BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY THURSDAY, MAY 13, 2004 ALL TIMES ARE IN EASTERN DAYLIGHT TIME [unless otherwise noted] HIGH TEMPERATURE YESTERDAY, MAY 12 WAS 87 DEGREES... JUST ONE DEGREE SHORT OF THE RECORD OF 88 DEGREES FOR THE DATE SET IN 2001.... The temperature hit a maximum of 87.4 degrees yesterday in the Hazen shelter at 4:17 p.m. was the highest reading of the year to date. It beat Tuesday's maximum of 86.2 degrees by over one degree. The May temperature average continues to increase farther above normal and the month is now 5.3 degrees WARMER than normal. Today's observations: 5/13/2004 THU 8 a.m. low overcast with break north thru east and visibility 25 miles; 50 deg; dewpoint 40; wind northeast 18 gusting 30 mph; six hour minimum temp. 50 deg... BHO SA 1155 E10 OVC 25 259/50/40/0416G26/029/ BINOVC/LINE OF CLRG XTDNG N-E FEW THN SPTS IOVC LGT HZ ALQDS VSBY SE-SW 15 N-NE 30 VSBY INCRSNG PST HR PK WND 0526/50/ WND 35V07/ 8/5// 51035 10070 20050 11 a.m. clear with 25 miles visibility and hazy; temp. 56; wind northeast at 16 gusting to 25 mph... BHO SA 1455 CLR 25 268/56/41/0414G22/032/ FEW SC DSNT NE-ESE HAZY WND 01V08/ 8/500 51009 2 p.m. clear with 20 miles visibility but 12 ne-se with thn fog and stratus layer along/offshore/ hazy all directions but 20 miles visibility to southwest through northwest and 54 deg; dewpoint 42; wind northeast at 15 gusting 27 mph; six hourly maximum temp. 57 deg. BHO SA 1755 CLR 20 267/54/42/0513G23/032/ STRA LYR ALG/OFFSHR NE-SE FEW CI NW-N VSBY NE-SE 12 THN F HAZY ALQDS WND 01V08/ 8/601 58001 10057 20050 WEATHER SUMMARY FOR TUESDAY, MAY 11: TEMPERATURE (DEGREES F) MAX.....87 NORMAL.....66 HAZEN.....87.4 @ 4:17 p.m. MIN.....58 NORMAL.....46 HAZEN.....58.1 @ 5:53 a.m. MEAN....73 NORMAL.....56 DEPARTURE FROM 30-YEAR NORMAL.....+17 TOTAL DEPARTURE FOR THE MONTH.....+66 (+5.3 DEGREES/DAY) HEATING DEGREE DAYS TOTAL HEATING DEGREE DAYS FOR YESTERDAY....... 0 DEPARTURE....- 10 TOTAL HEATING DEGREE DAYS FOR THE MONTH.......82 DEPARTURE....- 56 [corrected] TOTAL HEATING DEGREE DAYS FOR THE SEASON....6075 DEPARTURE....- 89 TOTAL HEATING DEGREE DAYS FOR LAST SEASON...6580 DIFFERENCE...- 505 PEAK GUST AND AVERAGE WIND SPEED (MPH)(ALL TIMES LOCAL DAYLIGHT TIME) PEAK WIND GUST FOR YESTERDAY........24 W AT 4:12 p.m. AEROVANE.........26 W AT 4:12 p.m. ASOS.............22 W AT 4:22 p.m. FASTEST MILE FOR YESTERDAY..........N/A MAXIMUM 2-MINUTE ASOS AVERAGE.......16 SSW AT 8:40 p.m. AVERAGE WIND SPEED AND DIRECTION... N/A ASOS..............8.6 PRECIPITATION (INCHES) THROUGH THIS MORNING (EDT) TOTAL PRECIPITATION 24 HRS ENDING 8 A.M....0.00E DEPARTURE....-0.12 ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........1.41 DEPARTURE....-0.08 [corrected] ASOS..............1.38 TOTAL PRECIPITATION FOR THE YEAR..........18.76 DEPARTURE....-0.68 [corrected] ASOS.............17.18 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/SNOW/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/.../.. 28 MPH SSW 5/7 84/48/66/+12/0.04/.../.. 40 MPH W Aerovane 41 MPH W 5/8 63/41/52/ -2/ 0/.../.. 28 MPH S 5/9 55/44/50/-5/0.33/.../.. 30 MPH SW 5/10 70/49/60/+5/0/.../.. 29 MPH S 5/11 86/53/70/+15/T/.../.. 27 MPH WNW 5/12 87/58/73/+17/0/.../.. 24 MPH W 5/13 morning high temp. 72; morning low 50 DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 13 HIGH 85F IN 1947 LOW 35F IN 1914 PRECIP 2.05 INCHES IN 1975 PEAK GUST 49 MPH NNW IN 1965 RECORDS FOR MAY 14 HIGH 85F IN 1961 LOW 33F IN 1895 PRECIP 0.92 INCHES IN 1931 PEAK GUST 50e MPH SW IN 1976 TODAY'S REPORT BY: Robert Skilling