Tag Archives: warm front

NYC Weekend Weather – Oct 7, 2015

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The three day weekend ahead will feature some idyllic autumn weather with plenty of sun for outdoor activities if you’re heading out of town on a getaway. The only blemish in this otherwise stretch of superb weather will be a round of showers and thunderstorms entering the city Friday afternoon and passing through Friday night.

Rest of today – we’re starting off with mostly cloudy skies, but skies should clear rapidly within the next couple hours. After that, we get a mostly sunny afternoon with high temperatures near 70. Clouds re-enter the picture later this evening in advance of an approaching disturbance that will bring us rain on Friday.

Friday – overnight tonight, a warm front will push through the area, such that by Friday morning, winds will switch to the southwest. This will allow for warm air to surge up ahead of a cold front that will be passing through Friday night. This setup is favorable for the possible development of thunderstorms ahead of the cold front. Chances for rain increase steadily Friday into Friday night. Otherwise, mostly cloudy skies with high temperatures in the upper-70s to near 80.

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Saturday – the cold front moves quickly through the area Friday and by Saturday, skies should clear up, while temperatures cool off into the mid-60s.

Sunday – another picture perfect autumn day with high temperatures in the mid-60s and ample sunshine.

Monday (Columbus Day) – stretch of nice weather continues into Columbus Day, with temperatures slightly warmer in the upper-60s to around 70.

Drought Update

The drenching rains two weeks ago helped alleviate drought conditions over large portions of the Northeast. However, moderate drought conditions stubbornly persist in the NYC metro area, especially in Long Island.

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NYC Weather Update – Jul 13, 2015

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This week will feature two contrasting airmasses, with the beginning of the week influenced by a warm, humid airmass, before a cold front Wednesday brings some relief from the heat and humidity and brings in cooler, drier air. A warm front, then this cold front, along with the warm temperatures and humidity will lead to the chance for showers and thunderstorms through Wednesday.

Rest of today – warm, humid, with hazy skies and a high in the mid-upper 80s.

Tuesday – a warm front approaches the area from the southwest then stalls to our south. Winds shift to the southeast, providing somewhat of a cooling effect with a sea breeze. However, inland areas should still see temperatures well into the mid-80s. A wave of low pressure will be sliding east along the stalled frontal boundary during the day Tuesday, however, the best chances for rain and thunderstorms associated with this wave look to be confined to areas well west of NYC. A spotty shower or thunderstorm cannot be ruled out in the city.

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Wednesday – as the stationary front from Tuesday moves away, a cold front will be pushing through the region on Wednesday. This will allow for the chance of rain and thunderstorms to persist. Chances for precipitation Wednesday are overall lower than Tuesday, and it will be a set up where most of the area stays dry, with only a few locations picking up appreciable rainfall from a passing storm. Highs will continue to be warm in the mid-upper 80s ahead of the cold front passing through.

Thursday – following the passage of the cold front, high pressure will build over the region. Clockwise flow around this high pressure will usher in refreshing, drier air with a north wind. Temperatures on Thursday will be cooler, in the low-80s.

NYC Weather Update – Jun 30, 2015

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This short holiday week will feature decent weather for the most part, with the exception of Tuesday night into Wednesday morning. As of now, it does appear that there will be a chance of showers/thunderstorms on July 4th itself, however, uncertainty and considerable disparities between different forecast models has been noted by forecasters. We should have a clearer picture of the situation later this week.

Rest of today – clouds gradually increase in coverage during the day today with high temperatures in the low-80s. Overnight, chances for rain will steadily pick up as a warm front approaches the area from the south and west.

Wednesday – a mostly cloudy day with highs in the low-mid 80s. There is a good chance for showers early on in the day. However, the chance of rain starts to diminish in the afternoon, and it is unclear if there will be enough instability remaining in the atmosphere following the passage of the warm front above to support more rain or storms.gfs_namer_033_1000_850_thick

Thursday – a cold front following on the heels of the warm front mentioned above will mean that there is still a chance for showers and thunderstorms as that frontal boundary approaches. Temperatures should be similar to Wednesday, in the low-mid 80s.

Looking ahead at the holiday weekend, it looks like both Friday and Sunday should be mostly sunny with temperatures in the low-80s. There is a small chance for rain and thunderstorms for Independence Day, but there is enough forecast uncertainty in the forecast models to hope for a dry day Saturday as well.

NYC Weather Update & TS Bill – Jun 16, 2015

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We’ve certainly seen plenty of rain during the month of June, yet the NYC region remains in an area of moderate drought as of last Thursday. However, this does not reflect the rain that fell overnight Sunday into Monday. After a gloomy start to the week, we get a break of decent weather tomorrow, before another possible round of rain Thursday. The week ends with some drying out and improving conditions.

Rest of today – highs should top out in the upper-70s to around 80 today, with the potential for showers and thunderstorms later this afternoon. Storms have already formed to our west over northeastern Pennsylvania, but there is a stabilizing marine air layer over NYC and points east, so these storms may yet break apart before reaching us.

 

High Resolution Rapid Refresh model simulated radar for 1PM today.
High Resolution Rapid Refresh model simulated radar for 1PM today.

Wednesday – skies will clear rapidly overnight and lead to a sunny, dry, and pleasant day on Wednesday. Highs should be near 80. The high pressure creating these pleasant conditions will not stay around long, as another warm front approaches from the west.

Thursday – will look a lot like today, with mostly cloudy skies, and a potential for showers and thunderstorms in the afternoon as a warm front nears the region. Highs will be a bit cooler in the mid-70s with the influence of clouds and a southeasterly flow off the ocean ahead of the warm front.

Friday – the warm front from Thursday is followed quickly by a cold front passing Friday morning. Behind this, high pressure takes control and brings decent weather for the first half of the weekend. Highs Friday should be in the low-80s with clouds and sun.

 

Tropical Storm Bill

Over the weekend, a disturbance organized over the western Gulf of Mexico, and by last night it had consolidated and intensified enough to be designated the 2015 Atlantic Hurricane Season’s second named tropical cyclone – Tropical Storm Bill. Bill will be making landfall imminently in Texas as a moderate strength tropical storm with maximum sustained winds of 60mph.

Satellite image of Tropical Storm Bill about to make landfall on the central Texas Gulf Coast
Satellite image of Tropical Storm Bill about to make landfall on the central Texas Gulf Coast

However, for people living in the path of Bill, it is not the wind but rather the potential for dangerous flash flooding that is the primary concern with this storm. Bill is forecast to bring as much as 10″ of rain over the next few days to parts of Texas, and upwards of 6″ for a wide swath of Oklahoma and Missouri. As you may recall, some of these areas were the scene of deadly flooding just a few weeks back, and the arrival of a rainmaker like Bill is most unwelcome for these areas that are still in the midst of recovering. Moisture from Bill will eventually work its way into our region, but in a much less intense way.

Forecast rainfall totals for TS Bill
Forecast rainfall totals for TS Bill

NYC Weekend Weather – Jun 11, 2015

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We will likely be experiencing one of the hottest days of the year so far, with temperatures expected to top out in the upper-80s and into the low-90s in a few spots this afternoon. The warm weather continues through Saturday, when an area of high pressure over eastern Canada brings us some relief from the heat. In terms of the weekend, Sunday will definitely be the better day, with cooler temperatures, but dry weather.

Rest of today – temperatures are expected to top out right around 90 in the city. Increasingly humid air will lead to an uncomfortable feeling day. There is some potential for thunderstorms, some possibly marginally severe, occurring in the afternoon hours as a cold front approaches from the north and west. The orientation of the frontal boundary and primary storm vector will align in such a way that training of storms could occur, leading to the same locations getting hit by multiple storm cells.

In addition, an air quality alert is active today, with PM2.5 particle being the primary driver in pushing the Air Quality Index into the low 100s (unhealthy for sensitive groups).

High Resolution Rapid Refresh model simulated radar composite for 4PM EDT.
High Resolution Rapid Refresh model simulated radar composite for 4PM EDT.
Air quality forecast for today
Air quality forecast for today

Friday – the cold front that pushes through today with some possible thunderstorms will stall just south of the area, then push back north through the area as a warm front Friday. This means we will not get any respite from the heat, with highs again expected to be in the upper-80s to near 90, and another chance at more thunderstorms. There will be more sun Friday than today, but atmospheric dynamics are not expected to be supportive of severe weather.

Saturday – the warm front that passes through Friday comes back yet again as a cold front as it gets dragged along by the low pressure center moving to the northeast. This means yet another chance for thunderstorms, and ahead of that, warm temperatures remaining in the upper-80s.

Sunday – the weather finally settles down and stabilizes as a high pressure center builds to the north in behind the cold front passing on Saturday. This should lead to cooler temperatures and sunny skies for Sunday, when temperatures are expected to be in the low-80s.

 

 

 

 

 

 

 

 

 

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Monday – another frontal boundary will be making its approach from the west on Monday, however, the timing of its approach is such that chances for rain will be low on Monday. Temperatures should again be comfortable around 80.

NYC Weather Update – Apr 7, 2015

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This will be my last post for another few weeks as I will be traveling in South America. This week, we have an active weather pattern that will lead to a series of periods of rain. Mid-week, temperatures will be well below normal (mid-40s), but towards the end of the week, through the weekend, and to begin next week, temperatures will rebound to slightly above normal (low 60s).

Today – we’ve already had a round of light to moderate rain pass through earlier this morning. The rest of the day will feature temperatures falling through the 50s, along with overcast skies and a light onshore flow. A second round of rain looks set to hit the area around the evening rush hour today.

High Resolution Rapid Refresh model output for 5PM today.
High Resolution Rapid Refresh model output for 5PM today.

Wednesday – a raw, rainy, and cold day is in store tomorrow. A stationary front (the reason for the extended period of unsettled weather) will push through late Tuesday as a cold front. This will allow for much colder air from Canada to enter the area, which will lead to temperatures only in the mid-40s (10-15º below normal). Periods of rain are likely throughout the day and into the night.gfs_namer_021_1000_850_thickThursday – essentially a repeat of Wednesday, with chances for rain through out the day, and cold, cloudy conditions otherwise. High temperatures again only in the mid-40s.

Friday – chances for rain continue through Friday as a warm front will be approaching from the south. Once this front pushes through, we’ll see a return to milder temperatures with highs in the low 60s (about 5-8º above normal).

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The Weekend – conditions finally begin to improve on Saturday with a cold front having pushed through. Chance for precipitation dwindles, with highs in the low 60s. Sunday is even better with clear skies and warm temperatures near 60.

Warm Trend for Next Week

Climate Prediction Center has our region in an area of greater than 50% chance of above average temperatures for next week. This should translate to pleasant, spring like conditions for next week!

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NYC Weekend Weather – Apr 2, 2015

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We’re finally getting a run at some spring-like weather with highs above normal to end the work week. We’ll get some of those April showers that we’re hoping will lead to a fantastic display of spring flowers later this month and May. A cold front passing through Saturday will knock temperatures back a notch, and then we enter into a period of active weather dictated by a stalled frontal boundary the first half of next week.

Today – warm and breezy, with a high near or just over 60. Clouds increasing late, as a warm front approaches from the south. A chance of showers develops overnight as this warm front continues moving towards us.

 

Friday – an even warmer day on tap, with that aforementioned warm front having passed through. We’ll be in the warm sector until later when a cold front moves through. High temperatures, despite rain and clouds, should still be able to top out in the lower 60s.

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Saturday – with the cold front passing through, temperatures will drop on Saturday, back to about normal in the lower 50s. Partly sunny skies will slowly give way to more clear conditions.

Sunday – Sunday through Wednesday will be rather interesting. A frontal boundary is expected to push through Sunday, however, it is then expected to stall in our vicinity for a few days. As waves of low pressure ride along this stalled frontal boundary, the chance for showers persists through Wednesday.

A nice start to next week with above average high temperatures Monday and Tuesday in the mid-upper 50s along with those chances for rain.

NYC Weather Update – Mar 22, 2015

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This upcoming week will feature some big swings in temperature, with high temperatures increasing steadily up through Thursday, when highs could 60 before a cold front swings through. Following the passage of this cold front, we dip back into the mid-40s and continue cooling into the lower-40s this weekend. The temperature trend in the medium term remains below normal, potentially well below normal even through the first week of April, as a series of cold fronts continue to allow cold Canadian air to enter the area.

Monday – an area of high pressure will yield a sparkling sunny day, but will also permit cold, Arctic air back into the region. Northwest winds combined with noticeably cold overnight lows will produce uncomfortably cold conditions. High temperatures Monday may barely break freezing. It’ll be one of the coldest day we’ve had this month.

Tuesday – also gets off to a chilly start, but high temperatures are expected to push up to around 40 (which is more than 10ºF colder than normal).

Wednesday – a clear start, but clouds will be building ahead of a warm front that will pass over the region late Wednesday. Temperatures will steadily climb to near 50, especially after the warm front passes. There will be a slight chance for rain later Wednesday in conjunction with this frontal passage.

Thursday – highs will near if not break 60, however, it is anticipated to be a overcast day with periods of rain possible throughout the day. After the warm front passes Wednesday, we’ll be firmly within the warm sector, between the warm front to our east and the approaching cold front from the west. This setup favors the influx of warm, moist air from the Gulf riding in on persistent southwesterly winds, before a dramatic shift following the cold front passing, with winds becoming west-northwest and a drop in temperatures.9khwbg_conus

 

Friday – high temperatures drop back in to the mid-40s, as clouds break apart and colder, dry air takes hold behind the cold front.

Below Normal Start to April

It’s close to a sure bet (70% probability) that we’ll end the month of March and start April with below normal temperatures, taking a look at the Climate Prediction Centers forecasts below. I know we’re all sick of this seemingly endless winter, but we’re still not out of the woods in terms of temperatures.

6-10 temperature outlook from the Climate Prediction Center
6-10 temperature outlook from the Climate Prediction Center
8-14 temperature outlook from the Climate Prediction Center
8-14 temperature outlook from the Climate Prediction Center

 

NYC Weekend Weather – Mar 13, 2015

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The weekend gets off to a wet start, with rain beginning overnight and Saturday a complete washout. By Sunday, conditions will improve and there will be a slight warmup to start the week, before we return to below normal temperatures by mid-week next week.

Rest of Today – increasing clouds will be a precursor for rain later in the overnight hours. If you plan on being out past midnight (really more like 2AM), grab an umbrella just in case. The bulk of the rain doesn’t look to begin until after 2AM, however, once it starts, it will be essentially continuous until Saturday evening. Prior to the passage of a warm front late overnight into Saturday morning, overnight lows may be cold enough to support some mixing of sleet for a brief period in the city. There is actually a freezing rain advisory for northern areas, where a colder thermal profile could support some freezing rain.

Simulated radar image for 3AM EST, Saturday, Mar 14, 2015. High Resolution Rapid Refresh model.
Simulated radar image for 3AM EST, Saturday, Mar 14, 2015. High Resolution Rapid Refresh model.

Saturday – it will actually be a mild day on Saturday subsequent to the passage of the warm front mentioned above. Any freezing rain/sleet that occurs early in the morning will quickly transition to rain, increasing in intensity during the morning. High temperatures near 50, combined with drenching rain, should be enough to finally washout any remaining snowpack near the city (although places like Long Island that got more snow this season will probably see it persist).

Sunday – there could be a couple remaining sprinkles Sunday morning, but overall, this should be a dry day, partly sunny, and breezy day. High temperatures will be near normal around the mid-40s.

Monday – it’ll be a nice day Monday with a warm front passing through, and high temperatures in the normal range near 50.

Tuesday – another day of normal temperatures near 50. A cold front pass through by Wednesday, which will lead to a cooler than normal day.

NYC Weather Update – Mar 2, 2015

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March will start off with quite an active, messy week for us. During the middle of the week, we’ll see snow, rain, and then more snow, before we end off the week with temperatures well below normal once again.

Tuesday – clouds will begin to increase throughout the day with chances for snowfall increasingly steadily as well. Not much in the way of accumulating snow is expected during the day Tuesday. High temperatures around 30.

Wednesday – overnight Tuesday into Wednesday, temperatures will actually rise as a warm front pushes through. This will allow temperatures on Wednesday to top 40. Snow early on will give way to sleet, then eventually transition to all rain. This period of rain should melt some of the existing snowpack, and there could be some minor/nuisance flooding of poor drainage areas as this occurs.

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Thursday – once the cold front depicted above pushes through late Wednesday, cold air will rapidly fill in behind it and allow for temperatures to drop back into the mid-20s. As this occurs, a second wave of low pressure is expected to form over the Mid-Atlantic and move over the area. This may lead to enough precipitation to warrant a Winter Storm Warning, with 6″ of snow possible by Thursday afternoon. Highs will be near 30. gfs_namer_066_1000_850_thick

 

Friday – as these storms finally move away, Friday will be a sunny day, but with Arctic air back in place over the area, we’ll be once again welcoming high temperatures in the mid-20s, which at this point is over 15 degrees below normal.