Alert archive / California / Flash Flood Warnings in 2016
Flash Flood Warning 18, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Dec 15, 2016, 4:13 PM PST for Marin 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
- Dec 15, 2016, 4:13 PM PST (00:13 UTC)
- Expired
- Dec 15, 2016, 7:15 PM PST
- In force
- 3 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Marin County, CA
The radar
The Sacramento radar (KDAX), 97 km from the middle of the area, began a volume at 00:17 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, 0.2 hours before the alert went out and 40 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
- 3 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 436 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 336 m²/s²
- 0-3 km storm-relative helicity
- 481 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
330
WGUS56 KMTR 160013
FFWMTR
CAC041-160315-
/O.NEW.KMTR.FF.W.0018.161216T0013Z-161216T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Francisco CA
413 PM PST THU DEC 15 2016
The National Weather Service in The San Francisco Bay Area has issued
a
* Flash Flood Warning for...
Corte Madera Creek in Marin County in northern California...
* Until 715 PM PST
* At 411 PM PST, Doppler radar and automated rain gauges indicated
heavy rain falling across the warned area. Flash flooding is
expected to begin shortly.
Recent stream stage levels at the Corte Madera Creek at Ross stream
gage indicate water levels 1 to 1.5 feet below flood stage and
rising rapidly. Heavy rain is still occurring in this watershed.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 3795 12251 3793 12250 3791 12251 3800 12263
3801 12262 3798 12255
$$
MWS2 follow-up statements
475
WGUS76 KMTR 160100
FFSMTR
Flash Flood Statement
National Weather Service San Francisco CA
500 PM PST THU DEC 15 2016
CAC041-160315-
/O.CON.KMTR.FF.W.0018.000000T0000Z-161216T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Marin CA-
500 PM PST THU DEC 15 2016
...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM PST FOR
EAST CENTRAL MARIN COUNTY...
At 459 PM PST, Doppler radar and automated rain gauges indicated that
heavy rain was falling over the area. Flash flooding is expected to
begin shortly.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3795 12251 3793 12250 3791 12251 3800 12263
3801 12262 3798 12255
$$
rww295
WGUS76 KMTR 160313
FFSMTR
Flash Flood Statement
National Weather Service San Francisco CA
713 PM PST THU DEC 15 2016
CAC041-160323-
/O.EXP.KMTR.FF.W.0018.000000T0000Z-161216T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Marin CA-
713 PM PST THU DEC 15 2016
...THE FLASH FLOOD WARNING FOR EAST CENTRAL MARIN COUNTY WILL EXPIRE
AT 715 PM PST...
The heavy rain is ending. Flood waters are receding. Please continue
to heed any remaining road closures.
LAT...LON 3795 12251 3793 12250 3791 12251 3800 12263
3801 12262 3798 12255
$$
rwwThe office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 15, 4:16 PM PST | Areal Flood Advisory | MTR | Marin, Napa, Sonoma | 3 hr |
| Dec 15, 4:58 PM PST | Areal Flood Advisory | MTR | Santa Clara, Santa Cruz | 4 hr |
| Dec 15, 5:08 PM PST | Flash Flood Warning | MTR | Marin, Sonoma | 3 hr |
| Dec 15, 5:27 PM PST | Areal Flood Advisory | MTR | San Mateo, Santa Cruz | 3 hr |
| Dec 15, 5:29 PM PST | Flash Flood Warning | MTR | Santa Clara | 46 min |
| Dec 15, 5:46 PM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa | 3 hr |
| Dec 15, 6:12 PM PST | Flash Flood Warning | MTR | Santa Clara | 3 hr |
| Dec 15, 6:16 PM PST | Flash Flood Warning | MTR | Monterey | 6 hr |
| Dec 15, 6:38 PM PST | Flash Flood Warning | MTR | San Mateo, Santa Clara, Santa Cruz | 4 hr |
| Dec 15, 7:20 PM PST | Areal Flood Advisory | MTR | Monterey, San Benito | 3 hr |
| Dec 15, 9:02 PM PST | Small Craft Advisory | MTR | 48 hr | |
| Dec 16, 2:43 AM PST | Small Craft Advisory | MTR | 18 hr | |
| Dec 16, 7:14 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Monterey, San Mateo, Santa Clara, Santa Cruz | 25 hr |
| Dec 16, 7:14 AM PST | Frost Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, City and County of San Francisco, San Mateo and 3 more | 49 hr |
| Dec 16, 7:14 AM PST | Freeze Warning | MTR | Marin, Napa, Sonoma | 25 hr |
| Dec 16, 7:14 AM PST | Freeze Warning | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 49 hr |
Nearby
Flash Flood Warnings in California, 2016Every flash flood warning in 2016
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.