Archived Radar Coded Message (RCM) Data Maps
Radar Coded Message (RCM) summaries are composites of high resolution CONUS NEXRAD reflectivity data that have been mapped to 10-km gridded resolution. This process loses some detail, but it still provides much finer resolution than previous Manually Digitized Radar (MDR) report-based maps. RCM reports also are provided every half-hour compared to the hourly frequency of previous MDR reports. Besides reflectivity, they also provide additional products that reflect the operational status and modes of the radar sites. They also can provide some additional information on the echoes, such as movement, tops, and associated severe weather. This site provides data starting on 1 January 2002 at 0015Z through 2 March 2022 at 1545Z at which time NWS apparently stopped transmission of these products. RCM data transmission resumed on 18 July 2022 at 1745Z and the data are available here, but these data now often seem very incomplete with no data from many sites/times and essentially stopped being transmitted at the start of 2023. Use any more recent data cautiously.

Select a region or center location(and zoom factor), type, date/time, county option, size, and type of page output for the map.

Region:	Type:	Date/Time:	County Outlines:	Map Size:	Web/Print:
Contiguous US New Hampshire New England Northeast Mid-Atlantic Southeast Midwest Southern Plains Northwest Southwest	Radar Summary Speed (kts) Direction Echo Tops Site Max. Tops Tornado Vortex Signature (if any) Mesocyclone (if any) Hail (if any) Precip/Clear Mode (P,C) Site Status (NA,NE,OM) City IDs	2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 0015 Z 0045 Z 0115 Z 0145 Z 0215 Z 0245 Z 0315 Z 0345 Z 0415 Z 0445 Z 0515 Z 0545 Z 0615 Z 0645 Z 0715 Z 0745 Z 0815 Z 0845 Z 0915 Z 0945 Z 1015 Z 1045 Z 1115 Z 1145 Z 1215 Z 1245 Z 1315 Z 1345 Z 1415 Z 1445 Z 1515 Z 1545 Z 1615 Z 1645 Z 1715 Z 1745 Z 1815 Z 1845 Z 1915 Z 1945 Z 2015 Z 2045 Z 2115 Z 2145 Z 2215 Z 2245 Z 2315 Z 2345 Z	No counties Show counties	640x480 800x600 912x650 1024x768	Web Page Print Only

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Notes:

• Archived RCM radar data only go back to February 11, 2002.
• RCM data maps are more detailed than corresponding MDR maps.