Jump to content
  • Member Statistics

    17,606
    Total Members
    7,904
    Most Online
    ArlyDude
    Newest Member
    ArlyDude
    Joined

September 2013 General Discussion


daddylonglegs

Recommended Posts

  • Replies 1k
  • Created
  • Last Reply

I had the AC on last night...   It was 80F in here during the evening and I said enough of that.  The dew points crashed over night here big time...not sure what the deal is there because winds were southerly the whole time.  Ragweed must be thick this morning, yesterday I hardly had a sneeze.  dry dry dry...today should be hot.

 

shorttermpcpn.png

 

That about says it all.

Link to comment
Share on other sites

Lake breeze showed up like I thought. Every day in my forecast has cooled by as much as 5°. No 90s now.

 

Temperatures sound nice up there by you, Bo!

Won't be long before the first 32° lows start up. Maybe the week of the 15th.

Link to comment
Share on other sites

Even though we've been in a warm, dry period overall, it sure has been a rollercoaster since the recent heat has moved into the Plains.  Seems two or three days of heat move in, then a cold front turns us comfortable for a couple days.  Here's the point for the next 7 days here: 87, 73, 83, 89, 82, 76, 69.  Quite the variety.

Link to comment
Share on other sites

All surrounding stations were in the mid to upper 40s, except the official station (DTW) manages to come in about 5 degrees warmer at 52!

 

And that goes into the books.

DTW's low was actually 51F, not 52F....but your point is extremely valid. UHI is worse on some nights more than others, and for whatever reason last night was one of those head-scratching wtf lows. It was clear and calm, excellent radiating conditions. When I woke up I checked the Wyandotte Wunderground station, and saw the low was 47.9F so my first thought was "this will be DTW's first official 40s since early June". I use Wyandotte as a base because we are often close to DTW and being right on the water makes for milder nights, which equals a decent match to DTW and its uhi (ie, Wyandotte will never radiate as well as other suburbs because of the water). But even DET was 48F last night, yet DTW only gets to 51F. A Wunderground station listed as "Romulus, Near I94/275" which is basically right outside the airport property...bottomed out at 47.1F. In the 1970s, Detroits climate narrative stated "minimum readings at Metropolitan Airport. in a semi-rural area, average 2.3F lower than those at City Airport, in a typical residential area, and 4.1F lower than those in downtown Detroit. On humid summer nights or very cold winter nights the difference can exceed 10F". I have also checked numerous cold mornings from the 1970s vs now, using the same stations, and its universal how back then DTW was THE cold spot of SE MI and now its THE mild spot. I mean, it is what it is...but its incredibly irritating to have people who pore over temperature records and say this decade is 0.5F wamer than that decade or whatever when something like this is as clear as the nose on your face. This EXACT morning in 1973 will have a low in the record books of probably 40-41F...this morning it gets 51F, so by default Detroits records have a cold skew in the 1960s-70s and a warm skew now (for example, say a random month ranked state-wide as 40th coldest in 1976 but a Detroit it ranked 21st coldest...and a random month in 2009 ranked 20th coldest state-wide but just 35th coldest at Detroit).

Link to comment
Share on other sites

Lake breeze showed up like I thought. Every day in my forecast has cooled by as much as 5°. No 90s now.

 

Temperatures sound nice up there by you, Bo!

Won't be long before the first 32° lows start up. Maybe the week of the 15th.

looking forward to this:

APX

.LONG TERM...(MONDAY THROUGH FRIDAY)

ISSUED AT 407 PM EDT FRI SEP 6 2013

HIGH PRESSURE MOVING INTO NEW ENGLAND MONDAY SETS UP A WARM

ADVECTION PATTERN BACK ACROSS THE UPPER MIDWEST/GREAT LAKES

REGION...RESULTANT ISENTROPIC ASCENT WILL BRING SHOWERS BACK INTO

THE FORECAST. A COUPLE OF FRONTAL PASSAGES AND ARRIVAL OF REMNANTS

OF PACIFIC NORTHWEST WAVE WILL MAINTAIN SHOWER/THUNDERSTORM

CHANCES FOR TUESDAY/WEDNESDAY. SHARP COOL DOWN APPEARS TO BE IN

THE OFFING TO ROUND OUT THE WORK WEEK.

Link to comment
Share on other sites

DTW's low was actually 51F, not 52F....but your point is extremely valid. UHI is worse on some nights more than others, and for whatever reason last night was one of those head-scratching wtf lows. It was clear and calm, excellent radiating conditions. When I woke up I checked the Wyandotte Wunderground station, and saw the low was 47.9F so my first thought was "this will be DTW's first official 40s since early June". I use Wyandotte as a base because we are often close to DTW and being right on the water makes for milder nights, which equals a decent match to DTW and its uhi (ie, Wyandotte will never radiate as well as other suburbs because of the water). But even DET was 48F last night, yet DTW only gets to 51F. A Wunderground station listed as "Romulus, Near I94/275" which is basically right outside the airport property...bottomed out at 47.1F. In the 1970s, Detroits climate narrative stated "minimum readings at Metropolitan Airport. in a semi-rural area, average 2.3F lower than those at City Airport, in a typical residential area, and 4.1F lower than those in downtown Detroit. On humid summer nights or very cold winter nights the difference can exceed 10F". I have also checked numerous cold mornings from the 1970s vs now, using the same stations, and its universal how back then DTW was THE cold spot of SE MI and now its THE mild spot. I mean, it is what it is...but its incredibly irritating to have people who pore over temperature records and say this decade is 0.5F wamer than that decade or whatever when something like this is as clear as the nose on your face. This EXACT morning in 1973 will have a low in the record books of probably 40-41F...this morning it gets 51F, so by default Detroits records have a cold skew in the 1960s-70s and a warm skew now (for example, say a random month ranked state-wide as 40th coldest in 1976 but a Detroit it ranked 21st coldest...and a random month in 2009 ranked 20th coldest state-wide but just 35th coldest at Detroit).

 

15 years ago, we were pretty much forced to use airports for official records... Now, we can use PWSs and just grab a big enough sample to get an average. Most of metro Detroit is 2-5 degrees colder at night than DTW. Rest assured, the trend will show an upward direction for those to point to for AGW purposes.

 

Probably depends on the wind direction, the direction that forces the air to flow over more runways will probably yield the worst radiational cooling figures. Even calm nights have a slight flow, its rarely ever completely still.

 

I would be interested in knowing where exactly the ASOS is placed at the airport.

Link to comment
Share on other sites

5 days of highs in the 60's in July with 3 of them coming within the last 4 days of July :wub:   Gonna take us until deep sept. to accomplish that  :(   I'm itching for that first fall day with high in the mid 50's and the smell of wood burning in the air.

 

Same here!  :thumbsup:

 

Can't wait for the first frost to abolish the ragweed for the season.

Link to comment
Share on other sites

WSI RPM showing t-storms tomorrow afternoon over NE IL, NW IN.

 

1001121_10151819061216760_654976988_n.pn

 

A full 20° warmer now then it was 24 hours ago.

 

That would piss off some peeps around here, seeing northeast IL getting rain again while areas west continue to bake.  I don't mind the drought so much, but could definitely use a good storm to be sure.

 

Looks like low 90s around here tomorrow, despite the 4km NAM showing 100 lol.

Link to comment
Share on other sites

That would piss off some peeps around here, seeing northeast IL getting rain again while areas west continue to bake.  I don't mind the drought so much, but could definitely use a good storm to be sure.

 

Looks like low 90s around here tomorrow, despite the 4km NAM showing 100 lol.

 

Like you mentioned the thunderstorm activity has favored areas east of I-39 lately.

 

NAM HIRES pretty much shows that was well. - although it does throw you a few showers.

 

ptot33.gif

Link to comment
Share on other sites

gentle garden type thunder showers this morning. have had .3" with another .1-.2 likely before ending. enough to hold at bay the abnormally dry condition just east of here and keep the immediate coast here in the all clear for another week.

even with warm temps, the feel of Summer has faded and Autumn is slowly settling in.... one of my favorite times of the year.

Link to comment
Share on other sites

The weather's been so boring lately, I'm surprised that a separate thread hasn't been spun off for today's "See Text" severe potential across the heart of the subforum. lol

 

Meanwhile, looking forward to sunny and 84° here today.

September is notoriously boring, this weather is par for the course.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

  • Recently Browsing   0 members

    • No registered users viewing this page.

×
×
  • Create New...