Tuesday, April 29, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
TUESDAY, APRIL 29, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
LOW OVERCAST, VERY COOL WITH NORTHEAST WINDS
PERIOD OF MOSTLY VERY LIGHT DRIZZLE
The temperature is struggling into the low 40’s
early this afternoon some 20 degrees colder than
normal after a morning low of 39 degrees.
A deck of persistent low stratus clouds has
prevented any sunshine today with prevailing NE winds.
Today’s Observations:
7 A.M.
Weather: Scattered stratocumulus, overcast stratocumulus, precip.
visible ESE-S, drizzle began 6:10 A.M. and ended 6:30 A.M.
Temperature: 40F; Dew Point: 35F; Wind: NE at 10G22 kts,
Wind: Direction variability NNE-E
Sea-level pressure: 30.40 ins. Hg, rising, then more quickly
Visibility: 20 miles, except 12 miles ESE-S in precipitation
in the form of light drizzle
6-hr max temp: 41F
6-hr min temp: 39F
6-hr precip: trace
24-hr precip: trace
BHO SA 1155 E17 BKN 23 OVC 20 295/40/35/0510G22/040/
VSBY ESE-S 12/PCPN/DZ THN DSNT FG LB10E30 WND 02V08/
8/6// 53032 MANUAL 6000/ 10041 20039
10 A.M.
Weather: Broken stratus, overcast stratus/stratocumulus
Temperature: 40F; Dew Point: 35F; Wind: NE at 14G23 kts,
Wind: Direction variability NNR-E
Sea-level pressure: 30.46 ins. Hg, rising
Visibility: 15 miles, patches drizzle
3-hr precip: trace
BHO SA 1455 E14 BKN 20 OVC 15 315/40/35/0614G23/046/
FEW BRGHT SPTS IOVC PTCHS DZ VC LBEUKN WND 02V08/
8/6// 53020 MANUAL 6000/
1 P.M.
Weather: Low overcast stratus, light drizzle occurring (very light)
Temperature: 40F; Dew Point: 36F; Wind: ENE at 14G20 kts
Wind: Direction variable NNE-E
Sea-level pressure: 30.49 ins. Hg, rising
Visibility: 10 miles light drizzle (very light)
6-hr max temp: 41F
6-hr min temp: 39F
6-hr precip: trace
BHO SA 1755 E14 OVC 10L- 326/40/36/0714G20/049/ LBUKN PCPN VRY LGT
WND 02V10/ 8/6// 53011 MANUAL 6000/ 10041 20039
WEATHER SUMMARY FOR MONDAY, APRIL 28, 2014
TEMPERATURE (DEGREES F)
MAX…..56 NORMAL…..61
MIN…..36 NORMAL…..42
MEAN….46 NORMAL…..52
DEPARTURE FROM 30-YEAR NORMAL…………………….-6
TOTAL DEPARTURE FOR THE MONTH……………………+27 [+0.8 DEGREE/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..19 DEPARTURE……….+5
TOTAL HEATING UNITS FOR THE MONTH………….495 DEPARTURE………-30
TOTAL HEATING UNITS FOR THE SEASON………..6122 DEPARTURE……..+113
TOTAL HEATING UNITS LAST SEASON TO DATE……5507 DIFFERENCE…….+615
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………31 ENE AT 9:43 P.M
AERO…………………..N/A
ASOS…………………..32 ENE AT 11:53 P.M.
DAVIS………………….33 NE AT 9:43 P.M. RMY 35
FASTEST MILE FOR YESTERDAY………………..22 ENE AT 11:27 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE……………..22 ENE AT 11:29 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….20 NW AT 10:25 P.M.
AVERAGE WIND SPEED AND DIRECTION…………11.6 ENE
ASOS…………………12.2
DAVIS…………………9.8 NNE [020 deg]
* last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….trace DEPARTURE………….-0.14
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.63 DEPARTURE………….-0.66
ASOS…………..3.60
TOTAL PRECIPITATION FOR THE YEAR……….18.75 DEPARTURE………….+0.46
ASOS………….19.14
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE…………..-0.1
TOTAL SNOWFALL FOR THE MONTH…………….0.8 DEPARTURE…………..-2.2
TOTAL SNOWFALL FOR THE SEASON…………..85.6 DEPARTURE………….+22.9
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/-1/0.00/0.0/694/91 29 NNE AERO N/A RMY N/A
4/2 56/34/45/+4/0.00/0.0/452/69 22 WSW AERO 20 MPH WSW RMY N/A
4/3 55/36/46/+4/0.00/0.0/707/92 23 NNW AERO 22 MPH NW RMY 25
4/4 47/35/41/-1/0.31/0.0/255/33 26 ESE AERO N/A RMY 25
4/5 51/33/42/-1/0.19/0.0/186/24 39 WNW AERO N/A RMY 40
4/6 58/29/44/+1/0.00/0.0/755/97 25 W AERO N/A RMY N/A
4/7 59/44/52/+9/0.05/0.0/187/24 28 SSE AERO N/A RMY N/A
4/8 62/41/52/+8/0.61/0.0/016/02 45 W AERO N/A RMY 44
4/9 60/36/48/+4/0.00/0.0/707/90 35 NW AERO N/A RMY 36
4/10 57/33/45/0/0.00/0.0/742/94 38 S AERO N/A RMY 39
4/11 70/45/58/+13/T/0.0/111/14 32 S AERO N/A RMY N/A
4/12 68/44/56/+11/0.00/0.0/699/88 28 W AERO N/A RMY 28
4/13 65/45/55/+10/0.04/0.0/215/27 35 S AERO N/A RMY N/A
4/14 73/55/64/+18/0.00/0.0/296/37 55 SW AERO N/A RMY 62
4/15 66/38/52/+5/1.22/0.0/000/00 62 S AERO N/A RMY 68
4/16 43/28/36/-11/0.43/0.8/757/94 39 NNW AERO N/A RMY 39
4/17 39/29/34/-13/T/T/566/70 35 NE AERO N/A RMY 34
4/18 42/28/35/-13/0.00/0.0/016/02 25 E AERO N/A RMY 25
4/19 62/35/49/1/0.00/0.0/732/90 31 NW AERO N/A RMY 32
4/20 52/36/44/-5/0.00/0.0/783/96 21 E AERO N/A RMY 22
4/21 67/36/52/+3/0.00/0.0/778/95 25 SSW AERO N/A RMY 26
4/22 72/44/58/+9/0.07/0.0/427/52 32 S AERO N/A RMY 33
4/23 52/43/48/-2/0.27/0.0/…/.. 47 NW AERO N/A RMY 47
4/24 56/38/47/-3/0.00/0.0/…/.. 52 NW AERO N/A RMY 54
4/25 64/39/52/+2/0.00/0.0/…/.. 25 S AERO N/A RMY 25
4/26 44/39/42/-9/…./0.0/…/.. 18 E AERO N/A RMY 18
4/27 46/38/42/-9/…./0.0/…/.. 21 NW AERO N/A RMY 23
4/28 56/36/46/-6/T/0.0/…/.. 31 ENE AERO N/A RMY 33
4/29 morning low temp: 39F; the normal low is now 43F
DAILY RECORDS FOR APRIL 2014
4/14 – Minimum temperature of 55F EQUALS RECORD HIGH
MINIMUM FOR THIS DATE SET IN 1909.
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
RECORDS FOR APRIL 29
HIGH 85 IN 1974
LOW 26 IN 1909
PRECIP 1.65 IN 1923
SNOWFALL 1.0 IN. IN 1987
PEAK GUST 55 MPH WNW IN 2010
RECORDS FOR APRIL 30
HIGH 86 IN 1942
LOW 30 IN 1931
PRECIP 1.41 IN 1991
SNOWFALL 0.3 IN. IN 1909
PEAK GUST 64e MPH NW IN 1978
TODAY’S REPORT PREPARED BY: Robert Skilling
