BLUE HILL METEOROLOGICAL OBSERVATORY
MILTON, MASSACHUSETTS 02186
ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA
  
DAILY DISCUSSION AND CLIMATE SUMMARY
FRIDAY, MAY 2, 2008  
ALL TIMES ARE IN EASTERN STANDARD TIME UNLESS NOTED
 
Today's observations:
 
8 A.M. EDT
Weather: Overcast, light rain
Temperature: 45F, Dew point: 44F,  Wind: SE at 2 kts  
Sea-level pressure: 30.16 inches Hg, falling
Visibility: 5 miles, variable 2-8 miles, fog
6-hour min temp: 44F 
6-hour precip: 0.03 in.
24-hour precip: 0.03 in.
BHO SA 1155 E40 OVC 5VR-F 213/45/44/E1302/016/ 
FEW LWR STRA VSBY 2V8 PCPN VRY LGT/ 8/72/ 53009 
MANUAL 6003/ ASOS 60003 MANUAL 70003 ASOS 70003 10045 20044
 
11 A.M. EDT
Weather: Overcast, light rain 
Temperature: 47F, Dew point: 46F,  Wind: ENE at 6 kts
Sea-level pressure: 30.15 inches Hg, falling
Visibility: 6 miles, variable 5-8 miles, fog
3-hour precip: trace
BHO SA 1455 E40 OVC 6VR-F 211/47/46/0706/015/ FEW LWR STRA 
VSBY 5V8 PCPN VRY LGT/ 8/72/ 58002 MANUAL 6000/
 
2 P.M. EDT
Weather: Overcast
Temperature: 48F, Dew point: 46F,  Wind: ENE at 8 kts
Sea-level pressure: 30.14 inches Hg, falling
Visibility: 3 miles, fog
6-hour max. temp: 48F
6-hour precip: trace
BHO SA 1755 E10 OVC 3F 205/48/46/0608/014/ 
8/7// 58006 MANUAL 6000/ 10048 20045
 
WEATHER SUMMARY FOR THURSDAY, MAY 1
 
TEMPERATURE (DEGREES F)
MAX.....60    NORMAL.....62
MIN.....35    NORMAL.....42
MEAN....48    NORMAL.....52
DEPARTURE FROM 30-YEAR NORMAL............-4  
TOTAL DEPARTURE FOR THE MONTH............-4 [-4.5 DEGREES/DAY]
 
HEATING DEGREE DAYS
TOTAL HEATING UNITS FOR YESTERDAY............17  DEPARTURE........+4
TOTAL HEATING UNITS FOR THE MONTH............17  DEPARTURE........+4  
TOTAL HEATING UNITS FOR THE SEASON.........5628  DEPARTURE......-411  
TOTAL HEATING UNITS LAST SEASON TO DATE....5625  DIFFERENCE.......+3
 
PEAK GUST AND AVERAGE WIND SPEED (MPH)
PEAK WIND GUST FOR YESTERDAY............30 W   AT 11:43 A.M. 
                   AEROVANE.............28 W   AT 11:43 A.M. 
                   ASOS.................28 W   AT 11:43 A.M.  
                   DAVIS................30 W   AT 11:43 A.M. 
FASTEST MILE FOR YESTERDAY..............16 W   AT  3:12 P.M. *   
MAXIMUM 2-MINUTE ASOS AVERAGE...........17 WNW AT  3:13 P.M.   
MAXIMUM 2-MINUTE DAVIS AVERAGE..........19 W   AT  3:13 P.M.   
                   AVERAGE.............9.0 W 
                   ASOS................8.7        
                   DAVIS...............9.4 W [264 deg]   
* last of several occurrences.
 
PRECIPITATION (INCHES) THROUGH THIS MORNING (EST)
TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.03   DEPARTURE......-0.10  
                         ASOS..............0.03
TOTAL PRECIPITATION FOR THE MONTH..........0.03   DEPARTURE......-0.10
                         ASOS..............0.03
TOTAL PRECIPITATION FOR THE YEAR..........20.79   DEPARTURE......+2.71
                         ASOS.............23.26 #
# Includes erroneous ASOS precipitation data on 2/13/08.
 
SNOWFALL (INCHES) THROUGH THIS MORNING (EST)
TOTAL SNOWFALL 24 HRS ENDING 7 A.M.........0.0    DEPARTURE......-0.1
TOTAL SNOWFALL FOR THE MONTH...............0.0    DEPARTURE......-0.1
TOTAL SNOWFALL FOR THE SEASON.............66.5    DEPARTURE......+6.4 **
** corrected error of 0.1 in snowfall departure for the season; this 
error was introduced in late March or early April
 
PRELIMINARY CLIMATE SUMMARY FOR APRIL 2008 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, records not finalized
 
4/1  59/50/55/+14/0.20/0/000/00    54 S    Aero 58 MPH SSW
4/2  47/31/39/-3/0/0/745/97        52 W    Aero 51 MPH W
4/3  52/27/40/-2/0/0/648/84        37 SSW 
4/4  43/34/39/-3/0.71/0/000/00     35 E
4/5  51/37/44/+1/0.06/0/093/12     21 W
4/6  40/36/38/-5/0.09/0/000/00     36 NE 
4/7  39/34/37/-6/0/0/172/22        35 NE    Aero 36 MPH NE
4/8  47/30/39/-5/0/0/627/80        22 NE
4/9  59/33/47/+3/0/0/150/19        29 S    
4/10 71/44/58/+14/T/0/624/79       34 W
4/11 54/40/47/+2/0.03/096/13       24 SE 
4/12 70/43/57/+12/0.43/0/342/43    40 WNW   Aero 42 WNW
4/13 47/34/41/-4/T/0/104/13        30 NW 
4/14 53/30/42/-4/0/0/625/78        29 NW  
4/15 57/33/45/-1/0/0/803/100       23 SSE 
4/16 64/39/52/+6/0/0/806/100       24 SSE
4/17 64/14/53/+6/0/0/810/100       23 NE
4/18 70/42/56/+9/0/0/723/89        23 NW
4/19 70/46/58/+11/0/0/799/98       22 NE 
4/20 67/42/55/+7/0/0/760/93        25 ESE
4/21 61/41/51/+3/0/0/615/75        17 E
4/22 74/45/60/+11/0/0/789/96       23 S
4/23 83/50/67/+18/0/0/784/95       25 SW 
4/24 72/53/63/+14/0/0/802/97       38 WNW   Aero 39 WNW   
4/25 71/46/59/+9/0/0/557/67        25 E
4/26 55/42/49/-1/T/0/716/86        27 ENE 
4/27 49/40/45/-5/0.02/0/000/00     16 ESE 
4/28 57/39/48/-3/0.67/0/008/01     39 SE    Aero 39 SE
4/29 60/39/50/-1/0.95/0/008/01     44 WNW   Aero 44 WNW
4/30 54/35/45/-7/0/0/700/83        29 WSW
 
PRELIMINARY CLIMATE SUMMARY FOR MAY 2008 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, records not finalized
 
5/1  60/35/48/-4/0/0/.../..        30 W    Aero 28 W
 
5/2 morning low temp. 44F; our normal low is now 43F
 
NEW DAILY RECORDS FOR MAY 2008
None to date.
 
DAILY EXTREMES
Temperature and precipitation records back to 1885, and
wind records back to 1940 (e = estimated):
 
RECORDS FOR MAY 2
HIGH 92F IN 2001
LOW 29F IN 1903
PRECIP 1.36 INCHES IN 2006
SNOWFALL 1.0 INS IN 1888
PEAK GUST 58 MPH S IN 1983
 
RECORDS FOR MAY 3
HIGH 92F IN 2001
LOW 31F IN 1888
PRECIP 2.25 INS IN 1900
SNOWFALL TRACE IN 1908, 1985
PEAK GUST 71 MPH W IN 2002
 
TODAY'S REPORT PREPARED By: Stephanie Radner