Alert archive / California / Flash Flood Warnings in 2017
Flash Flood Warning 3, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this flash flood warning at Jan 4, 2017, 3:53 AM PST for Santa Cruz 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 4, 2017, 3:53 AM PST (11:53 UTC)
- Expired
- Jan 4, 2017, 6:45 AM PST
- In force
- 3 hr
- Issued by
- NWS San Francisco Bay Area, CA
- Area
- Storm-based polygon
- Flood severity
- None
County Santa Cruz County, CA
The radar
The San Francisco radar (KMUX), 20 km from the middle of the area, began a volume at 11:55 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, 11.9 hours before the alert went out and 78 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
- 707 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 335 m²/s²
- 0-3 km storm-relative helicity
- 696 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
168 WGUS56 KMTR 041153 FFWMTR CAC087-041445- /O.NEW.KMTR.FF.W.0003.170104T1153Z-170104T1445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service San Francisco CA 353 AM PST WED JAN 4 2017 The National Weather Service in The San Francisco Bay Area has issued a * Flash Flood Warning for... Central Santa Cruz County in northern California... * Until 645 AM PST * At 351 AM PST, Doppler radar indicated additional rainfall was likely to fall over the San Lorenzo River area. The gauge at Big Trees has hit a critical level over the past few hours and could see additional rises. * Some locations that will experience flooding include... Scotts Valley and Felton. LAT...LON 3701 12206 3704 12210 3707 12207 3704 12203 $$
2 follow-up statements
331 WGUS76 KMTR 041349 FFSMTR Flash Flood Statement National Weather Service San Francisco CA 549 AM PST WED JAN 4 2017 CAC087-041445- /O.CON.KMTR.FF.W.0003.000000T0000Z-170104T1445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Santa Cruz CA- 549 AM PST WED JAN 4 2017 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 AM PST FOR CENTRAL SANTA CRUZ COUNTY... Although the San Lorenzo River gauge at Big Trees is now around minor flood level, there may be local flooding over the next hour until the river recedes to lower values. Some locations that will experience flooding include... Scotts Valley and Felton. LAT...LON 3701 12206 3704 12210 3707 12207 3704 12203 $$
717 WGUS76 KMTR 041436 FFSMTR Flash Flood Statement National Weather Service San Francisco CA 636 AM PST WED JAN 4 2017 CAC087-041445- /O.EXP.KMTR.FF.W.0003.000000T0000Z-170104T1445Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Santa Cruz CA- 636 AM PST WED JAN 4 2017 ...THE FLASH FLOOD WARNING FOR CENTRAL SANTA CRUZ COUNTY WILL EXPIRE AT 645 AM PST... The heavy rain has ended. Flooding is no longer expected to pose a threat. Please continue to heed any remaining road closures. LAT...LON 3701 12206 3704 12210 3707 12207 3704 12203 $$ rww
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 3, 5:31 PM PST | Areal Flood Warning | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 6 hr |
| Jan 3, 5:43 PM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 12 hr |
| Jan 4, 1:08 AM PST | Flash Flood Warning | MTR | Santa Cruz | 3 hr |
| Jan 4, 2:35 AM PST | Small Craft Advisory | MTR | 6 hr | |
| Jan 4, 3:41 AM PST | Flash Flood Warning | MTR | Sonoma | 4 hr |
| Jan 4, 4:40 AM PST | Flash Flood Warning | MTR | Monterey | 6 hr |
| Jan 4, 3:30 PM PST | Flash Flood Warning | MTR | Santa Clara | 2 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.