Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 4, NWS Hanford, CA
NWS Hanford, CA issued this red flag warning at Oct 10, 2021, 1:22 PM PDT for 7 counties in California. It took effect at Oct 11, 2021, 8:00 AM PDT. It was in force for 15 hr. 18 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
- Oct 10, 2021, 1:22 PM PDT (20:22 UTC)
- In effect from
- Oct 11, 2021, 8:00 AM PDT
- Expired
- Oct 11, 2021, 11:00 PM PDT
- In force
- 15 hr
- Issued by
- NWS Hanford, CA
Counties Fresno County, CA, Kern County, CA, Kings County, CA, Madera County, CA, Mariposa County, CA, Merced County, CA, Tulare County, CA
The radar
The San Joaquin Valley radar (KHNX), 35 km from the middle of the area, began a volume at 20:23 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 |
|---|---|---|---|
| Oct 11, 9:20 AM PDT | NON-TSTM WND GST 70 | 9 E Lebec, CA | MESONET STATION 444SE SCE-3435. |
| Oct 11, 10:32 AM PDT | NON-TSTM WND GST 69 | 7 Wnw Indian Wells Vall, CA | MESONET STATION BMXC1 BLUE MAX. |
| Oct 11, 12:00 PM PDT | NON-TSTM WND GST 73 | 5 N Indian Wells Valley, CA | MESONET STATION SE447 GRAPEVINE CYN RD IWV (SCE). |
| Oct 11, 12:26 PM PDT | NON-TSTM WND GST 102 | 2 Nw Indian Wells Valle, CA | MESONET STATION IWLC1 INDIAN WELLS CANYON. |
| Oct 11, 1:06 PM PDT | NON-TSTM WND GST 61 | 1 S Red Rock Canyon, CA | MESONET STATION AU205 JAWBONE STATION. |
| Oct 11, 1:40 PM PDT | NON-TSTM WND GST 73 | 16 Ssw Tehachapi, CA | MESONET STATION SE283 LITTLE OAK CANYON (SCE). |
| Oct 11, 2:42 PM PDT | NON-TSTM WND GST 59 | 5 Nw Mojave, CA | MESONET STATION AU563 CACHE CREEK CHP ON 58. |
| Oct 11, 2:50 PM PDT | NON-TSTM WND GST 69 | 5 Nnw Mojave, CA | MESONET STATION SE377 CACHE CREEK (SCE). |
| Oct 11, 3:14 PM PDT | NON-TSTM WND GST 83 | 13 W Red Rock Canyon, CA | MESONET STATION JWBC1 JAWBONE CANYON. |
| Oct 11, 3:27 PM PDT | NON-TSTM WND GST 87 | 11 Se Weldon, CA | MESONET STATION BIJC1 BIRD SPRINGS PASS. |
| Oct 11, 3:50 PM PDT | NON-TSTM WND GST 58 | 3 Nnw Mountain Mesa, CA | MESONET STATION 458SE SCE-3411. |
| Oct 11, 4:00 PM PDT | NON-TSTM WND GST 69 | 9 Ese Oynx, CA | MESONET STATION ONYC1 WALKER PASS NR JACKS CREEK. |
| Oct 11, 4:10 PM PDT | NON-TSTM WND GST 67 | 8 S Kennedy Meadows, CA | MESONET STATION BPKC1 BEAR PEAK. |
| Oct 11, 5:00 PM PDT | NON-TSTM WND GST 58 | 6 E Tehachapi, CA | MESONET STATION SE058 TEHACHAPI EAST VALLEY. |
| Oct 11, 5:20 PM PDT | NON-TSTM WND GST 78 | 2 Ene Mojave, CA | AWOS STATION KMHV MOJAVE AIRPORT. |
| Oct 11, 5:40 PM PDT | NON-TSTM WND GST 58 | 1 Wnw Lebec, CA | MESONET STATION PG241 LEBEC 1W (PGE). |
| Oct 11, 8:50 PM PDT | NON-TSTM WND GST 61 | 3 E Avenal, CA | MESONET STATION KTLC1 KETTLEMAN HILLS. |
| Oct 11, 10:20 PM PDT | NON-TSTM WND GST 59 | 5 E Lebec, CA | MESONET STATION 437SE SCE-3410. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Vandenberg AFB, CA (KVBG), launched 12:00Z, 8.4 hours before the alert went out and 225 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
- 2799 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 4 m²/s²
- 0-3 km storm-relative helicity
- -22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
842 WWUS86 KHNX 102022 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 122 PM PDT Sun Oct 10 2021 ...RED FLAG WARNING FROM 8 AM TO 11 PM PDT MONDAY for the West Side Hills and the Central San Joaquin Valley... .A strong weather system will move southward through the Great Basin late tonight through Monday. Strong north to northwest winds will quickly increase Monday morning, especially over west side hills and along north sectors of the San Joaquin Valley. These strong gusty winds, combined with low humidity and dry fuels, may result in critical fire weather conditions. CAZ579-580-110515- /O.UPG.KHNX.FW.A.0004.211011T1500Z-211012T0600Z/ /O.NEW.KHNX.FW.W.0004.211011T1500Z-211012T0600Z/ West Side Hills-San Joaquin Valley- 122 PM PDT Sun Oct 10 2021 ...RED FLAG WARNING IN EFFECT FROM 8 AM TO 11 PM PDT MONDAY FOR STRONG NORTHERLY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 579 AND 580... The National Weather Service in Hanford has issued a Red Flag Warning, which is in effect from 8 AM to 11 PM PDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire weather zones 579 and 580, which includes the West Side Hills and the Northwest portion of the San Joaquin Valley. * WIND...North to Northwest wind gusts of 30 to 50 mph, will develop Monday morning and continue into Monday night across the Central SJ Valley and West side hills of the valley. Strongest winds are expected along the west side hills of the Valley on Monday afternoon. * HUMIDITY...Minimum humidity 15 to 25 percent. * HIGHEST THREAT...is located over the Diablo Mountain Range and west side foothills. * IMPACTS...Any fires that develop will likely 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 will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
4 follow-up statements
318 WWUS86 KHNX 110454 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 954 PM PDT Sun Oct 10 2021 ...RED FLAG WARNING FROM 8 AM TO 11 PM PDT MONDAY for the West Side Hills and the Central San Joaquin Valley... .A strong weather system will move southward through the Great Basin late tonight through Monday. Strong north to northwest winds will quickly increase Monday morning, especially over west side hills and along north sectors of the San Joaquin Valley. These strong gusty winds, combined with low humidity and dry fuels, may result in critical fire weather conditions. CAZ579-580-111300- /O.CON.KHNX.FW.W.0004.211011T1500Z-211012T0600Z/ West Side Hills-San Joaquin Valley- 954 PM PDT Sun Oct 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM TO 11 PM PDT MONDAY FOR STRONG NORTHERLY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONES 579 AND 580... * AFFECTED AREA...Fire weather zones 579 and 580, which includes the West Side Hills and the Northwest portion of the San Joaquin Valley. * WIND...North to Northwest wind gusts of 30 to 50 mph, will develop Monday morning and continue into Monday night across the Central SJ Valley and West side hills of the valley. Strongest winds are expected along the west side hills of the Valley on Monday afternoon. * HUMIDITY...Minimum humidity 15 to 25 percent. * HIGHEST THREAT...Diablo Mountain Range and west side foothills. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ DCH
552 WWUS86 KHNX 111230 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 530 AM PDT Mon Oct 11 2021 ...RED FLAG WARNING FROM 8 AM TO 11 PM PDT MONDAY for the West Side Hills and the Central San Joaquin Valley... .A strong weather system will continue to move southward through the Great Basin late through Monday. Strong north to northwest winds will quickly increase Monday morning, especially over west side hills and along north sectors of the San Joaquin Valley. These strong gusty winds, combined with low humidity and dry fuels, may result in critical fire weather conditions. CAZ579-580-112030- /O.CON.KHNX.FW.W.0004.211011T1500Z-211012T0600Z/ West Side Hills-San Joaquin Valley- 530 AM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR STRONG WINDS, DRY FUELS, AND LOWERED HUMIDITIES FOR FIRE WEATHER ZONES 579 AND 580... * AFFECTED AREA...Fire weather zones 579 and 580, which includes the West Side Hills and the Northwest portion of the San Joaquin Valley. * WIND...North to Northwest wind gusts of 30 to 50 mph, will develop Monday morning and continue into Monday night across the Central SJ Valley and West side hills of the valley. Strongest winds are expected along the west side hills of the Valley on Monday afternoon. * HUMIDITY...Minimum humidity 15 to 25 percent. * HIGHEST THREAT...Diablo Mountain Range and west side foothills. * IMPACTS...Any fires that develop will likely 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 will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Andersen
628 WWUS86 KHNX 112036 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 136 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING FROM 8 AM TO 11 PM PDT MONDAY for the West Side Hills and the Central San Joaquin Valley... .A strong weather system will continue to move southward through the Great Basin later tonight. The strong gusty winds, combined with low humidity and dry fuels, may result in critical fire weather conditions. CAZ579-580-120600- /O.CON.KHNX.FW.W.0004.000000T0000Z-211012T0600Z/ West Side Hills-San Joaquin Valley- 136 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR STRONG WINDS, DRY FUELS, AND LOWERED HUMIDITIES FOR FIRE WEATHER ZONES 579 AND 580... * AFFECTED AREA...Fire weather zones 579 and 580, which includes the West Side Hills and the Northwest portion of the San Joaquin Valley. * WIND...North to Northwest wind gusts of 30 to 50 mph, will continue into tonight across the Central SJ Valley and West side hills of the valley. Strongest winds are expected along the west side hills of the Valley on Monday afternoon. * HUMIDITY...Minimum humidity 15 to 25 percent. * HIGHEST THREAT...Diablo Mountain Range and west side foothills. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$ Molina
965 WWUS86 KHNX 120539 RFWHNX URGENT - FIRE WEATHER MESSAGE National Weather Service Hanford CA 1039 PM PDT Mon Oct 11 2021 CAZ579-580-120645- /O.EXP.KHNX.FW.W.0004.000000T0000Z-211012T0600Z/ West Side Hills-San Joaquin Valley- 1039 PM PDT Mon Oct 11 2021 ...RED FLAG WARNING WILL EXPIRE AT 11 PM PDT THIS EVENING FOR STRONG WINDS, DRY FUELS, AND LOWERED HUMIDITIES FOR FIRE WEATHER ZONES 579 AND 580... Relative humidity values are gradually increasing to 25 to 35 percent and winds have significantly decreased, so the Red Flag Warning has been allowed to expire. $$ JDB
The office that day
Everything else NWS Hanford, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 5:31 AM PDT | Wind Advisory | HNX | Fresno, Kern, Kings, Madera, Mariposa, Merced and 1 more | 41 hr |
| Oct 10, 1:15 PM PDT | High Wind Warning | HNX | Kern, Tulare | 34 hr |
Nearby
Red Flag Warnings in California, 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.