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    Jesse Ferrell

    Central PA Microclimate Strikes Again!

    By Jesse Ferrell, Meteorologist/Community Director
    11/16/2013, 3:38:23 PM

    UPDATE 11/16: I tested my station last night with a thermometer probe inserted into the shelter of the thermometer. Although I was (by far) the lowest minimum in the area this morning, I've confirmed the reading.


    590x652_11170136_station590


    ORIGINAL POST 11/15: Last night, calm winds led to a large temperature fall behind my house here in State College, Pa., and by 10:30 p.m., I was 19 F while surrounding stations were 34 (AccuWeather HQ) and 38 (KUNV airport - see map). That turned out to be my overnight low, while nearby stations barely dropped below freezing all night (map).


    452x714_11151948_centretemps1115a


    My reading was questioned on Twitter, but thermometers rarely read too low (usually too high) and mine is located in a field (NOT retention pond) that cool air drains into quickly when the wind stops. It's not unusual for me to run 5-7 degrees colder than AccuWeather HQ, a station which is about 50 feet higher in elevation than mine.


    590x550_11152000_station1115a

    I wrote back to Matt and he confirmed that there was a lot of local variability last night:

    So far today, I've topped out at 59 F which makes a night-to-day (diurnal) change of 40 degrees, unusual for this area, but this is the time of year to get them. On Nov. 13, 2010, I recorded a 48-degree diurnal change at my station, which is probably a record for my station. The low that day was 16 but the temperature spiked to 64 in the afternoon!

    Here's a map of where the station is -- elevation falls through the yard and into the middle of the field. You can actually see the Davis weather station on my weather cam #5.


    590x234_11152004_station1115b

    The views expressed are those of the author and not necessarily those of AccuWeather, Inc. or AccuWeather.com

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    Jesse Ferrell