Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 47, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Feb 7, 2017, 5:27 PM PST for Alameda County, California. It was in force for 2 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
- Feb 7, 2017, 5:27 PM PST (01:27 UTC)
- Expired
- Feb 7, 2017, 7:30 PM PST
- In force
- 2 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Alameda County, CA
The radar
The San Francisco radar (KMUX), 45 km from the middle of the area, began a volume at 01:31 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, 1.5 hours before the alert went out and 33 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
- 625 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 237 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
569
WGUS56 KMTR 080127
FFWMTR
CAC001-080330-
/O.NEW.KMTR.FF.W.0047.170208T0127Z-170208T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Francisco CA
527 PM PST TUE FEB 7 2017
The National Weather Service in The San Francisco Bay Area has issued
a
* Flash Flood Warning for...
South central Alameda County in northern California...
* Until 730 PM PST
* At 524 PM PST, the automated gauge at Alameda Creek near Niles is
receding, but remains near flood stage. The flash flood warning
has been extended through 7:30 pm PST.
Mud slides are still possible this evening, mud slides can consist
of rock, mud, vegetation and other loose materials.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3759 12187 3754 12184 3752 12182 3751 12179
3749 12174 3749 12177 3750 12181 3750 12183
3753 12186 3757 12188 3759 12191 3758 12194
3757 12196 3756 12199 3757 12203 3759 12202
3758 12200 3758 12198 3761 12195 3761 12190
$$1 follow-up statement
862
WGUS76 KMTR 080324
FFSMTR
Flash Flood Statement
National Weather Service San Francisco CA
724 PM PST TUE FEB 7 2017
CAC001-080333-
/O.EXP.KMTR.FF.W.0047.000000T0000Z-170208T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Alameda CA-
724 PM PST TUE FEB 7 2017
...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL ALAMEDA COUNTY WILL
EXPIRE AT 730 PM PST...
Flooding is no longer expected to pose a threat. The river level is
falling quickly and should be below flood stage shortly. Please
continue to heed any remaining road closures.
LAT...LON 3759 12187 3754 12184 3752 12182 3751 12179
3749 12174 3749 12177 3750 12181 3750 12183
3753 12186 3757 12188 3759 12191 3758 12194
3757 12196 3756 12199 3757 12203 3759 12202
3758 12200 3758 12198 3761 12195 3761 12190
$$The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 7, 5:13 PM PST | Areal Flood Warning | MTR | Monterey | 6 hr |
| Feb 8, 1:57 AM PST | Wind Advisory | MTR | Marin, Napa, San Mateo, Santa Clara, Santa Cruz, Sonoma | 38 hr |
| Feb 8, 2:23 AM PST | Small Craft Advisory | MTR | 43 hr | |
| Feb 8, 8:37 AM PST | Areal Flood Warning | MTR | Sonoma | 4 days |
| Feb 8, 9:18 AM PST | Flash Flood Watch | MTR | Marin, Monterey, Napa, San Mateo, Santa Clara, Santa Cruz and 1 more | 41 hr |
| Feb 8, 2:43 PM PST | Coastal Flood Warning | MTR | Marin, Monterey, City and County of San Francisco, San Mateo, Santa Cruz, Sonoma | 21 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.