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Everything posted by donsutherland1
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	The forecast is inconsistent with the AFD, which states: .SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/... Our expansive high pressure system remains the dominant weather feature through the short term period. This keeps the tranquil weather pattern going into the weekend. Friday night and Saturday night look mostly clear with minimal cloud cover. During the day Saturday, it is a mostly sunny day. Highs on Saturday will be in the mid to upper 70s. The NBM has consistently shown highs of 77°-79° for Saturday and Sunday. Moreover, if one uses "South Belmar" (Lake Como) and "West Belmar," one gets the warmer forecast. Belmar: South Belmar: West Belmar:
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	October commenced with the arrival of the coolest air mass so far this season. After another very cool day tomorrow, temperatures will quickly moderate, rising to above normal levels by the weekend as an air mass that will challenge or break records in parts of the Upper Midwest moves eastward. Tomorrow will be the coolest day. High temperatures will reach only the middle 60s tomorrow. New York City will see the low temperature bottom out in the lower 50s. Outside the City, widespread 40s are likely. A few of the colder locations could see the temperature bottom out in the 30s. A rapid warmup will commence on Friday and a warm weekend lies ahead. The ENSO Region 1+2 anomaly was -0.1°C and the Region 3.4 anomaly was -0.5°C for the week centered around September 24. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.12°C and the ENSO Region 3.4 anomaly has averaged -0.42°C. La Niña conditions will likely develop during mid- or late-autumn. The SOI was +13.60 today. The preliminary Arctic Oscillation (AO) was -0.387 today.
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	  Occasional Thoughts on Climate Changedonsutherland1 replied to donsutherland1's topic in Climate Change Unfortunately, that appears to be the de facto strategy. The issue isn't one of technology (the technology already exists and is improving), costs (renewable energy is less expensive than fossil fuels), resources for investment (society has proved capable of mobilizing enormous sums of money at rapid speed), or lack of time (the problem has been known for decades allowing for a very gradual transition), but one of a decided and purposeful lack of urgency. A book published last year (Wiegandt 2024) that sketches out, in part, a world that is 3°C warmer than the pre-industrial world (likely scenario by 2100 on the current path), highlights how human societies mobilize when they perceive that there are real, grave, and urgent problems and when they don't. Unfortunately, the issue of climate change falls into the latter example as far as human society is concerned, even noting the dramatic backward developments in the United States. The book's editor wrote: In such a future world, we will have to deal with a radicalization of weather patterns and with temperatures that will be as much as 6 degrees higher on average over land areas. Such a transformation will have grave effects on global agriculture, massively damage global infrastructure, and significantly impair or even destroy large ecosystems... I would like to recall that governments mobilized trillions of U.S. dollars, overnight, as it were, both in 2008 to deal with the world financial crisis and in 2020 in the wake of the rampant Corona pandemic! We must realize that global warming poses an incomparably greater challenge. Given the editor's observation and lack of action today, once irreversible outcomes are realized e.g., from rising sea level, the greatest tragedy won't be the loss of valuable real estate that is reclaimed by a rising ocean and the social and economic dislocations it causes, bad as they might be. The greatest tragedy will be that the problem was fully avoidable had today's generation of political leaders possessed the courage and foresight to act. They could have prevented the outcome. Instead, they chose to subject future generations, including today's youth, to the growing consequences of a warmer world. A return to the mid-Pliocene almost certainly won't bring about a tropical Paradise on Earth.
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	  Occasional Thoughts on Climate Changedonsutherland1 replied to donsutherland1's topic in Climate Change It was the wettest monsoon season in Phoenix since 2021 and biggest one- and two-day rainfalls since October 2018.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro Highest Percentage of Days with 10" or More Snowfall): 1869-2024: February 4-10: 0.8% of days 1991-2020: January 20-26: 1.4% of days
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro It depends on the timeframe one is using and how one defines snowiest week. Select data for Central Park: Snowiest Week (Based on Mean Daily Snowfall): 1869-2024: February 7-13: 0.4" per day 1991-2020: January 21-27: 0.6" per day Snowiest Week (Based on the Percentage of Days with Measurable Snowfall): 1869-2024: January 27-February 2: 16.1% 1991-2020: January 25-31: 15.7% Snowiest Week (Based on the Percentage of Days with 1" or More Snowfall): 1869-2024: February 1-7: 9.0% 1991-2020: January 21-27: 10.5%
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	First week of October looks very dry. A frontal passage might bring some rain early in the second week of the month, but a lot can still change by that time.
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	  Occasional Thoughts on Climate Changedonsutherland1 replied to donsutherland1's topic in Climate Change September 2025 in Phoenix marked the fourth consecutive year with a monthly mean temperature at or above 90°, a milestone never before observed in Phoenix's historical climate record which goes back to 1895. This persistent late-summer heat is consistent with the broader impacts of climate change, which is driving rising temperatures, more frequent and intense heatwaves, and shifts in seasonal patterns across the Southwest. Although internal variability influences any single month's weather, the sustained nature of recent September heat underscores a long-term warming trend fueled by anthropogenic greenhouse gas emissions. September also saw an hourly rainfall record set on September 26th. During a severe thunderstorm with large hail and gusts of 56 mph, Phoenix received an hourly rainfall amount of 1.09". Even as the Southwest is undergoing aridification, an increasingly intense hydrological cycle driven by ongoing warming can produce intense rainfall amounts.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro Final September mean temperature in New York City: 70.6° September 2025 had the second smallest standard deviation in temperatures for any September. Lowest Standard Deviations: 1. 1968 3.43° 2. 2025 3.63° 3. 1870 3.81° 4. 2024 3.94° 5. 1908 4.08° Standard Deviations in the New York City Area: Bridgeport: 3.60° (old record: 3.72°, 2024) Islip: 4.11° (3rd lowest) New York City-Central Park: 3.63° (2nd lowest) New York City-JFK Airport: 3.64° (2nd lowest) New York City-LaGuardia Airport: 3.82° (2nd lowest) Newark: 4.19° (3rd lowest) White Plains: 4.02° (old record: 4.28°, 1968)
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro I thought I had included the 1895 but typed too fast. The 1914 heatwave tied the 1895 one for the latest on record at Central Park.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro The latest heatwave on record for Central Park is September 21-23, 1895 and 1914. Newark's is September 23-25, 2017.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro September is ending on an unseasonably warm note. Many parts of the region saw high temperatures in the 80s. Preliminary highs included: Bridgeport: 81° Islip: 82° (tied record set in 1986) New York City-Central Park: 81° New York City-JFK Airport: 81° New York City-LaGuardia Airport: 80° Newark: 83° White Plains: 80° The last time all seven locations saw 80° or above highs on September 30th was in 1986. The start of October will coincide with arrival of the coolest air mass so far this season, but temperatures will likely quickly moderate, rising to above normal levels within a few days. High temperatures will reach only the middle 60s tomorrow and Thursday. New York City will see the low temperature bottom out in the lower 50s on Thursday morning. Outside the City, widespread 40s are likely with a few of the colder locations dipping into the 30s. A rapid warmup will commence on Friday and a warm weekend lies ahead. The guidance and historical experience following a second half September mean temperature of 70° or above suggest that October will be warmer than normal in the New York City area. The two most recent Octobers with a cooler than normal first half like 2025 and a second half with a mean temperature of 70° or above were: 2017 (October mean temperature: 64.1° and October 2019: October mean temperature 59.9°). The ENSO Region 1+2 anomaly was -0.1°C and the Region 3.4 anomaly was -0.5°C for the week centered around September 24. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.12°C and the ENSO Region 3.4 anomaly has averaged -0.42°C. La Niña conditions will likely develop during mid- or late-autumn. The SOI was +3.63 today. The preliminary Arctic Oscillation (AO) was -0.436 today.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro Islip has reached 82°. That ties the daily record for September 30th that was set in 1986.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro Newark has reached 80° for the 10th time during the second half of September. That is tied with September 1881 for the second most such days and just one short of the record of 11 days from 2017.
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	The latest runs of the CFSv2 have consistently forecast a drier to much drier than normal October. A dry October that follows a dry September has typically been followed by a drier than normal winter. At Central Park, where records go back to 1869, 69% of cases with drier than normal Septembers and Octobers were followed by drier than normal winters while 31% of such cases were followed by wetter than normal winters. Put another way, drier winters were 2.2 times as likely than wetter ones. When it comes to more extreme winters (precipitation 25% or more below normal or 25% or more above normal), 22.5% of winters were much drier than normal while 8.5% of winters were much wetter than normal. The very dry winters were 2.6 times as likely as the very wet ones. Drier winters had a tendency for less snowfall than the wetter ones. It should be noted that the coefficient of determination between winter precipitation and seasonal snowfall is very low (0.049). When winter mean temperature is added to the mix, the coefficient of determination increases to 0.288. Once the model is expanded to include Fall Precipitation, Fall Mean Temperature, Winter Precipitation, and Winter Mean Temperature, the coefficient of determination rises to 0.352. Put another way, warm and dry autumn coupled with a warm and dry winter favors below normal seasonal snowfall and explains 35% of the seasonal snowfall outcome. In short, other variables e.g., timing of systems, still have much greater influence on the overall seasonal snowfall outcome.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro Above normal temperatures will continue through tomorrow, the remainder of September. The start of October will start with arrival of the coolest air mass so far this season, but temperatures will likely quickly moderate, rising to above normal levels within a few days. The guidance and historical experience following a second half September mean temperature of 70° or above suggest that October will be warmer than normal in the New York City area. The two most recent Octobers with a cooler than normal first half like 2025 and a second half with a mean temperature of 70° or above were: 2017 (October mean temperature: 64.1° and October 2019: October mean temperature 59.9°). Imelda will approach the South Carolina coast but then turn out to sea avoiding U.S. landfall on account of Fujiwhara interaction with the stronger Humberto. The ENSO Region 1+2 anomaly was -0.1°C and the Region 3.4 anomaly was -0.5°C for the week centered around September 24. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.12°C and the ENSO Region 3.4 anomaly has averaged -0.42°C. La Niña conditions will likely develop during mid- or late-autumn. The SOI was -16.99 today. The preliminary Arctic Oscillation (AO) was -0.298 today. Based on sensitivity analysis applied to the latest guidance, there is an implied near 100% probability that New York City will have a warmer than normal September (1991-2020 normal). September will likely finish with a mean temperature near 70.5° (1.3° above normal). Supplemental Information: The projected mean would be 2.5° above the 1981-2010 normal monthly value.
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	  Occasional Thoughts on Climate Changedonsutherland1 replied to donsutherland1's topic in Climate Change The North Atlantic has a deep overturning circulation (AMOC) that pushes surface heat below resulting in a much deeper mixed layer than the North Pacific. The melting of the Greenland ice sheet has also been dumping lighter freshwater into the North Atlantic weakening the AMOC but creating a persistent area of cool SSTAs, often referred to as a 'warming hole." So, even as positive cloud feedbacks and reduction in aerosols have increased incoming solar radiation, these differences mitigate the extent of North Atlantic warming relative to the North Pacific.
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	  Occasional Thoughts on Climate Changedonsutherland1 replied to donsutherland1's topic in Climate Change There's probably a complex series of interrelated factors driving the rapid warming of the North Pacific. Those factors include: Arctic sea ice-/Arctic amplification-forced changes in the circulation leading to more prolonged and deeper ridges and a shift in storm tracks Cloud-related changes/positive cloud feedbacks, e.g., reduction in low-level clouds, driven by rising atmospheric CO2 and resulting warming allowing an increase in incoming solar radiation Reduction in aerosols also allowing an increase in incoming solar radiation The North Pacific also has a shallower mixed layer, which allows for faster heating Having said this, rising anthropogenic greenhouse gas forcing is the main driver. It is increasing oceanic heat content and either driving or exacerbating the above factors. There is also some emerging literature about inter-basin teleconnections where, for example, a warming of the Gulf Stream region influences atmospheric responses, including a weakening of the Aleutian Low.
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	September 16-30, 2025 is on track to finish with 0.47" rainfall for Central Park. Since 1869, there have been 25 cases with 0.50" or less rainfall during the second half of September. Among those cases, 60% went on to have a drier than normal October while 40% went on to have a wetter than normal October. The latest CFSv2 monthly forecast shows a drier to much drier than normal October: The latest ECMWF weeklies also show a drier than normal start to October: CPC's 6-10-day precipitation forecast also favors drier than normal conditions: However, its monthly forecast from September 18th indicates equal chances of above or below normal precipitation. Finally, of the 8 years with mean temperatures of 70° or above during the second half of September coupled with < 1.00" rainfall, 75% were followed by a drier than normal October. The two exceptions were 2005 and 2019. All said, the odds lean toward a drier than normal October, but that isn't cast in stone.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro 79 at JFK.
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	  Occasional Thoughts on Climate Changedonsutherland1 replied to donsutherland1's topic in Climate Change I agree about the corrupting influence of oligarchs. However, the public matters, as the public votes.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro Under bright sunshine and deep blue skies, parts of the region saw near record and record warm temperatures. High temperatures included: Hartford: 85° Islip: 84° (old record: 80°, 2015) New York City-Central Park: 83° New York City-LaGuardia Airport: 85° (old record: 84°, 2014) Newark: 89° (old record: 87°, 2014) White Plains: 85° (old record: 84°, 2014) Tomorrow and Tuesday will be a bit cooler on account of increased cloud cover. Nevertheless, above normal temperatures will continue through the remainder of September. The start of October could see the arrival of the coolest air mass so far this season, but temperatures will likely quickly moderate, rising to above normal levels. The guidance and historical experience following a second half September mean temperature of 70° or above suggest that October will be warmer than normal in the New York City area. The two most recent Octobers with a cooler than normal first half like 2025 and a second half with a mean temperature of 70° or above were: 2017 (October mean temperature: 64.1° and October 2019: October mean temperature 59.9°). Imelda will approach the South Carolina coast but then turn out to sea avoiding U.S. landfall on account of Fujiwhara interaction with the stronger Humberto. Even without landfall, Imelda will bring some periods of heavy rain, gusty winds, and pounding surf to coastal areas. The ENSO Region 1+2 anomaly was 0.0°C and the Region 3.4 anomaly was -0.4°C for the week centered around September 17. For the past six weeks, the ENSO Region 1+2 anomaly has averaged -0.03°C and the ENSO Region 3.4 anomaly has averaged -0.38°C. La Niña conditions will likely develop during mid- or late-autumn. The SOI was -14.62 today. The preliminary Arctic Oscillation (AO) was -0.108 today. Based on sensitivity analysis applied to the latest guidance, there is an implied near 100% probability that New York City will have a warmer than normal September (1991-2020 normal). September will likely finish with a mean temperature near 70.4° (1.2° above normal). Supplemental Information: The projected mean would be 2.4° above the 1981-2010 normal monthly value.
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	  September 2025 OBS-Discussion centered NYC subforumdonsutherland1 replied to wdrag's topic in New York City Metro Newark has now reached 86°. The last time Newark had at least five days with highs of 86° or above during the second half of September was 2019. In addition, Islip has reached 82°. That breaks the daily record of 80° from 2015. Newark has reached 88°, which breaks the daily mark of 87° from 2014.

 
         
                     
                     
                     
					
						 
					
						 
                     
                     
                     
                     
					
						 
                     
                     
                     
                     
                     
                     
                     
                    