BLUE HILL METEOROLOGICAL OBSERVATORY MILTON, MASSACHUSETTS 02186 ELEVATION 635 FEET, 10 MILES SSW OF BOSTON, MA DAILY DISCUSSION AND CLIMATE SUMMARY WEDNESDAY, MARCH 28, 2007  ALL TIMES ARE IN EASTERN STANDARD TIME GUSTY WNW WINDS TO 30 TO 40 MPH HAVE COMBINED WITH VERY LOW RELATIVE HUMIDITY NEAR 20% SO A RED FLAG WARNING WAS ISSUED FOR HIGH FIRE DANGER SPECTACULAR VISIBILITY UP TO 90 MILES TODAY   Very gusty and dry WNW winds with relative humidities near 20% have prompted the National Weather Service to issue a high fire danger red flag warning today.  The peak gusts have been in the 30 to 35 MPH range with a few gusts nearing 40 MPH.  High temperatures have reached the mid-50's with dewpoints in the mid-teens. Visibility is spectacular today running up to 90 miles and possibly higher.    Today's observations: 7 A.M.   Weather: Thin broken cirrus Temperature: 45F, Dew point: 33F, Wind: WNW at 16G24 kts Wind: Peak wind WNW at 29 kts @ 24 past the hour Sea-level pressure: 30.13 inches Hg, rising Visibility: 75 miles 6-hour min. temp. 45F BHO SA 1155 250 –SCT 300 –BKN 75 202/45/33/3016G24/013/ FEW SC NE-E AND S-W PK WND 3029/24/ 8/501 53029 10048 20045   10 A.M.   Weather: Thin scattered cirrus Temperature: 50F, Dew point: 14F, Wind: WNW at 16G25 kts Wind: Variable direction W to NNW Sea-level pressure: 30.15 inches Hg, steady Visibility: 90 miles BHO SA 1455 300 –SCT 90 209/50/14/3016G25/015/ FEW LWR CI DSNT SE-SW WND 26V34/ 8/001 51007   1 P.M.   Weather: Clear, cirrus distant S-SW Temperature: 54F, Dew point: 14F, Wind: WNW at 18G26 kts Sea-level pressure:  30.13 inches Hg, falling  Visibility: 80 miles  Six hourly max. temp: 54  BHO SA 1755 CLR 80 203/54/14/2918G26/013/ CI DSNT S-SW PK WND 3029/29/ 8/001 56005 10054 20045   WEATHER SUMMARY FOR TUESDAY, MARCH 27 TEMPERATURE (DEGREES F) MAX.....61    NORMAL.....48 MIN.....41    NORMAL.....31 MEAN....51    NORMAL.....40 DEPARTURE FROM 30-YEAR NORMAL..........+11 TOTAL DEPARTURE FOR THE MONTH..........-26 (-1.2 DEGREES/DAY)   HEATING DEGREE DAYS TOTAL HEATING UNITS FOR YESTERDAY..........14   DEPARTURE........-11 TOTAL HEATING UNITS FOR THE MONTH.........818   DEPARTURE........+22 TOTAL HEATING UNITS FOR THE SEASON.......4909   DEPARTURE.......-457 TOTAL HEATING UNITS LAST SEASON TO DATE..4890   DIFFERENCE.......+19   PEAK GUST AND AVERAGE WIND SPEED (MPH) PEAK WIND GUST FOR YESTERDAY............24 WNW  AT 11:07 P.M.                            AEROVANE............ 22 WNW  AT 11:07 P.M.                           ASOS.................23 NW   AT 11:07 P.M.                            DAVIS................N/A          FASTEST MILE FOR YESTERDAY..............17 WNW  AT 11:08 P.M.    MAXIMUM 2-MINUTE ASOS AVERAGE...........17 WNW  AT 11:11 P.M.      MAXIMUM 2-MINUTE DAVIS AVERAGE..........N/A     AVERAGE WIND SPEED AND DIRECTION...... 9.6 WNW                     ASOS...............9.8                         DAVIS..............9.7 W [280 deg]  PRECIPITATION (INCHES) THROUGH THIS MORNING (EST) TOTAL PRECIPITATION 24 HRS ENDING 7 A.M....0.00  DEPARTURE.....-0.16                          ASOS..............0.00 TOTAL PRECIPITATION FOR THE MONTH..........6.02  DEPARTURE.....+1.68                           ASOS..............6.01    TOTAL PRECIPITATION FOR THE YEAR..........11.74  DEPARTURE.....-1.44                          ASOS.............11.64    SNOWFALL (INCHES) THROUGH THIS MORNING (EST) TOTAL SNOWFALL 24 HRS ENDING 7 A.M..........0.0  DEPARTURE......-0.3 TOTAL SNOWFALL FOR THE MONTH...............13.5  DEPARTURE......+2.8  TOTAL SNOWFALL FOR THE SEASON..............27.4  DEPARTURE.....-28.7       PRELIMINARY CLIMATE SUMMARY FOR MARCH 2007......CALENDAR DAY DATA DATA REPORTED: DATE: MAX/MIN/MEAN/DEP/PRECIP/SNOWFALL/SUN(MIN.)/SUN(%)/ PEAK GUST/AERO GUST AERO: Aerovane recording wind system when significant TSTM: Thunderstorm day ....: Data not yet available 3/1  40/22/31/-1/0/0/512/76          24 NW   Aero 23 MPH NW 3/2  49/28/39/+7/1.74/0.4/000/00     48 E    Aero 45 MPH E 3/3  58/33/46/+14/0/0/489/72         44 WNW  Aero 43 MPH WNW 3/4  40/26/33/0/0/0/471/69           37 W 3/5  37/19/28/-5/T/T/198/29          58 W    Aero 57 MPH W 3/6  19/3/11/-22/0/0/667/97 *        57 W    Aero 61 MPH W 3/7  22/2/12/-21/0/0/504/73          28 SW    3/8  25/5/15/-19/T/T/471/68          51 WNW  Aero 54 MPH WNW 3/9  34/1/18/-16/0/0/668/96 *        25 S     3/10 49/22/36/+2/0/0/322/46          39 S    Aero 39 MPH S 3/11 51/33/42/+7/0.26/0/513/73       32 W 3/12 55/31/43/+8/0/0/423/60          24 SSW 3/13 60/36/48/+13/0/0/312/44 **      35 S    Aero 33 MPH S 3/14 66/42/54/+18/0/0/412/57 **      36 S 3/15 54/35/45/+9/0.07/0/000/00       36 NW 3/16 35/24/30/-6/1.65/8.5/000/00     55 NE   Aero 53 MPH NE 3/17 34/24/29/-6/1.52/T/000/00       51 NNE  Aero 50 MPH NE 3/18 31/20/26/-11/0/0/318/44 **      43 W    Aero 42 MPH W 3/19 40/22/31/-6/0.18/1.0/435/60     38 S    Aero 37 MPH S 3/20 42/21/32/-6/0/0/677/93          46 WSW  Aero 47 MPH W 3/21 36/16/26/-12/0/0/702/96         33 S 3/22 52/31/42/+4/T/0/132/18          47 S    Aero 50 MPH S 3/23 57/41/49/+11/T/0/258/35         35 W 3/24 50/31/41/+2/0.40/3.5/585/79     28 E    Aero 23 MPH E 3/25 45/32/39/0/0.01/0.1/126/17      16 WSW 3/26 45/34/40/+1/0.17/0/026/03 **    37 S 3/27 61/41/51/+11/0.02/0/239/32 ** Corrected sunshine minutes and percentages 3/28 morning low temp. 45 deg; normal now 31 deg.       * Record low maximum temperature of 19 on the 6th surpasses previous 21 set   in 1916. * Record low minimum temperature of 3 on the 6th ties previous 3 set in 1948. * Record low minimum temperature of 1 on the 9th breaks previous 5 set in   1885, 1943, and 1996.   DAILY EXTREMES Temperature and precipitation records back to 1885, and wind records back to 1940 (e = estimated):   RECORDS FOR MARCH 28 HIGH 86 IN 1998 LOW 7 IN 1923 PRECIP 2.31 INS. IN 1932 SNOWFALL 3.0 INS. IN 1932 PEAK GUST 60e MPH NW IN 1944, 60 WSW IN 1991   RECORDS FOR MARCH 29 HIGH 85 IN 1945 LOW -2 IN 1923 PRECIP 2.78 INS. IN 1984 SNOWFALL 13.5 INS. IN 1984 PEAK GUST 95 MPH ENE IN 1984   TODAY'S REPORT By: Robert Skilling/Stephanie Radner