Thursday, March 5, 2009

The situation at 11 PM shows that winds have become calm over much of New England, with clears skies dominating the region as the high pressure system begins to dominate. Light winds and clear skies result in rapid temperature falls throughout the region. Where there is a weak wind, it tends to be westerly.

The time series below is for the last 24 hours at Littleton-Whitefield airport (click here for current conditions). Note that after 7 PM, with calm, clear conditions, that the temperature plummets by 26 degrees 15 F to -11 F as outgoing longwave radiation travels into outer space.


Time
EST (UTC)
Temperature
F (C)
Dew Point
F (C)
Pressure
Inches (hPa)
Wind
MPH
Weather
Latest Midnight (5) Mar 05 -6.0 (-21.1) -11.0 (-23.9) 30.26 (1024) Calm

11 PM (4) Mar 04 -2.9 (-19.4) -9.0 (-22.8) 30.24 (1024) Calm

10 PM (3) Mar 04 -0.9 (-18.3) -6.0 (-21.1) 30.23 (1023) Calm

9 PM (2) Mar 04 1.9 (-16.7) -2.9 (-19.4) 30.22 (1023) Calm

8 PM (1) Mar 04 8.1 (-13.3) 1.0 (-17.2) 30.22 (1023) Calm

7 PM (0) Mar 04 15.1 (-9.4) 3.0 (-16.1) 30.2 (1022) W 7

6 PM (23) Mar 04 18.0 (-7.8) 5.0 (-15.0) 30.18 (1022) NW 10

5 PM (22) Mar 04 19.9 (-6.7) 3.9 (-15.6) 30.15 (1020) WNW 15

4 PM (21) Mar 04 19.9 (-6.7) 3.9 (-15.6) 30.14 (1020) W 16

3 PM (20) Mar 04 21.0 (-6.1) 3.9 (-15.6) 30.13 (1020) WNW 16

2 PM (19) Mar 04 19.9 (-6.7) 3.9 (-15.6) 30.14 (1020) WNW 16

1 PM (18) Mar 04 19.0 (-7.2) 5.0 (-15.0) 30.15 (1020) W 10

Noon (17) Mar 04 18.0 (-7.8) 3.0 (-16.1) 30.17 (1021) W 12

11 AM (16) Mar 04 16.0 (-8.9) 1.0 (-17.2) 30.19 (1022) W 8

10 AM (15) Mar 04 12.9 (-10.6) -0.9 (-18.3) 30.21 (1023) WNW 5

9 AM (14) Mar 04 3.9 (-15.6) -0.9 (-18.3) 30.22 (1023) Calm

8 AM (13) Mar 04 -9.9 (-23.3) -11.9 (-24.4) 30.23 (1023) Calm

7 AM (12) Mar 04 -17.0 (-27.2) -23.1 (-30.6) 30.23 (1023) Calm

6 AM (11) Mar 04 -18.0 (-27.8) -23.1 (-30.6) 30.21 (1023) Calm

5 AM (10) Mar 04 -17.0 (-27.2) -22.0 (-30.0) 30.2 (1022) Calm

4 AM (9) Mar 04 -15.0 (-26.1) -22.0 (-30.0) 30.18 (1022) Calm

3 AM (8) Mar 04 -14.1 (-25.6) -20.9 (-29.4) 30.18 (1022) Calm

2 AM (7) Mar 04 -14.1 (-25.6) -18.9 (-28.3) 30.19 (1022) Calm
Oldest 1 AM (6) Mar 04 -11.9 (-24.4) -18.0 (-27.8) 30.19 (1022) Calm

Time
EST (UTC)
Temperature
F(C)
Dew Point
F(C)
Pressure
Inches(hPa)
Wind
(MPH)
Weather

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