Monday, February 17, 2014

| February 17, 2014 | Reply

BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, FEBRUARY 17, 2014 PRESIDENT’S DAY
ALL TIMES ARE IN EASTERN STANDARD TIME

WINDY MID-WINTER COLD AND 15 INCHES SNOW ON GROUND
UNDER CLEAR AND VERY SUNNY CONDITIONS

After reaching a high temperature of 30 degrees Sunday
afternoon the thermometer fell steadily all of last night
reaching 19 degrees by midnight and 9.3 degrees just before
7 A.M. this morning.

The air mass became more Arctic in origin overnight
last night with dew points falling to around 4 to 5
below zero by sunrise this morning.

Total snow on the ground continues at a depth of more
than a foot today and was measured at 15 inches
early this morning.

LAST STORM STATISTICS, 2/15-2/16:
Total Snow: 7.6 inches
Total Liquid: 0.71 inches
Peak Gust: 45 mph NW

Today’s Observations:

7 A.M.
Weather: Clear, stratocumulus layer, few lower cumulus offshore
distant NE-SE
Temperature: 10F; Dew Point: -4F; Wind: WNW at 10 kts,
Sea-level pressure: 30.13 ins. Hg, rising then more quickly
Visibility: 60 miles
6-hr min temp:  9F
6-hr max temp: 18F
Snow depth: 15 inches
BHO SA 1155 CLR 60 204/10/-4/3010/013/
SC LYR FEW SML LWR CU OFFSHR DSNT NE-SE LGT DSNT HZ
WND 27V33 GST TO 21 KTS PST HR/ 8/800 4/015 53028 10018 20009

10 A.M.
Weather: Clear, perfectly clear sky, SKC
Temperature: 18F Dew Point: -5F; Wind: NW at 14G20 kts,
Wind: Directional visibility 65 miles, WNW 70 miles
Sea-level pressure: 30.22 ins. Hg, rising, then more slowly
Visibility: 65 miles, NW 70 miles, light distant haze
BHO SA 1455 CLR 65 232/18/-5/3214G20/022/ SKC VSBY WNW 70
LGT DSNT HZ/ WND 27V35/ 51028

1 P.M.
Weather: Clear, perfectly clear sky, SKC
Temperature: 25F; Dew Point: -4F; Wind: W at 16G23 kts
Peak Wind: 29 kts NW @ 11:55 PM
Sea-level pressure: 30.23 ins. Hg, increasing slightly
Visibility: 70 miles, NW 75 miles
6-hr max. temp: 26F
6-hr min. temp: 10F
BHO SA 1755 CLR 70 238/25/-4/3113G22/023/ SKC VSBY WNW 75
PK WND 3229/1655 WND 28V35/ 51006 10026 20010

WEATHER SUMMARY FOR SUNDAY, FEBRUARY 16, 2014

TEMPERATURE (DEGREES F)
MAX…..30    NORMAL…..37
MIN…..18    NORMAL…..19
MEAN….24    NORMAL…..28

DEPARTURE FROM 30-YEAR NORMAL…………………….-4
TOTAL DEPARTURE FOR THE MONTH……………………-19 [-1.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..41  DEPARTURE……….+4
TOTAL HEATING UNITS FOR THE MONTH………….629  DEPARTURE………+18
TOTAL HEATING UNITS FOR THE SEASON………..4142  DEPARTURE……….+4
TOTAL HEATING UNITS LAST SEASON TO DATE……3719  DIFFERENCE…….+427

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………45 WNW   AT     3:12 A.M. *
AERO…………………..46  NW   AT     2:18 A.M.
ASOS…………………..46 WNW   AT     3:12 A.M.
DAVIS………………….47 WNW   AT     3:11 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..33 NW    AT     2:26 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..32 NW    AT     2:27 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….30 NW    AT     2:27 A.M.
AVERAGE WIND SPEED AND DIRECTION………….18.3 W
ASOS………………….17.6
DAVIS…………………16.0 WNW [290 deg.]
* last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE………….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….4.47  DEPARTURE………….+2.26
ASOS…………..4.56
TOTAL PRECIPITATION FOR THE YEAR………..9.09  DEPARTURE………….+2.53
ASOS…………..9.47

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…………..-0.5
TOTAL SNOWFALL FOR THE MONTH……………27.9  DEPARTURE………….+20.0
TOTAL SNOWFALL FOR THE SEASON…………..76.7  DEPARTURE………….+35.7

PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2014 CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST
AERO: Aerovane wind recording system gust
RMY:  RMY = R.M. Young wind gust recording system added 8/9/2011
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized

2/1  45/30/38/+12/0.00/0.0/402/67         24 S   AERO 23 MPH S   RMY 25
2/2  53/33/43/+17/0.00/0.0/181/30         22 S   AERO 21 MPH WNW RMY 21
2/3  36/22/29/+3/0.32/2.8/000/00          22 NNE AERO 18 MPH NNE RMY 21
2/4  33/18/26/0/0.00/0.0/377/62           20 NW  AERO 16 MPH NW  RMY 17
2/5  31/21/26/0/1.32/10.7/000/00          32 ENE AERO 30 MPH ENE RMY 30
2/6  26/15/21/-5/0.02/0.4/398/65          22 WNW AERO 21 MPH WNW RMY 22
2/7  29/13/21/-6/0.00/0.0/615/100         25 W   AERO 23 MPH W   RMY 27
2/8  28/12/20/-7/0.00/0.0/612/99          24 W   AERO 23 MPH W   RMY 23
2/9  28/19/24/-3/0.05/1.0/112/18          21 N   AERO 17 MPH N   RMY 19
2/10 27/14/21/-6/0.00/0.0/617/99          28 NW  AERO 28 MPH NW  RMY 30
2/11 24/8/16/-11/0.00/0.0/625/100         22 WNW AERO 20 MPH WNW RMY 25
2/12 25/2/14/-13/0.00/0.0/…/..          25 NNW AERO 23 MPH NW  RMY 21
2/13 33/19/26/-2/…./…/000/00          46 NE  AERO 51 MPH NE  RMY 51
2/14 34/27/31/+3/…./…/…/..          48 W   AERO 51 MPH WNW RMY 49 **
2/15 34/27/31/+3/…./…/…/..          35 NW  AERO 35 MPH NW  RMY 48
2/16 30/18/24/-4/…./…/…/..          45 NW  AERO 46 MPH NW  RMY N/A

2/17 morning low temp: 10F; the normaL low is now 28F

** corrections made to daily report

DAILY RECORDS FOR FEBRUARY 2014
None so far.

DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):

RECORDS FOR FEBRUARY 17
HIGH 61F IN 1981
LOW -16F IN 1896
PRECIP 1.86 INCHES IN 2003
SNOWFALL 20.0 INCHES IN 2003
PEAK GUST 72 MPH NW IN 1968

RECORDS FOR FEBRUARY 18
HIGH 65F IN 1981
LOW -10F IN 1958
PRECIP 1.97 INCHES IN 1887
SNOWFALL 9.2 INCHES IN 1952
PEAK GUST 70 MPH S IN 2008

TODAY’S REPORT PREPARED BY: Robert Skilling

Category: Daily Discussions

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