780
FNUS71 KBOX 171718
FWSBOX

Spot Forecast for Outdoor Community Event...Somerville OEM
National Weather Service Boston/Norton MA
118 PM EDT Tue Jun 17 2025

Forecast is based on forecast start time of 1400 EDT on June 17.
If conditions become unrepresentative, contact the National
Weather Service.

.DISCUSSION...
Cloudy conditions prevail. Low risk for showers or light drizzle
this afternoon and evening, with the majority of showers remaining
to the west. Any rainfall is expected to amount to one tenth inch
or less.

.REST OF TODAY...

Sky/weather.........Mostly cloudy. Slight chance of showers late in
                    the afternoon.
Chance of pcpn......20 percent.
Chance of thunder...13 percent.
Begin/end of pcpn...
Max temperature.....Around 70.
Pcpn amount.........0.02 inches.
Mixing height.......1200 ft AGL.
Transport winds.....Southeast 8 to 10 mph.
Smoke dispersal.....Poor (7000 knot-ft).
LVORI...............4.
ADI.................10 to 15.

TIME (EDT)      2PM 3PM 4PM 5PM
Sky (%).........86  89  86  85
Weather cov.....        SCH SCH
Weather type....        RW  RW
Tstm cov........
Chc of pcpn (%).10  10  20  20
Chc of rain (%).20  20  40  50
Chc of thdr (%).10  10  10  10
Temp............68  68  68  69
Mix hgt (kft)...1.2 1.0 1.0 1.0
Transp wind dir.SE  SE  SE  S
Transp wind spd.10  8   9   9
LVORI...........4   4   4   4
ADI.............15  10  12  12
Vrate kt-ft/1K..11  7   8   8
Ventrate Cat....PR  PR  PR  PR

.TONIGHT...

Sky/weather.........Cloudy. Chance of showers through the night.
                    Patchy fog in the late evening and overnight.
Chance of pcpn......50 percent.
Chance of thunder...13 percent.
Begin/end of pcpn...
Min temperature.....Around 64.
Pcpn amount.........0.04 inches.
Mixing height.......600 ft AGL.
Transport winds.....South 8 to 12 mph.
Smoke dispersal.....Poor (4400 knot-ft).
LVORI...............5.
ADI.................4 to 11.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........83  85  92  89  84  94  90  91  92  96  95  94
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........
Chc of pcpn (%).30  30  40  50  30  30  30  40  30  40  50  40
Chc of rain (%).20  40  40  40  40  40  40  40  40  30  40  20
Chc of thdr (%).10  10  10  10  10  10  10  10  10  10  10  10
Temp............68  68  67  66  66  66  66  65  65  65  65  65
Mix hgt (kft)...0.7 0.6 0.6 0.6 0.8 0.7 0.7 0.8 0.7 0.6 0.7 0.6
Transp wind dir.S   S   S   S   S   S   S   S   S   S   S   S
Transp wind spd.10  9   10  10  10  12  10  10  9   9   9   8
LVORI...........4   4   5   5   6   5   6   6   6   6   6   6
ADI.............11  10  7   7   7   8   5   5   4   4   4   8
Vrate kt-ft/1K..6   5   5   6   7   7   7   7   5   5   5   4
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

$$
Forecaster...Belk
Requested by...Lauren Mahoney
Type of request...OTHER
.TAG 2516115.0/BOX
.DELDT 06/17/25
.FormatterVersion 2.0.0
.EMAIL lmahoney@somervillema.gov