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September weather discussion


Ginx snewx

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Gusting 12-15 here..Not calm..ever

 

It was dead calm here barring slight movement of air but my anemometer only had some 2mph wind about 0300, that was it all night.

 

Got down to 34F here but no sign of frost in the neighborhood.

 

Different story down here.  It was 37° at my house but it's always a few degrees cooler down the hill from me and it was frosty across all three towns that I drive through in northern CT.  No advisory though. 

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000

FXUS61 KBOX 240541

AFDBOX

AREA FORECAST DISCUSSION

NATIONAL WEATHER SERVICE TAUNTON MA

141 AM EDT TUE SEP 24 2013

 

...

.NEAR TERM /UNTIL 6 AM THIS MORNING/...

130 AM UPDATE...

 

...

CLOUD COVER HAS KEPT TEMPS UP ACROSS W ZONES WHERE FROST

ADVISORIES ARE IN EFFECT. SKIES ARE CLEARING BUT TEMPS STILL IN

40S...AND WITH HIGHER DEWPOINTS TEMPS WILL NOT GET AS COLD AS

PREVIOUSLY FORECAST SO EXPECT ANY FROST TO BE ISOLATED. WILL

LIKELY CANCEL THE ADVISORY FOR ALL OR PART OF THE AREA WITH NEXT

UPDATE.

 

 

Not true in my neck of the woods.  Plenty of frost along my entire drive from Stafford through Enfield...not isolated.  Just about every open field/rooftop had frost.

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It was dead calm here barring slight movement of air but my anemometer only had some 2mph wind about 0300, that was it all night.

Different story down here. It was 37° at my house but it's always a few degrees cooler down the hill from me and it was frosty across all three towns that I drive through in northern CT. No advisory though.

I was shocked that no frost here at 34F. Yet you saw widespread at 37F. What are the conditions necessary for frost?

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Yeah you guys are right. Just checked on bluehill.org and their Davis instrument is reporting 43F. Stupid ASOS.

 

Sorry, I was on the road and didn't mean to be terse. Yeah like Will said, those CAA days will always cause MQE to be at least colder than BOS and a few warmer than ORH. When BOS was colder than MQE...red flag to me. 

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Not true in my neck of the woods.  Plenty of frost along my entire drive from Stafford through Enfield...not isolated.  Just about every open field/rooftop had frost.

There must be something that's making them cancel frost advisories and not issuing them for other areas. Perhaps the threshold for frost advisories isn't being met. Maybe it has to be below 36 for at least six hours across at least half of the forecast zone to consider it a damaging frost that warrants an advisory. We're not out of the normal growing season yet, so that's not the reason for lack of issuance.

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I was shocked that no frost here at 34F. Yet you saw widespread at 37F. What are the conditions necessary for frost?

 

I think it was closer to 34° along my route.  It's usually 2-3° colder down the hill.  Frost forms at those temperatures because the surface (not where the thermometer is) reaches 32° but there are other processes that occur when the dewpoint gets below 32° but the air temp is above that.

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Sorry, I was on the road and didn't mean to be terse. Yeah like Will said, those CAA days will always cause MQE to be at least colder than BOS and a few warmer than ORH. When BOS was colder than MQE...red flag to me. 

Makes sense. I just saw the temps and automatically assumed one. On clear, calm mornings I am used to seeing that localized inversion, but I just checked the winds and OWD is 7 kts and MQE is 9 kts so that explains why there wouldn't be one.

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There must be something that's making them cancel frost advisories and not issuing them for other areas. Perhaps the threshold for frost advisories isn't being met. Maybe it has to be below 36 for at least six hours across at least half of the forecast zone to consider it a damaging frost that warrants an advisory. We're not out of the normal growing season yet, so that's not the reason for lack of issuance.

 

I don't know but I see it every year up here where an advisory will be issued for most of Mass. but not for NE CT.  ALB will issue one for NW CT but you can see from this morning's map that temps were pretty much the same between the corners.  Like you said, there might be different criteria between the offices and when they saw that not being met in Mass. they dropped the advisories there.  We never had one.

 

BTW, some nice inland 37's for you down there.  That matches my low up here.

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BTW, some nice inland 37's for you down there.  That matches my low up here.

Yeah you can see the nice gradient that sets up south of the parkway. It's almost ten degrees warmer on the water where I am compared to places that are just 5-10 miles inland. Those interior backcountry areas do OK with respect to radiating and snowfall too since there is a little bit of elevation around the notch of the panhandle on both sides of the border.

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Mount Washington wind chill this morning hovering around 0F. And I thought yesterday's Mansfield chill in the teens was a shock to the system, near zero would be a whole other level of September cold.

The cold on washington is another climate of cold in comparison. They were 25.6 around 2pm yesterday w sustained winds of 60mph!!!

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WOW..now this is about as impressive a stat as we've seen .. I'm beginning to believe

 

 

NWS New York NY ‏@NWSNewYorkNY42m

The 47 degrees in #NYC this am was the coldest September low in 13 years! Last time at or below 47 was in 2000. http://ow.ly/i/3eJlU  #nywx

 

 

Are you serious?

 

Coldest low in 13 years on a single date isn't that impressive. If you want impressive, the BOS low on 9/17 was impressive...it broke the record low for the date and was the coldest temp that early in the season in 29 years.

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Are you serious?

 

Coldest low in 13 years on a single date isn't that impressive. If you want impressive, the BOS low on 9/17 was impressive...it broke the record low for the date and was the coldest temp that early in the season in 29 years.

I think it was coldest September low in 13 years, not just for that date. But I agree, nowhere near earth shattering lol.

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