Tag Archives: satellite images

NYC Weekend Weather – Oct 16, 2020

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A slow-moving cold front will bring rain to start the weekend from today into Saturday morning as several waves of low pressure move along this frontal boundary. Much colder air sweeps in behind this cold front with highs around 60ºF Saturday as high pressure builds with skies clearing. Overnight lows in outlying suburbs may be close to freezing, with frost developing. High pressure remains in place into early next week, maintaining dry weather. With the position of the high moving to the northeast, some warmer southerly return flow should help temperatures rebound into the mid-60s.

Rest of today – cloudy, with periods of rain, moderate at times. High temperatures peaking early in the day in the low-60s, dropping through the day. Overnight lows cooling off into the mid-40s as rain continues until perhaps 1-2am.

GOES geocolor visible satellite imagery of the Northeast this morning. Extensive cloudiness and some vertical development is apparent along a cold front that will impact the region Friday into Saturday.

Saturday – rain ending early. Gradual clearing with high temperatures cooler, around 60ºF. Overnight lows again on the cool side, in the mid-40s under mostly clear skies.

Sunday – high temperatures rebound a little into the mid-60s under mostly sunny skies with warmer southerly return flow developing as high pressure moves to the northeast. Overnight lows likewise warming into the mid-50s.

Weather Prediction Center surface forecast for 8AM Sunday, showing high pressure anchored over the Northeast.

Monday – partly sunny with high temperatures in the mid to upper-60s. Overnight lows in the mid-50s.

NYC Weather Update – Aug 23, 2015

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A slow moving cold front brings an unsettled start to the week. Ahead of this cold front, temperatures will rise along with humidity, leading to a late-summer feel. Once this frontal boundary passes, high pressure to the west will allow for a cooler, drier Canadian airmass to enter the region, leading to more seasonable temperatures along with sunny skies.

Rest of today – a mix of sun and clouds continues with a small chance of some rain, with temperatures topping out around average in the low-80s.

Monday – as a cold front approaches from the west, humidity and temperatures will rise along with a south wind. There is some small chance for thunderstorms, especially west of the Hudson. Otherwise, expect a mix of sun and clouds with temperatures in the mid-80s.

Tuesday – with the cold front lingering in our vicinity, a small chance for showers and thunderstorms continues, along with warm and humid temperatures in the mid-upper 80s.

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Wednesday – the cold front finally pushes through Tuesday, and gives way to high pressure building in from the west on Wednesday. This will lead to comfortable temperatures in the low-80s with sunny skies.

Thursday – similar conditions to Wednesday, with sunny skies and a pleasant, comfortable high in the low-80s.

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A Note on the Tropics

We’re about to enter the most active period of the Atlantic hurricane season, and things have definitely picked up in the tropics. A series of monsoonal tropical waves are moving off of the cost of West Africa, giving rise to the potential for a couple of Cape Verde type tropical cyclones. This conveyor belt of tropical waves has already spawned this season’s first hurricane, Danny, which peaked as a major hurricane with winds of 115mph (Category 3) at the end of last week. Danny has weakened considerably, but could still bring some much needed rain to Hispaniola and Puerto Rico in the next couple days. Meanwhile, another tropical wave following on Danny’s footsteps could become Tropical Storm Erika in the coming days. Neither of these storms poses any immediate threat to the United States for the time being.

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NYC Weekend Weather – Aug 20, 2015

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Unsettled weather will be a trend for the end of this week and into the weekend as a cold front pushes through the region. Friday is shaping up to be the worst day with heavy rain with a risk for flash flooding. Conditions improve somewhat Saturday and Sunday, although a chance for showers and thunderstorms cannot be ruled out either day.

Rest of today – slight chance of showers or thunderstorms persists through this afternoon, though the best chances remain west of the Hudson, as was the case yesterday. We’ve hit a humid highin the mid-80s with a mix of sun and clouds above.

Friday – a cold front will be pushing through during the course of the day Friday. As the frontal boundary approaches overnight and into the early morning hours Friday, a slow moving band of heavy rain is expected to form and track from north to south across the area. It appears likely that the heaviest rain will fall in a narrow band during the early morning hours, and that things may already be drying out by the AM rush. High temperatures will be cooler than average with the cloud cover and rain, near 80.

Satellite image of the storm that will be bringing us some heavy rain Friday
Satellite image of the storm that will be bringing us some heavy rain Friday

High resolution rapid refresh simulated radar for 3AM EDT Friday
High resolution rapid refresh simulated radar for 3AM EDT Friday

A chance for showers and thunderstorms continues through Friday. By the end of the day, some areas could pick up between 1-2″ of rain, raising the risk of some flash flooding.

Saturday – although high pressure will be building once the cold front passes on Friday, a chance of showers and thunderstorms continues on the backside of this front. Temperatures will again be below normal with mostly cloudy skies and a high in the low-80s.

 

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Sunday – showers and thunderstorms cannot be ruled out for Sunday, which will end up being nearly identical to Saturday in sensible weather with high temperatures in the low-80s and mostly cloudy skies.

Stunning Satellite Images – Lake Effect Snow

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In my previous post, I discussed the ongoing epic and record breaking lake effect snowstorm that’s absolutely pummeled areas of the Great Lakes snowbelts, with the Tug Hill Plateau area south of Buffalo the worst affected. Snowfall totals yesterday were already approaching 6 feet, and this morning, the snow continues to pile up. Check out this series of satellite images and accompanying analysis. These images are simply stunning in how clearly they demonstrate the powerful effects of lake effect snow.

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Satellite image of the Great Lakes captured by Geostationary Operational Environmental Satellite. You can clearly see bands of lake effect snow streaming across the entire region.

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Weather Prediction Center’s analysis of current surface conditions – note the low pressure center over extreme NE Ontario/SW Quebec

A close up of Lakes Erie and Ontario – luckily for these folks, winds will finally begin shifting tomorrow as that low pulls away and winds shift from ideal direction for long fetches across the lakes to the northwest.

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Really Cool Image – Von Karman Vortex Street

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When air flows are blocked by obstructions, such as buildings, trees, mountain ranges, or in this case, a mountainous island, all sorts of interesting effects can occur. Just as flowing water hitting a rock will form swirling eddies, flowing air has the same tendency, which you can plainly see int he image above. We’re usually not able to see these effects so vividly, though you’ll often feel them in the form of turbulence.

From the Facebook page of the National Weather Service Weather Prediction Center:

One of the lead forecasters at WPC was taking a look at the visible satellite imagery in the Pacific near the Baja California Peninsula and noticed some swirly action. If you take a look, there’s several swirls being caused by a volcanic island called Isla de Guadalupe. There’s also one right next to the coastline. How many can you count!?

We have satellite and radar imagery on our webpage alongside the surface analysis–if you want to take a look, visit our website (www.wpc.ncep.noaa.gov) and take a look under the current weather!