Urban and Small Stream Flood Advisory

Urban and Small Stream Flood Advisory title=
Urban and Small Stream Flood Advisory
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Update by the County of Santa Barbara
8:00 p.m., March 10, 2018

The National Weather Service has issued an Urban and Small Stream Flood Advisory for Santa Barbara County, including the recent wildfire burn areas. The storm is still predicted to be below debris flow thresholds. No evacuations are required. Residents near creeks and water channels should be alert and move to high ground if at anytime they feel threatened. 

Below is the advisory from the National Weather Service:

The National Weather Service in OXNARD has issued a Urban and Small Stream Flood Advisory for...

Santa Barbara County in southwestern California...
San Luis Obispo County in southwestern California...
Including the Thomas, Whittier, and Alamo burn areas.

* Until 945 PM PST

* At 639 PM PST, Doppler radar indicated a band of moderate to locally heavy rain across western Santa Barbara and San Luis Obispo counties, which is expected to spread eastward across both 
counties. Rainfall rates between 0.20 and 0.40 inches per hour can be expected across portions of the advisory area this evening, with brief heavy downpours possible.

* Urban roadway flooding can be expected across the advisory area, including portions of Highways 101, 154, and 192. In addition, minor mud and debris flows will be possible across the Thomas,
Whittier, and Alamo burn areas.

* Some locations that could experience flooding include...Thomas, Whittier, and Alamo burn areas...Lompoc, Gaviota, Vandenberg, Goleta, Santa Barbara, Solvang, Montecito, and Carpinteria.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

A Flood Advisory means river or stream flows are elevated, or ponding of water in urban or other areas is occurring or is imminent.


Update by the County of Santa Barbara
2:00 p.m., March 10, 2018
 
Update on Storm System currently bringing rainfall to Santa Barbara County: NWS predictions for this storm have not changed. Rainfall rates are not expected to reach the threshold for debris flows and evacuations are not anticipated at this time. County officials will continue to monitor the forecast and will alert the public if the situation changes. For storm readiness information, interactive maps and to register to receive alerts, visit ReadySBC.org.
 

Update by the County of Santa Barbara
March 9, 2018

A storm system is expected to bring showers to Santa Barbara County beginning in the afternoon Saturday, March 10 and continuing into Sunday.

Predictions for the storm have not changed over the past 24 hours. No evacuations are anticipated at this time.

“While all indication is that this storm will not meet the thresholds for debris flow, we are now monitoring a storm for the later part of next week,” said Rob Lewin, Director of the Santa Barbara County Office of Emergency Management.

The County of Santa Barbara thanks the community for staying alert and connected. To register to receive emergency alerts through the countywide Aware and Prepare system and to access storm readiness information, please visit the Ready Santa Barbara County website at http://ReadySBC.org/.


Update by the County of Santa Barbara
March 8, 2018
 
The County, emergency agencies and the National Weather Service continue to monitor a storm system heading toward Santa Barbara County.  Showers are expected in the region beginning late afternoon Saturday, March 10 and continuing into Sunday. No evacuations are anticipated at this time.

At present, the National Weather Service is reporting an expected maximum rainfall of approximately 0.8 to 1.6 inches total in foothills and mountains with intensity levels expected to be 0.2 to 0.4 inches per hour. There is a 20 percent chance that the intensity level will exceed the threshold of a half-inch of rain per hour that triggers debris flows. No thunderstorms are expected during the storm.

Emergency officials are actively monitoring the storm and will take the steps necessary to inform the public if the storm increases in intensity. Residents and businesses are asked to monitor weather reports and emergency announcements. For weather updates, visit www.weather.gov and enter a city or zip code for local forecasts.

Persons living in or near burn areas are encouraged to have emergency kits and evacuation plans ready in advance. For storm readiness tips, visit www.ReadySBC.org.

Storm readiness information is also available in Spanish at www.ReadySBC.org/es


Source: County of Santa Barbara
March 7, 2018

The County, emergency agencies and the National Weather Service continue to monitor a storm system heading toward Santa Barbara County. Showers are expected in the region beginning Saturday, March 10 late afternoon into Sunday.

At this time, the National Weather Service is reporting an expected maximum rainfall of approximately 0.25 to 0.75 inches total with intensity levels expected of 0.2 to 0.35 inches per hour. This amount is slightly below the threshold of 0.5 inches of rain per hour that activates evacuations warnings and orders near burn areas.

No evacuations are anticipated at this time. Emergency officials are actively monitoring the storm and will take the steps necessary to inform the public if the storm increases in intensity. Residents and businesses must monitor weather reports and emergency announcements. Local officials will provide periodic updates as the storm system develops.

For storm readiness information or to register to receive emergency alerts through the countywide Aware and Prepare system, please visit www.ReadySBC.org.

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11 Comments

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John Wiley Mar 10, 2018 09:27 PM
Urban and Small Stream Flood Advisory

Ventura and Santa Paula below the burn area got some moderate rain, but none that looks heavy as what went though here tonight. Guess we may not know until morning or maybe the 10 & 11pm TV reports.

John Wiley Mar 10, 2018 09:24 PM
Urban and Small Stream Flood Advisory

On the current radar the rain went more West and didn't seem to hit the mountain again. The 3 hour rain gauges hadn't moved at all as of a few minutes ago. Looks like we've dodged the bullet unless someone has on-scene reports to the contrary.

two abbys Mar 10, 2018 08:18 PM
Urban and Small Stream Flood Advisory

Here's the link. https://rain.cosbpw.net/map/?sensor_class=10|60&view=8bc6e88f-eeab-4281-9d92-3d723016e945

two abbys Mar 10, 2018 08:17 PM
Urban and Small Stream Flood Advisory

The County Water Agency website notes that 0.47 inches of rain fell in the past hour at the KTYD rain gauge up on Gibraltar Road just west of the burn area...

a-1552931452 Mar 10, 2018 07:52 PM
Urban and Small Stream Flood Advisory

John Wiley, I think something is wrong with the County sensors for measuring rain. Are they depending on these? They all say 0.01, for several I checked: GWD at Hollister/Puente. Cater, San Roque. East Camino Cielo. Montecito . From this site --- http://santabarbara.onerain.com/list.php

macpuzl Mar 10, 2018 08:08 PM
Urban and Small Stream Flood Advisory

What seems to be going on is that the list.php URL only shows the rain increment within the last few minutes. The longer URL below shows the last 48 hours.

macpuzl Mar 10, 2018 07:58 PM
Urban and Small Stream Flood Advisory

That URL does seem to be buggy. Try this view, where Cater was 0.9 when I looked: http://santabarbara.onerain.com/map/?sensor_class=10%7C2880&view=8bc6e88f-eeab-4281-9d92-3d723016e945

John Wiley Mar 10, 2018 07:43 PM
Urban and Small Stream Flood Advisory

I've put an aviation radar image on SBitZ.NET but won't be able to monitor, so hopefully others can. Still raining pretty solid here 154@101 and probably much harder up on the ridge. Any reports will be helpful for everyone. How are the streams looking? Hardest rain here lasted about 10 minutes.

John Wiley Mar 10, 2018 07:23 PM
Urban and Small Stream Flood Advisory

Heads up folks. Heavy rain 101@154 7:20 with heavier returns showing on radar along the ridge. Could be a debris event coming.

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