The tables below show the date and times when NIST Radio Stations WWV and WWVH were off the air. During normal operation the signals are available 24 hours per day, 7 days a week. The tables list all outages since January 1, 2000 that lasted for more than 5 minutes.

Date	MJD	Began (UTC)	Ended (UTC)	Frequency
01-01-2009	54832	0504	0615	2.5, 5, 10, 15, 20 MHz
01-22-2008	54487	1735	2100	2.5 MHz
09-18-2007	54361	1502	1534	2.5, 5, 10, 15, 20 MHz
06-17-2007	54268	----	0056	2.5, 5, 10, 15, 20 MHz
06-16-2007	52267	2154	----	2.5, 5, 10, 15, 20 MHz
05-07-2007	54227	1544	2149	2.5, 5, 10, 15, 20 MHz
11-01-2004	53310	0340	0440	20 MHz
12-01-2003	52974	2126	2131	10 MHz
12-01-2003	52974	2126	2131	5 MHz
09-22-2002	52539	0640	0725	20 MHz
11-19-2001	52232	---	1600	10 MHz
11-17-2001	52230	2200	---	10 MHz
10-13-2001	52195	1835	1910	5 MHz
11-03-2000	51851	0700	1400	20 MHz
09-24-2000	51811	1010	1105	10 MHz
06-26-2000	51721	2315	2340	20 MHz
01-18-2000	51551	0000	1400	20 MHz

Date	MJD	Began (UTC)	Ended (UTC)	Frequency
08-21-2008	54699	1935	2003	15 MHz
01-30-2007	54130	0809	0907	10 MHz
01-16-2007	54116	2034	2048	10 MHz
01-16-2007	54116	0740	1703	10 MHz
04-03-2006	53828	0303	0308	5 MHz
02-07-2006	53773	1612	1731	5 MHz
11-10-2005	53684	1534	1540	5 MHz
01-15-2004	53019	2300	2306	2.5 MHz
08-08-2003	52859	1311	1542	2.5 MHz