BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SUNDAY, MAY 24, 2015 ALL TIMES ARE IN EASTERN STANDARD TIME DRY CONDITIONS CONTINUE TODAY WITH TEMPERATURES IN THE 80'S The low temperature of 50F this morning got us off to a warmer start than yesterday and clear skies have allowed temperatures to climb quickly this morning. Winds are gusting close to 30 mph this morning and combined with the high temperatures and low humidities to create an elevated risk of brush fires and one fire did start 2-3 miles Northeast of the observatory. Today's Observations: 7 A.M. Weather: Clear, few altocumulus N-NE Temperature: 58F; Dew Point: 36F; Wind: WSW at 09 kts Sea-level pressure: 30.28 ins. Hg, steady Visibility: 70 miles 6-hr Max temp: 58F 6-hr Min temp: 50F 24-hr precip: 0.00 BHO SA 1155 CLR 70 257/58/36/2409/028/ FEW AC N-E LGT DSNT HZ 8/080 50002 10058 20050 10 A.M. Weather: Clear, SKC Temperature: 73F; Dew Point: 37F; Wind: WSW at 10 kts Sea-level pressure: 30.27 ins. Hg, steady then falling BHO SA 1455 CLR 55 252/73/37/2510/027/ SKC HAZY VSBY 35 ESE-SW 8/000 58005 1 P.M. Weather: Clear, few cirrostratus SW-WNW, few Altocumulus NNW-N and overhead forest fire 3 miles NE, thin smoke drifting NE-ESE Temperature: 80F; Dew Point: 39F; Wind: WSW at 14 kts Sea-level pressure: 30.22 ins. Hg, falling slightly Visibility: 50 miles, light distant haze, except NE-E 10 mi smoke 6-Hr Max temp: 80F 6-Hr Min temp: 58F BHO SA 1755 CLR 50 235/80/39/2414/022/ FEW CS SW-WNW FEW AC NNW-N AND OVHD HAZY VSBY 10 NE-E FOREST FIRE 3 MI NE THN K DRFTG NE-ESE 8/085 58017 10080 20058 SUMMARY FOR SATURDAY, MAY 23, 2015 TEMPERATURE (DEGREES F) MAX.....64 NORMAL.....68 MIN.....40 NORMAL.....50 MEAN....52 NORMAL.....59 DEPARTURE FROM 30-YEAR NORMAL........................-7 TOTAL DEPARTURE FOR THE MONTH.......................+91 [+4.1 DEGREES/DAY] HEATING DEGREE DAYS (SEASON JUL TO JUN) TOTAL HEATING UNITS FOR YESTERDAY..............13 DEPARTURE...........+6 TOTAL HEATING UNITS FOR THE MONTH.............130 DEPARTURE..........-92 TOTAL HEATING UNITS FOR THE SEASON...........6401 DEPARTURE.........+145 TOTAL HEATING UNITS LAST SEASON TO DATE......6323 DIFFERENCE.........+78 COOLING DEGREE DAYS (SEASON JAN TO DEC) TOTAL COOLING UNITS FOR YESTERDAY..............0 DEPARTURE..........-1 TOTAL COOLING UNITS FOR THE MONTH.............16 DEPARTURE..........+4 TOTAL COOLING UNITS FOR THE SEASON............16 DEPARTURE..........+2 TOTAL COOLING UNITS LAST SEASON TO DATE.......13 DIFFERENCE.........+3 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY..................28 WNW AT 9:08 A.M. ASOS.......................29 NW AT 1:54 P.M. DAVIS......................29 WNW AT 12:28 P.M. RMY 32 FASTEST MILE FOR YESTERDAY....................21 W AT 11:43 A.M. MAXIMUM 2-MINUTE ASOS AVERAGE.................22 W AT 11:44 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE................20 W AT 11:44 A.M. AVERAGE WIND SPEED AND DIRECTION............. ASOS......................13.5 DAVIS.....................12.2 W [270 deg.] * last of several occurrences.. PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M.....0.00 DEPARTURE.....-0.15 ASOS...............0.00 TOTAL PRECIPITATION FOR THE MONTH...........0.63 DEPARTURE.....-2.27 ASOS...............0.63 TOTAL PRECIPITATION FOR THE YEAR...........18.55 DEPARTURE.....-2.77 ASOS................N/A *** *** ASOS annual totals not available due to erroneous readings SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M...........0.0 DEPARTURE......0.0 TOTAL SNOWFALL FOR THE MONTH.................0.0 DEPARTURE......0.0 TOTAL SNOWFALL FOR THE SEASON..............150.8 DEPARTURE....+88.1 PRELIMINARY CLIMATE SUMMARY FOR MAY CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/RMY GUST RMY: R.M. Young wind gust recording system TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 5/1 52/37/45/-8/0.00/0.0/354/42 21 NE RMY 20 5/2 63/35/49/-4/0.00/0.0/668/79 20 S RMY 20 5/3 74/44/59/+6/0.00/0.0/509/60 22 S RMY 22 5/4 83/47/65/+11/0.00/0.0/783/92 39 SSW RMY 45 5/5 77/56/67/+13/0.03/0.0/222/26 29 SW RMY N/A 5/6 74/54/64/+10/0.00/0.0/574/67 24 SSW RMY 25 5/7 84/52/68/+13/0.00/0.0/824/96 29 S RMY 32 5/8 74/44/59/+4/0.00/0.0/809/94 27 NNE RMY 26 5/9 77/44/61/+6/0.00/0.0/509/59 30 S RMY 32 5/10 88/60/74/+19/0.00/0.0/692/80 28 SSW RMY 30 5/11 84/48/66/+10/0.00/0.0/529/61 30 NE RMY 31 5/12 84/47/66/+10/0.24/0.0/287/33 33 WNW RMY 37 5/13 67/47/57/+1/0.00/0.0/820/94 31 WNW RMY N/A 5/14 70/44/57/+0/0.00/0.0/.../.. 22 NW RMY 22 5/15 73/51/62/+5/0.00/0.0/.../.. 20 WSW RMY 21 5/16 68/53/61/+4/T/0.0/.../.. 23 S RMY 24 5/17 79/50/65/+8/T/0.0/.../.. 21 NE RMY N/A 5/18 62/48/55/-3/..../0.0/.../.. 25 NE RMY N/A 5/19 63/50/57/-1/0.36/0.0/.../.. 24 S RMY 26 5/20 66/46/56/-2/0.00/0.0/.../.. 32 WNW RMY 37 5/21 66/43/55/-4/..../0.0/.../.. 24 S RMY 24 5/22 73/49/61/+2/T/0.0/.../.. 32 NW RMY 36 5/23 64/40/52/-7/0.00/0.0/.../.. 28 WNW RMY 32 5/24 low since midnight is 50F; normal low is now 50F DAILY RECORDS FOR MAY 2015 NONE SO FAR. DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR MAY 24 HIGH 92F IN 1964 LOW 35F IN 1956 PRECIP 2.13 INS IN 1951 PEAK GUST 54 MPH NNE IN 2005 RECORDS FOR MAY 25 HIGH 91F IN 2007 LOW 37F IN 1967 PRECIP 3.73 INS IN 1967 PEAK GUST 83 MPH NE IN 1967 (RECORD FOR MAY) TODAY'S REPORT PREPARED BY: Robert Millette