Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 8, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 8, 2017, 5:25 AM PST for Sonoma County, California. It was in force for 6 hr. 10 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jan 8, 2017, 5:25 AM PST (13:25 UTC)
- Expired
- Jan 8, 2017, 11:15 AM 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), 80 km from the middle of the area, began a volume at 13:25 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 |
|---|---|---|---|
| Jan 8, 6:29 AM PST | FLOOD | Santa Rosa, CA | SPOTTER REPORTED FLOODING AT SOUTH WINDSOR CREEK. |
| Jan 8, 7:21 AM PST | FLOOD | Santa Rosa, CA | FREEWAY SHUTDOWN AT HWY 101 N DUE TO FLOODING. |
| Jan 8, 7:22 AM PST | FLOOD | Sonoma, CA | ROHNERT PARK EXPWY/STONY POINT IN ROHNERT PARK FLOODED. ROAD CLOSURES IN EFFECT. |
| Jan 8, 7:31 AM PST | FLOOD | Santa Rosa, CA | SKILLMAN EAST OF LIBERTY IN PET IS FLOODED, NOT PASSABLE. |
| Jan 8, 7:31 AM PST | FLOOD | Santa Rosa, CA | TODD AT LLANO FLOODED IN SANTA ROSA. |
| Jan 8, 8:06 AM PST | FLOOD | Santa Rosa, CA | CALISTOGA RD WEST OF PORTER CREEK CLOSED DUE TO FLOODING. |
| Jan 8, 8:32 AM PST | FLOOD | Graton, CA | GRATON ROAD AT DYER IN GRATON CLOSED DUE TO FLOODING. |
| Jan 8, 9:17 AM PST | FLOOD | Santa Rosa, CA | CREEK FLOODING ROADWAY AT MARK WEST SPRINGS RD AND FOX HUNT LN. |
| Jan 8, 9:20 AM PST | FLOOD | Santa Rosa, CA | CREEK FLOODING ONTO ROADWAY AT MARK WEST SPRINGS ROAD AND FOX HUNT LANE NEAR SANTA ROSA. |
| Jan 8, 11:18 AM PST | FLOOD | Santa Rosa, CA | ROADWAY FLOODING REPORTED AT SKILLMAN LANE AND THOMPSON LANE. APPROXIMATELY 6 INCHES OF WATER ACROSS THE ROADWAY. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 1.4 hours before the alert went out and 71 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.
305
WGUS56 KMTR 081325
FFWMTR
CAC097-081915-
/O.NEW.KMTR.FF.W.0008.170108T1325Z-170108T1915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service San Francisco CA
525 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 1115 AM PST
* At 522 AM PST, Doppler radar and automated rain gauges indicated
heavy rain falling across the warned area. Stream gages in the
Laguna de Santa Rosa and the Sonoma Valley (Sonoma Creek) are
rising rapidly above monitor stage and will rise above flood
stage. Flash flooding is already occurring in some locations.
* Some locations that will experience flooding include...
Santa Rosa, Rohnert Park, Sonoma, Sebastopol, Cotati, Roseland,
Larkfield-Wikiup, Boyes Hot Springs, Forestville, Fetters Hot
Spring, Glen Ellen, Agua Caliente, Temelec, South Santa Rosa,
Eldridge, El Verano and Graton.
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 3840 12250 3816 12239 3816 12241 3815 12238
3814 12238 3814 12242 3832 12259 3832 12271
3836 12285 3850 12287 3853 12271
$$
MWSThe 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, 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, 10:49 AM PST | Flash Flood Warning | MTR | Sonoma | 6 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.