Friday, November 8, 2013

BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY FRIDAY, NOVEMBER 8, 2013 ALL TIMES ARE IN EASTERN STANDARD TIME YESTERDAY’S VERY BENEFICIAL RAINFALL REACHES TOTAL OF 0.31 INCH; MUCH COOLER TODAY, CONTINUED BREEZY; PLENTY OF CLOUDS DEVELOP BY LATE MORNING WITH A BRIEF SHOWER THIS AFTERNOON Light, steady rain that began yesterday morning and lasted into the evening totaled 0.31 inch of very beneficial rainfall. This was the most substantial rainfall since 0.56 in fell way back on October 6. A cold front swept through the area late yesterday morning, and the temperature dropped steadily from the 60s down to the morning low today of 31F. Temperatures are about 15-20 degrees cooler than yesterday. Plenty of clouds and even a few isolated light showers developed this morning and are persisting into the afternoon. A brief, light rain shower provided a trace of precipitation on the summit around 1:30 P.M. EST. The cloud cover is also helping to keep temperatures on the cool side this afternoon. Breezy W winds have picked up this afternoon, gusting at times in the 30-35 mph range. Today’s Observations: 7 A.M. Weather: Scattered altocumulus (3 levels), few cumulus distant NE-ESE and distant SSE-SSW and distant WSW, few moderate cumulus distant S, altocumulus/ altocumulus lenticularis and a few altocumulus castellanus distant S-W-NNE, distant haze, patchy frost Temperature: 32F; Dew Point: 24F; Wind: W at 9 kts. Sea-level pressure: 29.93 ins. Hg, rising then rising more rapidly Visibility: 65 miles, distant haze 6-hr min temp: 31F 24-hr precip: 0.31 inch BHO SA 1155 60 SCT 80 SCT 160 SCT 65 136/32/24/2609/993/ FEW CU DSNT NE-ESE AND DSNT SSE-SSW AND DSNT WSW FEW MDT CU DSNT S AC/ACSL AND FEW ACC DSNT S-W-NNE DSNT HZ PTCHY FROST/ 8/280 53025 MANUAL 70031 ASOS 70030 10037 20031 10 A.M. Weather: Scattered cumulus, scattered altocumulus, broken altocumulus, broken dense cirrus, broken cirrus, cumulus all quadrants, few moderate cumulus distant W-NNW, altocumulus/altocumulus lenticularis all quadrants, higher altocumulus ESE-SSW, patches of dense cirrus and cirrus NE-SE-WSW, partial halo, distant haze Temperature: 41F; Dew Point: 33F; Wind: W at 12G18 kts. Sea-level pressure: 29.92 ins. Hg, rising then falling slightly Visibility: 65 miles BHO SA 1455 25 SCT 90 SCT 160 SCT E220 BKN 250 BKN 65 133/41/33/2712G18/992/ CU ALQDS FEW MDT CU DSNT W-NNW AC/ACSL ALQDS HIER AC ESE-SSW PTCHS DNS CI AND CI NE-SE-WSW PARTIAL HALO DSNT HZ/ 8/242 58003 1 P.M. Weather: Scattered cumulus, broken stratocumulus cumulogenitus (2 levels), cumulus and moderate cumulus all quadrants, numerous rain showers distant WSW-N-ENE moving SE, light distant haze Temperature: 45F; Dew Point: 30F; Wind: W at 16G25 kts, Wind: Peak wind of 29 kts. from the W at 12:42 P.M. EST Wind: Direction variable WSW-NNW Sea-level pressure: 29.88 ins. Hg, falling Visibility: 65 miles, W-NW and NNW-N 45 miles, NW 75 miles 6-hr max temp: 48F BHO SA 1755 35 SCT E45 BKN 60 BKN 65 119/45/30/2816G25/988/ CU AND MDT CU ALQDS NMRS SHRA DSNT WSW-N-ENE MOVG SE LGT DSNT HZ VSBY W-NW AND NNW-N 45 NW 75 PK WND 2829/42 WND 25V34/ 8/400 56014 10048 20032 WEATHER SUMMARY FOR THURSDAY, NOVEMBER 7, 2013 TEMPERATURE (DEGREES F) MAX…..65 NORMAL…..53 MIN…..37 NORMAL…..36 MEAN….51 NORMAL…..45 DEPARTURE FROM 30-YEAR NORMAL………………….+6 TOTAL DEPARTURE FOR THE MONTH…………………+17 [+2.2] DEGREE/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY…………..14 DEPARTURE………-6 TOTAL HEATING UNITS FOR THE MONTH………….125 DEPARTURE……..-12 TOTAL HEATING UNITS FOR THE SEASON…………602 DEPARTURE……..-98 TOTAL HEATING UNITS LAST SEASON TO DATE…….574 DIFFERENCE…….+28 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY………………33 SW AT 9:49 A.M. * AERO…………………..37 SW AT 9:49 A.M. ASOS…………………..37 SW AT 9:49 A.M. DAVIS………………….35 SSW AT 9:47 A.M. RMY 37 FASTEST MILE FOR YESTERDAY………………..27 SW AT 9:39 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE……………..26 SW AT 9:49 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE…………….26 SSW AT 9:47 A.M. AVERAGE WIND SPEED AND DIRECTION…………16.8 WNW ASOS…………………16.6 DAVIS………………..15.2 WSW [240 degrees] * last of several occurrences… PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M….0.31 DEPARTURE………….+0.15 ASOS…………..0.30 TOTAL PRECIPITATION FOR THE MONTH……….0.47 DEPARTURE………….-0.62 ASOS…………..0.46 TOTAL PRECIPITATION FOR THE YEAR……….43.48 DEPARTURE………….-1.38 ASOS…………..N/A** **ASOS malfunctioned during storm on 2/8-9, leading to erroneous totals SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M………0.0 DEPARTURE…………..0.0 TOTAL SNOWFALL FOR THE MONTH………….Trace DEPARTURE………….-0.2 TOTAL SNOWFALL FOR THE SEASON…………Trace DEPARTURE………….-0.5 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2013 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ….: Data not yet available, records not finalized 11/1 68/56/62/+16/0.10/012/02 60 SSW AERO N/A N/A RMY 66 11/2 65/49/57/+11/0.00/296/48 22 WSW AERO N/A N/A RMY 23 11/3 49/30/40/-6/0.06/135/22 23 N AERO N/A N/A RMY N/A 11/4 42/27/35/-10/0.00/588/96 24 NNE AERO N/A N/A RMY 25 11/5 50/29/40/-5/0.00/487/80 16 SSW AERO N/A N/A RMY 17 11/6 59/40/50/+5/0.00/419/69 30 SSW AERO 31 MPH SSW RMY 33 11/7 65/37/51/+6/0.31/079/13 33 SW AERO 37 MPH SW RMY 37 11/8 morning low temp: 31F; the normal low is now 36F DAILY RECORDS FOR NOVEMBER 2013 None so far. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 8 HIGH 72 IN 1938 LOW 20 IN 1921 PRECIP 2.24 INCHES IN 1972 SNOWFALL 4.0 IN 1894 PEAK GUST 72e SE IN 1947 RECORDS FOR NOVEMBER 9 HIGH 72 IN 1975 LOW 17 IN 1971 PRECIP 1.37 INCHES IN 1969 SNOWFALL 0.2 IN 1921,1923 PEAK GUST 73e S IN 1943 TODAY’S REPORT PREPARED BY: Sean Fankhauser