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

Freezing Levels

The text and graphical products below display instantaneous freezing level data for each synoptic 6-hour (00, 06, 12 and 18 UTC) for the next 5 days across the CNRFC area of responsibility. In most cases, this freezing level forecasts are converted into basin Mean Areal Freezing Level (MAZ) and serve as input into our hydrologic models.

Freezing Level images are issued daily at 8:00 AM. During CNRFC winter operations (Oct 15 - Apr 15), images are updated again at 1:30 PM daily with additional issuances as needed during extended hours of operation.


CNRFC Freezing Level Summary - Google™ Maps Interface

CNRFC observed and forecast freezing level grids are available on a Google™ Maps Interface in 6-hourly increments. Observed grids are updated once daily in the morning, while forecast grids are updated as described above in the description of Freezing Level images. In addition, KML files are available for download and use in Google™ Earth.

    Freezing Levels - Google™ Maps Interface


CNRFC Text Freezing Level Products

Product
 Description
6-Hour Basin QPF and Freezing Levels for Days 1 through 3
[Key to Basin Name Abbreviations]
6-Hour Basin QPF and Freezing Levels for Days 4 through 6
[Key to Basin Name Abbreviations]
6-Hour Point QPF and Freezing Levels for Days 1 through 3
[Key to Point QPF Name Abbreviations]
6-Hour Point QPF and Freezing Levels for Days 4 through 6
[Key to Point QPF Name Abbreviations]
24-Hour Basin QPF and Freezing Levels for Days 1 through 6
[Key to Basin Name Abbreviations]
24-Hour Observed Basin Precipitation and next 24-Hour QPF/Freezing Levels

CNRFC Graphical Freezing Level Products

 Entire CNRFC Area - Forecast
Day 1 Day 2 Day 3
12Z
(4am)
18Z
(10am)
00Z
(4pm)
06Z
(10pm)
12Z
(4am)
18Z
(10am)
00Z
(4pm)
06Z
(10pm)
12Z
(4am)
18Z
(10am)
00Z
(4pm)
06Z
(10pm)
Day 4 Day 5 Day 6
12Z
(4am)
18Z
(10am)
00Z
(4pm)
06Z
(10pm)
12Z
(4am)
18Z
(10am)
00Z
(4pm)
06Z
(10pm)
12Z
(4am)
     

 Entire CNRFC Area - Observed
Day 1
12Z  (4am) 18Z  (10am) 00Z  (4pm) 06Z  (10pm)