Alert archive / Nevada / Red Flag Warnings in 2020
Red Flag Warning 13, NWS Reno, NV
NWS Reno, NV issued this red flag warning at Jul 15, 2020, 9:33 AM PDT for Madera County, Mono County, California; Douglas County, Lyon County, Mineral County, Nevada. It took effect at Jul 16, 2020, 2:00 PM PDT. It was in force for 5 hr. 2 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
- Jul 15, 2020, 9:33 AM PDT (16:33 UTC)
- In effect from
- Jul 16, 2020, 2:00 PM PDT
- Expired
- Jul 16, 2020, 7:14 PM PDT
- In force
- 5 hr
- Issued by
- NWS Reno, NV
Counties Madera County, CA, Mono County, CA, Douglas County, NV, Lyon County, NV, Mineral County, NV
The radar
The Reno radar (KRGX), 161 km from the middle of the area, began a volume at 16:36 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 16, 3:35 PM PDT | TSTM WND GST 49 | Minden Airport, NV | AWOS STATION KMEV MINDEN. |
| Jul 16, 3:38 PM PDT | TSTM WND GST 50 | 5 Ese Gardnerville, NV | MESONET STATION FISN2 FISH SPRINGS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Reno, NV (KREV), launched 12:00Z, 4.6 hours before the alert went out and 162 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
- 3282 m above ground
- 0-6 km bulk shear
- 9 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
673 WWUS85 KREV 151633 RFWREV URGENT - FIRE WEATHER MESSAGE National Weather Service Reno NV 933 AM PDT Wed Jul 15 2020 CAZ274-NVZ421-161400- /O.UPG.KREV.FW.A.0013.200716T2100Z-200717T0400Z/ /O.NEW.KREV.FW.W.0013.200716T2100Z-200717T0400Z/ Southern Mono County- Southern Sierra Front including Alpine, Northern Mono, Southern Lyon, and Western Mineral Counties- 933 AM PDT Wed Jul 15 2020 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 9 PM PDT THURSDAY FOR THUNDERSTORMS AND STRONG OUTFLOW WINDS FOR SOUTHERN MONO COUNTY AND THE SOUTHERN SIERRA FRONT... The National Weather Service in Reno has issued a Red Flag Warning for thunderstorms and strong outflow winds, which is in effect from 2 PM to 9 PM PDT Thursday. The Fire Weather Watch is no longer in effect. * Changes...Fire Weather Watch Thursday has been upgraded to a Red Flag Warning. * Affected Area...Fire Zone 274 Southern Mono County, Fire Zone 421 Southern Sierra Front including Alpine, Northern Mono, Southern Lyon and and Western Mineral Counties. * Thunderstorms...Isolated thunderstorms this afternoon will become more scattered for Thursday afternoon and evening. Storms will be a hybrid mix of wet and dry, however with recent unusual low humidity, vegetation could be extra receptive to new lightning caused fire starts. * Outflow Winds...Outflow wind gusts up to 50 mph will be possible with any storms. * Confidence...Confidence with this scenario is medium-high. We are confident in the storms, but not sure just how many strikes outside the cores will occur. * Impacts...Lightning can create new fire starts and may combine with strong outflow winds to cause a fire to rapidly grow in size and intensity. These storms could also produce heavy rains directly under the cores, which could result in debris flows downstream of recent burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outdoor activities that can cause a spark near dry vegetation, such as yard work, target shooting, or campfires. Follow local fire restrictions. Check weather.gov/reno for updates and livingwithfire.info for preparedness tips. && $$ CAZ271-272-278-NVZ420-161400- /O.CON.KREV.FW.A.0013.200716T2100Z-200717T0400Z/ Western Lassen, Eastern Plumas, Eastern Sierra, and Eastern Nevada Counties-Greater Lake Tahoe Area-Eastern Lassen County- Northern Sierra Front including Carson City, Douglas, Storey, Southern Washoe, Western Lyon, and Far Southern Lassen Counties- 933 AM PDT Wed Jul 15 2020 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON THROUGH THURSDAY EVENING FOR THUNDERSTORMS AND STRONG OUTFLOW WINDS FOR THE LAKE TAHOE BASIN, SIERRA FRONT, AND THE EASTERN SIERRA... * Changes...None. * Affected Area...Fire Zone 271 Western Lassen, Eastern Plumas, Eastern Sierra, and Eastern Nevada Counties, Fire Zone 272 Greater Lake Tahoe Area, Fire Zone 278 Eastern Lassen County, Fire Zone 420 Northern Sierra Front including Carson City, Douglas, Storey, Southern Washoe, Western Lyon and and Far Southern Lassen Counties. * Thunderstorms...Isolated thunderstorms are forecast this afternoon and again Thursday afternoon with more coverage possible Thursday. Storms will be a hybrid mix of wet and dry, however with recent unusual low humidity, vegetation could be extra receptive to new lightning caused fire starts. * Outflow Winds...Outflow wind gusts up to 50 mph will be possible with any storms. * Confidence...Confidence with this scenario is medium. Thunderstorms coverage is still questionable, as well as just how wet or dry the storms will be. * Impacts...Lightning can create new fire starts and may combine with strong outflow winds to cause a fire to rapidly grow in size and intensity. These storms could also produce heavy rains directly under the cores, which could result in debris flows downstream of recent burn areas such as the Poeville and Numbers Fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outdoor activities that can cause a spark near dry vegetation, such as yard work, target shooting, or campfires. Follow local fire restrictions. Check weather.gov/reno for updates and livingwithfire.info for preparedness tips. && $$ http://weather.gov/reno
2 follow-up statements
907 WWUS85 KREV 161018 RFWREV URGENT - FIRE WEATHER MESSAGE National Weather Service Reno NV 318 AM PDT Thu Jul 16 2020 CAZ271-272-278-NVZ420-161130- /O.CAN.KREV.FW.A.0013.200716T2100Z-200717T0400Z/ Western Lassen, Eastern Plumas, Eastern Sierra, and Eastern Nevada Counties-Greater Lake Tahoe Area-Eastern Lassen County- Northern Sierra Front including Carson City, Douglas, Storey, Southern Washoe, Western Lyon, and Far Southern Lassen Counties- 318 AM PDT Thu Jul 16 2020 ...FIRE WEATHER WATCH IS CANCELLED FOR THUNDERSTORMS AND STRONG OUTFLOW WINDS FOR THE LAKE TAHOE BASIN, SIERRA FRONT, AND THE EASTERN SIERRA... The National Weather Service in Reno has cancelled the Fire Weather Watch. Isolated thunderstorms are expected today but not widespread enough to upgrade to a warning. $$ CAZ274-NVZ421-170400- /O.CON.KREV.FW.W.0013.200716T2100Z-200717T0400Z/ Southern Mono County- Southern Sierra Front including Alpine, Northern Mono, Southern Lyon, and Western Mineral Counties- 318 AM PDT Thu Jul 16 2020 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 9 PM PDT THIS EVENING FOR THUNDERSTORMS AND STRONG OUTFLOW WINDS FOR SOUTHERN MONO COUNTY AND THE SOUTHERN SIERRA FRONT... * Changes...none. * Affected Area...Fire Zone 274 Southern Mono County, Fire Zone 421 Southern Sierra Front including Alpine, Northern Mono, Southern Lyon and and Western Mineral Counties. * Thunderstorms...Isolated to scattered thunderstorms this afternoon and evening. Storms will be a hybrid mix of wet and dry. However, with recent unusually low humidity, vegetation could be extra receptive to new lightning caused fire starts. * Outflow Winds...Outflow wind gusts up to 50 mph will be possible with any storms. * Confidence...Confidence with this scenario is medium-high. We are confident in the storms but not sure just how many strikes outside cores will occur. * Impacts...Lightning can create new fire starts and may combine with strong outflow winds to cause a fire to rapidly grow in size and intensity. These storms could also produce heavy rains directly under the cores which could result in debris flows downstream of recent burn areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Avoid outdoor activities that can cause a spark near dry vegetation, such as yard work, target shooting, or campfires. Follow local fire restrictions. Check weather.gov/reno for updates and livingwithfire.info for preparedness tips. && $$ Hoon http://weather.gov/reno
129 WWUS85 KREV 170214 RFWREV URGENT - FIRE WEATHER MESSAGE National Weather Service Reno NV 714 PM PDT Thu Jul 16 2020 CAZ274-NVZ421-170315- /O.CAN.KREV.FW.W.0013.000000T0000Z-200717T0400Z/ Southern Mono County- Southern Sierra Front including Alpine, Northern Mono, Southern Lyon, and Western Mineral Counties- 714 PM PDT Thu Jul 16 2020 ...RED FLAG WARNING IS CANCELLED FOR THUNDERSTORMS AND STRONG OUTFLOW WINDS FOR SOUTHERN MONO COUNTY AND THE SOUTHERN SIERRA FRONT... The National Weather Service in Reno has cancelled the Red Flag Warning. The thunderstorm threat has ended for today other than a chance for outflow winds up to 40 mph. Scattered thunderstorms return tomorrow afternoon and evening but with more rain. Thus...isolated dry strikes are expected tomorrow which should be a less critical threat for new fire starts but could be a bigger flash flood threat. $$ http://weather.gov/reno
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 3:43 PM PDT | Special Weather Statement | REV | Alpine | 47 min |
Nearby
Red Flag Warnings in Nevada, 2020Red Flag Warnings in California, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.