BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, NOVEMBER 29, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME MOSTLY SUNNY TODAY WITH AVERAGE NOVEMBER TEMPERATURES... LIGHT RAIN SHOWERS ON FRIDAY INCLUDED A TRACE OF HAIL... A total of 0.07 inch fell in rain showers on Friday at mid-day. These showers were convective in nature, and a trace of small hailstones from 1/8 to 1/4 inch in diameter were observed from 12:40 to 12:42 PM. This coincided with a significant wind shift from SE to W at 12:35 PM and the peak wind gust for the day of 35 MPH W at 12:40 PM. A nearly clear sky this morning is filling with cumulus at early afternoon, but the high and low temperatures so far of 44 and 30 are close to the normal temperatures for this date. Today's observations: 7 A.M. Weather: Clear, few altocumulus distant WNW-NNW, hazy Temperature: 31F, Dew point: 25F, Wind: SW at 11 kts Sea-level pressure: 29.86 inches Hg, rising Visibility: 25 miles, hazy 24-hour precipitation: 0.07 inch 6-hour minimum temperature: 30F BHO SA 1155 CLR 25 111/31/25/2411/986/ FEW AC DSNT WNW-NNW HAZY/ 8/030 53014 70007 10033 20030 10 A.M. Weather: Clear, altocumulus distant W-WNW, cumulus distant WNW-N and E Temperature: 38 F, Dew point: 26F, Wind: W at 7 kt Sea-level pressure: 29.92 inches Hg, rising Visibility: 45 miles BHO SA 1455 CLR 45 127/38/26/2807/991/ AC DSNT W-WNW CU DSNT WNW-N FEW CU DSNT E WND LGT/ 8/130 51016 1 P.M. Weather: Broken stratocumulus Temperature: 43F, Dew point: 23F, Wind: W at 11 kts Sea-level pressure: 29.88 inches Hg, falling Visibility: 70 miles 6-hour maximum temperature: 43F BHO SA 1755 E45 BKN 70 117/43/23/2811/988/ 8/5// 56010 10043 20031 WEATHER SUMMARY FOR FRIDAY, NOVEMBER 28 TEMPERATURE (DEGREES F) MAX.....43 NORMAL.....45 MIN.....31 NORMAL.....30 MEAN....37 NORMAL.....37 DEPARTURE FROM 30-YEAR NORMAL................0 TOTAL DEPARTURE FOR THE MONTH..............-11 [-0.6 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............28 DEPARTURE..........0 TOTAL HEATING UNITS FOR THE MONTH...........651 DEPARTURE.........+9 TOTAL HEATING UNITS FOR THE SEASON.........1193 DEPARTURE........-40 TOTAL HEATING UNITS LAST SEASON TO DATE....1026 DIFFERENCE......+167 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............35 W AT 12:40 P.M. AEROVANE.............32 W AT 12:40 P.M. ASOS.................33 W AT 12:40 P.M. DAVIS................33 WSW AT 12:40 P.M. FASTEST MILE FOR YESTERDAY..............24 W AT 12:40 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........23 W AT 12:41 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........24 W AT 12:41 P.M. AVERAGE............13.2 W ASOS...............12.5 DAVIS..............13.4 SSW [195 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.07 DEPARTURE.......-0.08 ASOS...............0.07 TOTAL PRECIPITATION FOR THE MONTH...........4.47 DEPARTURE.......+0.13 ASOS...............4.62 TOTAL PRECIPITATION FOR THE YEAR...........49.41 DEPARTURE.......+3.05 ASOS..............52.14 # # Includes erroneous ASOS precipitation data on 2/13/08. SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.....-0.1 TOTAL SNOWFALL FOR THE MONTH..............TRACE DEPARTURE.....-2.5 TOTAL SNOWFALL FOR THE SEASON.............TRACE DEPARTURE.....-2.7 PRELIMINARY CLIMATE SUMMARY FOR NOVEMBER 2008 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system gust when significant TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 11/1 58/36/47/0/0.00/266/43 22 SW 11/2 43/29/36/-10/0.00/598/97 25 NW 11/3 50/32/41/-5/0.00/000/00 23 S 11/4 65/45/55/+9/0.00/409/67 24 SSW 11/5 65/52/59/+14/0.07/018/03 28 NE 11/6 55/52/54/+9/0.93/000/00 35 NNE 11/7 57/52/55/+10/0.05/000/00 24 N 11/8 59/55/57/+13/0.07/000/00 32 SE 11/9 57/45/51/+7/0.01/462/77 35 WSW 11/10 52/34/43/-1/T/316/53 32 W 11/11 47/31/39/-4/0.00/428/72 33 W 11/12 46/35/41/-2/0.00/355/60 17 W 11/13 49/36/43/0/0.05/T/000/00 35 ESE SLEET 8 AM 11/14 59/49/54/+12/0.07/0/000/00 22 SE 11/15 67/56/62/+20/0.62/0/000/00 65 SSE Aero 69 MPH SSE 11/16 64/37/51/+9/0.32/0/169/29 53 W Aero 46 MPH W 11/17 47/31/39/-2/0.00/0/0/501/86 24 SSW 11/18 38/23/31/-10/0.00/0.0/580/100 33 NW 11/19 31/18/25/-16/0.00/0.0/566/98 32 NW 11/20 33/17/25/-15/0.00/0.0/547/95 32 W Aero 29 MPH W 11/21 32/19/26/-14/0.00/0.0/551/96 36 NW Aero 33 MPH NW 11/22 26/17/22/-18/0.00/0.0/515/90 47 WNW Aero 47 MPH WNW 11/23 31/18/25/-14/0.00/0.0/.../.. 35 W Aero 33 MPH W 11/24 41/25/33/-6/0.00/0.0/.../.. 32 E 11/25 51/35/43/+4/2.21/0.0/000/00 44 E 11/26 44/30/37/-1/0.00/0.0/.../.. 32 S 11/27 44/32/38/0/0.00/0.0/.../.. 20 WSW 11/28 43/31/37/0/0.07/0.0/.../.. 35 W Aero 33 W Hail 1/4 inch 11/29 morning low temp. 30F; our normal low is now 30F NEW DAILY RECORDS FOR NOVEMBER 2008... 11/15 PEAK GUST: 65 SSE, PREVIOUS RECORD, 58 NNW in 1962, NW in 1967 11/15 HIGH MIN TEMP: 56F; TIED WITH 1989 11/22 LOW MAX TEMP: 26F; TIED WITH 1972 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR NOVEMBER 29 HIGH 64 IN 1963, 1990 LOW 6 IN 1901 PRECIP 2.69 INCHES IN 1963 SNOWFALL 5.0 INS IN 1995 PEAK GUST 86 SSE IN 1963 RECORDS FOR NOVEMBER 30 HIGH 67 IN 2006 LOW 7 IN 1887, 1929 PRECIP 2.42 INCHES IN 1944 SNOWFALL 10.2 INS IN 1945 PEAK GUST 90 SSW IN 1963 TODAY'S REPORT PREPARED By: Mike Iacono