dendrite

The bear was punished for being a bear.

Singing his entire winter forecast in soprano.

They're never done. I see mosquitoes every Christmas eve.

Yeah white pines have been nuts this year. I wonder if the late freeze or Feb cold gave them a signal to put out some extra seed cones this year. Maybe it’s just a cyclical thing.

Mitch is 19°…he has to have pack.

25.3° I anxiously await the time change.

27.1° so far

Lots of sand here on the side roads.

First flakes at home now.

42F and sunny. COC in January

Any word from Mitch?

The oaks take forever. Beech will hang on for most of the winter as well.

Look at all of those leaves in the trees still to drop. Looks like a lot of blowing for you in your future.

Stay safe everyone.

I made this yesterday on my work comp, but forgot to post it. You can see how BOS jumps out a consistent 2F higher on the departures in the same time frame where the MADIS chart indicates about a 2F error. Aug '18 to about Feb '20.

33° overcast Hoping for the last flakes of the season today

RIP

Been stuck at 36° for 3 hours.

I always enjoy these step changes. 2F too warm for all of 2019

It's kind of semantics, but it isn't necessarily fair to say a site like BOS is erroneous and reads 2F too high when it could simply be the effects of the heat island compared to the burbs. You don't know if a sensor is truly erroneous unless you're testing it directly with a calibrated comparison or in a chamber.

Not if you read and understand it. The error is comparing the analysis temp to the reported temp. So when the error is positive, the analysis temp is higher than the reported temp…therefore the sensor is reading cooler than expected. It wouldn’t be correct to judge a sensor’s error based on these analyses because it compares the data to stations around it. Microclimates can affect these. A place like BOS, on the coast, will see higher than usual “error” with east flow in the spring and fall because of possible significant differences between the coast and places 10 miles inland. UHIs, elevation differences, geographical differences, siting differences, etc all have an effect. What we look for are significant step changes (jumps) in the error over a short amount of time to indicate something changed with the station’s siting or instrumentation. New stations coming online can affect the analysis generated temps as well, but it doesn’t usually acount for significant shifts in the error.

Negative error means it's running warmer than the analysis temp.

Looks okay for now although it’s a little on the warmer end of the baseline recently so I’d keep an eye on it over the next couple of months.

29.1° will do it. The banana is done for good now.

A little nippy with the breeze. 29.8°