Tuesday, April 8, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, APRIL 8, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

STEADY RAIN AND THICK FOG GIVE WAY TO CLEARING
BUT STILL HUMID CONDITIONS

A low pressure system that approached from the southwest
spread rain and fog late last night until mid morning today.
By 1:00 PM this afternoon rain had ended and totaled 0.66 inches
with fog reducing visibilities at times to 1/16 of a mile.

At the 1:00 PM observation a maximum of 59F had been reached
with the mercury continuing to climb. The has remained humid
as well, with dew points in the 50s.

Today’s Observations:

7 A.M.
Weather: Light rain and thick fog
Temperature: 51F; Dew Point: 51F; Wind: S at 14 kts,
Sea-level pressure: 29.50 ins. Hg, falling, then more slowly
Visibility: 1/8 of a mile, 1/2 mile S-SSW obscured by
light rain and fog
6-hr max temp: 51F
6-hr min temp: 46F
24-hr preip: 0.46 inches
BHO SA 1155 W4 X 1/8R-F 991/51/51/1814/950/ VSBY S-SSW 1/2 MI/
8//// 56025 ASOS 60035 70046 MANUAL 70046 10051 20046

10 A.M.
Weather: Thick fog
Temperature: 52F; Dew Point: 52F; Wind: S at 11 kts,
Sea-level pressure: 29.44 ins. Hg, falling, then steady
Visibility: 1/16 of a mile, obscured by thick fog
3-hr precip: 0.20 inches
BHO SA 1455 W3 X 1/16F 970/52/52/1811/944/ 8//// 56026 ASOS 60021

1 P.M.
Weather: Broken stratus fractus, overcast stratus
Temperature: 59F; Dew Point: 55F; Wind: SSW at 13G20 kts,
Sea-level pressure: 29.38 ins. Hg, steady, then falling
Visibility: 30 miles, 35 miles N, 50 miles WSW-NNW, thin fog
and haze
6-hr precip: 0.20 inches
6-hr max temp: 59F
6-hr min temp: 51F
BHO SA 1755 E8 BKN 30 OVC 30 949/59/55/2013G20/938/ VSBY N 35 MI
VSBY WSW-NNW 50 MI/ 8/6// 58019 ASOS 60021 MANUAL 60020
10059 20051

WEATHER SUMMARY FOR MONDAY, APRIL 7, 2014

TEMPERATURE (DEGREES F)
MAX…..59    NORMAL…..52
MIN…..44    NORMAL…..35
MEAN….52    NORMAL…..43

DEPARTURE FROM 30-YEAR NORMAL…………………….+9
TOTAL DEPARTURE FOR THE MONTH……………………+15 [+1.9 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..13  DEPARTURE……….-9
TOTAL HEATING UNITS FOR THE MONTH………….145  DEPARTURE………-15
TOTAL HEATING UNITS FOR THE SEASON………..5772  DEPARTURE……..+128
TOTAL HEATING UNITS LAST SEASON TO DATE……5189  DIFFERENCE…….+583

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………28  SSE  AT   3:12 P.M. *
AERO…………………..N/A
ASOS…………………..29  S    AT   3:10 P.M.
DAVIS………………….28  S    AT  12:51 P.M. RMY 34
FASTEST MILE FOR YESTERDAY………………..21  SSE  AT   3:09 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..22  S    AT   3:15 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….21  S    AT   1:01 P.M.
AVERAGE WIND SPEED AND DIRECTION…………10.5  ESE
ASOS…………………10.0
DAVIS………………..9.3  S [169 deg] * Last of several occurrences…

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.46  DEPARTURE………….+0.29
ASOS…………..0.46
TOTAL PRECIPITATION FOR THE MONTH……….0.96  DEPARTURE………….-0.23
ASOS…………..0.94
TOTAL PRECIPITATION FOR THE YEAR……….16.08  DEPARTURE………….+0.89
ASOS………….16.48

SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0  DEPARTURE…………..-0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.0  DEPARTURE…………..-1.2
TOTAL SNOWFALL FOR THE SEASON…………..84.8  DEPARTURE………….+23.9

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  59/44/52/+9/…./…/…/..          28 SSE AERO N/A        RMY N/A

4/8  morning low temp: 42F; 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 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

RECORDS FOR APRIL 9
HIGH 83 IN 1991
LOW 18 IN 1888
PRECIP 2.38 IN. IN 1935
SNOWFALL 11.0 IN. IN 1917
PEAK GUST 72 MPH WNW IN 1962

TODAY’S REPORT PREPARED BY: Brian Fitzgerald