150
FNUS75 KREV 130206
FWSREV

Spot Forecast for Big...SFIDC
National Weather Service Reno NV
706 PM PDT Sat Jul 12 2025

Forecast is based on forecast start time of 0600 PDT on July 13.
If conditions become unrepresentative...contact the National
Weather Service in Reno.

...HEAT ADVISORY IN EFFECT UNTIL 11 AM PDT WEDNESDAY...

.DISCUSSION...

* Hot temperatures continue through early next week with terrain
  driven winds through the morning hours and northerly winds in
  the afternoon.

* Dry weather with poor overnight recoveries continues through
  the weekend and early next week. However, there is a 5-10%
  chance of thunderstorms each afternoon.

* Temperatures start a slight cool down by mid-week, at the same
  time that winds slightly increase.

.SUNDAY...

Sky/Weather.........Sunny.
Temperature.........70-73 at forecast start...Max 102-105.
RH..................25-28% at forecast start...Min 6-9%.
20-Foot Winds.......Winds west at 4-7 mph at forecast
                    start...otherwise North 5-10 mph in the late
morning becoming northeast 7-10 mph with gusts
up to 15 mph in the late afternoon.
Chc Wetting Rain....0%.
Chance of thunder...5-10% in the afternoon.
Mixing Height.......14300-15300 ft agl.
Transport Winds.....Light winds becoming southeast around 10 mph in
                    the afternoon.
Ventilation.........Poor to very good in the morning increasing to
excellent late in the afternoon.

TIME (PDT)      6 AM      9 AM      NOON      3 PM
Sky (%).........8         2         2         8
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
CWR.............0         0         0         0
Chc of thdr (%).0         0         10        10
Temp............72        83        96        103
RH..............27        20        12        7
20 FT wind......W 6G10    N 5       N 7G10    NE 10G15
Eye level wind..W 4G6     N 3       N 4G6     NE 6G9
Mx ht msl (kft).1.5       4.3       12        16
Transport wind..W 5       N 5       SE 10     S 10
Vrate kt-ft/1K..8         22        97        143
Ventrate Cat....POOR      FAIR      VYGD      EXNT

.SUNDAY NIGHT...

Sky/Weather.........Partly cloudy then becoming clear.
Temperature.........Min 70-75.
RH..................Max 22-26%.
20-Foot Winds.......North winds 7-10 mph shifting to the west
overnight.
Chc Wetting Rain....1%.
Chance of thunder...5-10% in the evening.
Mixing Height.......15500-15700 ft agl decreasing to 1300-1500 ft
                    agl in the late evening and overnight.
Transport Winds.....South around 10 mph shifting to the west in the
                    late evening and overnight.
Ventilation.........Excellent decreasing to marginal in the late
                    evening and overnight.

TIME (PDT)      5 PM      8 PM      11 PM     2 AM
Sky (%).........25        29        7         5
Weather cov.....
Weather type....NONE      NONE      NONE      NONE
Tstm cov........
CWR.............0         0         0         0
Chc of thdr (%).10        10        0         0
Temp............103       96        86        78
RH..............6         9         17        22
20 FT wind......N 10G15   N 8G15    W 8G15    W 7G10
Eye level wind..N 6G9     N 5G9     W 5G9     W 4G6
Mx ht msl (kft).16        1.4       1.5       1.5
Transport wind..S 10      NW 10     W 10      W 10
Vrate kt-ft/1K..141       13        10        10
Ventrate Cat....EXNT      MRGL      MRGL      MRGL

$$
Forecaster...Crespo
Requested by...Ryan Gaines
Type of request...WILDFIRE
.TAG 2517895.0/REV
.DELDT 07/12/25
.FormatterVersion 2.0.0
.EMAIL rgaines@blm.gov