 to 15 mph.

  • Friday Night

    Partly cloudy in the evening, then clear. Low of 66F. Breezy. Winds from the SW at 15 to 20 mph.

  • Saturday

    Overcast in the morning, then partly cloudy with a chance of a thunderstorm and rain. High of 77F. Breezy. Winds from the SW at 15 to 20 mph. Chance of rain 20%.

  • Saturday Night

    Partly cloudy with a chance of a thunderstorm and rain. Fog overnight. Low of 64F. Winds from the WSW at 5 to 15 mph shifting to the NW after midnight. Chance of rain 70% with rainfall amounts near 0.4 in. possible.

  • Sunday

    Overcast with a chance of rain. High of 73F. Winds from the NNE at 10 to 15 mph. Chance of rain 70% with rainfall amounts near 0.2 in. possible.

  • Sunday Night

    Mostly cloudy with a chance of rain. Low of 61F. Winds from the NE at 10 to 15 mph. Chance of rain 20%.

  • Monday

    Partly cloudy. High of 73F. Breezy. Winds from the NE at 15 to 20 mph.

  • Monday Night

    Clear. Low of 61F. Breezy. Winds from the NE at 10 to 20 mph.

  • Tuesday

    Clear. High of 73F. Winds from the ENE at 5 to 15 mph.

  • Tuesday Night

    Partly cloudy. Low of 63F. Winds from the ENE at 5 to 10 mph.

  • Wednesday

    Mostly cloudy. High of 70F. Winds from the ENE at 5 to 15 mph.

  • Wednesday Night

    Partly cloudy. Low of 64F. Winds less than 5 mph.

  • Thursday

    Mostly cloudy with a chance of rain. High of 73F. Winds less than 5 mph. Chance of rain 40%.

  • Thursday Night

    Mostly cloudy with a chance of rain. Fog overnight. Low of 64F. Winds less than 5 mph. Chance of rain 40%.

  • Friday

    Mostly cloudy. Fog early. High of 73F. Winds from the South at 5 to 10 mph.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 63F. Winds less than 5 mph.

  • Saturday

    Clear. Fog early. High of 72F. Winds less than 5 mph.

  • Saturday Night

    Clear. Fog overnight. Low of 63F. Winds less than 5 mph.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Block Island Water Tower, New Shoreham, RI

Updated: 10:08 PM EDT

Temperature: 71.9 °F Dew Point: 69 °F Humidity: 93% Wind: SW at 16.3 mph Pressure: 29.63 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Champlins Road - near Coast Guard, Block Island, RI

Updated: 10:07 PM EDT

Temperature: 73.7 °F Dew Point: 72 °F Humidity: 93% Wind: South at 12.0 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: West Beach Quonnie, Quonochontaug, RI

Updated: 9:52 PM EDT

Temperature: 72.5 °F Dew Point: 71 °F Humidity: 94% Wind: North at 8.0 mph Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Quonnie, Charlestown, RI

Updated: 10:08 PM EDT

Temperature: 72.5 °F Dew Point: 71 °F Humidity: 94% Wind: NNE at 5.0 mph Pressure: 29.76 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: RAWS NINIGRET RI US, Wakefield, RI

Updated: 9:25 PM EDT

Temperature: 72 °F Dew Point: 70 °F Humidity: 94% Wind: WSW at 3 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Near Charlestown Beach, Charlestown, RI

Updated: 9:59 PM EDT

Temperature: 72.3 °F Dew Point: 72 °F Humidity: 100% Wind: WNW at 1.0 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Snug Harbor, RI, Wakefield, RI

Updated: 10:08 PM EDT

Temperature: 72.5 °F Dew Point: 71 °F Humidity: 95% Wind: NE at 4.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Westerly, RI

Updated: 9:55 PM EDT

Temperature: 72.6 °F Dew Point: 71 °F Humidity: 94% Wind: SSE at 3.0 mph Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Pasquiset Pond, Charlestown, RI

Updated: 9:54 PM EDT

Temperature: 74.0 °F Dew Point: 71 °F Humidity: 91% Wind: SSW at 3.0 mph Pressure: 29.75 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: APRSWXNET Westerly RI US, Westerly, RI

Updated: 9:24 PM EDT

Temperature: 74 °F Dew Point: 71 °F Humidity: 91% Wind: Calm Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Shannock Rd, Charlestown, RI

Updated: 10:07 PM EDT

Temperature: 73.0 °F Dew Point: 72 °F Humidity: 97% Wind: Calm Pressure: 29.73 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Stone Cove Marina, Wakefield, RI

Updated: 10:08 PM EDT

Temperature: 73.8 °F Dew Point: 72 °F Humidity: 96% Wind: SSW at 10.0 mph Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: Narragansett, Narragansett, RI

Updated: 10:03 PM EDT

Temperature: 73.7 °F Dew Point: 71 °F Humidity: 91% Wind: SSW at 3.0 mph Pressure: 29.73 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: APRSWXNET Westerly RI US, Pawcatuck, CT

Updated: 9:34 PM EDT

Temperature: 73 °F Dew Point: 69 °F Humidity: 86% Wind: Calm Pressure: 29.83 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Fishers Island, Fishers Islandd, NY

Updated: 9:57 PM EDT

Temperature: 74.4 °F Dew Point: -33 °F Humidity: - Wind: SSW at 1.0 mph Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: CRN URI PECKHAM FARMS KINGSTON 1 W RI US, Kingston, RI

Updated: 9:00 PM EDT

Temperature:  °F Dew Point: - Humidity: 90% Wind: North at 3 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: CRN URI PLAINS ROAD KINGSTON 1 NW RI US, Kingston, RI

Updated: 9:00 PM EDT

Temperature:  °F Dew Point: - Humidity: 89% Wind: North at 3 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Bonnet Shores Beach Club, Narragansett, RI

Updated: 10:08 PM EDT

Temperature: 74.7 °F Dew Point: 72 °F Humidity: 91% Wind: SW at 11.0 mph Pressure: 29.77 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: West Passage of Narragansett Bay, near Beavertail, Jamestown, RI

Updated: 10:08 PM EDT

Temperature: 73.0 °F Dew Point: 72 °F Humidity: 97% Wind: SW at 15.0 mph Pressure: 29.73 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Montauk School, NY

Updated: 10:08 PM EDT

Temperature: 73.0 °F Dew Point: 71 °F Humidity: 94% Wind: ESE at 2.0 mph Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Canonchet Woods, Hopkinton, RI

Updated: 10:07 PM EDT

Temperature: 74.1 °F Dew Point: 74 °F Humidity: 99% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: Masons Island Marina, Stonington, CT

Updated: 10:08 PM EDT

Temperature: 75.9 °F Dew Point: 72 °F Humidity: 88% Wind: SSW at 2.9 mph Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Hawks Nest Point, Fishers Island, NY

Updated: 10:08 PM EDT

Temperature: 75.9 °F Dew Point: 71 °F Humidity: 85% Wind: South at 12.0 mph Pressure: 29.78 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Richmond, Richmond, RI

Updated: 10:08 PM EDT

Temperature: 72.7 °F Dew Point: 71 °F Humidity: 95% Wind: Calm Pressure: 29.81 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Noank, Noank, CT

Updated: 10:08 PM EDT

Temperature: 74.8 °F Dew Point: 75 °F Humidity: 99% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Narragansett, Narragansett, RI

Updated: 9:50 PM EDT

Temperature: 74.5 °F Dew Point: - Humidity: - Wind: North at - Pressure: - Hourly Precipitation: - Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Taunton Massachusetts 
1001 PM EDT Tuesday Sep 2 2014 


Synopsis... 
a cold front will cross the region tonight and will be accompanied 
by scattered showers and thunderstorms. Behind the front drier and 
much less humid air overspreads the area Wednesday and Thursday. 
Humidity will once again increase by the end of the week as the next 
cold front brings the risk for more scattered showers/thunderstorms 
Friday night and Saturday. More autumn-like weather follows Sunday 
and into at least early next week with cooler and less humid 
conditions. 


&& 


Near term /until 6 am Wednesday morning/... 
10 PM update... 
tricky forecast regarding what will occur with ongoing convection 
in New York/NJ/PA this evening. Current timing has this at the box County Warning Area 
border by about 0330z or about 1130pm. Latest mesoscale-scale guidance 
continues to indicate about 1000j/kg of 100mb ml cape values but 
this continues to decline considering we are over an hour from 
sunset now. There is still modest low level jet energy mainly focused with 
the activity across New Jersey...but there is also a significant dip in 
k-values thanks to a broad dry layer across the area. 
Therefore...feel that models may be on to something dissipating a 
lot of this activity as it moves in despite the what is left of 
the instability. Even what is left should be much diminished by 
the time the front associated with it arrives. Therefore...will 
gradually taper probability of precipitation from west-east from chance to slight chance with 
the possibility that some areas east of the Worcester Hills see 
little if any rainfall. Still...will need to monitor this activity 
as it enters the west thanks to that noted spike in shear which 
may at least help keep things modestly organized. Otherwise...will 
also need to watch southern coastal waters should any convection move 
across with that low level jet currently over New Jersey. In sum...could still be 
some thunder left by the time it arrives in ares west of the 
Worcester Hills...with only a very isolated severe threat...but 
expect everything to rapidly weaken as the front swings across southern 
New England. 


Previous discussion... 


Tonight... 


Strong cold front will move across the northeast overnight. This 
front is expected to move into the western zones around 02-04z and 
offshore between 10-12z. Anticipate convection will be ongoing as it 
approaches the region per the amount of surface heating and dynamics 
out ahead of it in western cwa's. By the time it approaches the 
region a good amount of instability will be loss so we may see dying 
convection. However some models...especially the high-res guidance shows 
about 500 j/kg of cape lingering by the time the front approaches. 
On top of the possible instability...850mb low level jet does increase as the 
front approaches and shear values increase as well. In 
fact...guidance shows that 0-6km shear increases to 25kts...but it 
is the 0-1 km shear that increases to 30-40kts. Lastly k-index plume 
moves over the region during this timeframe giving the region the 
moisture it needs for thunderstorms to continue. 


Therefore believe that all the ingredient mentioned above may allow 
for a few strong to perhaps a severe storm as the front moves the 
region. Keep in mind that this is an overnight event which is not in 
the northeast favor per climatology...but conditions do show that a few 
strong storms are possible. Lastly...even though the region did see 
some action today...the atmosphere did bounce back very well after 
the storms passed. 


As the front moves through the k-index value as well as the 
instability do drop after 06z so that the chance for any convection 
to occur dissipates significantly. In fact...the showers and 
thunderstorms from the front will fragment and become very isolated in 
nature by this time frame and may even struggle to reach the East 
Coast. With the amount of moisture in the atmosphere believe that a 
few showers will reach so continued the slight chance pop for now. 


Overnight temperatures will struggle to drop as cloud cover will keep temperatures 
from radiating out overnight and dewpoints will remain in the 70s 
until frontal passage. 


&& 


Short term /6 am Wednesday morning through Wednesday night/... 
tomorrow and tomorrow night... 


Surface front will move offshore by early tomorrow morning as upper 
level trough will push through as well. 850 mb ridge will begin to 
set up over the region allowing for dry air to move into the area. 
This will keep the weather dry for both tomorrow and tomorrow night. 
850 mb temperatures drop down to -14c and with mixing up to 850mb will allow 
for temperatures to reach into the middle to upper 80s. Difference will be the 
humidity as dry air will mix down dropping dews down into the upper 
50s. Winds will be gusty reaching about 20 miles per hour. 


Overnight...with clear skies and winds become light and 
variable...anticipate radiational cooling. Lows will drop into the 
middle to low 50s. A few sites could even drop into the upper 40s 
across CT valley. 


&& 


Long term /Thursday through Tuesday/... 
highlights: 


* dry Thursday/Friday with warmer than normal afternoon temperatures 
* more humid Sat with scattered storms possible 
* trend toward cooler/less humid weather sun into early next week 


Thursday and Friday... 


Dry/quiet weather continues Thursday with high pressure and a dry/stable 
airmass over the region. It will be warm with highs of 80- 
85...cooler along the coast with afternoon seabreezes...however dew 
points remaining in the 50s will provide comfortable humidity levels. 


By Friday the subtropical ridge along the East Coast briefly builds 
northward into southern New England ahead of the next northern 
stream trough. This will result in warmer temperatures with highs well into 
the 80s combined with more humid conditions as dew points climb from 
the 50s into the 60s. Thus a warm and humid day Friday. 


All model guidance including the 12z gefs and new 12z European model (ecmwf) suggest 
jet dynamics/best shear/instability and convergence associated with 
cold front hold off until Sat. Thus slight chance probability of precipitation confined to 
western New England late Friday from a model blend seems reasonable. 
Hence most of the area especially Rhode Island and eastern Massachusetts may remain dry 
Friday. 


Saturday... 


All deterministic and probabilistic /12z gefs and 12z ecens/ guidance 
suggest cold front will move slowly into the region Sat. Temperatures are 
projected to be in the 80s Sat along with dew points in the 60s to near 
70 so this should yield at least marginal instability. The 12z gefs 
suggest a 30-40% probability of up to 1200 j/kg of cape. This 
combined with modest jet dynamics/shear and frontal convergence 
expecting a risk for scattered thunderstorms along with a threat for 
heavy rain as precipitable waters  climb above normal. Could be a few strong storms 
given the parameters mentioned above. 


Sunday... 


Likely our transition day as both ensembles /12z ecens and gefs/ 
suggest front may be slow to clear the coast Sun morning. Thus 
showers may linger early Sunday especially South Coast with a trend 
toward drier weather as the day progresses from northwest to southeast. 


Monday and Tuesday... 


Should be drier...cooler and less humid as front moves offshore. 
However some of the guidance shows uncertainty how far offshore this 
boundary gets. Thus clouds and possible unsettled weather may lurk 
just offshore. Will keep the forecast dry for now. 


&& 


Aviation /02z Wednesday through Sunday/... 
forecaster confidence levels... 


Low...less than 30 percent. 
Moderate...30 to 60 percent. 
High...greater than 60 percent. 


Short term /through Wednesday night/...high confidence in 
trends. 


7 PM update...no major changes from 18z tafs. Showers and T-storms 
over Massachusetts continue to erode. Next round of T-storms over western- 
central New York and PA arrives in western New England 01z-03z then 
weakens as it enters eastern New England. Fog at Nantucket will 
persist and then begin to improve around 06z and especially 09z- 
12z when frontal passage occurs. Earlier discussion below. 


============================================================== 


Tonight...a lull in activity after 00z. Before another round of 
showers with isolated thunder moves through after 03/04z. This 
convection is associated with an approaching cold front which 
will pass through the region overnight. Expect convection to 
weaken as it moves through with brief lowering in ceiling heights. 
Patchy fog is expect ahead of the front and should dissipate as 
it passes through. 


Wednesday into Wednesday night...VFR. Patchy fog in CT valley Wednesday night. 


Kbos terminal...high confidence in trends. May be a shower or 
thundershower in the afternoon. 


Kbdl terminal...high confidence. 


Outlook...Thursday through Saturday... 


Thursday and Friday...high confidence. Mainly VFR conditions other than 
late night/early morning patchy ground fog in the typically prone 
locations. 


Friday night and Saturday...moderate confidence. A period of MVFR- 
IFR conditions expected in low clouds/fog patches and scattered 
showers/thunderstorms. Timing highly uncertain at this point. 


Sunday...any MVFR along South Coast should trend toward VFR with 
potential showers moving offshore. Otherwise VFR prevails 
elsewhere. 


&& 


Marine... 
forecaster confidence levels... 


Low...less than 30 percent. 
Moderate...30 to 60 percent. 
High...greater than 60 percent. 


High confidence through the period Wednesday night. 


Tonight... 
SW flow begins tonight before a cold front passes over the waters 
overnight. Expect a few gusts to around 20 knots are possible as the 
winds shift to the W-NW. A few showers and thunderstorms may move 
over the southern waters by midnight lasting until about 3am. Seas 
may approach 5 feet on the south ocean waters but have low 
confidence and held off on issuing a Small Craft Advisory. Otherwise...some fog may 
lead to visibility reductions tonight before the front passes. 


Wednesday into Wednesday night...quiet boating weather. A few gusts near 15kts 
possible during the day. 


Outlook...Thursday through Saturday... 


Moderate confidence through this period. 


Thursday...high confidence. Weak pressure gradient yields light 
winds and seas along with good visibilities should make for nice 
boating weather. Afternoon seabreezes expected. 


Friday...moderate to high confidence. Near shore southwest wind 
gusts of 20 to 25 knots may develop in the afternoon with good 
mixing over the land. SW wind waves develop especially near shore. 
Dry weather will prevail with a chance of showers/T-storms 
increasing after sunset. 


Friday night and Saturday...moderate confidence. Areas of fog may 
affect the southern waters. Southwest wind gusts around 20 knots 
are expected ahead of an approaching cold front. There will be the 
risk of scattered showers and thunderstorms during the day Saturday with a 
few strong storms possible...wind and heavy rain. 


Sunday...front begins to move offshore slowly but showers may linger 
especially in the morning. 


&& 


Climate... 
Boston Logan Airport reached 93 degrees today. This is the warmest 
temperature in Boston so far this Summer. 


&& 


Box watches/warnings/advisories... 
CT...none. 
Massachusetts...none. 
New Hampshire...none. 
Rhode Island...none. 
Marine...none. 


&& 


$$ 
Synopsis...nocera/dunten 
near term...doody/dunten 
short term...dunten 
long term...nocera 
aviation...nocera/dunten 
marine...nocera/dunten 
climate... 






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