Wednesday, April 30, 2014
BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, APRIL 30, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME
UNSEASONABLY COLD AND OVERCAST DAY YESTERDAY
HIGH TEMPERATURE OF 42F ONLY 3 SHORT OF RECORD LOW MAXIMUM
Unseasonably cold weather for late April continues
for a second day today. Yesterday’s maximum reading
of 42F was just 3 degrees above the record low maximum
for the date. Today’s high as of 2 P.M. EDT has only
been 44F while the normal maximum for this date is
61 degrees. A little rain through the morning hours
has only produced 0.03 inch through 2 P.M.
Today’s Observations:
7 A.M.
Weather: Scattered stratus fractus, stratocumulus, overcast
with nimbostratus, light rain occurring, thin fog
Temperature: 39F; Dew Point: 36F; Wind: E at 11 kts,
Sea-level pressure: 30.52 ins. Hg, rising slightly
Visibility: 12 miles, except lower southeast thru southwest,
light rain and thin fog
6-hr max temp: 39F
6-hr min temp: 38F
6-hr precip: 0.01 in.
24-hr precip: 0.01 in.
BHO SA 1155 10 SCT E70 OVC 12R- 334/39/36/0911/052/ THN F
VSBY LWR SE-SW/ 8/72/ 58006 MANUAL 6001/ ASOS 60000 MANUAL 70001
ASOS 70000 10039 20038
10 A.M.
Weather: Overcast stratocumulus
Temperature: 41F; Dew Point: 37F; Wind: E at 11 kts,
Sea-level pressure: 30.49 ins. Hg, falling slightly
Visibility: 25 miles, light distant fog
3-hr precip: 0.02 in.
BHO SA 1455 E13 OVC 25 326/41/37/1011/049/ BRGHT SPTS IOVC
THN DSNT FG/ 58008 8/5// MANUAL 6002/ ASOS 60002
1 P.M.
Weather: Overcast stratocumulus, few lower cumulus NW-N,
few bright spots in overcast, light rain shower began
at 12:53 P.M. precipitation very light
Temperature: 43F; Dew Point: 37F; Wind: ESE at 7 kts
Sea-level pressure: 30.47 ins. Hg, falling then rising slightly,
but lower than 3 hours ago
Visibility: 20 miles, hazy
6-hr max temp: 44F
6-hr min temp: 39F
6-hr precip: 0.02 in.
BHO SA 1755 E20 OVC 20 319/43/37/1107/047/ FEW BRGHT SPTS IOVC
HAZY RB53 PCPN VRY LGT/ 8/8// 55007 ASOS 60002 MANUAL 6002/
10044 20039
WEATHER SUMMARY FOR TUESDAY, APRIL 29, 2014
TEMPERATURE (DEGREES F)
MAX…..42 NORMAL…..61
MIN…..38 NORMAL…..43
MEAN….40 NORMAL…..52
DEPARTURE FROM 30-YEAR NORMAL……………………-12
TOTAL DEPARTURE FOR THE MONTH……………………+15 [+0.3 DEGREE/DAY]
HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..25 DEPARTURE………+12
TOTAL HEATING UNITS FOR THE MONTH………….520 DEPARTURE………-18
TOTAL HEATING UNITS FOR THE SEASON………..6147 DEPARTURE……..+125
TOTAL HEATING UNITS LAST SEASON TO DATE……5514 DIFFERENCE…….+633
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………32 ENE AT 5:31 A.M.
AERO…………………..N/A
ASOS…………………..35 NE AT 1:41 A.M.
DAVIS………………….32 NE AT 2:58 A.M. RMY N/A
FASTEST MILE FOR YESTERDAY………………..21 NE AT 12:47 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..23 NE AT 12:13 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….21 NE AT 12:13 A.M.
AVERAGE WIND SPEED AND DIRECTION…………15.5 ENE
ASOS…………………15.5
DAVIS………………..13.7 ENE [070 deg]
* last of several occurrences…
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.01 DEPARTURE………….-0.12
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE MONTH……….3.64 DEPARTURE………….-0.91
ASOS…………..3.60
TOTAL PRECIPITATION FOR THE YEAR……….18.76 DEPARTURE………….+0.21
ASOS………….19.14
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M……….0.0 DEPARTURE……………0.0
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 42/38/40/-12/T/0.0/…/.. 32 ENE AERO N/A RMY 35
4/30 morning low temp: 38F; 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 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
RECORDS FOR MAY 1
HIGH 87F IN 1899
LOW 29F IN 1978
PRECIP 2.53 INCHES IN 1921
SNOWFALL TRACE IN 1905,1917,1921,1995.
PEAK GUST 57 MPH NW IN 1974
TODAY’S REPORT PREPARED BY: Robert Skilling
