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June 2021


Stormlover74
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17 hours ago, mjr said:

A south wind at JFK comes directly off the cool ocean (about 1500 miles of it). At Newark,  even a south wind with no westerly component, travels over about 50 miles of land. Places like LGA and NYC are far enough away from the ocean so that they can experience significant daytime heating even if an afternoon sea breeze eventually cuts it off.  During the spring there can be times when the temperature difference between Newark and JFK can be 20 degrees or more. La Guardia underperforms if the wind direction is from the NE or ENE coming off Long Island Sound. Central Park underperforms if the trees have leaves on them.

Interestingly,  the Boston airport station is also directly on the ocean but  there the ocean is to the east. Thus, a south or southwest wind at Boston will allow for hot temperatures and a west wind even hotter because of a downslope effect. However, a wind from the north through the east (or, alternatively, a light pressure gradient allowing for an afternoon sea breeze) will result in unpleasantly chilly temperatures.

 

Geography is destiny. 

Thank you! That is very educational.

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14 minutes ago, nycwinter said:

you get  a lot more breaks from the heat then those who live in nyc west and north why complain?

Because I just spent two hours in this heat trying to set up this tent I bought for my weekend camping trip with my wife and kids. Almost lit the thing on fire 

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This is turning out to be a new benchmark for early season heat in Minnesota.


https://www.dnr.state.mn.us/climate/journal/june-2021-heat-wave.html

Minnesota has had many historical heat waves that were "worse" than this one on numerous counts. However, at many locations, this was the longest and most severe heat wave to occur so early in the season. It's not unusual have have several days or more of 90-degree weather during the middle of July, but it is unusual to do so during (or before) the first half of June.

In the Twin Cities, where the heat-retaining urban and suburban infrastructure helped elevate temperatures even further, this heat wave has tied the record for consecutive high temperatures of at least 90 F on or before June 15, and obliterated the record for similar early-season consecutive low temperatures of at least 70 F--both officially at six straight days through June 8th. The low temperatures in particular have been incredibly high in the Twin Cities, and so even though other historical heat waves produced higher daily maximum temperatures, not have come anywhere near this one in terms of daily average temperatures.

Records of note set during June 2021 heat wave:

  • Duluth, June 4-5: earliest-in-season occurrence of two consecutive high temperatures above 90 F
  • International Falls, June 4: highest temperature on record so early in the season (98 F)
  • Twin Cities, June 5: highest minimum temperature on record so early in the season (78 F)
  • Twin Cities : most consecutive low temperatures at or above 70 F so early in the season (six, ongoing)

Below is a table of daily highs and lows at Minnesota's five major climate stations, from June 3 through June 11, 2021.

Daily maximum and minimum temperatures at Minnesota's five major climate stations, from June 3 through June 10, 2021. Bold indicates a new record high value set in 2021.

Station

 

Thu 6/3

Max / Min

(deg. F)

Fri 6/4

Max / Min

(deg. F)

Sat 6/5

Max / Min

(deg. F)

Sun 6/6

Max / Min

(deg. F)

Mon 6/7

Max / Min

(deg. F)

Tue 6/8

Max / Min

(deg. F)

Wed 6/9

Max / Min

(deg. F)

Thu 6/10

Max / Min

(deg. F)

Duluth 83 / 58 94 / 56 94 / 59 87 / 57 86 / 67 85 / 63    
International Falls 83 / 52  98 / 48 92 / 58 91 / 52 87 / 47 83 / 60    
Rochester 88 / 58 93 / 67 95 / 69 89 / 68 91 / 68 91 / 68    
St. Cloud 89 / 62 97 / 58 98 / 70 92 / 74 91 / 67 96 / 65    
Twin Cities 91 / 70 97 / 73   99 / 78  93 / 76 96 / 74 96 / 77    

 

Update June 9, 2021

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Seems like you folks in the metro area are having a quiet evening convection wise.  Not here.  Cells have been back building over my community for the past hour.  Lots of CTG with this activity.  Also had a wind gust to 33 mph with one of the down bursts.  Looks to be winding down now.  0.77” in the rain guage.

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1 hour ago, Tatamy said:

Seems like you folks in the metro area are having a quiet evening convection wise.  Not here.  Cells have been back building over my community for the past hour.  Lots of CTG with this activity.  Also had a wind gust to 33 mph with one of the down bursts.  Looks to be winding down now.  0.77” in the rain guava.

latest HRRR and NAM have more widely scattered convection developing across the metro in the next 1-3 hours from the convection to the north. See what happens. Also have an outflow boundary in the area from the storms to our south so I definitely agree that the metro will see some action in the next few hours (Nyc west) 

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14 minutes ago, SRRTA22 said:

latest HRRR and NAM have more widely scattered convection developing across the metro in the next 1-3 hours from the convection to the north. See what happens. Also have an outflow boundary in the area from the storms to our south so I definitely agree that the metro will see some action in the next few hours (Nyc west) 

Outflow boundaries on a local scale have been the major player in this evening’s activity out here.

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1 hour ago, nycwinter said:

you get  a lot more breaks from the heat then those who live in nyc west and north why complain?

The temps are higher in NJ and inland areas than out here oftentimes but later in the summer the humidity can more than make up for it with how warm the ocean’s been the last few summers. It’s been to the point where in August when the water gets near 80 the seabreeze makes it feel worse not better when it kicks the humidity up. 

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