November 2025 OBS Discussion

[SACRUS]

 

Highs:

EWR: 77 (2020)
NYC: 76 (1975)
LGA: 77 (2020)
JFK: 74 (2020)

Lows: 

EWR: 27 (1976)
NYC: 29 (2019)
LGA: 31 (2019)
JFK: 28 (1976)

 

Historical:

 

1870 - The first storm warning was issued by the U.S. Signal Corps Weather Service. (Sandra and TI Richard Sanders - 1987)

 

1870: The U.S. Signal Corps Weather Service issued the first storm warning on this day. Professor Increase A. Lapham believed that warnings of deadly storms on the Great Lakes could be derived from telegraphed weather observations. As a result, a bill was introduced and signed into law to establish a national telegraphic weather service. The Signal Corps began taking observations of November 1st, 1870. On this date, Lapham would issue the first storm warning, a cautionary forecast for the Great Lakes.

 

1879: A tornado struck Crawford County, Arkansas, killing several people.

 

1913: The Great Lakes Storm of November 7-13, 1913, was a blizzard with hurricane-force winds that devastated the Great Lakes Region, sinking as many as 19 ships and stranding 19 others. This storm would be the deadliest and most destructive natural disaster ever to hit the Great Lakes. 

1914: It finally rained on this date in Bagdad, California, breaking an incredible rain-free streak of 767 days, the U.S. record! (Ref. AccWeather Weather History)

1943: 3.20 inches of rain fell in 24 hrs. at WBO in Washington, DC. (Washington Weather Records - KDCA)

1943 - An early season snowstorm raged across eastern South Dakota and Minnesota into northern Wisconsin. The storm produced 22 inches of snow at Fairbult and Marshall MN, 20 inches at Redwood Falls MN, and 10.1 inches at Minneapolis. Drifts fifteen feet high were reported in Cottonwood County MN. The storm produced up to two feet of snow in South Dakota smothering a million Thanksgiving day turkeys. (6th-8th) (David Ludlum) (The Weather Channel)

 

1966 - The temperature in downtown San Francisco reached a November record of 86 degrees. (The Weather Channel)

 

1987 - Thunderstorms over Texas produced locally heavy rains in the Hill Country, with 3.50 inches reported at Lakeway, and 3.72 inches reported at Anderson Mill. Thunderstorms over Louisiana produced hail an inch in diameter at Clay and at Provencial. Blustery northwest winds, ushering cold air into western Kansas and into northwest Texas, gusted to 46 mph at Hill City KS. (Storm Data) (The National Weather Summary)

1988 - Fair weather prevailed across much of the nation for Election Day. Midland TX equalled their record for November with an afternoon high of 89 degrees, and the record high of 87 degrees at Roswell NM was their fifth in eight days. (Storm Data) (The National Weather Summary)

1989 - Afternoon and evening thunderstorms developing along and ahead of a cold front produced severe weather from northern Louisiana into central Georgia. Thunderstorms spawned three tornadoes, and there were sixty-four reports of large hail or damaging winds. A late afternoon thunderstorm in central Georgia spawned a tornado which killed one person and injured eight others at Pineview. Late afternoon thunderstorms in central Mississippi produced baseball size hail around Jackson, and wind gusts to 70 mph Walnut Grove. (The National Weather Summary) (Storm Data)

1991: The first week in November in Iowa was extremely cold. The average temperature over the state for the week was 18.3°, which is 24.7 degrees below normal. This was easily the coldest first week of November in 100 years of record. (Ref. AccWeather Weather History)

1994: The twelfth and final tropical cyclone of the Atlantic hurricane season formed in the southwestern Caribbean. While Hurricane Gordon was only a Category 1, it killed 1,149 individuals, including 1,122 in Haiti.


1999: Kennebec, South Dakota:
The temperature reaches 89 °F, breaking the all time record for the warmest November maximum temperature ever recorded in the state. (Ref. WxDoctor) 85 record high temperatures fell across the Midwest as Indian Summer weather was felt across the region. Many locations set new high temperature records for the month of November, not just for the date, including Valetine NE, where the mercury topped out at 86 degrees. Other records included 82 in Omaha NE and 86 in Huron SD. Pierre SD was the nation's hot spot, with a high of 87 degrees that was a record for November. For the second day in a row, Winner SD set a new November record.
(Ref. AccWeather Weather History)

2006: Denver, CO climbed to 80°. their highest November temperature since records began in 1872 and the highest temperature for so late in the season. Chadron, NE also hit 80°, their latest 80 degree reading for so late in the season. (Ref. Wilson Weather History)

[donsutherland1]

1 minute ago, SACRUS said:

 

Highs:

EWR: 77 (2020)
NYC: 76 (1975)
LGA: 77 (2020)
JFK: 74 (2020)

Lows: 

EWR: 27 (1976)
NYC: 29 (2019)
LGA: 31 (2019)
JFK: 28 (1976)

 

Historical:

 

1870 - The first storm warning was issued by the U.S. Signal Corps Weather Service. (Sandra and TI Richard Sanders - 1987)

 

1870: The U.S. Signal Corps Weather Service issued the first storm warning on this day. Professor Increase A. Lapham believed that warnings of deadly storms on the Great Lakes could be derived from telegraphed weather observations. As a result, a bill was introduced and signed into law to establish a national telegraphic weather service. The Signal Corps began taking observations of November 1st, 1870. On this date, Lapham would issue the first storm warning, a cautionary forecast for the Great Lakes.

 

1879: A tornado struck Crawford County, Arkansas, killing several people.

 

1913: The Great Lakes Storm of November 7-13, 1913, was a blizzard with hurricane-force winds that devastated the Great Lakes Region, sinking as many as 19 ships and stranding 19 others. This storm would be the deadliest and most destructive natural disaster ever to hit the Great Lakes. 

1914: It finally rained on this date in Bagdad, California, breaking an incredible rain-free streak of 767 days, the U.S. record! (Ref. AccWeather Weather History)

1943: 3.20 inches of rain fell in 24 hrs. at WBO in Washington, DC. (Washington Weather Records - KDCA)

1943 - An early season snowstorm raged across eastern South Dakota and Minnesota into northern Wisconsin. The storm produced 22 inches of snow at Fairbult and Marshall MN, 20 inches at Redwood Falls MN, and 10.1 inches at Minneapolis. Drifts fifteen feet high were reported in Cottonwood County MN. The storm produced up to two feet of snow in South Dakota smothering a million Thanksgiving day turkeys. (6th-8th) (David Ludlum) (The Weather Channel)

1953 - Residents of New York City suffered through ten days of smog resulting in 200 deaths. (The Weather Channel)

1966 - The temperature in downtown San Francisco reached a November record of 86 degrees. (The Weather Channel)

 

1987 - Thunderstorms over Texas produced locally heavy rains in the Hill Country, with 3.50 inches reported at Lakeway, and 3.72 inches reported at Anderson Mill. Thunderstorms over Louisiana produced hail an inch in diameter at Clay and at Provencial. Blustery northwest winds, ushering cold air into western Kansas and into northwest Texas, gusted to 46 mph at Hill City KS. (Storm Data) (The National Weather Summary)

1988 - Fair weather prevailed across much of the nation for Election Day. Midland TX equalled their record for November with an afternoon high of 89 degrees, and the record high of 87 degrees at Roswell NM was their fifth in eight days. (Storm Data) (The National Weather Summary)

1989 - Afternoon and evening thunderstorms developing along and ahead of a cold front produced severe weather from northern Louisiana into central Georgia. Thunderstorms spawned three tornadoes, and there were sixty-four reports of large hail or damaging winds. A late afternoon thunderstorm in central Georgia spawned a tornado which killed one person and injured eight others at Pineview. Late afternoon thunderstorms in central Mississippi produced baseball size hail around Jackson, and wind gusts to 70 mph Walnut Grove. (The National Weather Summary) (Storm Data)

1991: The first week in November in Iowa was extremely cold. The average temperature over the state for the week was 18.3°, which is 24.7 degrees below normal. This was easily the coldest first week of November in 100 years of record. (Ref. AccWeather Weather History)

1994: The twelfth and final tropical cyclone of the Atlantic hurricane season formed in the southwestern Caribbean. While Hurricane Gordon was only a Category 1, it killed 1,149 individuals, including 1,122 in Haiti.


1999: Kennebec, South Dakota:
The temperature reaches 89 °F, breaking the all time record for the warmest November maximum temperature ever recorded in the state. (Ref. WxDoctor) 85 record high temperatures fell across the Midwest as Indian Summer weather was felt across the region. Many locations set new high temperature records for the month of November, not just for the date, including Valetine NE, where the mercury topped out at 86 degrees. Other records included 82 in Omaha NE and 86 in Huron SD. Pierre SD was the nation's hot spot, with a high of 87 degrees that was a record for November. For the second day in a row, Winner SD set a new November record.
(Ref. AccWeather Weather History)

2006: Denver, CO climbed to 80°. their highest November temperature since records began in 1872 and the highest temperature for so late in the season. Chadron, NE also hit 80°, their latest 80 degree reading for so late in the season. (Ref. Wilson Weather History)

A quick note: Denver finally surpassed its monthly record that was set in 2006 this year. On November 2, the mercury topped out at 83° in Denver.

[SACRUS]

 

 

Chill pushing into the upper midwest

 

[SACRUS]

 

Through the first week of Nov

 

Dep (rain)

EWR: +1.8 (0.09)
NYC: +1.1 (0.21)
LGA: +0.9 (0.11) 
JFK: + 0.7 (0.01)

[SACRUS]

This was Nov 18 - 23

1953 - Residents of New York City suffered through ten days of smog resulting in 200 deaths. (The Weather Channel)

In November 1953, a stagnant air mass settled over New York City from roughly November 18 to 23, trapping pollutants close to the ground and creating a dense smog that blanketed the city for nearly a week. Heavy use of coal-fired heating, industrial furnaces, incinerators, and vehicle exhaust filled the air with sulfur dioxide and soot that could not disperse due to the atmospheric inversion. As a result, air-pollution levels surged to dangerous concentrations, leading to a sharp increase in respiratory and cardiac illnesses. Health officials later estimated that between 170 and 260 excess deaths occurred during the event. The disaster became a turning point in U.S. urban air-quality awareness, helping to spur stronger local and national pollution-control measures in the years that followed.

[MJO812]

57 here 

[donsutherland1]

45 minutes ago, SACRUS said:

 

 

Chill pushing into the upper midwest

 

Many record lows will fall, especially in the South.

[ForestHillWx]

Beautiful right now; great day for yard work and cleaning out the chicken coop before the winter months. Enjoy all!

[Sundog]

6z RGEM has solid freeze for the city Tuesday morning:

[jm1220]

24 minutes ago, Sundog said:

6z RGEM has solid freeze for the city Tuesday morning:

If the winds calm down, east of the city on the N Shore especially could see low to mid 20s and teens for Pine Barrens. Definitely a killing freeze for anything outside. 

[Sundog]

1 minute ago, jm1220 said:

If the winds calm down, east of the city on the N Shore especially could see low to mid 20s and teens for Pine Barrens. Definitely a killing freeze for anything outside. 

Looks like CAA with NW winds, I'm not sure if the winds will die for radiational cooling out there. 

The CAA is one of the reasons the city actually gets below freezing. 

But sometimes isolated spots have their winds die down anyway. 

[steve392]

29 minutes ago, Sundog said:

6z RGEM has solid freeze for the city Tuesday morning:

Beautiful!!  Perfect sleeping weather with windows open.

[MJO812]

I have my AC on in my car. Mild outside

[nycwinter]

very lovely day it is went out for my walk.. in a hoodie and not wearing a coat for a change..

[winterwx21]

Vegetable garden finally got finished off early Friday morning with the low temp getting down to 28 here. 

[psv88]

64 and beautiful 

[FPizz]

2 hours ago, Sundog said:

6z RGEM has solid freeze for the city Tuesday morning:

That should take off the rest of the leaves that are left on trees here.  They are like 85% empty as of now.

[psv88]

Probably at 50% leaves here now. Some of the more sensitive plants were killed by the freeze this week, but the hardier plants are fine.

[SACRUS]

 

66 / 47 and another gorgeous fall day - on weekend.

 

 

[FPizz]

@Sundog  this is what the extra tile on the dashboard looks like.  Where i have it mounted temp is 62.8, roof sensor where the station is mounted is 64.8

[MJO812]

65 here

[donsutherland1]

On 11/3/2025 at 6:52 AM, donsutherland1 said:

Aside from the 11/2 12z run of the GFS, the GFS is not showing an early season snowstorm in the New York City area. Outlier events typically do not verify when they lack support. So far, there is very little support on either the EPS or GEFS for the kind of snowstorm one run of the GFS showed yesterday. In general, one should wait for support to develop and run-to-run continuity to develop before embracing outlier events. The probability of the kind of event for New York City and its immediate suburbs shown yesterday remains low. More likely is a cold rain event with highs in the 40s with perhaps some flakes mixed in, though the mixing remains uncertain at this time. A better chance of snow exists for parts of the Poconos, Catskills, Adirondacks, and central/northern New England, which would include parts of Dutchess and Orange Counties.

Revisiting the above post now that some time has passed. The general idea about being cautious about outlier model runs that lack support holds.

Today's 12z run of the GFS:

The National Blend of Models shows NYC's temperatures falling through the 50s during the showers/rain. That's somewhat warmer than previously shown on the guidance, but 40s remains a possibility. The outlier notion of an accumulating snowstorm is not plausible.

[Sundog]

1 hour ago, FPizz said:

@Sundog  this is what the extra tile on the dashboard looks like.  Where i have it mounted temp is 62.8, roof sensor where the station is mounted is 64.8

Awesome thanks!

My station is about 18 feet off the ground, or 6 feet above my balcony since I mounted it on the railing. 

I bet my temps would be a little cooler if I had it closer to the ground. 

[psv88]

31 minutes ago, Sundog said:

Awesome thanks!

My station is about 18 feet off the ground, or 6 feet above my balcony since I mounted it on the railing. 

I bet my temps would be a little cooler if I had it closer to the ground. 

That’s the worst possible height. You don’t get accurate wind or temperature measurements 

[Sundog]

1 hour ago, psv88 said:

That’s the worst possible height. You don’t get accurate wind or temperature measurements 

Fake suburban life, sucks for me

[Sundog]

Ideally I'd have an open area 2 meters off the ground for temps and a pole above the roof at 10 meters but either can't be done. 

Would temps be affected if I put the thermometer literally next to one of those white solid  plastic fences? Would the plastic fence affect readings?

[psv88]

26 minutes ago, Sundog said:

Ideally I'd have an open area 2 meters off the ground for temps and a pole above the roof at 10 meters but either can't be done. 

Would temps be affected if I put the thermometer literally next to one of those white solid  plastic fences? Would the plastic fence affect readings?

No it wouldn’t. You’ll never get an accurate wind reading anyway. Just put the station 6 feet above a patch of grass

[Brian5671]

upton has rain from 1pm on tomorrow but models don't have much