Alert archive / California / Flash Flood Warnings in 2021
Flash Flood Warning 10, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 27, 2021, 7:02 PM PST for Monterey County, California. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jan 27, 2021, 7:02 PM PST (03:02 UTC)
- Expired
- Jan 27, 2021, 10:00 PM PST
- In force
- 3 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Monterey County, CA
The radar
The San Francisco radar (KMUX), 84 km from the middle of the area, began a volume at 03:02 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
Oakland, CA (KOAK), launched 00:00Z, 3.0 hours before the alert went out and 153 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
- 685 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 236 m²/s²
- 0-3 km storm-relative helicity
- 163 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
827
WGUS56 KMTR 280302
FFWMTR
CAC053-280600-
/O.NEW.KMTR.FF.W.0010.210128T0302Z-210128T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Francisco CA
702 PM PST Wed Jan 27 2021
The National Weather Service in San Francisco has issued a
* Flash Flood Warning for...
The Carmel Fire burn area in...
Northwestern Monterey County in central California...
* Until 1000 PM PST.
* At 702 PM PST, Doppler radar and automated rain gauges indicated
heavy rain falling over the Carmel Fire Burn Area. From 0.5 to
0.75 inches of rain have fallen during the past hour. Flash
flooding is expected to begin shortly.
Excessive rainfall over the burn area will result in debris flow
moving through the Carmel Fire burn area. The debris flow can
consist of rock, mud, vegetation and other loose materials.
HAZARD...Life threatening flash flooding. Heavy rain producing
flash flooding in and around the Carmel Fire Burn
Area.
SOURCE...Doppler radar and automated gauges.
IMPACT...Life threatening flash flooding of areas in and around
the Carmel Fire Burn Area.
* Some locations that will experience flash flooding include...
Carmel Valley Village and San Clemente Dam.
This is a life threatening situation for people in or near the
Carmel Fire burn area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Move away from recently burned areas. Life-threatening flooding of
creeks, roads and normally dry arroyos is likely. The heavy rains
will likely trigger rockslides, mudslides and debris flows in steep
terrain, especially in and around these areas.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
This is a life-threatening situation. If you observe movement of
soils move to higher ground immediately.
&&
LAT...LON 3643 12162 3639 12159 3639 12163 3640 12164
3640 12165 3641 12165 3641 12167 3642 12168
3641 12168 3642 12170 3642 12171 3643 12172
3644 12171 3644 12172 3645 12172 3645 12170
3644 12169 3644 12168
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...0.5-1 INCH IN 1 HOUR
$$
Dykema1 follow-up statement
427
WGUS76 KMTR 280551
FFSMTR
Flash Flood Statement
National Weather Service San Francisco CA
951 PM PST Wed Jan 27 2021
CAC053-280601-
/O.EXP.KMTR.FF.W.0010.000000T0000Z-210128T0600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Monterey CA-
951 PM PST Wed Jan 27 2021
...FLASH FLOOD WARNING FOR THE CARMEL FIRE BURN AREA WILL EXPIRE AT
10 PM PST THIS EVENING FOR NORTHWESTERN MONTEREY COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Additional rain showers are possible through Thursday.
Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 400 PM PST Thursday for
a portion of western California.
LAT...LON 3643 12162 3639 12159 3639 12163 3640 12164
3640 12165 3641 12165 3641 12167 3642 12168
3641 12168 3642 12170 3642 12171 3643 12172
3644 12171 3644 12172 3645 12172 3645 12170
3644 12169 3644 12168
$$
MMThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 27, 4:02 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito | 3 hr |
| Jan 27, 4:19 PM PST | Flash Flood Warning | MTR | Monterey | 5 hr |
| Jan 27, 5:28 PM PST | Small Craft Advisory | MTR | 22 hr | |
| Jan 27, 7:05 PM PST | Flash Flood Warning | MTR | Monterey | 3 hr |
| Jan 27, 7:32 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 3 hr |
| Jan 27, 10:39 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 4 hr |
| Jan 28, 4:33 AM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 11 hr |
| Jan 28, 4:59 AM PST | Areal Flood Warning | MTR | Monterey | 9 hr |
Nearby
Flash Flood Warnings in California, 2021Every flash flood 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.