Monday, April 7, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, APRIL 7, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

HIGH CIRROSTRATUS CLOUDS THICKEN AHEAD OF STORM SYSTEM

A low pressure system approaching from the southwest
spread thickening high clouds across our sky today.
The system is expected to bring periods of heavy rain
by late tonight and early tomorrow before moving away.

Today’s Observations:

7 A.M.
Weather: High thin overcast cirrostratus, lower cirrostratus
layer SE-W
Temperature: 50F; Dew Point: 22F; Wind: E at 4 kts,
Sea-level pressure: 30.22 ins. Hg, rising then falling slightly
Visibility: 55 miles, ME-E 20 miles, hazy, NW 70 miles,
distant haze, inversion dissipating
6-hr max temp: 50F
6-hr min temp: 44F
BHO SA 1155 300 –OVC 55 234/50/22/1004/022/ LWR CS LYR SE-W
VSBY NE-E 25 HAZY NW 70 DSNT HZ/ 8/007 50007 10050 20044

10 A.M.
Weather:  High dense cirrostratus overcast, few altocumulus
to the WNW-NW
Temperature: 57F; Dew Point: 24F; Wind: SE at 8 kts,
Wind: Direction variable ESE-S
Sea-level pressure: 30.23 ins. Hg, rising then falling slightly
Visibility: 55 miles, except 25 miles NE-E, distant haze
BHO SA 1455 E220 OVC 55 236/57/24/1408/023/ FEW AC WNW-NW
SUN VSB WND 11V18 VSBY NE-E 25 DSNT HZ ALQDS/ 8/047 50002

WEATHER SUMMARY FOR SUNDAY, APRIL 6, 2014

TEMPERATURE (DEGREES F)
MAX…..58    NORMAL…..52
MIN…..29    NORMAL…..34
MEAN….44    NORMAL…..43

DEPARTURE FROM 30-YEAR NORMAL…………………….+1
TOTAL DEPARTURE FOR THE MONTH…………………….+6 [+0.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..21  DEPARTURE……….-1
TOTAL HEATING UNITS FOR THE MONTH………….132  DEPARTURE……….-6
TOTAL HEATING UNITS FOR THE SEASON………..5759  DEPARTURE……..+137
TOTAL HEATING UNITS LAST SEASON TO DATE……5166  DIFFERENCE…….+593

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………25  W    AT  2:11 P.M. *
AERO…………………..N/A
ASOS…………………..25  W    AT  2:11 P.M.
DAVIS………………….22  W    AT  2-3  P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..20  W    AT   1:40 A.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..18  WNW  AT  12:36 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….16  WNW  AT  11-12 A.M.
AVERAGE WIND SPEED AND DIRECTION…………11.6  W
ASOS…………………11.8
DAVIS………………..10.2  W [280 deg] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.00  DEPARTURE………….-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….0.50  DEPARTURE………….-0.52
ASOS…………..0.48
TOTAL PRECIPITATION FOR THE YEAR……….15.62  DEPARTURE………….+0.60
ASOS………….16.02

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…………..-0.2
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE…………..-1.1
TOTAL SNOWFALL FOR THE SEASON…………..84.8  DEPARTURE………….+24.0

PRELIMINARY CLIMATE SUMMARY FOR APRIL 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

4/1  48/31/40/-1/0.00/0.0/…/..          29 NNE AERO N/A        RMY N/A
4/2  56/34/45/+4/0.00/0.0/…/..          22 WSW AERO 20 MPH WSW RMY N/A
4/3  55/36/46/+4/0.00/0.0/…/..          23 NNW AERO 22 MPH NW  RMY 25
4/4  47/35/41/-1/…/0.0/…/..           26 ESE AERO N/A        RMY 25
4/5  51/33/42/-1/…/0.0/…/..           39 WNW AERO N/A        RMY 40
4/6  58/29/44/+1/0.00/0.0/…/..          25 W   AERO N/A        RMY N/A

4/7  morning low temp: 44F; the normal low is now 35F

DAILY RECORDS FOR APRIL 2014
None so far.

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

RECORDS FOR APRIL 7
HIGH 90 IN 2010
LOW 13 IN 1982
PRECIP 1.72 IN. IN 1924
SNOWFALL 4.5 IN. IN 1967, 1996
PEAK GUST 65 MPH WNW IN 1982

RECORDS FOR APRIL 8
HIGH 87 IN 1991
LOW 17 IN 1888
PRECIP 1.78 IN. IN 1956
SNOWFALL 9.3 IN. IN 1956
PEAK GUST 70 MPH S IN 2000

TODAY’S REPORT PREPARED BY: Robert Skilling