National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

Storm Summaries

The following studies detail the significant precipitation events that have occurred across southwest Oregon, California, and Nevada. These storm summaries have been compiled since events during the 2004-2005 winter season. Also, the two historic and memorable flooding events from February 1986 and January 1997 have now been added to this collection of documents.


2022 - 2023 Winter Season

NOAA logo  Section 1: Late December 2022 - January 2023
Location / Event: California and Nevada Heavy Precipitation Events
Authors: Holly Osborne, Anna Schneider, Mike Hittle, Mike Imgarten, Brad Moore, Brett Whitin, Alex Chen, Nate Patrick, Kyle Lerman, Dan Kozlowski, and Chad Hecht (CW3E)

NOAA logo  Section 2: Late February 2023 - March 2023
Location / Event: California and Nevada Heavy Precipitation Events
Authors: Holly Osborne, Anna Schneider, Mike Hittle, Mike Imgarten, Brad Moore, Brett Whitin, Alex Chen, Nate Patrick, Kyle Lerman, Dan Kozlowski, and Chad Hecht (CW3E)


2021 - 2022 Winter Season

NOAA logo  October 17, 2021 - October 26, 2021
Location / Event: California and Northern Nevada Heavy Precipitation Event
Authors: Anna Schneider, Holly Osborne, Kyle Lerman, and Dan Kozlowski


2016 - 2017 Winter Season

NOAA logo  January and February 2017
Location / Event: California and Northern Nevada Series of Significant Precipitation Events
Authors: Holly Osborne, Kyle Lerman, and Dan Kozlowski


2012 - 2013 Winter Season

NOAA logo  November 28, 2012 - December 03, 2012
Location / Event: Northern CA and Western NV Heavy Precipitation Event
Authors: Mike Ekern, Jamie Meier, Kyle Lerman, and Dan Kozlowski


2010 - 2011 Winter Season

NOAA logo  October 23, 2010 - October 25, 2010
Location / Event: Northern/Central CA and Northern NV Early-Season Heavy Precipitation Event
Authors: Dan Kozlowski, Kyle Lerman, and Mike Ekern

NOAA logo  December 16, 2010 - December 23, 2010
Location / Event: California and Nevada
Authors: Kyle Lerman, Mike Ekern, Dan Kozlowski, and Brett Whitin


2009 - 2010 Winter Season

NOAA logo  October 13, 2009 - October 14, 2009
Location / Event: Northern/Central CA and Western NV Early-Season Heavy Precipitation Event
Authors: Kyle Lerman, Mike Ekern, and Dan Kozlowski


2005 - 2006 Winter Season

NOAA logo  December 24, 2005 - January 03, 2006
Location / Event: Southwest OR, Northern CA, and Western NV Significant Precipitation Event
Authors: Dan Kozlowski and Mike Ekern

NOAA logo  April 02, 2006 - April 06, 2006
Location / Event: Southern Sierra Nevada and San Joaquin Valley Significant Precipitation Event
Authors: Dan Kozlowski and Mike Ekern


2004 - 2005 Winter Season

NOAA logo  January 07, 2005 - January 11, 2005
Location / Event: Southern California Significant Precipitation Event
Authors: Dan Kozlowski and Mike Ekern

NOAA logo  February 17, 2005 - February 23, 2005
Location / Event: Southern California Significant Precipitation Event
Authors: Dan Kozlowski and Mike Ekern

NOAA logo  May 17, 2005 - May 19, 2005
Location / Event: Northern California Significant Precipitation Event
Authors: Dan Kozlowski and Mike Ekern


1996 - 1997 Winter Season

NOAA logo  December 26, 1996 - January 03, 1997
Location / Event: Southwest OR, Northern CA, and Western NV Significant Precipitation Event
Authors: Dan Kozlowski and Mike Ekern


1985 - 1986 Winter Season

NOAA logo  February 11, 1986 - February 20, 1986
Location / Event: Northern and Central CA and Western NV Significant Precipitation Event
Authors: Jamie Meier, Mike Ekern, Kyle Lerman, and Dan Kozlowski