Fall 2013 Thread — Northern Hemisphere (beach, climate, snowfall, warm)

[Mac15]

528 dam line will be touching northern ireland on the 17th of September.

First snow on hills maybe? We will have to see what the max temps are.

I would think we would need about 510dam for snow in September LOL.

[theunbrainwashed]

Originally Posted by Cambium

How about what the NAM12z is showing for Wednesday's max temp between 11am and 2pm.

Great, lovely. Just when I thought July was over . That map says I'm gonna be 93 degrees, NWS says I'm gonna have 90 for a high.

[cloudcrash619]

Yeah, just had the hottest temperature of the year today. Memphis made it to 98, 4 degrees above the forecasted high.

[nei]

Low in the upper 30s (just barely, 39°F) forecast again. Feels dry, sky is super clear.

[Cambium]

Frost advisory again tonight for some areas. Next week this map could be fuller.

[Cambium]

Wind Chill of 7°F(-13C) on Mt Washington. Check out the wind gusts! http://www.mountwashington.org/weather/

[theunbrainwashed]

Originally Posted by Cambium

Wind Chill of 7°F(-13C) on Mt Washington. Check out the wind gusts! http://www.mountwashington.org/weather/

Hey Cambium, forgive me if you posted it already, but what is causing the big chill in the Northeast and the subsequent mid-week roastfest from Harrisburg to Portland? NWS is forecasting 90°F for my area

[Cambium]

NWS Boston which covers northern CT, MA, and southern NH

" WEDNESDAY/WEDNESDAY NIGHT...WED WILL REMIND US THAT IT IS STILL SUMMER. WITH +19C 850 TEMPS...A GOOD DEAL OF SUNSHINE...AND SOUTHWEST FLOW CONTINUING...EXPECT HIGH TEMPERATURES TO REACH 85 TO 90 ACROSS THE INTERIOR. COOLER AT THE IMMEDIATE COAST AND 75 TO 80 ON THE ISLANDS. WARM 700 MB TEMPS REMAIN AND THUS AM NOT EXPECTING WIDESPREAD CONVECTION"

[chicagogeorge]

[Cambium]

Originally Posted by theunbrainwashed

Hey Cambium, forgive me if you posted it already, but what is causing the big chill in the Northeast and the subsequent mid-week roastfest from Harrisburg to Portland? NWS is forecasting 90°F for my area

The swings are WILD!

NAM18z had done it again for Wednesday. This would be insane. 97°F NYC metro?




GFS isn't as warm but check out the latest data for Poughkeepsie, NY. The actual highs and lows would be a bit higher and lower than whats shown here.



As far as why, Its the Canadien Highs/ cold fronts / northwest flow VS the Jet stream pulling back north creating a return south flow pushing the warm air up from south. Mid levels warming up as well.