BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, OCTOBER 29, 2008 ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED A NOVEMBER-LIKE CHILL TODAY WITH GUSTY SW WINDS AND MOSTLY CLOUDY SKIES A cold southwest wind gusting up to 30 to 35 MPH is combining with high temperatures in the low 40's early this afternoon to bring a November- like chill to the day under mostly cloudy skies. The day is more typical of late November when normal high temperatures are in the low 40's. Today's normal maximum temperature is in the middle 50's. Yesterday's rainfall totaled 0.43 inch while the peak gust reached 42 MPH SSE during the afternoon. The lowest barometric of close to 29.17 inches was reached early last evening. Winds diminished from the south- southeast before gradually veering to southwest. Light winds under 10 MPH occurred at the time of the lowest pressure around 8:30 P.M. EDT during the gradual wind shift. Winds increased and were gusting past 30 MPH at mid-evening from the southwest. Today's observations: 8 A.M. EDT Weather: Thin scattered high cirrus clouds, stratocumulus southwest thru northwest, altocumulus and some lenticularis all parts of the sky Temperature: 36F, Dew point: 28F, Wind: SSW at 15 kts, Wind: Peak wind 31 kts WSW at 6:57 a.m. EDT, direction variable S-WSW, gradually backing past hour Sea-level pressure: 29.55 inches Hg, rising Visibility: 50 miles, 40 miles SW-NW 6-hourly minimum temperature: 36F 24-hourly precipitation: 0.43 inch BHO SA 1155 250 –SCT 300 –SCT 50 008/36/28/2115/955/ SC SW-NW AND DSNT NE-S AC/ACSL ALQDS VSBY SW-NW 40 PK WND 2431/57/ WND GRDLY BACKING WND 18V24/ 8/541 51022 MANUAL 70043 ASOS 70043 10038 20036 11 A.M. EDT Weather: Overcast stratocumulus, breaks to the distant SE-S Temperature: 40F, Dew point: 24F, Wind: WSW at 18G26 kts, Wind: Peak gust 26 kts WSW at 10:48 a.m. EDT, variability SSW-W Sea-level pressure: 29.61 inches Hg, rising Visibility: 70 miles 3-hourly precip: 0.00 inch BHO SA 1455 E40 OVC 70 028/40/24/2418G26/961/ BINOVC DSNT SE-S PK WND 2426/48/ WND 20V27/ 8/5// 51020 2 P.M. EDT Weather: Overcast stratocumulus, breaks in overcast Temperature: 43F, Dew point: 22F, Wind: SW at 17G26 kts, Wind: Peak gust 31 kts WSW at 1:37 p.m. EDT, direction variability SSW-W Sea-level pressure: 29.62 inches Hg, rising Visibility: 70 miles 6-hourly maximum temperature: 43F 6-hourly precip: 0.00 inch BHO SA 1755 E55 OVC 70 030/43/22/2317G26/962/ BINOVC PK WND 2531/37/ WND 20V27/ 8/5// 53002 10043 20036 WEATHER SUMMARY FOR TUESDAY, OCTOBER 28 TEMPERATURE (DEGREES F) MAX.....51 NORMAL.....56 MIN.....36 NORMAL.....39 MEAN....44 NORMAL.....48 DEPARTURE FROM 30-YEAR NORMAL..............-4 TOTAL DEPARTURE FOR THE MONTH.............+10 [+0.2 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............21 DEPARTURE........+4 TOTAL HEATING UNITS FOR THE MONTH...........351 DEPARTURE.......-17 TOTAL HEATING UNITS FOR THE SEASON..........467 DEPARTURE.......-70 TOTAL HEATING UNITS LAST SEASON TO DATE.....294 DIFFERENCE.....+173 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............42 SSE AT 3:37 P.M. * AEROVANE.............42 SSE AT 3:37 P.M. * ASOS.................43 SSE AT 3:43 P.M. DAVIS................46 SE AT 3:40 P.M. FASTEST MILE FOR YESTERDAY..............31 SSE AT 3:36 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........31 SSE AT 3:37 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........34 SSE AT 3:37 P.M. AVERAGE............15.4 SSE ASOS...............14.4 DAVIS..............14.1 ESE [120 deg] * last of several occurrences... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M... 0.43 DEPARTURE.......+0.28 ASOS..............0.43 TOTAL PRECIPITATION FOR THE MONTH..........2.04 DEPARTURE.......-1.93 ASOS..............2.04 TOTAL PRECIPITATION FOR THE YEAR..........44.94 DEPARTURE.......+3.37 ASOS.............47.52 # # Includes erroneous ASOS precipitation data on 2/13/08. PRELIMINARY CLIMATE SUMMARY FOR OCTOBER 2008 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/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 10/1 68/58/63/+6/0.49/120/17 38 SW TSTM # 10/2 62/46/54/-2/0.11/455/65 45 W 10/3 62/45/54/-2/T/376/54 44 SSW Aero 43 MPH SSW 10/4 61/40/51/-5/0.00/612/88 32 WSW 10/5 53/45/49/-6/T/000/00 18 WNW 10/6 58/39/49/-6/0.00/303/44 28 WNW 10/7 64/37/51/-4/0.00/687/100 23 WNW 10/8 69/43/56/+2/0.00/581/85 32 S Aero 30 MPH S 10/9 72/55/64/+10/0.02/510/75 33 WSW 10/10 69/53/61/+7/0.00/664/98 29 W 10/11 68/49/59/+6/0.00/668/99 20 NNW 10/12 67/47/57/+4/0.00/625/93 21 W 10/13 62/50/56/+4/0.00/308/46 20 NE 10/14 65/50/58/+6/0.00/514/77 30 SSE 10/15 64/52/58/+6/0.00/618/93 21 ENE 10/16 67/51/59/+8/T/026/04 35 NW 10/17 59/42/51/0/0.00/474/72 26 NW 10/18 51/37/44/-7/0.00/440/67 25 N 10/19 46/36/41/-10/0.00/176/27 36 NNE Aero 36 MPH NNE 10/20 54/34/44/-6/0.00/631/97 25 N 10/21 59/43/51/+1/0.01/129/20 20 W 10/22 44/38/41/-9/0.10/000/00 32 NNW 10/23 45/31/38/-11/0.00/520/81 23 N 10/24 62/34/48/-1/0.00/589/92 22 WSW 10/25 66/44/55/+6/0.28/038/06 60 SSE Aero 61 MPH SSE TSTM 10/26 64/48/56/+8/0.60/.../.. 55 SSE Aero 60 MPH SSE 10/27 66/47/57/+9/0.00/.../.. 21 NNE 10/28 51/36/44/-4/0.43/.../.. 42 SSE 10/29 morning low temp. 36F; normal low temp. 39F # Thunderstorm gust NEW DAILY RECORDS FOR OCTOBER None... DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR OCTOBER 29 HIGH 74 IN 1989 LOW 23 IN 1891 PRECIP 2.27 INCHES IN 1953 SNOWFALL 1.5 INCHES IN 2005 PEAK GUST 69 S IN 2003 RECORDS FOR OCTOBER 30 HIGH 75 IN 1946,1989 LOW 21 IN 1928 PRECIP 1.85 INCHES IN 1917 SNOWFALL 0.6 INCHES IN 2000 PEAK GUST 66 NW IN 1963 TODAY'S REPORT PREPARED By: Robert Skilling