Alert archive / Utah / Red Flag Warnings in 2018

Red Flag Warning 26, NWS Salt Lake City, UT

September 14, 201821 counties in Utah

NWS Salt Lake City, UT issued this red flag warning at Sep 14, 2018, 2:33 PM MDT for 21 counties in Utah. It took effect at Sep 15, 2018, 2:11 AM MDT. It was in force for 43 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 14, 2018, 2:33 PM MDT (20:33 UTC)
In effect from
Sep 15, 2018, 2:11 AM MDT
Expired
Sep 16, 2018, 9:00 PM MDT
In force
43 hr
Issued by
NWS Salt Lake City, UT
All 21 counties

Beaver County, UT, Box Elder County, UT, Cache County, UT, Carbon County, UT, Davis County, UT, Emery County, UT, Garfield County, UT, Iron County, UT, Juab County, UT, Millard County, UT, Morgan County, UT, Rich County, UT, Salt Lake County, UT, Sanpete County, UT, Summit County, UT, Tooele County, UT, Utah County, UT, Wasatch County, UT, Washington County, UT, Wayne County, UT, Weber County, UT

The radar

The Salt Lake City radar (KMTX), 160 km from the middle of the area, began a volume at 20:37 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 8.6 hours before the alert went out and 102 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Salt Lake City I, UT at 12:00Z on 2018-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Salt Lake City I, UT at 12:00Z on 2018-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 193 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3260 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
193 m²/s²
0-3 km storm-relative helicity
188 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

549 
WWUS85 KSLC 142033
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
233 PM MDT Fri Sep 14 2018

UTZ478-479-492-495-150445-
/O.NEW.KSLC.FW.W.0026.180916T1800Z-180917T0300Z/
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Salt Lake Desert-Wasatch Mountains-Central Utah West Desert-
Color Country West Desert-
233 PM MDT Fri Sep 14 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT SATURDAY
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...
479...492 AND 495...
...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SUNDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479...
492 AND 495...

The National Weather Service in Salt Lake City has issued a Red
Flag Warning for wind and low relative humidity, which is in
effect from noon to 9 PM MDT Sunday.

* AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire 
  Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 
  Central Utah West Desert and Fire Weather Zone 495 Color 
  Country West Desert.

* WINDS...Southwest gusts near 30 mph today, increasing to gusts
  up to 50 mph Saturday. Gusts in the 30-40 mph range Sunday
  redeveloping Sunday afternoon.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and
  10-15% mountains today, with poor overnight recovery. RH should
  trend a few percent higher Saturday. RH of 10-15% valleys near
  15% mountains Sunday.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ498-150445-
/O.UPG.KSLC.FW.A.0007.180915T1600Z-180916T0400Z/
/O.NEW.KSLC.FW.W.0025.180915T1600Z-180916T0400Z/
Grand Staircase-
233 PM MDT Fri Sep 14 2018

...RED FLAG WARNING IN EFFECT FROM 10 AM TO 10 PM MDT SATURDAY
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 498...

The National Weather Service in Salt Lake City has issued a Red
Flag Warning for wind and low relative humidity, which is in
effect from 10 AM to 10 PM MDT Saturday. The Fire Weather Watch
is no longer in effect.

* AFFECTED AREA...Fire Weather Zone 498 Grand Staircase.

* WINDS...Southwest gusts up to 40 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor 
  overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions are
either occurring now...or are imminent. A combination of strong
winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ480-482-484-493-150445-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Uinta Mountains-Western Uintah Basin-Tavaputs Plateau-
Central Utah Mountains-
233 PM MDT Fri Sep 14 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT SATURDAY
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 480...
482...484 AND 493...

* AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire 
  Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 
  Tavaputs Plateau and Fire Weather Zone 493 Central Utah 
  Mountains.

* WINDS...Southwest gusts near 30 mph today, increasing to gusts 
  up to 50 mph Saturday.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 
  10-15% mountains today, with poor overnight recovery. RH 
  should trend a few percent higher Saturday.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ483-488-489-497-150445-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Southern Ashley National Forest-Manti National Forest-
San Rafael Swell-Mojave Desert-
233 PM MDT Fri Sep 14 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT SATURDAY
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 483...
488...489 AND 497...

* AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National 
  Forest...Fire Weather Zone 488 Manti National Forest...Fire 
  Weather Zone 489 San Rafael Swell and Fire Weather Zone 497 
  Mojave Desert.

* WINDS...Southwest gusts up to 40 mph. Strongest Saturday
  afternoon.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% today, with 
  poor overnight recovery. RH should trend a few percent higher 
  Saturday.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ481-150400-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180915T0400Z/
Western Ashley National Forest-
233 PM MDT Fri Sep 14 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
481...

* AFFECTED AREA...Fire Weather Zone 481 Western Ashley National 
  Forest.

* WINDS...Southwest gusts up to 40 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor 
  overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity
7 follow-up statements
202 
WWUS85 KSLC 150811
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
211 AM MDT Sat Sep 15 2018

UTZ478-479-492-495-152300-
/O.CAN.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
/O.EXT.KSLC.FW.W.0026.180915T0811Z-180917T0300Z/
Salt Lake Desert-Wasatch Mountains-Central Utah West Desert-
Color Country West Desert-
211 AM MDT Sat Sep 15 2018

...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM MDT SUNDAY FOR WIND
AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479...
492 AND 495...

* AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire 
  Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 
  Central Utah West Desert and Fire Weather Zone 495 Color 
  Country West Desert.

* WINDS...Southwest gusts between 45-55 mph today, and 35-45 mph
  Sunday.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ494-152300-
/O.EXA.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Henry Mountains-
211 AM MDT Sat Sep 15 2018

...RED FLAG WARNING IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR
WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 494...

The National Weather Service in Salt Lake City has issued a Red
Flag Warning for wind and low relative humidity, which is in
effect until 10 PM MDT this evening.

* AFFECTED AREA...Fire Weather Zone 494 Henry Mountains.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ480-482-484-493-152300-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Uinta Mountains-Western Uintah Basin-Tavaputs Plateau-
Central Utah Mountains-
211 AM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
480...482...484 AND 493...

* AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire 
  Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 
  Tavaputs Plateau and Fire Weather Zone 493 Central Utah 
  Mountains.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ483-488-489-497-152300-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Southern Ashley National Forest-Manti National Forest-
San Rafael Swell-Mojave Desert-
211 AM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
483...488...489 AND 497...

* AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National 
  Forest...Fire Weather Zone 488 Manti National Forest...Fire 
  Weather Zone 489 San Rafael Swell and Fire Weather Zone 497 
  Mojave Desert.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ498-152300-
/O.CON.KSLC.FW.W.0025.180915T1600Z-180916T0400Z/
Grand Staircase-
211 AM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO
10 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONE 498...

* AFFECTED AREA...Fire Weather Zone 498 Grand Staircase.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor 
  overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity
317 
WWUS85 KSLC 151748
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
1148 AM MDT Sat Sep 15 2018

UTZ481-160200-
/O.NEW.KSLC.FW.W.0027.180915T1748Z-180916T0400Z/
Western Ashley National Forest-
1148 AM MDT Sat Sep 15 2018

...RED FLAG WARNING IN EFFECT UNTIL 10 PM MDT THIS EVENING FOR
WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 481...

The National Weather Service in Salt Lake City has issued a Red
Flag Warning for wind and low relative humidity, which is in
effect until 10 PM MDT this evening.

* AFFECTED AREA...Fire Weather Zone 481 Western Ashley National 
  Forest.

* WINDS...Southwest gusts between 30-40 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH as low as 10-15%.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.


&&

$$

UTZ480-482-484-493-160200-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Uinta Mountains-Western Uintah Basin-Tavaputs Plateau-
Central Utah Mountains-
1148 AM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
480...482...484 AND 493...

* AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire 
  Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 
  Tavaputs Plateau and Fire Weather Zone 493 Central Utah 
  Mountains.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ483-488-489-494-497-160200-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Southern Ashley National Forest-Manti National Forest-
San Rafael Swell-Henry Mountains-Mojave Desert-
1148 AM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
483...488...489...494 AND 497...

* AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National 
  Forest...Fire Weather Zone 488 Manti National Forest...Fire 
  Weather Zone 489 San Rafael Swell...Fire Weather Zone 494 
  Henry Mountains and Fire Weather Zone 497 Mojave Desert.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ498-160200-
/O.CON.KSLC.FW.W.0025.000000T0000Z-180916T0400Z/
Grand Staircase-
1148 AM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
498...

* AFFECTED AREA...Fire Weather Zone 498 Grand Staircase.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor 
  overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ478-479-492-495-160200-
/O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
Salt Lake Desert-Wasatch Mountains-Central Utah West Desert-
Color Country West Desert-
1148 AM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SUNDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479...
492 AND 495...

* AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire 
  Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 
  Central Utah West Desert and Fire Weather Zone 495 Color 
  Country West Desert.

* WINDS...Southwest gusts between 45-55 mph today, and 35-45 mph 
  Sunday.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity
641 
WWUS85 KSLC 152217
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
417 PM MDT Sat Sep 15 2018

UTZ480-482-484-493-160400-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Uinta Mountains-Western Uintah Basin-Tavaputs Plateau-
Central Utah Mountains-
417 PM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
480...482...484 AND 493...

* AFFECTED AREA...Fire Weather Zone 480 Uinta Mountains...Fire 
  Weather Zone 482 Western Uintah Basin...Fire Weather Zone 484 
  Tavaputs Plateau and Fire Weather Zone 493 Central Utah 
  Mountains.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ481-160400-
/O.CON.KSLC.FW.W.0027.000000T0000Z-180916T0400Z/
Western Ashley National Forest-
417 PM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
481...

* AFFECTED AREA...Fire Weather Zone 481 Western Ashley National 
  Forest.

* WINDS...Southwest gusts between 30-40 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH as low as 10-15%.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ483-488-489-494-497-160400-
/O.CON.KSLC.FW.W.0024.000000T0000Z-180916T0400Z/
Southern Ashley National Forest-Manti National Forest-
San Rafael Swell-Henry Mountains-Mojave Desert-
417 PM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
483...488...489...494 AND 497...

* AFFECTED AREA...Fire Weather Zone 483 Southern Ashley National 
  Forest...Fire Weather Zone 488 Manti National Forest...Fire 
  Weather Zone 489 San Rafael Swell...Fire Weather Zone 494 
  Henry Mountains and Fire Weather Zone 497 Mojave Desert.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ498-160400-
/O.CON.KSLC.FW.W.0025.000000T0000Z-180916T0400Z/
Grand Staircase-
417 PM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE
498...

* AFFECTED AREA...Fire Weather Zone 498 Grand Staircase.

* WINDS...Southwest gusts between 35-45 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor 
  overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ478-479-492-495-160600-
/O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
Salt Lake Desert-Wasatch Mountains-Central Utah West Desert-
Color Country West Desert-
417 PM MDT Sat Sep 15 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT SUNDAY FOR
WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479...
492 AND 495...

* AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire 
  Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 
  Central Utah West Desert and Fire Weather Zone 495 Color 
  Country West Desert.

* WINDS...Southwest gusts between 45-55 mph today, and 35-45 mph 
  Sunday.

* RELATIVE HUMIDITY...Afternoon minimum RH of 5-10% valleys and 
  10-15% mountains, with poor overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity
478 
WWUS85 KSLC 160857
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
257 AM MDT Sun Sep 16 2018

UTZ478-479-492-495-162300-
/O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
Salt Lake Desert-Wasatch Mountains-Central Utah West Desert-
Color Country West Desert-
257 AM MDT Sun Sep 16 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...
479...492 AND 495...

* AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire 
  Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 
  Central Utah West Desert and Fire Weather Zone 495 Color 
  Country West Desert.

* WINDS...Southwest gusts between 30-40 mph.

* RELATIVE HUMIDITY...Afternoon minimum RH of 10-15%, with poor 
  overnight recovery.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity
511 
WWUS85 KSLC 161407
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
807 AM MDT Sun Sep 16 2018

UTZ489-494-170000-
/O.EXA.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
San Rafael Swell-Henry Mountains-
807 AM MDT Sun Sep 16 2018

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR
WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 489 AND
494...

The National Weather Service in Salt Lake City has issued a Red
Flag Warning for wind and low relative humidity, which is in
effect until 9 PM MDT this evening.

* AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell and 
  Fire Weather Zone 494 Henry Mountains.

* WINDS...Southwest 10 to 20 mph with gusts up to 30 mph.

* RELATIVE HUMIDITY...As low as 10 percent.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

UTZ478-479-492-495-170000-
/O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
Salt Lake Desert-Wasatch Mountains-Central Utah West Desert-
Color Country West Desert-
807 AM MDT Sun Sep 16 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...
479...492 AND 495...

* AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire 
  Weather Zone 479 Wasatch Mountains...Fire Weather Zone 492 
  Central Utah West Desert and Fire Weather Zone 495 Color 
  Country West Desert.

* WINDS...Southwest 15 to 25 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 10 percent.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity
300 
WWUS85 KSLC 162036
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
236 PM MDT Sun Sep 16 2018

UTZ492-495-170300-
/O.NEW.KSLC.FW.A.0008.180918T1800Z-180919T0300Z/
/O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
Central Utah West Desert-Color Country West Desert-
236 PM MDT Sun Sep 16 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND
495...
...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH
TUESDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONES 492 AND 495...

The National Weather Service in Salt Lake City has issued a Fire
Weather Watch for wind and low relative humidity, which is in
effect from Tuesday afternoon through Tuesday evening. A red flag
warning remains in effect for the area through 9 PM Sunday
evening.

* AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert 
  and Fire Weather Zone 495 Color Country West Desert.

* WINDS...South 15 to 25 mph with gusts up to 45 mph through this
  evening. Locally gusty winds are possible Monday afternoon and
  evening. Another round of southerly winds 15 to 25 mph with
  gusts to 35 mph are possible Tuesday afternoon and evening.

* RELATIVE HUMIDITY...As low as 9 percent.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

A Fire Weather Watch means that there is a potential for critical
fire weather conditions. Continue to monitor for the latest
forecasts and for possible Red Flag Warnings.

&&

$$

UTZ478-479-489-494-170300-
/O.CON.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
Salt Lake Desert-Wasatch Mountains-San Rafael Swell-
Henry Mountains-
236 PM MDT Sun Sep 16 2018

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...
479...489 AND 494...

* AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert...Fire 
  Weather Zone 479 Wasatch Mountains...Fire Weather Zone 489 San 
  Rafael Swell and Fire Weather Zone 494 Henry Mountains.

* WINDS...Southwest 10 to 20 mph with gusts up to 40 mph.

* RELATIVE HUMIDITY...As low as 10 percent.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now...or are imminent. A combination of
strong winds...low relative humidity...and warm temperatures can
contribute to extreme fire behavior.

&&

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity
091 
WWUS85 KSLC 170300
RFWSLC

URGENT - FIRE WEATHER MESSAGE
National Weather Service Salt Lake City UT
900 PM MDT Sun Sep 16 2018

UTZ492-495-171200-
/O.EXP.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
/O.CON.KSLC.FW.A.0008.180918T1800Z-180919T0300Z/
Central Utah West Desert-Color Country West Desert-
900 PM MDT Sun Sep 16 2018

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON
THROUGH TUESDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONES 492 AND 495...
...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR WIND
AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495...

* AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert 
  and Fire Weather Zone 495 Color Country West Desert.

* WINDS...South 15 to 25 mph with gusts up to 45 mph through 
  this evening. Locally gusty winds are possible Monday 
  afternoon and evening. Another round of southerly winds 15 to 
  25 mph with gusts to 35 mph are possible Tuesday afternoon and 
  evening.

* RELATIVE HUMIDITY...As low as 9 percent.

* IMPACTS...Any fires that develop will have the potential to 
  spread rapidly. Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Fire Weather Watch means that there is a potential for critical
fire weather conditions. Continue to monitor for the latest
forecasts and for possible Red Flag Warnings.

&&

$$

UTZ478-479-489-494-170400-
/O.EXP.KSLC.FW.W.0026.000000T0000Z-180917T0300Z/
Salt Lake Desert-Wasatch Mountains-San Rafael Swell-
Henry Mountains-
900 PM MDT Sun Sep 16 2018

...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR WIND
AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 478...479...
489 AND 494...

Decreasing winds overnight are not expected to increase back to 
hazardous levels for fire weather concerns Monday.

$$

For more information from NOAA/National Weather Service visit...
http://weather.gov/saltlakecity

What forecasters said that day

The local office's own words before this red flag warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Salt Lake City, UT wrote its last area forecast discussion before this red flag warning went out at Sep 14, 9:57 AM MDT, 4 hours 36 minutes earlier.

Area forecast discussion, Sep 14, 9:57 AM MDT, 4 hours 36 minutes before
Area Forecast Discussion
National Weather Service Salt Lake City UT
957 AM MDT Fri Sep 14 2018

.SYNOPSIS....A warm, dry, and breezy southwest flow will persist
through the weekend and into early next week.

&&

.DISCUSSION...The amplified long wave trough oriented along the
west coast (notable in H5 analysis) coupled with high pressure
over the southern plains continues to drive enhanced southwesterly
flow aloft across the eastern Great Basin today. The trough is
currently in the process of reloading as a short wave noted near
35N/135W is showing signs of kicking downstream as the next short
wave embedded deepens off the BritCol coast. Downstream
translation of the former will be the primary focus in the short
term period as it remains poised to progressively lift northeast
across Nevada and into Idaho Saturday.

In advance of this, do expect subtle height rises across northern
portions of the area today, and further weakening of the S-N MSLP
gradient across the western valleys as the surface trough over
northwestern Utah is poised to largely wash out. Though still
breezy, the winds across the western valleys/mtns will be a bit
lower this afternoon vs 24 hrs previous. A temporary reduction at
best.

Will be keying in on a resultant uptick of winds/temps in advance
of the kicking trough for tomorrow. Redevelopment and
strengthening of the surface trough across the northwest and a
rapid increase of H7 flow look likely to produce advisory level
winds across the west desert, while further enhancing fire weather
concerns areawide.

Going forecast remains on track. No updates needed this morning.

PREVIOUS DISCUSSION...The approaching wave also draws up moisture
into Utah from Arizona Saturday. This trend continues Sunday as
ridging develops south of the Four corners.

SREF guidance shows enough destabilization to potentially support
convection Saturday and especially Sunday. However, flow is quite
strong and would inhibit terrain circulations. Kept PoPs below
mentionable levels for now.

Another period of potential precipitation is Saturday night
across the north as the wave lifts into Idaho. Height falls and
cooling aloft are maximized during this period. However, not
enough in the guidance to mention precipitation at this point.

The EC and GFS remain in good agreement through Wednesday with a
dry and warm southwest flow prevailing. Wednesday will likely be a
windy day as both models show the trough ejecting eastward.
However, the EC brings the longwave in its entirety across Utah
while the GFS ejects a portion of the trough NE into the Northern
Rockies as energy drops southward into the western portion of the
longwave trough. The EC solution is a few degrees cooler than the
GFS by Thursday as the 700mb is west northwest, while the GFS is
developing another trough along the west coast which will cause
the 700mb winds to turn southwest and increase already. Have
played middle of the road approach beyond Wednesday as both
scenarios have support, although believe the GFS warrants more
support based on recent weather pattern.

&&

.AVIATION...The winds at the KSLC terminal should become southerly
shortly with periodic gusts up to 20 kts possible this afternoon. A
northern shift is expected between 19-21Z, however, there is a 40%
chance of the winds remaining out of the south through the evening.
Arrivals from of the SW gate could be impacted by a large wildfire
smoke plume southwest of PVU.

&&

.FIRE WEATHER...
ERC values are running close to the 97th percentile across
northern and west central Utah, closer to the 50th-69th percentile
across the southwest. ERCs have been trending higher during the
past several days.

Gusty southwest winds and single digit RH values will continue
across much of Utah into the weekend. A cold front across northern
Utah will lift north of the region this afternoon. Areas north of
the boundary will be cooler, a bit more humid, with a lighter
northwest flow this morning.

A warming trend is forecast through Saturday. RH will trend
higher a bit Saturday through Monday, before falling again.
Isolated convection is not out of the question this weekend,
especially Sunday.

Gusty southwest winds and low RH will persist across portions of
the region next week. Critical fire weather conditions look to
continue at least locally through mid week.

&&

.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Fire Weather Watch from Saturday morning through Saturday
     evening for UTZ498.

     Red Flag Warning until 10 PM MDT Saturday for UTZ478>480-482>484-
     488-489-492-493-495-497.

     Red Flag Warning until 10 PM MDT this evening for UTZ481.

WY...&&

DISCUSSION/AVIATION...Merrill/Bonnette
PREVIOUS DISCUSSION...Rogowski/Struthwolf

For more information from NOAA's National Weather Service visit...
http://weather.gov/saltlakecity

For frequently asked questions about the Area Forecast Discussion
visit...
http://weather.gov/saltlakecity/general/afd_faqs.php
Hazardous weather outlook, Sep 14, 2:09 AM MDT, 12 hours 24 minutes before
Hazardous Weather Outlook
National Weather Service Salt Lake City UT
209 AM MDT Fri Sep 14 2018

UTZ001>016-019>021-517-518-WYZ021-151300-
Cache Valley/Utah Portion-Northern Wasatch Front-
Salt Lake and Tooele Valleys-Southern Wasatch Front-
Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys-
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Western Uinta Basin-Castle Country-San Rafael Swell-
Sanpete/Sevier Valleys-West Central Utah-Southwest Utah-
Utahs Dixie and Zion National Park-South Central Utah-
Glen Canyon Recreation Area/Lake Powell-Central Mountains-
Southern Mountains-Southwest Wyoming-
209 AM MDT Fri Sep 14 2018

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Today and Tonight

Widespread critical fire weather conditions are expected due to
low humidities and strong winds.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday

Widespread critical fire weather conditions will continue through
at least Saturday due to low humidities and strong winds. These
conditions look to persist at least locally through the upcoming
week.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

For more information from NOAA/s National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx

The office that day

Everything else NWS Salt Lake City, UT issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 14, 2:07 AM MDTFire Weather WatchSLCGarfield, Kane, San Juan, Washington, Wayne12 hr
Sep 14, 2:26 PM MDTWind AdvisorySLC32 hr
Sep 14, 2:33 PM MDTRed Flag WarningSLCGarfield, Kane, San Juan, Washington, Wayne31 hr

Nearby

Red Flag Warnings in Utah, 2018Every red flag warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.