Alert archive / Idaho / Red Flag Warnings in 2021

Red Flag Warning 3, NWS Pocatello, ID

June 18, 202121 counties in Idaho

NWS Pocatello, ID issued this red flag warning at Jun 18, 2021, 1:41 PM MDT for 21 counties in Idaho. It took effect at Jun 19, 2021, 12:00 PM MDT. It was in force for 10 hr. 25 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Jun 18, 2021, 1:41 PM MDT (19:41 UTC)
In effect from
Jun 19, 2021, 12:00 PM MDT
Expired
Jun 19, 2021, 10:00 PM MDT
In force
10 hr
Issued by
NWS Pocatello, ID
All 21 counties

Bannock County, ID, Bear Lake County, ID, Bingham County, ID, Blaine County, ID, Bonneville County, ID, Butte County, ID, Caribou County, ID, Cassia County, ID, Clark County, ID, Franklin County, ID, Fremont County, ID, Jefferson County, ID, Jerome County, ID, Lemhi County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Oneida County, ID, Power County, ID, Teton County, ID, Twin Falls County, ID

The radar

The Pocatello radar (KSFX), 7 km from the middle of the area, began a volume at 19:46 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.

What was reported inside it

TimeReportWhereRemark
Jun 19, 12:50 PM MDTNON-TSTM WND GST 6012 Nw Atomic City, IDMESONET STATION TRA REACTOR TECHNOLOGIES COMPLEX.
Jun 19, 3:40 PM MDTNON-TSTM WND GST 5011 W Osgood, IDMESONET STATION KET KETTLE BUTTE.
Jun 19, 3:55 PM MDTNON-TSTM WND GST 381 Sse Arco, IDMESONET STATION ARC ARCO.
Jun 19, 4:04 PM MDTNON-TSTM WND GST 432 Nw Idaho Falls, IDASOS STATION KIDA IDAHO FALLS AIRPORT.
Jun 19, 4:15 PM MDTNON-TSTM WND GST 5112 Se Butte City, IDMESONET STATION RWM RADIOACTIVE WASTE MANAGEMENT.
Jun 19, 4:25 PM MDTNON-TSTM WND GST 437 S Howe, IDMESONET STATION BAS BASE OF HOWE PEAK.
Jun 19, 4:30 PM MDTNON-TSTM WND GST 4513 Ne Atomic City, IDMESONET STATION EBR MATERIALS FUELS COMPLEX.
Jun 19, 4:35 PM MDTNON-TSTM WND GST 4912 Nnw Atomic City, IDMESONET STATION GRI INTEC/GRID 3.
Jun 19, 4:44 PM MDTNON-TSTM WND GST 405 N Owinza, IDMESONET STATION ROCI1 5 N OWINZA.
Jun 19, 4:50 PM MDTNON-TSTM WND GST 419 E Butte City, IDMESONET STATION DEA DEAD MAN CANYON.
Jun 19, 5:05 PM MDTNON-TSTM WND GST 4310 Sse Howe, IDMESONET STATION NRF NAVAL REACTORS FACILITY.
Jun 19, 5:05 PM MDTNON-TSTM WND GST 5120 Ese Craters Of Moon, IDMESONET STATION BIG COXS WELL.
Jun 19, 5:15 PM MDTNON-TSTM WND GST 4311 Wsw Atomic City, IDMESONET STATION SUM BIG SOUTHERN SUMMIT.
Jun 19, 5:15 PM MDTNON-TSTM WND GST 4412 Nw Atomic City, IDMESONET STATION LOS LOST RIVER REST AREA.
Jun 19, 5:35 PM MDTNON-TSTM WND GST 3911 Wsw Monteview, IDMESONET STATION LOF SPECIFIC MANUFACTURING CAPABILITY.
Jun 19, 5:35 PM MDTNON-TSTM WND GST 459 Nw Atomic City, IDMESONET STATION 690 CENTRAL FACILITIES.
Jun 19, 5:35 PM MDTNON-TSTM WND GST 478 Nnw Atomic City, IDMESONET STATION PBF CRITICAL INFRASTRUCTURE COMPLEX.
Jun 19, 5:40 PM MDTNON-TSTM WND GST 49Atomic City, IDMESONET STATION ATO ATOMIC CITY.
Jun 19, 5:45 PM MDTNON-TSTM WND GST 543 W Taber, IDMESONET STATION TAB TABER.
Jun 19, 5:47 PM MDTNON-TSTM WND GST 3917 W Aberdeen, IDMESONET STATION CYFI1 17 W ABERDEEN.
Jun 19, 5:50 PM MDTNON-TSTM WND GST 501 Nnw Craters Of Moon, IDMESONET STATION CRA CRATERS OF THE MOON.
Jun 19, 5:54 PM MDTNON-TSTM WND GST 4714 S Craters Of Moon, IDMESONET STATION PBUI1 POTTER BUTTE.
Jun 19, 6:39 PM MDTNON-TSTM WND GST 479 W Black Pine, IDMESONET STATION MOFI1 MOBURG CANYON.
Jun 19, 7:00 PM MDTNON-TSTM WND GST 489 Ssw Mud Lake, IDMESONET STATION ROV ROVER.
Jun 19, 8:15 PM MDTNON-TSTM WND GST 421 Ene Richfield, IDMESONET STATION RIC RICHFIELD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Salt Lake City I, UT (KSLC), launched 12:00Z, 7.7 hours before the alert went out and 274 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 2021-06-18Temperature 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°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 2021-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.193958Sfc1 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
3680 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

455 
WWUS85 KPIH 181941
RFWPIH

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
141 PM MDT Fri Jun 18 2021

...RED FLAG WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH 
SATURDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR 
FIRE WEATHER ZONES 410, 411, 413 BELOW 6000 FEET, 425 AND 427 
BELOW 7000 FEET...

IDZ410-425-191000-
/O.UPG.KPIH.FW.A.0001.210619T1800Z-210620T0400Z/
/O.NEW.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Upper Snake River Valley/Idaho Falls BLM-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
141 PM MDT Fri Jun 18 2021

...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT SATURDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
410 AND 425...

The National Weather Service in Pocatello has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from noon to 10 PM MDT Saturday. The Fire Weather Watch is
no longer in effect.

* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River 
  Valley/Idaho Falls BLM and Fire Weather Zone 425 Middle Snake 
  River Valley/Twin Falls BLM north of the Snake River.

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

* RELATIVE HUMIDITY...As low as 11 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ411-191000-
/O.UPG.KPIH.FW.A.0001.210619T1800Z-210620T0400Z/
/O.NEW.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Centennial Mountains and Snake River Range/Targhee NF-
141 PM MDT Fri Jun 18 2021

...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT SATURDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 411...

The National Weather Service in Pocatello has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from noon to 10 PM MDT Saturday. The Fire Weather Watch is
no longer in effect.

* AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and 
  Snake River Range/Targhee NF.

* WINDS...Southwest 10 to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 15 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ413-191000-
/O.UPG.KPIH.FW.A.0001.210619T1800Z-210620T0400Z/
/O.NEW.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Caribou Range/Caribou NF-
141 PM MDT Fri Jun 18 2021

...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT SATURDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 413...

The National Weather Service in Pocatello has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from noon to 10 PM MDT Saturday. The Fire Weather Watch is
no longer in effect.

* AFFECTED AREA...Fire Weather Zone 413 Caribou Range/Caribou NF.

* WINDS...West 15 to 25 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 12 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ427-191000-
/O.UPG.KPIH.FW.A.0001.210619T1800Z-210620T0400Z/
/O.NEW.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
141 PM MDT Fri Jun 18 2021

...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT SATURDAY FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 427...

The National Weather Service in Pocatello has issued a Red Flag
Warning for gusty winds and low relative humidity, which is in
effect from noon to 10 PM MDT Saturday. The Fire Weather Watch is
no longer in effect.

* AFFECTED AREA...Fire Weather Zone 427 Goose Creek and Raft 
  River Valley/Southern Sawtooth NF/Twin Falls BLM south of the 
  Snake River.

* WINDS...Northwest 15 to 25 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 13 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$
3 follow-up statements
227 
WWUS85 KPIH 190704
RFWPIH

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
104 AM MDT Sat Jun 19 2021

...RED FLAG WARNING IN EFFECT FROM SATURDAY AFTERNOON THROUGH
SATURDAY EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONES 410, 411, 413, 425 AND 427 BELOW 7000 FEET...

IDZ410-425-192100-
/O.CON.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Upper Snake River Valley/Idaho Falls BLM-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
104 AM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 10 PM
MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONES 410 AND 425...

* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River 
  Valley/Idaho Falls BLM and Fire Weather Zone 425 Middle Snake 
  River Valley/Twin Falls BLM north of the Snake River.

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

* RELATIVE HUMIDITY...As low as 11 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ411-192100-
/O.CON.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Centennial Mountains and Snake River Range/Targhee NF-
104 AM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 10 PM
MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONE 411...

* AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and 
  Snake River Range/Targhee NF.

* WINDS...Southwest 10 to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 15 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ413-192100-
/O.CON.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Caribou Range/Caribou NF-
104 AM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 10 PM
MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONE 413...

* AFFECTED AREA...Fire Weather Zone 413 Caribou Range/Caribou NF.

* WINDS...West 15 to 25 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 12 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ427-192100-
/O.CON.KPIH.FW.W.0003.210619T1800Z-210620T0400Z/
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
104 AM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 10 PM
MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR
FIRE WEATHER ZONE 427...

* AFFECTED AREA...Fire Weather Zone 427 Goose Creek and Raft 
  River Valley/Southern Sawtooth NF/Twin Falls BLM south of the 
  Snake River.

* WINDS...Northwest 15 to 25 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 13 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$
121 
WWUS85 KPIH 192025
RFWPIH

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
225 PM MDT Sat Jun 19 2021

...RED FLAG WARNING IN EFFECT THROUGH 10 PM MDT THIS EVENING FOR 
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 410, 
411, 413, 425 AND 427 BELOW 7000 FEET...

IDZ410-425-200400-
/O.CON.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Upper Snake River Valley/Idaho Falls BLM-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
225 PM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONES 410 AND 425...

* AFFECTED AREA...Fire Weather Zone 410 Upper Snake River 
  Valley/Idaho Falls BLM and Fire Weather Zone 425 Middle Snake 
  River Valley/Twin Falls BLM north of the Snake River.

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

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

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ411-200400-
/O.CON.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Centennial Mountains and Snake River Range/Targhee NF-
225 PM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONE 411...

* AFFECTED AREA...Fire Weather Zone 411 Centennial Mountains and 
  Snake River Range/Targhee NF.

* WINDS...West 10 to 20 mph with gusts up to 35 mph.

* RELATIVE HUMIDITY...As low as 15 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ413-200400-
/O.CON.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Caribou Range/Caribou NF-
225 PM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONE 413...

* AFFECTED AREA...Fire Weather Zone 413 Caribou Range/Caribou NF.

* WINDS...West 10 to 20 mph with gusts up to 35 mph.

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

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$

IDZ427-200400-
/O.CON.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
225 PM MDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM MDT THIS
EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE
WEATHER ZONE 427...

* AFFECTED AREA...Fire Weather Zone 427 Goose Creek and Raft 
  River Valley/Southern Sawtooth NF/Twin Falls BLM south of the 
  Snake River.

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

* RELATIVE HUMIDITY...As low as 11 percent.

* IMPACTS...Strong winds and low humidity coupled with dry fuels 
  will create critical fire weather conditions.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly based on these criteria
for Southeastern Idaho:

- Relative humidity at or below 15 percent and wind gusts of at
least 25 mph in the mountains, or 30 mph in the Snake Plain.

- Thunderstorm coverage of 25 percent, without specific rainfall
criteria.

- Other high impact events deemed critical by the National
Weather Service and area fire management agencies.

&&

$$
383 
WWUS85 KPIH 200353
RFWPIH

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
953 PM MDT Sat Jun 19 2021

IDZ410-425-200500-
/O.EXP.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Upper Snake River Valley/Idaho Falls BLM-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
953 PM MDT Sat Jun 19 2021

...RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES
410 AND 425...

Humidity has risen above 15 percent at all observing stations, and
only a few of the reports indicate wind gusts in excess of 30 mph.
The Red Flag Warning will be allowed to expire.

$$

IDZ411-200500-
/O.EXP.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Centennial Mountains and Snake River Range/Targhee NF-
953 PM MDT Sat Jun 19 2021

...RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 411...

Humidity has risen above 15 percent at all observing stations, and
only a few of the reports indicate wind gusts in excess of 25 
mph. The Red Flag Warning will be allowed to expire.

$$

IDZ413-200500-
/O.EXP.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Caribou Range/Caribou NF-
953 PM MDT Sat Jun 19 2021

...RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 413...

umidity has risen above 15 percent at all observing stations, and
only a few of the reports indicate wind gusts in excess of 25 
mph. The Red Flag Warning will be allowed to expire.

$$

IDZ427-200500-
/O.EXP.KPIH.FW.W.0003.000000T0000Z-210620T0400Z/
Goose Creek and Raft River Valley/Southern Sawtooth NF/Twin Falls
BLM south of the Snake River-
953 PM MDT Sat Jun 19 2021

...RED FLAG WARNING WILL EXPIRE AT 10 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 427...

umidity has risen above 15 percent at all observing stations, and
only a few of the reports indicate wind gusts in excess of 25 
mph. The Red Flag Warning will be allowed to expire.

$$

Messick

The office that day

Everything else NWS Pocatello, ID issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 1:31 PM MDTLake Wind AdvisoryPIHBannock, Bingham, Power31 hr
Jun 18, 1:31 PM MDTWind AdvisoryPIHBingham, Bonneville, Butte, Jefferson31 hr

Nearby

Red Flag Warnings in Idaho, 2021Every red flag warning in 2021

Sources

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