Tuesday, April 14, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, APRIL 14, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

MAXIMUM TEMPERATURE OF 69F YESTERDAY MARKS WARMEST
DAY SINCE OCTOBER OF LAST YEAR

Generally clear skies and a warm southerly flow yesterday
allowed for the warmest temperatures of the year so far,
as a maximum of 69F was reached prior to the 1:00 PM EST
observation.

Overnight, temperatures only dipped to 50F as clouds and
humidity were on the rise. By 6:41 AM EST this morning,
rain began ahead of a cold front, dropping a quick
0.05 inches of new rain, before ending at 7:52 AM EST.

Clear skies and excellent visibility became visible
not long after the passage of showers, and by the
1:00 PM EST observation a maximum of 63F had been reached.

—————————————————–

Today’s Observations:

7 A.M.
Weather: Light rain, began at 6:41 AM EST, broken stratocumulus,
overcast stratus
Temperature: 57F; Dew Point: 53F; Wind: W at 10 kts,
Sea-level pressure: 30.11 ins. Hg, increasing then more quickly
Visibility: 12 miles, except 8 miles SW, obscured by light rain
6-hr Max temp: 57F
6-hr Min temp: 53F
6-hour precip: 0.01 inches
BHO SA 1155 E23 BKN 30 OVC 12R- 196/57/53/2610/011/
R-B41 VSBY SW 8 MI/ 8/6// 53021 MANUAL 60001 70001 10057 20053

10 A.M.
Weather: Broken altostratus undulatus, few cumulus fractus
distant SE-S
Temperature: 57F; Dew Point: 43F; Wind: WNW at 10G16 kts,
Sea-level pressure: 30.16 ins. Hg, rising, then more quickly
Visibility: 40 miles, except 80 miles W-N
3-hr precip: 0.04 inches
BHO SA 1455 E60 BKN 40 214/57/43/3010G16/016/ VSBY W-N 80 MI
FEW CUFRA SE-S/ 8/72/ 53018 ASOS 60005 MANUAL 60004

1 P.M.
Weather: Broken altostratus, few stratocumulus distant E-SSW
Temperature: 62F; Dew Point: 33F; Wind: WNW at 11kts
Sea-level pressure: 30.12 ins. Hg, falling then more slowly
Visibility: 60 miles, except 80 W-NE
6-hr Max temp: 63F
6-hr Min temp: 52F
6-hr precip: 0.04 inches
BHO SA 1755 E200 BKN 60 200/62/33/2911/012/ VSBY W-NE 80 MI
FEW SC E-SSW/ 8/510 56014 ASOS 60005 MANUAL 60004 10063 20052
SUMMARY FOR MONDAY, APRIL 13, 2015

TEMPERATURE (DEGREES F)
MAX…..69   NORMAL…..55
MIN…..47   NORMAL…..37
MEAN….58   NORMAL…..46

DEPARTURE FROM 30-YEAR NORMAL………………….+12
TOTAL DEPARTURE FOR THE MONTH…………………..-3 [-0.4 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY……………7  DEPARTURE……….-12
TOTAL HEATING UNITS FOR THE MONTH………….284  DEPARTURE………..+3
TOTAL HEATING UNITS FOR THE SEASON………..6027  DEPARTURE………+262
TOTAL HEATING UNITS LAST SEASON TO DATE……5848  DIFFERENCE……..+179

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………35 SSW AT  11:34 P.M.*
ASOS…………………..37 SSW AT  10:52 P.M.
DAVIS………………….38 SSW AT  10:53 P.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..29 SSW AT  10:53 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..30 SSW AT  11:35 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….29 SSW AT  10:53 P.M.
AVERAGE WIND SPEED AND DIRECTION…………16.0 S
ASOS…………………16.0
DAVIS………………..14.2 SSW [205 degrees] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.01  DEPARTURE…..-0.15
ASOS……………0.00
TOTAL PRECIPITATION FOR THE MONTH………..1.44  DEPARTURE…..-0.76
ASOS……………1.38
TOTAL PRECIPITATION FOR THE YEAR………..16.03  DEPARTURE…..-0.04
ASOS…………….N/A ***
*** ASOS annual totals not available due to erroneous readings

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M………..0.0  DEPARTURE…..-0.1
TOTAL SNOWFALL FOR THE MONTH……………Trace  DEPARTURE…..-2.0
TOTAL SNOWFALL FOR THE SEASON…………..150.8  DEPARTURE….+89.1

PRELIMINARY CLIMATE SUMMARY FOR APRIL CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY 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  44/26/35/-6/0.00/0.0/748/98              30 WNW RMY 31
4/2  59/29/44/+3/T/0.0/375/49                 39 SSW RMY 43
4/3  56/47/52/+10/0.02/0.0/000/00             36 SW  RMY N/A
4/4  49/32/41/-1/…./0.0/501/65              54 NW  RMY 64
4/5  47/30/39/-4/…./0.0/464/60              40 W   RMY 45
4/6  48/33/41/-2/0/00/0.0/544/70              18 NE  RMY N/A
4/7  39/34/37/-6/…./0.0/000/00              21 NE  RMY N/A
4/8  41/32/37/-7/…./T/000/00                30 ENE RMY 32
4/9  35/32/34/-10/…./0.0/000/00             31 ENE RMY 32
4/10 53/35/44/-1/…./0.0/000/00              31 SW  RMY N/A
4/11 56/38/46/+1/0.00/0.0/…/..              39 WNW RMY 48
4/12 68/35/52/+7/0.00/0.0/…/..              23 WNW RMY 23
4/13 69/47/58/+12/0.00/0.0/…/..             35 SSW RMY N/A

4/14 low since midnight is 52F normal low is 37F

DAILY RECORDS FOR APRIL 2015

4/3 – NEW RECORD DAILY HIGH MINIMUM TEMPERATURE: 47F
surpasses the previous record of 46F in 1892

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

RECORDS FOR APRIL 14
HIGH 80 IN 1945
LOW 21 IN 1923
PRECIP 2.22 IN. IN 1895
SNOWFALL 8.4 IN. IN 1953
PEAK GUST 71e MPH W IN 1943

RECORDS FOR APRIL 15
HIGH 81 IN 1896
LOW 23 IN 1943
PRECIP 1.75 IN. IN 2007
SNOWFALL 1.0 IN. IN 1916, 1962
PEAK GUST 66 MPH E IN 2007

TODAY’S REPORT PREPARED BY:  Brian Fitzgerald