BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, MARCH 24, 2007 ALL TIMES ARE IN EASTERN STANDARD TIME Today's observations: 7 A.M. Weather: Clear Temperature: 40F, Dew point: 26F, Wind: NE at 6 kt Sea-level pressure: 30.37 inches Hg, rising Visibility: 50 miles 6-hour min. temp. 36F 24-hour precipitation: trace BHO SA 1155 CLR 50 286/40/26/0506/037/ FEW AC DSNT ESE-SW FEW PTCHS THN GF E-SSE HAZY WND LGT/ 8/001 51017 10040 20036 10 A.M. Weather: Scattered cumulus Temperature: 45F, Dew point: 27F, Wind: ESE at 6 kt Sea-level pressure: 30.39 inches Hg, rising Visibility: 50 miles BHO SA 1455 60 SCT 50 293/45/27/1106/039/ FEW CI DSNT S-W HAZY WND LGT AND VRB/ 8/101 50007 1 P.M. Weather: Thin broken cirrus Temperature: 48F, Dew point: 27F, Wind: NE at 9 kt Sea-level pressure: 30.34 inches Hg, falling Visibility: 50 miles BHO SA 1755 SCT 200 –BKN 250 50 276/48/27/0609/034/ FEW SML CU VCNTY STN HAZY/ 8/101 58017 WEATHER SUMMARY FOR FRIDAY, MARCH 23 TEMPERATURE (DEGREES F) MAX.....57 NORMAL.....47 MIN.....41 NORMAL.....30 MEAN....49 NORMAL.....38 DEPARTURE FROM 30-YEAR NORMAL..........+11 TOTAL DEPARTURE FOR THE MONTH..........-40 (-1.9 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........16 DEPARTURE.......-11 TOTAL HEATING UNITS FOR THE MONTH.........729 DEPARTURE.......+36 TOTAL HEATING UNITS FOR THE SEASON.......4820 DEPARTURE......-443 TOTAL HEATING UNITS LAST SEASON TO DATE..4792 DIFFERENCE......+28 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............35 W AT 11:04 A.M. AEROVANE.............36 SSW AT 1:18 A.M. ASOS.................33 SSW AT 1:20 A.M. DAVIS................40 S AT 12:03 A.M. FASTEST MILE FOR YESTERDAY..............26 SSW AT 1:37 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE...........25 SSW AT 1:43 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE..........31 SSW AT 1:21 A.M. AVERAGE WIND SPEED AND DIRECTION........16.1 W ASOS................15.7 DAVIS...............17.4 WSW [248 deg] PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M...trace DEPARTURE.....-0.16 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........5.42 DEPARTURE.....+1.72 ASOS..............5.41 TOTAL PRECIPITATION FOR THE YEAR..........11.14 DEPARTURE.....-1.40 ASOS.............11.04 SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0 DEPARTURE......-0.3 TOTAL SNOWFALL FOR THE MONTH................9.9 DEPARTURE......+0.4 TOTAL SNOWFALL FOR THE SEASON..............23.8 DEPARTURE.....-31.1 PRELIMINARY CLIMATE SUMMARY FOR MARCH 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 3/1 40/22/31/-1/0/0/512/76 24 NW Aero 23 MPH NW 3/2 49/28/39/+7/1.74/0.4/000/00 48 E Aero 45 MPH E 3/3 58/33/46/+14/0/0/489/72 44 WNW Aero 43 MPH WNW 3/4 40/26/33/0/0/0/471/69 37 W 3/5 37/19/28/-5/T/T/198/29 58 W Aero 57 MPH W 3/6 19/3/11/-22/0/0/667/97 * 57 W Aero 61 MPH W 3/7 22/2/12/-21/0/0/504/73 28 SW 3/8 25/5/15/-19/T/T/471/68 51 WNW Aero 54 MPH WNW 3/9 34/1/18/-16/0/0/668/96 * 25 S 3/10 49/22/36/+2/0/0/322/46 39 S Aero 39 MPH S 3/11 51/33/42/+7/0.26/0/513/73 32 W 3/12 55/31/43/+8/0/0/423/60 24 SSW 3/13 60/36/48/+13/0/0/319/45 35 S Aero 33 MPH S 3/14 66/42/54/+18/0/0/405/57 36 S 3/15 54/35/45/+9/0.07/0/000/00 36 NW 3/16 35/24/30/-6/1.65/8.5/000/00 55 NE Aero 53 MPH NE 3/17 34/24/29/-6/1.52/0/000/00 51 NNE Aero 50 MPH NE 3/18 31/20/26/-11/0/0/258/37 43 W Aero 42 MPH W 3/19 40/22/31/-6/0.18/1.0/442/61 38 S Aero 37 MPH S 3/20 42/21/32/-6/0/0/677/93 46 WSW Aero 47 MPH W 3/21 36/16/26/-12/0/0/702/96 33 S 3/22 52/31/42/+4/T/0/132/18 47 S Aero 50 MPH S 3/23 57/41/49/+11/T/0/.../.. 35 W 3/24 morning low temp. 36 degrees; normal low now 30 * Record low maximum temperature of 19 on the 6th surpasses previous 21 set in 1916. * Record low minimum temperature of 3 on the 6th ties previous 3 set in 1948. * Record low minimum temperature of 1 on the 9th breaks previous 5 set in 1885, 1943, and 1996. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MARCH 24 HIGH 70 IN 1920 LOW 6 IN 1906 PRECIP 1.51 INS. IN 1956 SNOWFALL 12.3 INS. IN 1956 PEAK GUST 71 MPH W IN 1968 RECORDS FOR MARCH 25 HIGH 76 IN 1910 LOW 8 IN 1888, 1956 PRECIP 1.84 INS. IN 1909 SNOWFALL 1.0 INS. IN 1912 PEAK GUST 69 MPH SE IN 1969 TODAY'S REPORT By: Mike Iacono If you do not wish to receive this Daily Discussion and Climate Summary from the Blue Hill Observatory, please send an email to sitemaster@bluehill.org.