Monday, November 23, 2015

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

DAILY DISCUSSION AND CLIMATE SUMMARY
MONDAY, NOVEMBER 23, 2015
ALL TIMES ARE IN EASTERN STANDARD TIME

COLD FRONT CLEARS THE COAST OVERNIGHT,
CLEAR SKIES AND COLD AIR IN PLACE FOLLOWING RAINY SUNDAY

Rain showers began off and on yesterday as a cold front
slid up the coast, bringing 0.42 inches of new precipitation.
Brilliant blue skies and cold, dry air quickly moved into
place this morning by the 7:00 AM EST observation, where
temperatures dipped briefly below freezing just thereafter.

By the 1:00 PM EST observation skies were nearly completely
clear. Visibility was 80 miles in all directions with dew
points dropping into the lower teens. A maximum temperature
of 40F had been recorded.
Today’s Observations:

7 A.M.
Weather: Scattered stratocumulus
Temperature: 32F; Dew Point: 23F; Wind: NNW at 11 kts
Sea-level pressure: 29.87 ins. Hg, rising, then more slowly
Visibility: 80 miles, except 40 miles NE-SSE, thin fog NE-SSE
6-hr Max temp: 36F
6-hr Min temp: 32F
24-hr precip: 0.42 ins.
BHO SA 1155 50 SCT 80 114/32/23/3311/987/ VSBY NE-SSE 40 MI
THN FG NE-SSE/ 8/500 51018 ASOS 70040 MANUAL 70042 10036 20032

10 A.M.
Weather: Clear, few altocumulus distant NE-SE,
few cirrus distant NE-SE
Temperature: 36F; Dew Point 22F; Wind: NW at 13G20 kts,
Sea-level pressure: 29.91 ins. Hg, rising, then more slowly
Visibility: 80 miles
BHO SA 1455 CLR 80 127/36/22/3213G20/991/ FEW AC DSNT NE-SE
FEW CI DSNT NE-SE/ 8/031 51013

1 P.M.
Weather: Clear, few stratocumulus distant offshore ENE-SE,
few cirrus distant ENE-SE
Temperature: 38F; Dew Point: 17F; Wind: NW at 14G18 kts
Sea-level pressure: 29.89 ins. Hg. falling, then more slowly
Visibility: 80 miles
6-hr max. temp. 40F
6-hr min. temp. 32F
BHO SA 1755 CLR 80 122/38/17/3114G18/989/ FEW SC DSNT OFFSHR
NE-SSE FEW CI DSNT ENE-SE/ 8/501 56005 10040 20032
SUMMARY FOR SUNDAY, NOVEMBER 22, 2015

TEMPERATURE (DEGREES F)
MAX…..45   NORMAL…..48
MIN…..35   NORMAL…..32
MEAN….40   NORMAL…..40

DEPARTURE FROM 30-YEAR NORMAL………………….+0
TOTAL DEPARTURE FOR THE MONTH………………..+131  [+5.8 DEGREES/DAY]

HEATING DEGREE DAYS (SEASON JUL TO JUN)
TOTAL HEATING UNITS FOR YESTERDAY…………..25   DEPARTURE……….+0
TOTAL HEATING UNITS FOR THE MONTH………….351   DEPARTURE……..-131
TOTAL HEATING UNITS FOR THE SEASON…………805   DEPARTURE……..-240
TOTAL HEATING UNITS LAST SEASON TO DATE…….959   DIFFERENCE…….-154

PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY……………….26 NW  AT  11:35 P.M.
ASOS……………………31 NNW AT  11:21 P.M.
DAVIS…………………..27 NW  AT  11:35 P.M. RMY 28
FASTEST MILE FOR YESTERDAY…………………22 NW  AT  11:34 P.M.
MAXIMUM 2-MINUTE ASOS AVERAGE………………21 NNW AT  11:38 P.M.
MAXIMUM 2-MINUTE DAVIS AVERAGE……………..18 SE  AT   7:55 A.M.
AVERAGE WIND SPEED AND DIRECTION……………10.0 N
ASOS……………………10.1
DAVIS……………………8.8 NE [043 Deg.] * Last of several occurrences

PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M…..0.42  DEPARTURE…..+0.26
ASOS……………0.40
TOTAL PRECIPITATION FOR THE MONTH………..2.40  DEPARTURE…..-1.07
ASOS……………2.42
TOTAL PRECIPITATION FOR THE YEAR………..39.23  DEPARTURE…..-8.01
ASOS…………….N/A ***
*** ASOS annual total not available due to erroneous readings

PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER CALENDAR DAY DATA
DATA REPORTED:
DATE: MAX/MIN/MEAN/DEP/PRECIP/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

11/1  59/45/52/+6/T/006/01                  30 SSW RMY 31
11/2  62/47/55/+9/0.00/476/77               24 W   RMY N/A
11/3  71/44/58/+12/0.00/616/100             25 W   RMY 25
11/4  66/49/58/+13/0.00/601/98              22 SSW RMY N/A
11/5  72/51/62/+17/0.00/281/46              31 SW  RMY 36
11/6  71/60/66/+21/0.00/109/18              35 SSW RMY 38
11/7  64/46/55/+10/0.00/029/04              33 WNW RMY 35
11/8  54/39/47/+3/0.00/591/98               26 NW  RMY 30
11/9  59/38/49/+5/0.00/577/96               20 W   RMY 21
11/10 53/45/49/+5/…./000/00               28 NE  RMY N/A
11/11 48/43/46/+3/…./000/00               41 NE  RMY N/A
11/12 55/42/49/+6/…./000/00               28 S   RMY 30
11/13 57/41/49/+6/…./385/65               40 WSW RMY 47
11/14 45/31/38/-4/0.00/425/72               40 NW  RMY 47
11/15 51/31/41/-1/0.00/…/..               25 W   RMY 27
11/16 59/36/48/+6/0.00/…/..               25 NNW RMY 29
11/17 45/28/37/-4/0.00/…/..               18 NNE RMY N/A
11/18 50/35/43/+2/0.00/…/..               17 SSE RMY N/A
11/19 55/38/47/+6/…./…/..               29 SSE RMY N/A
11/20 58/41/50/+10/…./…/..              43 SSE RMY N/A
11/21 46/35/41/+1/0.00/…/..               20 ENE RMY 21
11/22 45/35/40/+0/…./000/00               26 NW  RMY 28

11/23 low since midnight is 32F; normal low is now 31F

DAILY RECORDS FOR NOVEMBER 2015

**11/6 DAILY RECORD MAXIMUM TEMPERATURE OF 71F
TIES PREVIOUS RECORD OF 71F SET IN 1959

**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
BREAKS PREVIOUS RECORD OF 58F SET IN 1938

**11/6 DAILY RECORD HIGH MINIMUM TEMPERATURE OF 60F
TIES PREVIOUS MONTHLY RECORD OF 60F SET ON
11/8/1996

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

RECORDS FOR NOVEMBER 23
HIGH 73 IN 1931
LOW 9 IN 1888
PRECIP 2.33 INS IN 2006
SNOWFALL 5.5 INS IN 1989
PEAK GUST 64e S IN 1953

RECORDS FOR NOVEMBER 24
HIGH 69 IN 1931
LOW 7 IN 1897
PRECIP 1.76 INCHES IN 1901
SNOWFALL 4.5 INS IN 1936
PEAK GUST 69 SSW IN 1959

TODAY’S REPORT PREPARED BY: Brian Fitzgerald