BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, FEBRUARY 15, 2009 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Clear with a few cirrus Temperature: 23F, Dew point: 11F, Wind: WNW at 15G20 kt Sea-level pressure: 29.91 inches Hg, rising Visibility: 80 miles 6-hour minimum temperature: 23F Snow depth on ground: Trace BHO SA 1155 CLR 80 129/23/11/2915G20/991/ FEW CI E-SW/ 8/001 51017 10028 20023 10 A.M. Weather: Clear with a few cirrus Temperature: 30F, Dew point: 13F, Wind: WNW at 16G32 kt Sea-level pressure: 29.95 inches Hg, rising Visibility: 80 miles BHO SA 1455 CLR 80 142/30/13/3016G32/995/ FEW CI SE-SW AND NE/ 8/001 51013 1 P.M. Weather: Clear with a few cirrus and stratocumulus Temperature: 37F, Dew point: 16F, Wind: WNW at 13G19 kt Sea-level pressure: 29.96 inches Hg, steady Visibility: 80 miles 6-hour maximum temperature: 37F BHO SA 1755 CLR 80 146/37/16/2913G19/996/ FEW SC FRMG S AND W AND NE FEW THN CI S/ 8/001 50004 10037 20023 WEATHER SUMMARY FOR SATURDAY, FEBRUARY 14 TEMPERATURE (DEGREES F) MAX.....39 NORMAL.....36 MIN.....20 NORMAL.....20 MEAN....30 NORMAL.....28 DEPARTURE FROM 30-YEAR NORMAL.................+2 TOTAL DEPARTURE FOR THE MONTH................+43 [+2.8 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY.............35 DEPARTURE.........-2 TOTAL HEATING UNITS FOR THE MONTH............490 DEPARTURE........-46 TOTAL HEATING UNITS FOR THE SEASON..........4058 DEPARTURE........-14 TOTAL HEATING UNITS LAST SEASON TO DATE.....3699 DIFFERENCE......+359 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............42 W AT 1:19 P.M. AEROVANE.............40 W AT 1:30 P.M. ASOS.................40 W AT 1:31 P.M. DAVIS................38 W AT 1:19 P.M. FASTEST MILE FOR YESTERDAY..............32 W AT 1:25 P.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........30 WNW AT 1:20 P.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........29 W AT 1:20 P.M. AVERAGE............18.2 W ASOS...............17.2 DAVIS..............16.6 W [267 DEGREES] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00 DEPARTURE.........-0.14 ASOS...............0.00 TOTAL PRECIPITATION FOR THE MONTH...........0.62 DEPARTURE.........-1.41 ASOS...............0.62 TOTAL PRECIPITATION FOR THE YEAR............4.78 DEPARTURE.........-2.03 ASOS...............5.82 # # Includes erroneous ASOS precipitation data on 1/1/09 and 1/2/09 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE.........-0.6 TOTAL SNOWFALL FOR THE MONTH................6.5 DEPARTURE.........-2.4 TOTAL SNOWFALL FOR THE SEASON..............61.6 DEPARTURE........+23.3 PRELIMINARY CLIMATE SUMMARY FOR FEBRUARY 2009 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 2/1 45/15/30/+4/0/0/402/67 35 SW 2/2 50/32/41/+15/0/0/568/94 29 NNW 2/3 33/22/28/+2/0.44/5.6/000/00 39 N AERO 38 MPH N 2/4 24/10/17/-9/0.05/0.9/572/94 37 WNW 2/5 17/3/10/-17/0/0/538/88 33 W 2/6 26/4/15/-12/0/0/509/83 26 W 2/7 42/16/29/+2/0/0/314/51 45 S AERO 44 MPH S 2/8 49/30/40/+13/0/0/433/70 54 W AERO 54 MPH W 2/9 37/21/29/+2/0/0/621/100 38 WNW AERO 38 MPH WNW 2/10 36/22/29/+2/0/0/.../.. 21 SSE 2/11 59/34/47/+20/0/0/.../.. 29 SSE AERO 24 MPH SSE 2/12 51/37/44/+16/0.13/0/.../.. 54 WSW 2/13 38/24/31/+3/0/.../.. 47 W AERO 47 MPH W 2/14 39/20/30/+2/0/0/.../.. 42 W AERO 40 MPH W NEW DAILY RECORDS FOR FEBRUARY 2009... None to date DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): 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 RECORDS FOR FEBRUARY 16 HIGH 62F IN 1954 LOW -16F IN 1943 PRECIP 1.91 INCHES IN 1958 SNOWFALL 18.6 INCHES IN 1958 PEAK GUST 78 MPH W IN 1967 TODAY'S REPORT PREPARED By: Andrew Hoell