736
FNUS76 KSTO 020121
FWSSTO

Spot Forecast for Helisma RX Burn...Calaveras Consolidated Fire Protection District
National Weather Service Sacramento CA
621 PM PDT Tue Jul 1 2025

Forecast is based on ignition time of 0800 PDT on July 02.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...
Warm weather and periodically breezy winds continue through midweek, with
a cooling and drying trend into late week. Thunderstorms are not expected
anywhere near the burn site on Wednesday, though there may be some
isolated cells further up in the mountains. Winds will be primarily light
and variable overnight, with westerly flow during the day and periods of
gusts up to 20 mph in the afternoon on Wednesday (lessening for the
remainder of the week).

.WEDNESDAY...

Sky/weather.........Sunny.
Max temperature.....94-98.
Min humidity........30-34 percent.
Wind (20 ft)........
 Slope/valley.......Light and variable winds becoming west up to
9 mph in the late morning and afternoon with
gusts up to 17 mph in the afternoon.
 Ridgetop...........West 5 to 12 mph.
Mixing height.......4800 ft AGL.
Transport winds.....West 5 to 12 mph.
CWR.................0 percent.
Chance of thunder...1 percent.

TIME (PDT)      8 AM   10 AM  NOON   2 PM   4 PM
Sky cover.......CLEAR  CLEAR  CLEAR  CLEAR  CLEAR
CWR.............0      0      0      0      0
Chc of thdr (%).0      0      0      0      0
Temp............69     78     85     92     95
RH..............61     49     43     37     31
SL/VL wind......NW 3   W 5    W 6    W 7    W 9
SL/VL wind gust.6      8      12     14     17
Ridgetop wind...N 5    N 5    NE 5   NE 5   NE 5
Mix hgt (ft)....1200   1200   1800   3800   3800
Transport wind..W 5    W 5    W 6    W 8    W 8

.WEDNESDAY NIGHT...

Min temperature.....62-66.
Max humidity........65-69 percent.
Wind (20 ft)........
 Slope/valley.......West winds 5 to 9 mph with gusts up to 16 mph
in the evening becoming light and variable overnight.
Mixing height.......400 ft AGL.
Transport winds.....West 9 to 10 mph shifting to the north late in
                    the evening.

TIME (PDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Temp............94     87     79     72     69     65
RH..............34     41     51     56     61     66
SL/VL wind......W 9    W 6    W 6    NW 3   NE 2   NE 2
SL/VL wind gust.16     12     12     6      3      3
Mix hgt (ft)....4800   700    700    400    400    400
Transport wind..W 9    W 10   W 10   N 5    N 5    N 5

$$
Forecaster...SP
Requested by...Jensen Roldan
Type of request...PRESCRIBED
.TAG 2517067.0/STO
.DELDT 07/01/25
.FormatterVersion 2.0.0
.EMAIL jroldan@calcofire.org