From: Robert Skilling To: Charlie Orloff (BHO) Cc: ; bOB Lautzenheiser ; Subject: BLUEHILL MA 241300 BKN 15 37/21/N08/2991F/LO 24 Date: Wednesday, January 24, 2001 1:06 PM BLUE HILL METEOROLOGICAL OBSERVATORY, MILTON, MASSACHUSETTS 02186 ELEVATION 635 FT. ABOVE MSL....10 MILES SSW OF BOSTON, MA WEDNESDAY JANUARY 24 2001 PLEASE VISIT OUR WEB SITE AT: http://www.bluehill.org/ DAILY DISCUSSION....1 P.M. 1/24/2001 THIRD MORNING IN A ROW WITH STEEP TEMPERATURE INVERSION... Here are the low temperatures for the past three morning at Blue Hill Observatory and Norwood Airport (3 miles to our SW). On Monday, the low here was 14 degrees, while Norwood had -1 degree. The next two mornings have 20 at Blue Hill and +1 at Norwood and this morning 24 atop Blue Hill while Norwood had +4 degrees. A NARROW TEMPERATURE RANGE FOR JANUARY... A look at the month reveals some interesting stats so far. Our minimum temperature for the month is 9 degrees (not at all cold for January). In fact, the highest January minimum in the past 30 years is 12 degrees recorded in 1990. If it does not get colder by month's end then we'll have the seconds highest monthly for January in the past 30 years. On the other hand, our maximum for the month is just 41 degrees. Every year during the decade of the 1990's had January monthly maxima reaching at least 50 degrees! Three years had maximums in the 60's. The lowest January maximum temperature since 1970 is 42 degrees recorded in 1985. The month of January is averaging about 1 degree warmer than normal to date with a total departure of +27 degrees for 23 days. Precipitation totals 2.53 inches and is a half inch below normal. Snowfall for the month has totaled 19.6 inches and is running ahead of the monthly norm. The normal snowfall total for all of January is 15.4 inches. We report 13 inches of total snowcover this morning at the snow stake in the enclosure and this is very representative of snow depth here at the summit of the hill. TODAY'S MANUAL OBSERVATIONS... 7 A.M. 1/24/2001 WED BHO SA 1155 250 -OVC 10 136/24/20/3313/993/ BINOVC SE FEW AC LWR CI SE THN F ALQDS INVSN PRSNT/ 8/047/ 4/013 55003 10026 20024 10 A.M. BHO SA 1455 300 -SCT 9 147/29/22/3310/996/ HAZY/ 8/001/ 51011 1 P.M. BHO SA 1755 E35 BKN 15 130/37/21/3507/991/ BKN V OVC HAZY ALQDS VSBY WNW 20 WND 32V03/ 8/500/ 58017 10038 20024 Robert Skilling