Wednesday, April 2, 2014

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

DAILY DISCUSSION AND CLIMATE SUMMARY
WEDNESDAY, APRIL 2, 2014
ALL TIMES ARE IN EASTERN STANDARD TIME

MARCH 2014 PRELIMINARY STATISTICS

[Departures are relative to the 1981-2010 averages]

TEMPERATURE: Deg. F
Avg. Max. 40.5 [-3.8] Avg. Min. 22.0 [-4.6] Mean      31.3 [-4.2] 24-hr. corrected mean: 31.1
Max. temp: 57 on the 28th
Min. temp: 6 on the 4th
Total heating degree day units: 1,036 [+120] Total seasonal heating units:  5,627  [+143] [Season starts 7/1] Seasonal total this date 2012: 5,020 [+607]

PRECIPITATION: Inches
Total: 5.03 [-0.55] Greatest in 24 hours: TBD ()
Total snowfall: 3.0 inches [-9.7] Greatest in 24 hours:  1.4 inches on the 13th

WIND
Av. speed (uncorrected): 12.7 mph
Av. speed (corrected):   13.1 mph
Prevailing direction: NW @ 13% possible

SUNSHINE
Total astronomical minutes: 10,395 of possible 22,247 or 47%
Total Campbell Stokes card minutes; 10,056 of possible 21,516 or 47% [-2%]

additional data will become available next few days…

Today’s Observations:

7 A.M.
Weather: Scattered dense ci, thin scattered cirrus [2 layers],
cirrus layers increasing
Temperature: 39F; Dew Point: 27F; Wind: W at 8 kts,
Sea-level pressure: 30.12 ins. Hg, rising
Visibility: 60 miles, thin smoke layer along horizon NNE,
visibility NNE 20 miles, distant haze
6-hr max temp: 39F
6-hr min temp: 34F
24-hr precip: None
BHO SA 1155 200 SCT 250 –SCT 300 –SCT 60 200/39/27/2708/012/
DNS CI LYR XTDNG SSE-W CI INVADING THN K LYR ALG HRZN NNE
VSBY NNE 20 DSNT HZ/ 8/006 53009 10039 20034

10 A.M.
Weather: Scattered high altocumulus, overcast dense cirrostratus,
sun dimly visible
Temperature: 47F; Dew Point: 21F; Wind: SW at 7 kts,
Sea-level pressure: 30.12 ins. Hg, about steady
Visibility: 60 miles, except 20 miles NNE-ENE, thin smoke layer
along horizon NNE-ENE, NW 70 miles distant haze all quadrants
BHO SA 1455 160 SCT E200 OVC 60 199/47/21/2307/012/ SUN DMLY VSB
THN K LYR ALG HRZN NNE-ENE VSBY NNE-ENE 20 VSBY NW 70 DSNT HZ/
8/037 56001

1 P.M.
Weather: Broken altostratus, overcast dense cirrostratus
Temperature: 52F; Dew Point: 27F; Wind: W at 11 kts,
Sea-level pressure: 30.08 ins. Hg, falling then more rapidly
Visibility: 55 miles, distant haze NE-E 25 miles hazy
6-hr max temp: 52F
6-hr min temp: 39F
BHO SA 1755 E130 BKN 200 OVC 55 187/52/27/2711/008/ VSBY NE-E 25 HAZY
DSNT HZ ALQDS/ 8/017 58012 10052 20039

WEATHER SUMMARY FOR TUESDAY, APRIL 1, 2014

TEMPERATURE (DEGREES F)
MAX…..48    NORMAL…..50
MIN…..31    NORMAL…..32
MEAN….40    NORMAL…..41

DEPARTURE FROM 30-YEAR NORMAL…………………….-1
TOTAL DEPARTURE FOR THE MONTH…………………….-1 [-1.2 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..25  DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE MONTH…………..25  DEPARTURE……….+1
TOTAL HEATING UNITS FOR THE SEASON………..5652  DEPARTURE……..+144
TOTAL HEATING UNITS LAST SEASON TO DATE……5039  DIFFERENCE…….+613

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY………………29  NNE  AT  8:25 A.M.
AERO…………………..N/A
ASOS…………………..29  N    AT 12:06 A.M.
DAVIS………………….N/A                    RMY N/A
FASTEST MILE FOR YESTERDAY………………..17  NNW  AT 12:14 A.M. *
MAXIMUM 2-MINUTE ASOS AVERAGE……………..20  N    AT 12:59 A.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE…………….N/A
AVERAGE WIND SPEED AND DIRECTION………… 10.5 NNW
ASOS………………….10.3
DAVIS………………… 9.4 NNE [20 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……….0.00  DEPARTURE………….-0.17
ASOS…………..0.00
TOTAL PRECIPITATION FOR THE YEAR……….15.12  DEPARTURE………….-0.74
ASOS………….15.55

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…………..-0.2
TOTAL SNOWFALL FOR THE SEASON…………..84.8  DEPARTURE………….+24.9

PRELIMINARY CLIMATE SUMMARY FOR MARCH 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

3/1  34/12/23/-8/0.00/0.0/458/68          28 SSW AERO 29 MPH SSW RMY 30
3/2  37/28/33/2/T/T/014/02                22 SW  AERO 22 MPH SW  RMY 29
3/3  28/11/20/-12/0.00/0.0/000/00         29 NNW AERO 30 MPH NNW RMY N/A
3/4  29/6/18/-14/0.00/0.0/444/65          17 SW  AERO 16 MPH SW  RMY 17
3/5  27/16/22/-10/0.02/0.3/000/00         21 NE  AERO 20 MPH N   RMY 23
3/6  26/7/17/-15/0.00/0.0/689/100         23 NNW AERO 23 MPH NNW RMY N/A
3/7  35/16/26/-7/0.00/0.0/449/65          18 SE  AERO 17 MPH SE  RMY 18
3/8  52/27/40/+7/0.00/0.0/673/97          26 NW  AERO 29 MPH NNW RMY 27
3/9  40/25/33/0/0.00/0.0/669/96           28 NW  AERO 29 MPH NW  RMY 29
3/10 42/26/34/+1/0.03/0.8/196/28          21 S   AERO 22 MPH S   RMY 27
3/11 56/34/45/+11/0.00/0.0/450/64         33 W   AERO 33 MPH W   RMY 34
3/12 53/34/44/+10/0.50/T/120/17           29 NNW AERO 30 MPH NNW RMY 30
3/13 33/12/23/-11/0.14/1.4/007/01         43 NW  AERO 45 MPH NW  RMY 45
3/14 37/10/24/-11/0.00/0.0/498/70         39 SSW AERO 41 MPH SSW RMY 42
3/15 54/35/45/+10/0.01/0.0/450/63         50 WNW AERO 58 MPH WNW RMY 54
3/16 34/21/28/-7/0.00/0.0/509/71          36 W   AERO 36 MPH WNW RMY 37
3/17 30/13/22/-14/0.00/0.0/562/78         25 N   AERO 26 MPH N   RMY 19
3/18 35/16/26/-10/0.00/0.0/701/97         18 ENE AERO 16 MPH ENE RMY 18
3/19 44/23/34/-2/T/0.0/428/59             24 E   AERO 23 MPH E   RMY 26
3/20 51/35/43/+6/0.30/0.0/190/26          36 W   AERO 37 MPH W   RMY 39
3/21 42/29/36/-1/0.00/0.0/242/33          40 W   AERO 41 MPH W   RMY 42
3/22 55/26/41/+4/T/0.0/404/55             52 WNW AERO 52 MPH WNW RMY 53
3/23 43/20/32/-6/0.00/0.0/052/07          32 NNW AERO 32 MPH NNW RMY N/A
3/24 32/13/23/-15/0.00/0.0/725/98         37 N   AERO 36 MPH N   RMY 36
3/25 38/17/28/-10/0.00/0.0/550/74         25 SSW AERO 22 MPH SSW RMY N/A
3/26 32/20/26/-13/T/0.1/022/03            54 NW  AERO 56 MPH NW  RMY 55
3/27 45/17/31/-8/0.00/0.0/659/88          35 NW  AERO 33 MPH NW  RMY 31
3/28 57/33/45/+6/0.06/0.0/038/05          45 SW  AERO 43 MPH SW  RMY 47
3/29 53/37/45/+5/…./0.0/196/26          39 ENE AERO 40 MPH ENE RMY 38
3/30 42/33/38/-2/…./T/000/00            40 NNE AERO 38 MPH NNE RMY 41
3/31 37/31/34/-7/…./…/000/00          33 N   AERO N/A        RMY 37

4/1  48/31/40/-1/0.00/0.0/…/..          29 NNE AERO N/A

4/2  morning low temp: 34F; the normal low is now 32F

DAILY RECORDS FOR MARCH 2014
None

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

RECORDS FOR APRIL 2
HIGH 77 IN 1967
LOW 14 IN 1919
PRECIP 1.83 IN. IN 1970
SNOWFALL 13.0 IN. IN 1887
PEAK GUST 76 MPH SSW IN 1970

RECORDS FOR APRIL 3
HIGH 76 IN 1892
LOW 16 IN 1894
PRECIP 2.18 IN. IN 1990
SNOWFALL 8.0 IN. IN 1915
PEAK GUST 83e MPH NW IN 1977 [RECORD FOR MONTH]

TODAY’S REPORT PREPARED BY: Robert Skilling/Brian Fitzgerald