BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, FEBRUARY 14, 2004 ALL TIMES ARE IN EASTERN STANDARD TIME SUNNY AND WARM WEATHER TODAY TO BE REPLACED BY ARCTIC AIR TONIGHT... After a high temperature of 38 on Friday, the high so far today has climbed to nearly 40 by 1 PM. Much colder air will arrive tonight following the passage of an arctic cold front. February precipitation has now fallen below normal with just 1.71 inches through Friday, though the month continues to average warmer than normal by more than 2 degrees. Precipitation for the year is now more than three inches below normal. Today's observations: 7 A.M. Weather: Thin scattered cirrus, hazy; Visibility: 20 miles Temperature: 29F, Dewpoint: 18F, Wind: SW 14 mph, Sea-level pressure: 29.79 inches, rising BHO SA 1155 250 -SCT 20 088/29/18/2312/979/ HAZY FEW LWR CI E/ 8/001 53010 10032 20028 10 A.M. Weather: Thin scattered cirrus, hazy; Visibility: 25 miles Temperature: 35F, Dew Point: 18F, Wind: WSW 16 mph, gusting to 25 mph BHO SA 1455 250 -SCT 25 091/35/18/2414G22/980/ WND 21V27 PK WND 2526/13/ 8/001 51003 1 P.M. Weather: Thin cirrus overcast with scattered lower cirrus, hazy Temperature: 39F, Dew Point: 18F, Wind: W 17 mph, gusting to 27 mph Sea-Level pressure: 29.76 inches, falling BHO SA 1755 200 SCT 250 -OVC 25 077/39/18/2615G23/976/ HAZY WND 23V29 PK WND 2627/28/ 8/001 56014 10039 20029 WEATHER SUMMARY FOR FRIDAY, FEBRUARY 13: TEMPERATURE (DEGREES F) MAX.....38 NORMAL.....36 ASOS.....38 AT 3:05 PM MIN.....26 NORMAL.....20 ASOS.....26 AT 7:32 AM MEAN....32 NORMAL.....28 DEPARTURE FROM 30-YEAR NORMAL......+4 TOTAL DEPARTURE FOR THE MONTH.....+28 (+2.0 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......33 DEPARTURE.....-4 TOTAL HEATING DEGREE DAYS FOR THE MONTH......468 DEPARTURE....-31 TOTAL HEATING DEGREE DAYS FOR THE SEASON....4071 DEPARTURE....+36 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...4261 DIFFERENCE..-190 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY........37 W AT 11:02 A.M. AEROVANE.........37 W AT 11:02 A.M. ASOS.............32 WSW AT 2:33 P.M. FASTEST MILE FOR YESTERDAY..........27 W AT 2:32 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE.......26 W AT 2:34 P.M. AVERAGE WIND SPEED AND DIRECTION..16.3 SW ASOS...........16.4 PRECIPITATION (INCHES) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00 DEPARTURE....-0.14 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.71 DEPARTURE....-0.18 ASOS..............1.56 TOTAL PRECIPITATION FOR THE YEAR...........3.43 DEPARTURE....-3.24 ASOS..............2.96 SNOWFALL (INCHES) TOTAL SNOWFALL FOR 24 HRS ENDING 7 A.M......0.0 DEPARTURE....-0.5 TOTAL SNOWFALL FOR THE MONTH................2.5 DEPARTURE....-4.0 TOTAL SNOWFALL FOR THE SEASON..............41.2 DEPARTURE....+5.6 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY, 2004......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 2/1 31/09/20/-06/ 0/ 0/599/100 33 NW Aerovane 38 MPH NW 2/2 37/18/28/+02/ 0/ 0/578/96 21 NNW 2/3 42/25/34/+08/0.51/0.2/000/00 47 SSE Aerovane 49 MPH SSE 2/4 42/24/33/+07/ T/ 0/564/93 46 W Aerovane 47 MPH W 2/5 34/21/28/+01/ 0/ 0/451/74 33 WNW 2/6 33/24/29/+02/1.08/2.3/000/00 28 SSE 2/7 39/24/32/+05/0.12/ T/092/15 37 WNW 2/8 24/12/18/-09/ 0/ 0/616/100 59 WNW Aerovane 62 MPH WNW 2/9 41/20/31/+04/ 0/ 0/279/45 47 SSW Aerovane 48 MPH SSW 2/10 44/32/38/+11/ 0/ 0/546/88 31 WSW 2/11 35/21/28/+01/ 0/ 0/618/99 46 W Aerovane 46 MPH W 2/12 35/16/26/-02/ 0/ 0/.../.. 25 SW 2/13 38/26/32/+04/ 0/ 0/.../.. 37 W 2/14 morning low 28 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR FEBRUARY 14 HIGH 56F IN 1949 LOW -08F IN 1979 PRECIP 1.95 INCHES IN 1940 SNOWFALL 11.0 INCHES IN 1914 PEAK GUST 83 MPH SSW IN 2000 RECORDS FOR FEBRUARY 15 HIGH 60F IN 1954 LOW -18F IN 1943 PRECIP 1.28 INCHES IN 1950 SNOWFALL 11.2 INCHES IN 1940 PEAK GUST 94e MPH WNW IN 1946 TODAY'S REPORT BY: Mike Iacono