304 
FNUS75 KSLC 201606
FWSSLC

Spot Forecast for Gardner Fire
National Weather Service Salt Lake City UT
1006 AM MDT Thu Aug 20 2020

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING...

.DISCUSSION...
The main concern at the fire site today will be the threat of 
widely scattered thunderstorms. While the bulk of the thunderstorm
activity today is expected to remain east of the I-15 corridor 
(and east of the fire site), cannot rule out the low-probability 
but high-impact possibility of a thunderstorm producing dry 
lightning and strong gusty outflow winds at the site. The more 
likely scenario is continued hot and dry conditions, while seeing 
afternoon buildups east of the fire site. Otherwise, winds will 
remain mostly terrain driven, with some mixing of gustier winds up
to 20 mph this afternoon, especially over the ridge tops. Widely 
scattered thunderstorms are again possible on Friday, but with the
focus once again expected to be east of the fire site.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent cloud cover) then becoming 
                    partly cloudy (35-45 percent cloud cover). A 
                    slight chance of a dry thunderstorm in the 
                    afternoon. 
Chance of pcpn......20 percent. 
CWR.................5 percent. 
LAL.................1 until 1200, then 2. 
Max temperature.....82-84. 
Min humidity........16-18%. 
Wind (20 ft)........East-northeast/downslope winds 2-4 mph becoming 
					southwest 8-12 mph in the afternoon with gusts
					up to 20 mph, particularly on the ridge tops.
Haines Index........5 ..moderate. 

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent cloud cover). A 
                    slight chance of a dry thunderstorm early in the 
                    evening. 
Chance of pcpn......20 percent. 
CWR.................5 percent. 
LAL.................2 until 2400, then 1. 
Min temperature.....62-64. 
Max humidity........31-33%. 
Wind (20 ft)........Southwest winds 4-11 mph becoming east-northeast/
					downslope 2-5 mph overnight.
Haines Index........5 ..moderate. 

.FRIDAY...

Sky/weather.........Sunny (0-5 percent cloud cover) then becoming 
                    partly cloudy (25-35 percent cloud cover). A 
                    slight chance of a dry thunderstorm in 
                    the afternoon. 
Chance of pcpn......20 percent. 
CWR.................5 percent. 
LAL.................1 until 1200, then 2. 
Max temperature.....81-83. 
Min humidity........15-17%. 
Wind (20 ft)........East-northeast/downslope winds 2-5 mph in the morning
					becoming 8-11 mph late in the afternoon. 
Haines Index........5 ..moderate. 

$$
Forecaster...Church
Requested by...Micah Suwyn
Type of request...WILDFIRE
.TAG 2011259.1/SLC
.DELDT 08/20/20
.FormatterVersion 1.0.26
.EMAIL Micah.Suwyn@usda.gov