Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 9, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 8, 2017, 10:49 AM PST for Sonoma County, California. It was in force for 6 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 8, 2017, 10:49 AM PST (18:49 UTC)
- Expired
- Jan 8, 2017, 4:45 PM PST
- In force
- 6 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Sonoma County, CA
The radar
The Sacramento radar (KDAX), 81 km from the middle of the area, began a volume at 18:52 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 12:00Z, 6.8 hours before the alert went out and 59 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
- 607 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 463 m²/s²
- 0-3 km storm-relative helicity
- 874 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
022
WGUS56 KMTR 081849
FFWMTR
CAC097-082145-
/O.NEW.KMTR.FF.W.0009.170108T1849Z-170108T2145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Francisco CA
1049 AM PST SUN JAN 8 2017
The National Weather Service in The San Francisco Bay Area has issued
a
* Flash Flood Warning for...
Southeastern Sonoma County in northern California...
* Until 145 PM PST
* At 1048 AM PST, Doppler radar indicated additional moderate to
heavy rain at times over the warned area. Flash flooding is
already occurring.
* Some locations that will experience flooding include...
Petaluma.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3820 12245 3813 12243 3812 12248 3819 12256
3823 12267 3830 12262
$$2 follow-up statements
309
WGUS56 KMTR 082139 RRA
FFWMTR
CAC097-090045-
/O.EXT.KMTR.FF.W.0009.000000T0000Z-170109T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Francisco CA
139 PM PST SUN JAN 8 2017
The National Weather Service in The San Francisco Bay Area has
extended the
* Flash Flood Warning for...
Southeastern Sonoma County in northern California...
* Until 445 PM PST
* At 136 PM PST, although most of the heavy rainfall has ended in
the North Bay many local streams and creeks are currently above
flood stage and will take several hours to recede.
* Some locations that may continue experience flooding include...
Petaluma.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3820 12245 3813 12243 3812 12248 3819 12256
3823 12267 3830 12262
$$
Bell713
WGUS76 KMTR 090041
FFSMTR
Flash Flood Statement
National Weather Service San Francisco CA
441 PM PST SUN JAN 8 2017
CAC097-090050-
/O.EXP.KMTR.FF.W.0009.000000T0000Z-170109T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Sonoma CA-
441 PM PST SUN JAN 8 2017
...THE FLASH FLOOD WARNING FOR SOUTHEASTERN SONOMA COUNTY WILL EXPIRE
AT 445 PM PST...
The heavy rain has ended across Sonoma County. Additional flooding
is no longer expected. Please continue to heed any remaining road
closures.
LAT...LON 3820 12245 3813 12243 3812 12248 3819 12256
3823 12267 3830 12262
$$
BFGThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 7, 9:12 PM PST | River Flood Warning | MTR | Santa Clara | 25 hr |
| Jan 7, 9:12 PM PST | River Flood Warning | MTR | Napa | 35 hr |
| Jan 7, 11:23 PM PST | Special Marine Warning | MTR | 52 min | |
| Jan 7, 11:35 PM PST | River Flood Warning | MTR | Monterey | 24 hr |
| Jan 8, 12:16 AM PST | Flash Flood Warning | MTR | Santa Clara | 6 hr |
| Jan 8, 12:25 AM PST | Special Marine Warning | MTR | 35 min | |
| Jan 8, 12:49 AM PST | Special Weather Statement | MTR | Santa Cruz | 26 min |
| Jan 8, 1:05 AM PST | Areal Flood Advisory | MTR | Monterey, San Benito | 3 hr |
| Jan 8, 1:49 AM PST | Areal Flood Advisory | MTR | Contra Costa, Marin, Napa, City and County of San Francisco, San Mateo, Sonoma | 3 hr |
| Jan 8, 2:26 AM PST | Small Craft Advisory | MTR | 24 hr | |
| Jan 8, 3:26 AM PST | River Flood Warning | MTR | Napa | 32 hr |
| Jan 8, 3:26 AM PST | River Flood Warning | MTR | Sonoma | 5 days |
| Jan 8, 4:23 AM PST | Flash Flood Warning | MTR | Sonoma | 6 hr |
| Jan 8, 5:25 AM PST | Flash Flood Warning | MTR | Sonoma | 6 hr |
| Jan 8, 6:39 AM PST | Areal Flood Advisory | MTR | Marin, Napa, Sonoma | 3 hr |
| Jan 8, 9:58 AM PST | Areal Flood Advisory | MTR | Marin, Napa, Sonoma | 2 hr |
| Jan 8, 11:11 AM PST | Flash Flood Warning | MTR | Sonoma | 6 hr |
| Jan 8, 12:30 PM PST | Areal Flood Advisory | MTR | Marin, Napa, Sonoma | 3 hr |
| Jan 8, 12:45 PM PST | Areal Flood Advisory | MTR | Santa Cruz | 4 hr |
| Jan 8, 12:45 PM PST | Areal Flood Advisory | MTR | Santa Clara | 4 hr |
| Jan 8, 1:44 PM PST | Flash Flood Warning | MTR | Monterey | 4 hr |
| Jan 8, 1:58 PM PST | Flash Flood Warning | MTR | Santa Cruz | 3 hr |
Nearby
Flash Flood Warnings in California, 2017Every flash flood warning in 2017
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.