BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA   DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, JUNE 27, 2007   ALL TIMES ARE IN EASTERN STANDARD TIME   A SECOND DAY OF 90-DEGREE HEAT HITS RECORD OF 93 HIGH HUMIDITY TODAY WITH DEWPOINTS UP TO 70 DEGREES ANOTHER VERY SUNNY DAY WITH CLEAR SKY BUT THICK HAZE   A second day of 90-degree heat brought a high reading of at least 93 degrees early this afternoon equaling a record set in 1999 on this date.  The low temperature of 72 degrees this morning will set new record if it should hold through midnight, the record high minimum for today is 71 degrees in 2003.    RECORD HIGH TEMPERATURES...    June 27th.. 1. 93 in 1999, equaled in 2007 2. 92 in 1941, 1963, 1966  3. 91 in 2003 [latest of several] 4. 90 in 1946, 1900 5. 89 in 2005 [latest of several]    Also for June 27th, the record high minimum temp. is 71 degrees in 2003, and tentatively 72 in 2007.   Today's observations:   7 A.M.   Weather: Partial obscurement with haze, thin scattered cirrus Haze obscuring 1/10 of the sky Temperature: 77F, Dew point: 69F, Wind: SW at 10 kts Sea-level pressure: 30.08 inches Hg, falling Visibility: 4 miles, haze  6-hour min temp. 72F   24-hour precip: 0.00 in. BHO SA 1155 –X 300 –SCT 4H 186/77/69/2310/008/ H1/ 8/001 56003 10077 20072            10 A.M. Weather: Clear, haze  Temperature: 89F, Dew point: 70F, Wind: SSW at 10 kts Sea-level pressure: 30.05 inches Hg, falling Visibility: 5 miles, haze      BHO SA 1455 CLR 5H 178/89/70/2110/005/ 58008   1 P.M. Weather: Scattered cumulus, few moderate Temperature: 92F, Dew point: 69F, Wind: SSW at 15G21 kts Wind: variable S-WSW Sea-level pressure: 30.00 inches Hg, falling Visibility: 8 miles, hazy   6-hour max. temp: 93 deg. BHO SA 1755 60 SCT 8 162/92/69/2115G21/000/ FEW MDT CU HAZY WND 18V24/ 8/200 58016 10093 20077   WEATHER SUMMARY FOR TUESDAY, JUNE 26   TEMPERATURE (DEGREES F) MAX.....92    NORMAL.....78 MIN.....63    NORMAL.....59 MEAN....78    NORMAL.....68 DEPARTURE FROM 30-YEAR NORMAL............+10 TOTAL DEPARTURE FOR THE MONTH............- 6 (-0.4 DEGREES/DAY)   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY............0  DEPARTURE.........-1 TOTAL HEATING UNITS FOR THE MONTH...........80  DEPARTURE........+10   TOTAL HEATING UNITS FOR THE SEASON........5911  DEPARTURE.......-456 TOTAL HEATING UNITS LAST SEASON TO DATE...5791  DIFFERENCE......+120   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............25 SSW AT 8:06 P.M.                        AEROVANE.............25 SSW AT 8:06 P.M.                      ASOS.................N/A  #                    DAVIS................30 SSW AT 8:06 P.M.        FASTEST MILE FOR YESTERDAY..............20 SSW AT 8:06 P.M.   MAXIMUM 2-MINUTE ASOS AVERAGE...........N/A  # MAXIMUM 2-MINUTE DAVIS AVERAGE..........23 SSW AT 8:07 P.M.          AVERAGE WIND SPEED AND DIRECTION........13.3 SSW                        ASOS.................N/A  #                    DAVIS................14.2 SSW [210 deg]    # ASOS WINDS SWITCHED OFF BY NWS 6/6, IT IS NOT KNOWN WHEN THAT DATA WILL RESUME   PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.13                          ASOS..............0.00  TOTAL PRECIPITATION FOR THE MONTH..........2.64  DEPARTURE.....-0.78                          ASOS..............2.60    TOTAL PRECIPITATION FOR THE YEAR..........26.80  DEPARTURE.....+1.64                          ASOS.............26.24      PRELIMINARY CLIMATE SUMMARY FOR JUNE 2007......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   6/1  87/56/72/+10/0.12/660/73       45 NNW  Aero 44 MPH TSTM AM/PM 6/2  87/64/76/+14/0.01/290/32       23 SSE  TSTM PM    6/3  68/50/59/-3/0.14/000/000       24 NNE  TSTM AM (no rain) 6/4  63/50/57/-6/1.52/000/00        35 NE   TSTM 10:15-10:50 A.M. 6/5  78/57/68/+5/0.01/455/50        38 S   6/6  70/49/60/-3/0/637/70           35 W   6/7  69/44/57/-7/0/528/58           23 W 6/8  78/58/68/+4/0/748/82           20 WSW 6/9  63/54/59/-5/0.02/000/00        18 ENE 6/10 70/50/60/-4/0/831/91           22 ENE 6/11 77/62/70/+5/0.04/594/65        29 NE    6/12 70/56/63/-2/0.09/192/21        29 NNE 6/13 56/50/53/-12/0.01/000/00       42 NNE   Aero 40 MPH NNE 6/14 59/49/54/-11/0/036/04          34 NNE   6/15 69/46/58/-8/0/769/84           21 NNE 6/16 80/55/68/+2/0/577/63           25 SW   6/17 85/58/72/+6/T/632/69           31 W   6/18 79/60/70/+4/0/880/96           23 NW 6/19 84/62/73/+6/0/578/63           25 SSW 6/20 74/60/67/0/0.38/147/16         25 W 6/21 77/56/67/0/0.23/823/90         30 WSW  TSTM evening  6/22 71/54/63/-4/0.06/560/61        37 NW   TSTM 1:15-1:30 P.M. 6/23 68/50/59/-9/0/816/89           33 W       6/24 76/52/64/-4/0/807/88           28 W      6/25 86/64/75/+7/0/752/82           31 SSW 6/26 92/63/78/+10/0/806/88          25 SSW   6/27 morning low temp. 72 deg; normal now 59 deg. and      this morning's low beats a record high min. of 71 in 2003.    NEW DAILY RECORDS FOR JUNE 2007:    6/4 - NEW RECORD DAILY RAINFALL OF 1.52 INS; THE PREVIOUS       RECORD WAS 1.29 INS. IN 1898.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR JUNE 27 HIGH 93F IN 1999 LOW 46F IN 1897 PRECIP 1.72 INS IN 1938 PEAK GUST 55e N IN 1945   RECORDS FOR JUNE 28 HIGH 95F IN 1991 LOW 47F IN 1970 PRECIP 2.09 INS IN 1938 PEAK GUST 52 MPH WSW IN 1993   TODAY'S REPORT PREPARED By: Robert Skilling/Eli Melaas