Alert archive / California / River Flood Warnings in 2017
River Flood Warning 18, NWS Sacramento, CA
NWS Sacramento, CA issued this river flood warning at Feb 6, 2017, 9:02 AM PST for Amador County, El Dorado County, Sacramento County, California. It took effect at Feb 7, 2017, 5:33 AM PST. It was in force for 22 hr.
The area
The counties it named.
The facts
- Issued
- Feb 6, 2017, 9:02 AM PST (17:02 UTC)
- In effect from
- Feb 7, 2017, 5:33 AM PST
- Expired
- Feb 8, 2017, 3:06 AM PST
- In force
- 22 hr
- Issued by
- NWS Sacramento, CA
- Area
- Storm-based polygon
- Flood severity
- Minor
Counties Amador County, CA, El Dorado County, CA, Sacramento County, CA
The radar
The Sacramento radar (KDAX), 73 km from the middle of the area, began a volume at 17:02 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 river
Written for the forecast point Cosumnes River at Michigan Bar (MHBC1).
- Action stage
- 7 ft
- Minor stage
- 12 ft
- Moderate stage
- 16 ft
- Major stage
- 18 ft
This gauge today: stage, forecast and historic crests
Stage from the USGS instantaneous record for site 11335000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.
What forecasters said that day
The local office's own words before this river flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sacramento, CA wrote its last area forecast discussion before this river flood warning went out at Feb 6, 4:49 AM PST, 4 hours 13 minutes earlier.
Area forecast discussion, Feb 6, 4:49 AM PST, 4 hours 13 minutes before
Area Forecast Discussion National Weather Service Sacramento CA 449 AM PST Mon Feb 6 2017 .Synopsis... Series of Pacific storms will bring periods of moderate to heavy rain and mountain snow with strong wind to Interior Northern California this week. && .Discussion... Storm #1 1 is beginning to decrease early this morning as precipitation has turned showery across the lower elevations with rain and high-elevation snow continuing across the northern Sierra. Caltrans traffic cameras continue to show heavy snow along I-80 over Donner Pass. Winds have been trending lower the past several hours as pressure gradients relax a bit, and this morning's wind advisory has been dropped for areas south of Yuba City. Storm #2 moves in later today and this evening with increasingly strong lift and deeper moisture generating moderate to heavy precipitation. Precip forecast to become more focused along and south the I-80 corridor by Tuesday morning. QPF amounts of 1.5-2.5 inches will be possible in the Central Valley while amounts of 4-8 inches will be possible in the foothills and west slopes of the northern Sierra by Tuesday evening. Flood watch has been issued to address potential for flooding of rivers and streams draining the west slopes, and for flood prone areas of the valley. Heavy snow and strong winds will continue in the northern Sierra, but snow levels will steadily rise on Tuesday and are forecast to be above the pass levels by Tuesday afternoon. In addition to the heavy precipitation, winds will increase again later this evening as continue into midday Tuesday. Surface pressure gradient forecast to reach 17 mbs from Fresno to Redding early Tuesday and gusts of around 50 mph will be possible in the valley and foothills. Warm-advection likely to continue lighter precip across the region Wednesday, then storm #3 is forecast to bring an increase in rain again on Thursday. && .EXTENDED DISCUSSION (Friday THROUGH Monday) The second storm this week is expected to arrive on Thursday. This system will bring another round of high precipitation rates, particularly over the mountains. With snow levels initially forecast to be over 8000 feet, a high amount of runoff will also be expected with this storm. One saving grace is that this system is currently forecast to move through the region a bit quicker than the Tuesday storm. That being said, flooding concerns will continue through this storm as water levels will already be running high. Snow levels will be dropping on Friday as the cold front passes through. Expect snow levels to drop down to 5000 ft or possibly lower, with heavy snow expected above those levels. Drier weather will begin on Saturday and continue through the weekend as high pressure builds across the region. Dang && .AVIATION... VFR/MVFR conditions expected across Valley terminals today with off-and-on rain showers. IFR/LIFR conditions continue over the mountains. South wind gusts 40-45 kt across the Valley will weaken this afternoon. The next round of heavy precipitation arrives Monday night, with south wind gusts up to 45 kt possible again. Dang && .STO WATCHES/WARNINGS/ADVISORIES... Flood Watch from this evening through Wednesday afternoon for Carquinez Strait and Delta-Central Sacramento Valley-Motherlode- Northeast Foothills/Sacramento Valley-Northern San Joaquin Valley-Southern Sacramento Valley-West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. Winter Storm Warning until 4 PM PST Tuesday for West Slope Northern Sierra Nevada-Western Plumas County/Lassen Park. Wind Advisory until noon PST today for Carquinez Strait and Delta-Central Sacramento Valley-Clear Lake/Southern Lake County- Motherlode-Mountains Southwestern Shasta County to Northern Lake County-Northeast Foothills/Sacramento Valley-Northern Sacramento Valley-Northern San Joaquin Valley-Shasta Lake Area / Northern Shasta County-Southern Sacramento Valley. &&
In the hours before
Local storm report, Feb 6, 7:25 AM PST, 1 hour 37 minutes before
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</html>Local storm report, Feb 6, 8:55 AM PST, 7 minutes before
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<h1 id="headline">This service is currently unavailable.</h1>
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The site you requested is temporarily down for maintenance or an unexpected outage.
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Please try again in a few minutes.
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</html>The office that day
Everything else NWS Sacramento, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 6, 3:40 AM PST | Wind Advisory | STO | 32 hr | |
| Feb 6, 4:05 AM PST | Flood Watch | STO | 29 hr | |
| Feb 6, 12:27 PM PST | Areal Flood Advisory | STO | Shasta | 9 hr |
| Feb 6, 2:13 PM PST | River Flood Warning | STO | Tehama | 25 days |
| Feb 6, 2:53 PM PST | River Flood Warning | STO | Solano, Yolo | 24 days |
Nearby
River Flood Warnings in California, 2017Every river 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.