Alert archive / Idaho / Red Flag Warnings in 2018
Red Flag Warning 13, NWS Pocatello, ID
NWS Pocatello, ID issued this red flag warning at Sep 7, 2018, 2:30 PM MDT for 13 counties in Idaho. It took effect at Sep 8, 2018, 12:00 PM MDT. It was in force for 9 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 7, 2018, 2:30 PM MDT (20:30 UTC)
- In effect from
- Sep 8, 2018, 12:00 PM MDT
- Expired
- Sep 8, 2018, 9:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Pocatello, ID
Counties Bingham County, ID, Blaine County, ID, Bonneville County, ID, Butte County, ID, Clark County, ID, Fremont County, ID, Jefferson County, ID, Jerome County, ID, Lincoln County, ID, Madison County, ID, Minidoka County, ID, Power County, ID, Teton County, ID
The radar
The Pocatello radar (KSFX), 38 km from the middle of the area, began a volume at 20:33 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
Boise Airport, ID (KBOI), launched 12:00Z, 8.5 hours before the alert went out and 283 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
- 3 J/kg
- Mixed-layer CIN
- -586 J/kg
- Mixed-layer LCL
- 2799 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 45 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
192 WWUS85 KPIH 072030 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 230 PM MDT Fri Sep 7 2018 IDZ410-425-081200- /O.UPG.KPIH.FW.A.0007.180908T1800Z-180909T0300Z/ /O.NEW.KPIH.FW.W.0013.180908T1800Z-180909T0300Z/ Upper Snake River Valley/Idaho Falls BLM- Middle Snake River Valley/Twin Falls BLM north of the Snake River- 230 PM MDT Fri Sep 7 2018 ...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SATURDAY FOR STRONG 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, which is in effect from noon to 9 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AREAS AFFECTED...Fire weather zones 410 and 425. For zone 425, the most critical fire weather conditions are generally expected north and east of a line from Shoshone to Rupert. * WINDS...Southwest at 15 to 25 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...10 to 16 percent. * IMPACTS...Strong gusty winds and dry conditions could cause new or existing fires to spread rapidly. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on any one or more of 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. && $$ KSMITH/TW
2 follow-up statements
879 WWUS85 KPIH 080951 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 351 AM MDT Sat Sep 8 2018 IDZ410-425-090300- /O.CON.KPIH.FW.W.0013.180908T1800Z-180909T0300Z/ Upper Snake River Valley/Idaho Falls BLM- Middle Snake River Valley/Twin Falls BLM north of the Snake River- 351 AM MDT Sat Sep 8 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MDT THIS EVENING FOR STRONG GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 410 AND 425... * AREAS AFFECTED...Fire weather zones 410 and 425. For zone 425, the most critical fire weather conditions are generally expected north and east of a line from Shoshone to Rupert. * WINDS...Southwest at 15 to 25 mph, with gusts up to 35 mph. * RELATIVE HUMIDITY...11 to 15 percent. * IMPACTS...Strong gusty winds and dry conditions could cause new or existing fires to spread rapidly. * Relative humidity at or below 15 percent and wind gusts of at least 30 mph in the Snake River plain. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on any one or more of these criteria for Southeastern Idaho: * Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. * Thunderstorm coverage of 25 percent, without specific rainfall criteria. * Other high impact events deemed critical by the National Weather Service and area fire management agencies. && Messick $$
319 WWUS85 KPIH 090246 RFWPIH URGENT - FIRE WEATHER MESSAGE National Weather Service Pocatello ID 846 PM MDT Sat Sep 8 2018 IDZ410-425-090400- /O.EXP.KPIH.FW.W.0013.000000T0000Z-180909T0300Z/ Upper Snake River Valley/Idaho Falls BLM- Middle Snake River Valley/Twin Falls BLM north of the Snake River- 846 PM MDT Sat Sep 8 2018 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 410 AND 425... Humidity is rising. Most areas outside of the Arco desert are above 15 percent now. Winds gusts outside of INL are below 30 mph and starting to taper off, particularly outside of the Arco desert. $$
Nearby
Red Flag Warnings in Idaho, 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.