Alert archive / Utah / Red Flag Warnings in 2020
Red Flag Warning 8, NWS Salt Lake City, UT
NWS Salt Lake City, UT issued this red flag warning at Jun 14, 2020, 12:51 PM MDT for 17 counties in Utah. It took effect at Jun 15, 2020, 12:00 PM MDT. It was in force for 33 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
- Jun 14, 2020, 12:51 PM MDT (18:51 UTC)
- In effect from
- Jun 15, 2020, 12:00 PM MDT
- Expired
- Jun 16, 2020, 9:00 PM MDT
- In force
- 33 hr
- Issued by
- NWS Salt Lake City, UT
Counties Beaver County, UT, Box Elder County, UT, Carbon County, UT, Davis County, UT, Emery County, UT, Garfield County, UT, Iron County, UT, Juab County, UT, Kane County, UT, Millard County, UT, Salt Lake County, UT, San Juan County, UT, Sanpete County, UT, Tooele County, UT, Utah County, UT, Washington County, UT, Wayne County, UT
The radar
The Cedar City radar (KICX), 185 km from the middle of the area, began a volume at 18:48 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, 6.9 hours before the alert went out and 184 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1759 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- -38 m²/s²
- 0-3 km storm-relative helicity
- 147 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
559 WWUS85 KSLC 141851 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1251 PM MDT Sun Jun 14 2020 UTZ492-495-150300- /O.UPG.KSLC.FW.A.0006.200615T1800Z-200617T0300Z/ /O.NEW.KSLC.FW.W.0008.200615T1800Z-200617T0300Z/ Central Utah West Desert-Color Country West Desert- 1251 PM MDT Sun Jun 14 2020 ...RED FLAG WARNING IN EFFECT FROM NOON MONDAY TO 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 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 Monday to 9 PM MDT Tuesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest 20 to 25 mph with gusts up to 40 mph Monday. Southwest 25 to 30 mph with gusts up to 50 mph Tuesday. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ497-498-150300- /O.UPG.KSLC.FW.A.0006.200616T1800Z-200617T0300Z/ /O.NEW.KSLC.FW.W.0008.200616T1800Z-200617T0300Z/ Mojave Desert-Grand Staircase- 1251 PM MDT Sun Jun 14 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 9 PM MDT Tuesday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 25 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 5-10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ478-150300- /O.NEW.KSLC.FW.W.0008.200615T1800Z-200616T0300Z/ Salt Lake Desert- 1251 PM MDT Sun Jun 14 2020 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 478... 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 Monday. * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert, primarily south of I-80. * WINDS...South 20 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS....Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
6 follow-up statements
600 WWUS85 KSLC 150415 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1015 PM MDT Sun Jun 14 2020 UTZ492-495-151215- /O.CON.KSLC.FW.W.0008.200615T1800Z-200617T0300Z/ Central Utah West Desert-Color Country West Desert- 1015 PM MDT Sun Jun 14 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON MONDAY TO 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest 20 to 25 mph with gusts up to 40 mph Monday. Southwest 25 to 30 mph with gusts up to 50 mph Tuesday. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ478-151215- /O.CON.KSLC.FW.W.0008.200615T1800Z-200616T0300Z/ Salt Lake Desert- 1015 PM MDT Sun Jun 14 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 478... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert. * WINDS...South 20 to 25 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS....Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ497-498-151215- /O.CON.KSLC.FW.W.0008.200616T1800Z-200617T0300Z/ Mojave Desert-Grand Staircase- 1015 PM MDT Sun Jun 14 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 25 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 5-10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
794 WWUS85 KSLC 150923 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 323 AM MDT Mon Jun 15 2020 UTZ492-495-152200- /O.CON.KSLC.FW.W.0008.200615T1800Z-200617T0300Z/ Central Utah West Desert-Color Country West Desert- 323 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT TUESDAY 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...Southwest 20 to 25 mph with gusts up to 40 mph Monday. Southwest 25 to 30 mph with gusts up to 50 mph Tuesday. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ478-152200- /O.CON.KSLC.FW.W.0008.200615T1800Z-200616T0300Z/ Salt Lake Desert- 323 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 478... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert. * WINDS...South 20 to 25 mph with gusts up to 35 mph. Winds switching to the northwest and remaining gusty late this afternoon through mid-evening. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS....Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ497-498-152200- /O.CON.KSLC.FW.W.0008.200616T1800Z-200617T0300Z/ Mojave Desert-Grand Staircase- 323 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 25 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 5-10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
996 WWUS85 KSLC 151730 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 1130 AM MDT Mon Jun 15 2020 UTZ489-160130- /O.EXA.KSLC.FW.W.0008.200615T1800Z-200617T0300Z/ San Rafael Swell- 1130 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 489... The National Weather Service in Salt Lake City has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 9 PM MDT Tuesday. * AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell. * WINDS...South 20 to 30 mph with gusts 35 to 45 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ496-160130- /O.EXA.KSLC.FW.W.0008.200615T1800Z-200616T0300Z/ Color Country Mountains- 1130 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 496... 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 496 Color Country Mountains. * WINDS...Southwest 10 to 20 mph with gusts 25 to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS....Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ492-495-160130- /O.CON.KSLC.FW.W.0008.200615T1800Z-200617T0300Z/ Central Utah West Desert-Color Country West Desert- 1130 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 492 AND 495... * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Today, southwest 20 to 25 mph with gusts up to 40 mph. Tuesday, southwest 25 to 35 mph with gusts 40 to 50 mph. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ478-160130- /O.CON.KSLC.FW.W.0008.200615T1800Z-200616T0300Z/ Salt Lake Desert- 1130 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 478... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert. * WINDS...South 20 to 25 mph with gusts up to 35 mph. Winds switching to the northwest and remaining gusty late this afternoon through early evening. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS....Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ497-498-160130- /O.CON.KSLC.FW.W.0008.200616T1800Z-200617T0300Z/ Mojave Desert-Grand Staircase- 1130 AM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 20 to 30 mph with gusts 35 to 45 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
774 WWUS85 KSLC 152053 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 253 PM MDT Mon Jun 15 2020 UTZ489-492-495-160500- /O.CON.KSLC.FW.W.0008.000000T0000Z-200617T0300Z/ San Rafael Swell-Central Utah West Desert- Color Country West Desert- 253 PM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 489... 492 AND 495... * AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest 20 to 30 mph with gusts 40 to 50 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ478-160300- /O.CON.KSLC.FW.W.0008.000000T0000Z-200616T0300Z/ Salt Lake Desert- 253 PM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 478... * AFFECTED AREA...Fire Weather Zone 478 Salt Lake Desert, mainly south of I-80. * WINDS...South 15 to 25 mph with gusts up to 35 mph, mainly south of I-80. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS....Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ UTZ496-160300- /O.CON.KSLC.FW.W.0008.000000T0000Z-200616T0300Z/ Color Country Mountains- 253 PM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 496... * AFFECTED AREA...Fire Weather Zone 496 Color Country Mountains. * WINDS...Southwest 15 to 20 mph with gusts 25 to 35 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS....Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ497-498-160500- /O.CON.KSLC.FW.W.0008.200616T1800Z-200617T0300Z/ Mojave Desert-Grand Staircase- 253 PM MDT Mon Jun 15 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 9 PM MDT TUESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 20 to 30 mph with gusts 35 to 45 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
992 WWUS85 KSLC 160853 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 253 AM MDT Tue Jun 16 2020 UTZ489-492-495-162200- /O.CON.KSLC.FW.W.0008.000000T0000Z-200617T0300Z/ San Rafael Swell-Central Utah West Desert- Color Country West Desert- 253 AM MDT Tue Jun 16 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 489... 492 AND 495... * AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest 20 to 30 mph with gusts to 50 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ497-498-162200- /O.CON.KSLC.FW.W.0008.200616T1800Z-200617T0300Z/ Mojave Desert-Grand Staircase- 253 AM MDT Tue Jun 16 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 20 to 30 mph with gusts to 45 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
805 WWUS85 KSLC 162154 RFWSLC URGENT - FIRE WEATHER MESSAGE National Weather Service Salt Lake City UT 354 PM MDT Tue Jun 16 2020 UTZ489-492-495-170300- /O.CON.KSLC.FW.W.0008.000000T0000Z-200617T0300Z/ San Rafael Swell-Central Utah West Desert- Color Country West Desert- 354 PM MDT Tue Jun 16 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 489... 492 AND 495... * AFFECTED AREA...Fire Weather Zone 489 San Rafael Swell...Fire Weather Zone 492 Central Utah West Desert and Fire Weather Zone 495 Color Country West Desert. * WINDS...Southwest 20 to 30 mph with gusts to 50 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. 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. && $$ UTZ497-498-170300- /O.CON.KSLC.FW.W.0008.000000T0000Z-200617T0300Z/ Mojave Desert-Grand Staircase- 354 PM MDT Tue Jun 16 2020 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 497 AND 498... * AFFECTED AREA...Fire Weather Zone 497 Mojave Desert and Fire Weather Zone 498 Grand Staircase. * WINDS...Southwest 20 to 30 mph with gusts to 45 mph. * RELATIVE HUMIDITY...As low as 5 to 10 percent. * IMPACTS...Critical fire weather conditions are expected. Any fire starts could spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now...or are imminent. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ For more information from NOAA/National Weather Service visit... http://weather.gov/saltlakecity
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 Jun 14, 10:36 AM MDT, 2 hours 15 minutes earlier.
Area forecast discussion, Jun 14, 10:36 AM MDT, 2 hours 15 minutes before
Area Forecast Discussion
National Weather Service Salt Lake City UT
1036 AM MDT Sun Jun 14 2020
.DISCUSSION...The immediate forecast for today remains on track
with post frontal conditions in place across much of central and
northern Utah. Winds and wind gusts were updated for Monday and
Tuesday in preparation for potentially upgrading the fire weather
watch and wind highlights.
&&
.SYNOPSIS...Weather disturbances moving east across the northern
Rockies will bring cooler, more seasonal temperatures to Utah
through the upcoming week. Any precipitation will remain across
northern Utah midweek.
&&
.SHORT TERM (Through 12Z Wednesday)...The upper low currently
center across western Washington with a trough axis extending
southeast into northern Utah will continue east-northeast into the
northern Rockies today. The vorticity lobe that rotated northeast
through Utah yesterday has finally exited northern Utah with
clearing skies across the forecast area early this morning.
The surface cold front associated with this trough extends from
southwest through northeast Utah this morning. Substantially
cooler air to the north of the front will keep temps at or below
normal today. South of the boundary temperatures will remain warm,
though a few degrees cooler than Saturday's highs.
The next upper low to move out of the Gulf of Alaska will settle
into the Pacific Northwest late Monday night/early Tuesday.
Backing of the flow downstream from the low will produce an
increasingly strong and warm southwest flow across Utah Monday.
The warmup looks to be short-lived across northern/western Utah as
a vorticity lobe rotating east-northeast from the Pacific
Northwest low crosses Northwest Utah early Tuesday. The
associated low-level baroclinic zone will lay out across northern
Utah with substantially cooler air on the north side of the
boundary. Precipitation that developed will be confined to areas
north of the baroclinic zone where some moisture exists and
adequate dynamic and thermal support for lift will exist near the
Pacific Northwest upper low.
A secondary vorticity lobe will rotate out of the parent low and
move across eastern Idaho/far northern Utah late Tuesday night.
This feature could bring another quick burst of precip as low-
level frontogenic forcing develops with the arrival of the mid-
level vorticity lobe. Significantly cooler air trailing this
feature will knock temperatures down again heading into Wednesday.
.LONG TERM (After 12Z Wednesday)... The medium range models are a
little out of phase with each other with the trough orientation from
the Northern Rockies into the western Great Basin from Wednesday
through Saturday. The EC ensemble mean and Canadian ensemble mean
(to some extent) are more in line with each other in bringing the
axis across Utah Wednesday morning and progressing it into the High
Plains Thursday into Friday. In this progressive pattern a ridge
will move into the PacNW by Friday and across the Intermountain West
by Sunday. Meanwhile, the GFS ensemble mean keeps a trough axis
sagged over the western Great Basin through Saturday with ridging
delayed by 36-48 hrs.
Have trended towards the EC (which the cluster tool shows has a
higher probability of occurring). The EC forecasts some dynamics
such as 700mb cold advection and jet support over northern Utah into
southwest Wyoming for stray to scattered showers Wednesday morning
over mainly the northern mountains and SW Wyoming. However, with the
trough being progressive the showers end by midday and a dry west to
northwest flow develops for the remainder of the extended with a
steady warming trend from 5-10 degrees below normal Wednesday to 10
degrees or more above normal by the weekend. Across the south,
temperatures will be near normal Wednesday and trend upwards to
about 5-10 degrees above normal by the weekend.
&&
.AVIATION...Minimal impacts expected at KSLC today with VFR conditions and
mainly light winds. Light northerly winds will continue through
midday before increasing in speed some this afternoon. Light
northerly wind will then continue through much of tonight. Winds may
briefly shift to the south around 10-12Z Monday morning, but could
also just become calm to light and variable.
&&
.FIRE WEATHER...A series of weather disturbances moving inland
through the Pacific Northwest will cross the northern Rockies
and northern Great Basin through midweek. Surface cold fronts
associated with these disturbances will bring cooler temperatures
to the northern fire districts, with a chance for showers
confined mainly to the northern third of Utah midweek.
These cold fronts will remain dry as they progress south into
central and southern Utah. Gusty southerly winds ahead of these
fronts along with persistent low humidity will create critical
fire weather conditions early in the week. Cooler temperatures
will finally settle into the southern half of Utah for the
latter half of the week. Decreasing winds and modestly higher
humidity values will bring a break in critical fire weather
conditions by late Wednesday or Thursday.
&&
.SLC WATCHES/WARNINGS/ADVISORIES...
UT...Fire Weather Watch from Monday afternoon through Tuesday evening
for UTZ492-495.
Fire Weather Watch from Tuesday afternoon through Tuesday
evening for UTZ497-498.
WY...None.
&&
UPDATE...Woodward/Church
SHORT TERM...Conger
LONG TERM...Struthwolf
AVIATION...Church
FIRE WEATHER...Conger
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.phpHazardous weather outlook, Jun 14, 5:15 AM MDT, 7 hours 36 minutes before
Hazardous Weather Outlook National Weather Service Salt Lake City UT 515 AM MDT Sun Jun 14 2020 UTZ001>016-019>021-517-518-WYZ021-151200- 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- 515 AM MDT Sun Jun 14 2020 This Hazardous Weather Outlook is for the western two thirds of Utah and southwest Wyoming. .DAY ONE...Today and Tonight No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Monday through Saturday Breezy conditions will return to the area Monday and Tuesday. These winds, combined with low humidities and dry fuels, will create hazardous fire weather conditions across western and southwest Utah on Monday and spreading across far southern Utah Tuesday. Cooler temperatures will spread across the northern outlook area by Tuesday. Temperatures will run around 5 to 10 degrees below normal across the north Tuesday and Wednesday. Southern and eastern Utah will see temperatures hovering around normal midweek. Precipitation will be limited to far northern Utah and southwest Wyoming late Monday night through Tuesday night. Most of the precipitation will be in the form of rain, though a few of the higher peaks could see a little snow at times. A fairly strong cold front will surge south through the outlook area Wednesday. Below normal temperatures are expected across all but the extreme southern portion of the outlook area through the end of the week. Warmer temperatures will return heading into the weekend. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. 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
Nearby
Red Flag Warnings in Utah, 2020Every red flag warning in 2020
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.