BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, FEBRUARY 7, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME HIGH CLOUDS CLEARED AWAY RAPIDLY THIS MORNING REINFORCEMENT OF ARCTIC AIR TODAY GUSTY WEST WINDS OF OVER 40 MPH EARLY AFTERNOON An early morning high overcast cleared away very quickly by 9 a.m. this morning and a sunny sky is dotted with cumulus clouds early this afternoon. Temperatures are runing a few degrees colder than yesterday with a morning low of 8 degrees as compared to 10 degrees early yesterday. Early afternoon high temperatures have reached only the low 20's and dew- points have dropped to the single numbers below zero. Early this afternoon west winds have suddenly increased and gusted past 40 MPH with a peak gust of 47 MPH W on the Aerovane at 1:10 P.M. Today's observations: 7 A.M. Weather: Overcast middle and high clouds, thin spots overhead Temperature: 9F, Dew point: -4F, Wind: W AT 11 kts Sea-level pressure: 29.86 inches Hg, falling Visibility: 45 miles, light haze Snow on ground: trace 6-hourly min. temp. 8 deg. BHO SA 1155 E100 BKN 250 OVC 45 112/9/-4/2611/986/ FEW SC OFFSHR DSNT NE-ESE OVC PTLY THN OVHD BINOVC/CLRG LINE ALG HRZN W-NNN MOON DMLY VSB PST HR LGT HZ/ 8/517 56012 10010 20008 10 A.M. Weather: Clear, few clouds offshore Temperature: 14F, Dew point: -3F, Wind: W at 10 kts Sea-level pressure: 29.85 inches Hg, falling Visibility: 50 miles BHO SA 1455 CLR 50 108/14/-3/2710/985/ FEW SC/CUFRMG TOPS DSNT NE-ESE OFFSHR CI LYR DSNT E-SE WND 24V30/ 8/508 58004 1 P.M. Weather: Scattered cumulus clouds Temperature: 20F, Dew point: -4F, Wind: W at 23G31 kts Wind: Peak wind W 31 kts at 55 mins. past the hour Sea-level pressure: 29.78 inches Hg, falling Visibility: 65 miles, 70 NW 6-hour max. temp. 21 deg. BHO SA 1755 60 SCT 65 084/20/-4/2723G31/978/ PTCHS VIRGA W VSBY NW 70 PK WND 2831/55/ WND 24V31/ 8/100 58024 10021 20009 WEATHER SUMMARY FOR TUESDAY, FEBRUARY 6 TEMPERATURE (DEGREES F) MAX.....24 NORMAL.....35 MIN.....10 NORMAL.....19 MEAN....17 NORMAL.....27 DEPARTURE FROM 30-YEAR NORMAL.........-10 TOTAL DEPARTURE FOR THE MONTH.........-28 (-4.9 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........48 DEPARTURE.......+ 9 TOTAL HEATING UNITS FOR THE MONTH.........260 DEPARTURE.......+26 TOTAL HEATING UNITS FOR THE SEASON.......3204 DEPARTURE......-566 TOTAL HEATING UNITS LAST SEASON TO DATE..3244 DIFFERENCE.....- 40 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............38 W AT 1:08 P.M. AEROVANE.............42 W AT 1:08 P.M. ASOS.................33 W AT 1:09 P.M. DAVIS................36 WSW AT 6:04 A.M. FASTEST MILE FOR YESTERDAY..............27 W AT 12:52 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........26 W AT 12:52 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........28 W AT 5:58 A.M. AVERAGE WIND SPEED AND DIRECTION......17.4 W ASOS..............17.3 W DAVIS.............17.9 W [260 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE.....-0.15 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........0.23 DEPARTURE.....-0.67 ASOS..............0.22 TOTAL PRECIPITATION FOR THE YEAR...........3.17 DEPARTURE.....-2.49 ASOS..............3.09 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE......-0.7 TOTAL SNOWFALL FOR THE MONTH................0.7 DEPARTURE......-3.2 TOTAL SNOWFALL FOR THE SEASON...............7.3 DEPARTURE.....-26.0 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 2/1 35/20/28/+2/0/0/126/21 37 S Aero 34 MPH S 2/2 35/28/32/+6/0.18/0.3/000/00 20 NW 2/3 32/19/26/0/0.05/0.4/574/95 39 W 2/4 22/10/16/-10/0/0/601/99 39 WSW Aero 40 MPH WSW 2/5 16/5/11/-16/0/0/493/81 61 W Aero 59 MPH W 2/6 24/10/17/-10/0/0/593/97 38 W Aero 42 MPH W 2/7 morning low temp. 08 deg; normal now 19 deg. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 7 HIGH 51F IN 1951,1953 LOW -8F IN 1910 PRECIP 2.12 INS. IN 1983 SNOWFALL 17.1 INS. IN 1978 [BLIZZARD OF 1978] PEAK GUST 87e MPH SSE IN 1951 RECORDS FOR FEBRUARY 8 HIGH 60F IN 1933 LOW -9F IN 1934 PRECIP 2.50 INS. IN 1945 SNOWFALL 11.0 INS. IN 1891 PEAK GUST 63e MPH NE IN 1945 TODAY'S REPORT By: Robert Skilling