BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, NOVEMBER 21, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME SEASONABLE COOLER WEATHER RETURNS TODAY...CLOUDS THIS MORNING DEPART WITH BRIGHT SUNSHINE THIS AFTERNOON... Middle and high level clouds moved through this morning as the temperature dropped from the upper 50's yesterday afternoon to the middle 30's this morning. The maximum temperature for the day has only reached the middle 40s as of the 1 PM EST observation. Clouds have diminished this afternoon with a few middle level clouds and higher cirrus decorating the sky. At the 1 PM observation, a few altocumulus clouds were observed to be dropping some virga within a larger patch of altocumulus to the northwest. The visibility has been very high all day near 75 miles due to much drier air with the dew points falling into the 20s today. Today's Observations: 7 A.M. Weather: Scattered altostratus, overcast cirrus fibratus and cirrostratus, few altocumulus distant SE-SSE, breaks in overcast NE and SSE-WNW, thin spots in overcast all quadrants Temperature: 35F; Dew Point: 23F; Wind: N at 10 kts Sea-level pressure: 30.29 ins. Hg, rising Visibility: 75 miles 6-hr Max temp: 40F 6-hr Min temp: 35F 24-hr precip: 0.00 ins. BHO SA 1155 200 SCT E250 OVC 75 258/35/23/3510/029/ FEW AC DSNT SE-SSE BINOVC DSNT NE AND SSE-WNW THN SPTS IOVC ALQDS/ 8/076 51023 10040 20035 10 A.M. Weather: Broken altocumulus, few cumulus distant SE, few cirrus N Temperature: 42F; Dew Point 36F; Wind: NNE at 10 kts, Sea-level pressure: 30.30 ins. Hg, rising slightly Visibility: 75 miles BHO SA 1455 E180 BKN 75 260/42/36/0310/030/ FEW CU DSNT SE FEW CI N/ 8/031 53002 1 P.M. Weather: Scattered altocumulus (2 layers), thin scattered cirrus fibratus, few altocumulus with virga NW Temperature: 45F; Dew Point: 31F; Wind: NE at 9 kts Sea-level pressure: 30.23 ins. Hg. falling then more quickly Visibility: 75 miles 6-hr max. temp. 46F 6-hr min. temp. 35F BHO SA 1755 140 SCT 180 SCT 250 -SCT 75 236/45/31/0509/023/ FEW AC/VIRGA NW/ 8/031 58024 10046 20035 SUMMARY FOR FRIDAY, NOVEMBER 20, 2015 TEMPERATURE (DEGREES F) MAX.....58 NORMAL.....49 MIN.....41 NORMAL.....32 MEAN....50 NORMAL.....40 DEPARTURE FROM 30-YEAR NORMAL.....................+10 TOTAL DEPARTURE FOR THE MONTH....................+131 [+6.4 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............15 DEPARTURE.........-10 TOTAL HEATING UNITS FOR THE MONTH.............302 DEPARTURE........-130 TOTAL HEATING UNITS FOR THE SEASON............756 DEPARTURE........-239 TOTAL HEATING UNITS LAST SEASON TO DATE.......889 DIFFERENCE.......-133 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY...................43 SSE AT 3:05 A.M. ASOS........................48 SSE AT 2:41 A.M. DAVIS.......................46 SSE AT 2:39 A.M. RMY N/A FASTEST MILE FOR YESTERDAY.....................33 SSE AT 3:04 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE..................29 SSE AT 3:05 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE.................31 SSE AT 3:04 A.M. AVERAGE WIND SPEED AND DIRECTION...............15.4 NW ASOS........................14.4 DAVIS.......................13.4 WNW [286 Deg.] * Last of several occurrences PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00 DEPARTURE.....-0.16 ASOS...............0.00 TOTAL PRECIPITATION FOR THE MONTH...........1.98 DEPARTURE.....-1.17 ASOS...............2.02 TOTAL PRECIPITATION FOR THE YEAR...........38.81 DEPARTURE.....-8.11 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 low since midnight is 35F; normal low is now 32F 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 21 HIGH 69 IN 1931 LOW 10 IN 1888 PRECIP 2.60 INCHES IN 1950 SNOWFALL 4.0 INS IN 1929 PEAK GUST 69 NW IN 1989 RECORDS FOR NOVEMBER 22 HIGH 70 IN 1931 LOW 12 IN 1987 PRECIP 1.78 INS IN 2005 SNOWFALL 9.0 INS IN 1971 PEAK GUST 70e SE IN 1945 TODAY'S REPORT PREPARED BY: Mike Iacono