921
FNUS75 KBOU 230341
FWSBOU

Spot Forecast for Lightning Strike...Jefferson County
National Weather Service Denver/Boulder CO
941 PM MDT Sat Aug 22 2026

If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...

Current radar shows storms have subsided with only some showers
remaining in the area. Shower potential will stick around for the
next hour or two, but the airmass should be stable enough to keep
lightning concerns minimal. Closest observations show
southwesterly winds in place with gusts between 15-20 mph, and RH
around 80-85%. Winds are expected to turn more southerly in the
next hour, decreasing in speeds by around 2300. For the overnight,
winds should be light and sit somewhere between south-southwest
to west for direction. By around 0600, winds should become light
and variable, with a few gusts between 10-15 mph possible before
shower and storm chances start to increase by 0100. Storms
tomorrow will be capable of producing gusty variable winds up to
40 mph, lightning, and localized heavy rainfall. RH recoveries
are expected to be good tonight and remain around 25-30% at their
lowest tomorrow. Outside of the gusty winds with passing
showers/storms tomorrow, winds should make a northerly transition
by early afternoon with gusts staying under 20 mph when showers
and storms are not around. Temps should drop into the low 50s
tonight, and warm into the upper 70s Sunday afternoon.



.REST OF TONIGHT...

Sky/weather.........Mostly cloudy (70-80 percent) until 0300, then
                    partly cloudy (35-45 percent). Slight chance of
                    rain showers until 2400.
Chance of pcpn......20 percent.
Min temperature.....Around 51.
Max humidity........77 percent.
Surface winds (mph).Southwest winds 5 to 8 mph until 0300, then
                    west 5 to 12 mph.
Snowfall amount.....0.0 inches.

TIME (MDT)      10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........80  83  74  76  64  48  39  34
Weather cov.....SCH SCH
Weather type....RW  RW
Tstm cov........
Chc of pcpn (%).20  20  10  10  0   0   0   0
Temp............57  57  56  55  54  54  53  53
RH..............77  75  77  77  77  74  74  71
Surface wnd dir.SW  SW  SW  W   W   W   W   W
Surface wnd spd.7   6   6   6   6   7   7   7
Surface wnd gst.12  9   9   9   10  12  12  13

.SUNDAY...

Sky/weather.........Partly cloudy (30-40 percent) until 1200, then
                    mostly cloudy (60-70 percent). Slight chance of
                    rain showers and thunderstorms after 1200 until
                    1300, then chance of rain showers and
                    thunderstorms.
Chance of pcpn......50 percent.
Max temperature.....Around 79.
Min humidity........31 percent.
Surface winds (mph).West winds 6 to 11 mph until 1100, then
                    northwest 5 to 12 mph until 1300, then north
                    around 6 mph until 1400, then 5 to 7 mph until
                    1700, then northwest around 6 mph.
Snowfall amount.....0.0 inches.

TIME (MDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........36  41  31  35  30  42  53  61  69  72  76  75
Weather cov.....                        SCH CHC CHC CHC CHC CHC
Weather type....                        RW  RW  RW  RW  RW  RW
Tstm cov........                        SCH CHC CHC CHC CHC CHC
Chc of pcpn (%).0   0   0   0   0   10  20  30  30  50  50  50
Temp............52  52  57  64  72  76  78  76  75  74  70  71
RH..............74  77  67  56  41  34  31  33  34  37  42  42
Surface wnd dir.W   W   W   W   NW  NW  NW  N   NE  N   N   NW
Surface wnd spd.8   9   9   8   9   8   6   6   6   6   5   6
Surface wnd gst.13  15  16  14  16  14  12  10  12  12  9   10

$$
Forecaster...Bonner
Requested by...LILY NEILSON
Type of request...OTHER
.TAG 2620277.0/BOU
.DELDT 08/22/26
.FormatterVersion 2.0.0
.EMAIL LILY.NEILSON@JEFFCOM911CO.GOV