BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY SATURDAY, JUNE 2, 2012 ALL TIMES ARE IN EASTERN STANDARD TIME FOGGY, COOL AND RAINY TODAY...JUST OVER ONE HALF INCH BY EARLY AFTERNOON...MAY FINISHES TIED FOR 6TH WARMEST ON RECORD. JANUARY TO MAY MEAN TEMPERATURE IS WARMEST ON RECORD... Rainfall began just before 6 AM EDT this morning with periods of moderate to heavy rain occurring through the morning. A total of 0.52 inch has been measured for the storm so far through 2 PM EDT. The summmit has been mostly shrouded in fog today, though it is beginning to lift somewhat this afternoon. The peak gust has been 31 mph E at 7:50 AM EDT. The temperature has struggled to reach the low 60s after a morning low of 52 with a steady ESE wind coming in from the ocean. May 2012 tied for the 6th warmest May on record, and this was the 11th consecutive month to average above the current 30-year normal. It was the 16th consecutive month to be warmer than the long-term 120-year average temperature. The mean temperature for the year to date for January through May is the warmest on record by 1.5 degrees F. MAY 2012 PRELIMINARY STATS TEMPERATURE: Average Max Temp: 67.9F [+1.6F] Average Min Temp: 52.5F [+4.7F] Mean Temp: 60.2F [+3.2F] 24-hr. Corr Mean Temp: 59.3F Max Temp: 84F on 26th Min Temp: 42F on 1st, 11th Total heating degree day units (month): 174 [-97] Total cooling degree day units (month): 38 [+17] PRECIPITATION: Total precipitation: 3.63 ins. [-0.48 ins.] Greatest 24-hr precipitation: N/A Total snowfall: 0.0 [-0.1 in.] WIND: Avg wind speed: 9.4 MPH Avg corrected wind speed: 10.0 MPH Prevailing wind direction: S [17%] Peak gust: 40 MPH S on 8th Peak fastest mile: 31 MPH S on 8th SUNSHINE: Total Campbell-Stokes card minutes: 10584; poss. 26226 or 40% Total astronomical minutes: 10985; poss. 27136 or 40% Warmest Mays (deg F), 1885-2012 1) 61.4 in 1991 2) 61.0 in 1944 3) 60.9 in 2010 4) 59.4 in 1911 59.4 in 1959 6) 59.3 in 1964 59.3 in 2012 Warmest Jan-May (deg F), 1885-2012 1) 43.6 in 2012 2) 42.1 in 1998 3) 41.9 in 2010 4) 41.6 in 2002 5) 41.5 in 1991 Longest Number of Consecutive Months Above 30-Year Normal (using NWS mean temperature), and average departure in that time 1) 15 months, Jul 1998 - Sep 1999; +2.7 deg F 2) 14 months, Jan 1931 - Feb 1932; +3.0 deg F 3) 14 months, Nov 1952 - Dec 1953; +2.8 deg F 4) 13 months, Aug 1990 - Aug 1991; +3.0 deg F 5) 11 months, Jan 2010 - Nov 2010; +3.0 deg F 6) 11 months, Jul 2011 - May 2012; +4.4 deg F Longest Number of Consecutive Months Above 120-Year Mean (using corrected mean temperature), and average departure in that time 1) 16 months, Feb 2011 - May 2012; +4.2 deg F 2) 15 months, Jun 1990 - Aug 1991; +3.1 deg F 3) 15 months, Jul 1998 - Sep 1999; +3.0 deg F 4) 13 months, Nov 2009 - Nov 2010; +3.7 deg F Today's observations: 7 A.M. Weather: Light rain and fog, broken stratus and stratus fractus, overcast nimbostratus, few stratocumulus S-SW Temperature: 52F, Dew Point: 52F; Wind: E at 16G27 kts, Wind: Peak wind 27 kts E at 6:50 AM Sea-level pressure: 29.88 inches Hg, falling Visibility: 6 miles, SW-WSW 5 miles, ESE 10 miles 6-hour min. temp: 52F 3-hour precip: 0.19 inch 24-hour precip: 0.19 inch BHO SA 1155 E12 BKN 20 OVC 6R-F 120/52/52/1016G27/988/ FEW SC S-SW VSBY SW-WSW 5 ESE 10 PK WND 1027/50/ 8/72/ 58007 6019/ 70019 10054 20052 10 A.M. Weather: Sky obscured in light drizzle and fog, stratus drifting over summit Temperature: 56F, Dew Point: 56F; Wind: E at 13 kts, Sea-level pressure: 29.84 inches Hg, falling Visibility: 1/8 mile 3-hour precip: 0.33 inch BHO SA 1455 W2 X 1/8L-F 104/56/56/1013/984/ L-B35R-E40 STRA DRFTG OVR SMT/ 8//// 55016 6033/ 1 P.M. Weather: Partial obscuration in light rain, light drizzle and fog, stratus drifting over summit Temperature: 60F, Dew Point: 60F; Wind: ESE at 13 kts, Wind: Direction variable E-SE Sea-level pressure: 29.79 inches Hg, falling Visibility: 1/4 mile, variable 1/8 to 3/4 mile 6-hour max. temp: 60F 6-hour precip: 0.39 inch BHO SA 1755 –X E4 OVC 1/4VR-L-F 087/60/60/1113/979/ F5 VSBY 1/8V3/4 STRA DRFTG OVR SMT WND 08V14/ 8/6// 58017 6039/ 10060 20052 WEATHER SUMMARY FOR FRIDAY, JUNE 1 TEMPERATURE (DEGREES F) MAX.....67 NORMAL.....71 MIN.....53 NORMAL.....53 MEAN....60 NORMAL.....62 DEPARTURE FROM 30-YEAR NORMAL.......................-2 TOTAL DEPARTURE FOR THE MONTH.......................-2 [-2.0 DEGREES/DAY] HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY...............5 DEPARTURE...........0 TOTAL HEATING UNITS FOR THE MONTH.............179 DEPARTURE...........0 TOTAL HEATING UNITS FOR THE SEASON...........4893 DEPARTURE.......-1409 TOTAL HEATING UNITS LAST SEASON TO DATE......6153 DIFFERENCE......-1260 PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY.............28 ENE AT 7:51 A.M. * AERO..................28 ENE AT 7:25 A.M. ASOS..................30 ENE AT 7:23 A.M. DAVIS.................26 ENE AT 7:22 A.M. RMY 29 THE FASTEST MILE FOR YESTERDAY.......... 18 NE AT 8:56 A.M. * MAXIMUM 2-MINUTE ASOS AVERAGE............18 E AT 9:40 A.M. MAXIMUM 2-MINUTE DAVIS AVERAGE...........18 ENE AT 7:40 A.M. AVERAGE WIND SPEED AND DIRECTION.......11.9 ENE ASOS................11.0 DAVIS...............10.2 ENE [65 deg.] * Last of several occurrences.... PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.19 DEPARTURE...........+0.02 ASOS..............0.19 TOTAL PRECIPITATION FOR THE MONTH..........0.19 DEPARTURE..........+0.02 ASOS..............0.19 TOTAL PRECIPITATION FOR THE YEAR..........13.43 DEPARTURE..........-9.40 ASOS.............13.44 PRELIMINARY CLIMATE SUMMARY FOR MAY 2012 CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOW/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane wind recording system gust when significant RMY: RMY = R.M. Young wind gust recording system added 8/9/2011 TSTM: Thunderstorm day (thunder heard some time during day) ....: Data not yet available, records not finalized 5/1 47/42/45/-8/0.65/0.0/000/00 33 SE AERO 36 MPH SE RMY 37 5/2 50/43/47/-6/0.05/0.0/000/00 16 ENE AERO 16 MPH ENE RMY 17 5/3 51/44/48/-5/0.08/0.0/000/00 14 SSE AERO 16 MPH SSE RMY N/A 5/4 56/47/52/-2/0.01/0.0/000/00 21 SSW AERO 25 MPH SSW RMY 23 5/5 57/46/52/-2/0.04/0.0/034/04 14 NE AERO 15 MPH NE RMY 15 5/6 58/45/52/-2/0.00/0.0/532/62 21 ENE AERO 21 MPH ENE RMY 21 5/7 67/48/58/+3/0.00/0.0/740/86 23 S AERO 25 MPH S RMY 25 5/8 57/48/53/-2/0.18/0.0/000/00 40 S AERO 46 MPH S RMY 46 5/9 61/54/58/+3/0.36/0.0/000/00 25 S AERO 28 MPH S RMY N/A 5/10 65/46/56/+1/0.98/0.0/234/27 33 W AERO 36 MPH W RMY 37 5/11 62/42/52/-4/T/0.0/539/62 30 WNW AERO 33 MPH WNW RMY 34 5/12 77/46/62/+6/0.00/0.0/862/99 30 W AERO 30 MPH W RMY 29 5/13 82/57/70/+14/0.00/0.0/314/36 27 S AERO 29 MPH S RMY 29 5/14 71/52/62/+5/0.05/0.0/096/11 23 S AERO 24 MPH S RMY 23 5/15 72/57/65/+8/0.43/0.0/123/14 32 S AERO 35 MPH S RMY 33 5/16 71/58/65/+8/0.12/0.0/141/16 23 S AERO 24 MPH S RMY N/A TSTM 5/17 69/50/60/+3/0.00/0.0/784/89 31 WNW AERO 32 MPH WNW RMY 26 5/18 69/49/59/+1/0.00/0.0/857/97 17 ESE AERO 17 MPH ESE RMY 17 5/19 74/51/63/+5/0.00/0.0/876/99 15 WNW AERO 15 MPH WNW RMY 16 5/20 79/56/68/+10/0.00/0.0/727/82 17 SE AERO 17 MPH SE RMY 17 5/21 64/52/58/-1/0.02/0.0/009/01 17 NE AERO 16 MPH NNE RMY 18 5/22 61/56/59/0/0.54/0.0/000/00 23 NE AERO 23 MPH NE RMY 23 5/23 75/57/66/+7/0.00/0.0/366/41 15 S AERO 16 MPH S RMY 15 5/24 75/59/67/+8/0.00/0.0/751/84 20 SSE AERO 21 MPH SE RMY 21 5/25 73/57/65/+5/0/01/0.0/054/06 26 S AERO 25 MPS S RMY 25 5/26 84/63/74/+14/0.00/0.0/350/39 24 SSW AERO 24 MPH SW RMY 23 5/27 75/62/69/+9/0.00/0.0/817/91 27 NNE AERO 24 MPH S RMY 24 5/28 72/58/65/+4/0.00/0.0/585/65 22 S AERO 21 MPH S RMY 20 5/29 78/59/69/+8/0.11/0.0/360/40 24 N AERO 24 MPH N RMY 25 TSTM 5/30 73/62/68/+7/T/0.0/009/01 22 WSW AERO 23 MPH WSW RMY 25 5/31 80/63/72/+11/0.00/0.0/823/91 23 WNW AERO 23 MPH W RMY 24 6/1 67/53/60/-2/0.00/.../.. 28 ENE AERO 28 MPH ENE RMY 29 6/2 morning low temp: 52F; the normal low is now 53F DAILY RECORDS FOR MAY 2012 5/16 - TIED DAILY RECORD HIGH MINIMUM TEMP OF 58F; ties the record of 58F in 1951 and 1961. DAILY RECORDS FOR JUNE 2012 None so far DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated): RECORDS FOR JUNE 2 HIGH 91F IN 1895 LOW 41F IN 1907, 1929 PRECIP 2.36 INS IN 1982 SNOWFALL TRACE IN 1907 (IP) PEAK GUST 63 MPH NW IN 2000 RECORDS FOR JUNE 3 HIGH 98F IN 1919 LOW 38F IN 1929 PRECIP 2.40 INS 2006 PEAK GUST 47 MPH NW IN 1998 TODAY'S REPORT PREPARED BY: Mike Iacono/Jeb Postle