Friday, March 28, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MARCH 28, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

A HUMID, WINDY DAY ATOP GREAT BLUE HILL, WITH
RAIN ON THE WAY

Following yesterday’s brilliant sunshine, this morning
began much more spring like than earlier this week. The
overnight low of 32.0 F was first time we had remained
above the freezing mark for a 24-hr period in more than
a week. For this late in the month a low of 32F is only
1 degree away from the 30-year normal low.

Showers have remained largely to our west today, though
an abundance of low level moisture has allowed thin fog
to remain in place obscuring visibility to less than 30
miles for the majority of the day. By 1:00 PM EST
temperatures had climbed to a maximum of 57F.

Today’s Observations:

7 A.M.
Weather: Scattered altocumulus, broken altostratus,
thin overcast of cirrostratus
Temperature: 37F; Dew Point: 31F; Wind: S at 15G22 kts,
Sea-level pressure: 30.17 ins. Hg, falling, then more slowly
Visibility: 15 miles, 25 miles E-S, obscured by thin fog
6-hr max temp: 37F
6-hr min temp: 34F
Snow depth: Trace
BHO SA 1155 110 SCT E140 BKN 200 –OVC 15 217/37/31/1915G22/017/
VSBY E-S 25 MI THN FG ALQDS/ 8/076 56005 10037 20034

10 A.M.
Weather: Few stratus fractus, scattered altocumulus,
overcast altostratus, sun dimly visible
Temperature: 49F; Dew Point: 34F; Wind: SSW at 17G28 kts,
Peak Wind: 28 kts SSW @ 9:49 AM EST
Sea-level pressure: 30.09 ins. Hg, falling, then steady
Visibility: 20 miles, obscured by thin fog
BHO SA 1455 110 SCT E140 OVC 20 019/49/34/2017G28/009/
FEW SC ALQDS THN FG ALQDS SUN DMLY VSBL PK WND 2028/49/ 8/777 56027

1 P.M.
Weather: Broken stratocumulus/stratus fractus, broken
altocumulus, broken altostratus, thin overcast of cirrostratus,
breaks in the overcast ENE-ESE
Temperature: 55F; Dew Point: 39F; Wind: SSW at 22G30 kts,
Peak Wind: 40 kts SW @ 12:40 PM EST
Sea-level pressure: 30.00 ins. Hg, steady then falling
Visibility: 25 miles, obscured by thin fog
6-hr max temp: 57F
6-hr min temp: 37F
BHO SA 1755 E35 BKN 140 BKN 180 BKN 250 –OVC 25 016/55/39/2122G30/000/
BINOVC ENE-ESE THN FG ALQDS PK WND 2240/28/ 8/771 58030 10057 20037

WEATHER SUMMARY FOR THURSDAY, MARCH 27, 2014

TEMPERATURE (DEGREES F)
MAX…..45    NORMAL…..48
MIN…..17    NORMAL…..30
MEAN….31    NORMAL…..39

DEPARTURE FROM 30-YEAR NORMAL…………………….-8
TOTAL DEPARTURE FOR THE MONTH…………………..-123 [-4.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..34  DEPARTURE……….+8
TOTAL HEATING UNITS FOR THE MONTH………….938  DEPARTURE……..+122
TOTAL HEATING UNITS FOR THE SEASON………..5529  DEPARTURE……..+146
TOTAL HEATING UNITS LAST SEASON TO DATE……4941  DIFFERENCE…….+588

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………35 NW   AT 12:02 A.M.
AERO…………………..33 NW   AT 12:17 A.M.
ASOS…………………..34 NW   AT 12:16 A.M.
DAVIS………………….N/A                   RMY 31
FASTEST MILE FOR YESTERDAY………………..26 NW   AT 12:02 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..24 NW   AT 12:38 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….N/A
AVERAGE WIND SPEED AND DIRECTION………… 14.9 NW
ASOS………………….14.8
DAVIS…………………13.5 W  [269 deg.]

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE………….-0.19
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….1.00  DEPARTURE………….-3.87
ASOS…………..1.01
TOTAL PRECIPITATION FOR THE YEAR……….11.09  DEPARTURE………….-2.20
ASOS………….11.55

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…………..-0.3
TOTAL SNOWFALL FOR THE MONTH…………….2.6  DEPARTURE…………..-9.0
TOTAL SNOWFALL FOR THE SEASON…………..84.4  DEPARTURE………….+25.8

PRELIMINARY CLIMATE SUMMARY FOR MARCH 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:  R.M. Young wind gust recording system
TSTM: Thunderstorm day (thunder heard some time during day)
….: Data not yet available, records not finalized

3/1  34/12/23/-8/0.00/0.0/458/68          28 SSW AERO 29 MPH SSW RMY 30
3/2  37/28/33/2/T/T/014/02                22 SW  AERO 22 MPH SW  RMY 29
3/3  28/11/20/-12/0.00/0.0/000/00         29 NNW AERO 30 MPH NNW RMY N/A
3/4  29/6/18/-14/0.00/0.0/444/65          17 SW  AERO 16 MPH SW  RMY 17
3/5  27/16/22/-10/0.02/0.3/000/00         21 NE  AERO 20 MPH N   RMY 23
3/6  26/7/17/-15/0.00/0.0/689/100         23 NNW AERO 23 MPH NNW RMY N/A
3/7  35/16/26/-7/0.00/0.0/449/65          18 SE  AERO 17 MPH SE  RMY 18
3/8  52/27/40/+7/0.00/0.0/673/97          26 NW  AERO 29 MPH NNW RMY 27
3/9  40/25/33/0/0.00/0.0/669/96           28 NW  AERO 29 MPH NW  RMY 29
3/10 42/26/34/+1/0.03/0.8/196/28          21 S   AERO 22 MPH S   RMY 27
3/11 56/34/45/+11/0.00/0.0/450/64         33 W   AERO 33 MPH W   RMY 34
3/12 53/34/44/+10/0.50/T/120/17           29 NNW AERO 30 MPH NNW RMY 30
3/13 33/12/23/-11/0.14/1.4/007/01         43 NW  AERO 45 MPH NW  RMY 45
3/14 37/10/24/-11/0.00/0.0/498/70         39 SSW AERO 41 MPH SSW RMY 42
3/15 54/35/45/+10/0.01/0.0/450/63         50 WNW AERO 58 MPH WNW RMY 54
3/16 34/21/28/-7/0.00/0.0/509/71          36 W   AERO 36 MPH WNW RMY 37
3/17 30/13/22/-14/0.00/0.0/562/78         25 N   AERO 26 MPH N   RMY 19
3/18 35/16/26/-10/0.00/0.0/701/97         18 ENE AERO 16 MPH ENE RMY 18
3/19 44/23/34/-2/T/0.0/428/59             24 E   AERO 23 MPH E   RMY 26
3/20 51/35/43/+6/0.30/0.0/190/26          36 W   AERO 37 MPH W   RMY 39
3/21 42/29/36/-1/0.00/0.0/242/33          40 W   AERO 41 MPH W   RMY 42
3/22 55/26/41/+4/T/0.0/404/55             52 WNW AERO 52 MPH WNW RMY 53
3/23 43/20/32/-6/0.00/0.0/…/..          32 NNW AERO 32 MPH NNW RMY N/A
3/24 32/13/23/-15/0.00/0.0/…/..         37 N   AERO 36 MPH N   RMY 36
3/25 38/17/28/-10/0.00/0.0/…/..         25 SSW AERO 22 MPH SSW RMY N/A
3/26 32/20/26/-13/T/0.1/…/..            54 NW  AERO 56 MPH NW  RMY 55
3/27 45/17/31/-8/0.00/0.0/…/..          35 NW  AERO 33 MPH NW  RMY 31

3/28 morning low temp: 32F; the normal low is now 31F

DAILY RECORDS FOR MARCH 2014
None so far.

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

RECORDS FOR MARCH 28
HIGH 86 IN 1998
LOW 7 IN 1923
PRECIP 2.31 INS. IN 1932
SNOWFALL 3.0 INS. IN 1932
PEAK GUST 60e MPH NW IN 1944, 60 WSW IN 1991

RECORDS FOR MARCH 29
HIGH 85 IN 1945
LOW -2 IN 1923
PRECIP 2.78 INS. IN 1984
SNOWFALL 13.5 INS. IN 1984
PEAK GUST 95 MPH ENE IN 1984

TODAY’S REPORT PREPARED BY: Brian Fitzgerald