BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, MAY 27, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] Today's observations: 8 a.m. obscurement with fog and visibility 1/16 mile in dense fog and very light drizzle, temp. and dewpoint 52 deg; wind nnw at 09 mph; six hour minimum temp. 48; 24 hour precipitation 0.32 inch... BHO SA 1155 W2 X 1/16L-F 086/50/50/3408/978/ PCPN VRY LGT INTMT/ 8//// 53012 ASOS 60028 MANUAL 6028/ ASOS 70031 MANUAL 70032 10050 20047 BHO SA 1455 E5 OVC 9 086/55/53/3206/978/ THN F ALQDS/ 8/6// 51000 6000/ BHO SA 1755 15 SCT 300 SCT 20 079/65/54/0606/976/ HAZY WND L/V/ 8/501 56006 6000/ 10065 20050 WEATHER SUMMARY FOR WEDNESDAY, MAY 26: TEMPERATURE (DEGREES F) MAX.....54 NORMAL.....70 HAZEN.....53.8 @ 5:... p.m. MIN.....43 NORMAL.....50 HAZEN.....43.0 @ MEAN....49 NORMAL.....60 DEPARTURE FROM 30-YEAR NORMAL.....- 11 TOTAL DEPARTURE FOR THE MONTH.....+ 72 (+2.8 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY.......16 DEPARTURE....+ 7 TOTAL HEATING DEGREE DAYS FOR THE MONTH......179 DEPARTURE....- 76 TOTAL HEATING DEGREE DAYS FOR THE SEASON....6172 DEPARTURE....- 98 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6766 DIFFERENCE...- 594 PEAK GUST AND AVERAGE WIND SPEED (MPH)(ALL TIMES LOCAL DAYLIGHT TIME) PEAK WIND GUST FOR YESTERDAY........23 E AT 1:56 a.m. AEROVANE.........24 E AT 1:56 a.m. ASOS.............22 E AT 1:56 a.m. DAVIS............19 ESE AT 1:59 a.m. FASTEST MILE FOR YESTERDAY...........16 E AT 1:56 a.m. MAXIMUM 2-MINUTE ASOS AVERAGE........18 E AT 1:56 a.m. AVERAGE WIND SPEED AND DIRECTION... 5.3 MPH E (uncorrected av.) ASOS.............. 5.0 MPH DAVIS............. 4.9 MPH E (96 deg.) PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.32 DEPARTURE....+0.20 ASOS..............0.31 TOTAL PRECIPITATION FOR THE MONTH..........2.83 DEPARTURE....-0.58 ASOS..............2.80 TOTAL PRECIPITATION FOR THE YEAR..........20.18 DEPARTURE....-1.18 ASOS.............18.60 2003-2004 SNOWFALL (INCHES) TOTAL SNOWFALL FOR THE SEASON..............58.0 DEPARTURE....+1.7 PRELIMINARY CLIMATE SUMMARY FOR MAY 2004......CALENDAR DAY DATA DATA REPORTED: DATE MAX/MIN/MEAN/DEP/PRECIP/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 5/1 78/50/64/+12/0/769/91 39 MPH SSW 5/2 72/56/64/+12/0.06/127/15 45 MPH S Aerovane 49 MPH S 5/3 61/47/54/+1/0.66/000/00 35 MPH S 5/4 58/39/49/-4/0.32/725/85 40 MPH WNW Aerovane 46 MPH WNW 5/5 65/38/52/-1/T/453/53 37 MPH S 5/6 70/45/58/+4/0/711/83 28 MPH SSW 5/7 84/48/66/+12/0.04/730/85 40 MPH W Aerovane 41 MPH W 5/8 63/41/52/-2/0/621/72 28 MPH S 5/9 55/44/50/-5/0.33/043/05 30 MPH SW 5/10 70/49/60/+5/0/632/73 29 MPH S 5/11 86/53/70/+15/T/573/66 27 MPH WNW 5/12 87/58/73/+17/0/513/59 24 MPH W 5/13 72/43/58/+2/T/610/70 31 MPH NE 5/14 77/45/61/+4/T/533/61 26 MPH S 5/15 88/58/73/+16/0/745/85 35 MPH WSW 5/16 68/49/59/+2/0.08/009/01 30 MPH ENE 5/17 69/49/59/+2/0/415/47 25 MPH S 5/18 71/51/61/+3/0.42/132/15 33 MPH SSW Aerovane 37 MPH SSW 5/19 69/54/62/+4/0.02/318/36 25 MPH NNW 5/20 75/50/63/+5/0/709/80 29 MPH SSW 5/21 77/51/65/+6/T/497/56 29 MPH S 5/22 62/46/54/-5/T/000/00 21 MPH NNW 5/23 68/46/57/-2/0.24/196/22 27 MPH NW TSTM 5/24 58/46/52/-8/0.32/134/15 37 MPH WNW TSTM 5/25 50/45/48/-12/T/000/00 24 MPH NE TSTM 5/26 54/43/49/-11/0.01/000/00 23 MPH E 5/27 morning low temp. 48; rainfall 0.32 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 27 HIGH 92F IN 1914 LOW 36F IN 1915 PRECIP 1.40 INS IN 1898 PEAK GUST 55 S IN 1956 RECORDS FOR MAY 28 HIGH 90F IN 1929 LOW 39F IN 1917 PRECIP 2.48 INS 1906 PEAK GUST 51e MPH NE IN 1946 TODAY'S REPORT BY: Robert Skilling