Nexrad Maps
Base Reflectivity
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ABR - Aberdeen, SD Nexrad Map ABX - Albuquerque, NM Nexrad Map AHG - Anchorage, AK Nexrad Map AIH - Middleton is, AK Nexrad Map AKQ - Wakefield, VA Nexrad Map AMA - Amarillo, TX Nexrad Map AMX - Miami, FL Nexrad Map APD - Fairbanks, AK Nexrad Map APX - Alpena, MI Nexrad Map ARX - La Crosse, WI Nexrad Map ATX - Seattle, WA Nexrad Map BBX - Beale AFB, CA Nexrad Map BGM - Binghamton, NY Nexrad Map BHX - Eureka, CA Nexrad Map BIS - Bismarck, ND Nexrad Map BLX - Billings, MT Nexrad Map BMX - Birmingham, AL Nexrad Map BOX - Taunton, MA Nexrad Map BRO - Brownsville, TX Nexrad Map BUF - Buffalo, NY Nexrad Map BYX - Key West, FL Nexrad Map CAE - Columbia, SC Nexrad Map CBW - Hodgdon, ME Nexrad Map CBX - Boise, ID Nexrad Map CCX - State College, PA Nexrad Map CLE - Cleveland, OH Nexrad Map CLX - Charleston, SC Nexrad Map CRP - Corpus Christi, TX Nexrad Map CXX - Colchester, VT Nexrad Map CYS - Cheyenne, WY Nexrad Map DAX - Sacramento, CA Nexrad Map DDC - Dodge City, KS Nexrad Map DFX - Laughlin AFB, TX Nexrad Map DIX - Philadelphia, PA Nexrad Map DLH - Duluth, MN Nexrad Map DMX - Des Moines, IA Nexrad Map DOX - Dover, DE Nexrad Map DTX - Detroit/Pontiac, MI Nexrad Map DVN - Davenport, IA Nexrad Map DYX - Dyess AFB, TX Nexrad Map EAX - Kansas City, MO Nexrad Map EMX - Tucson, AZ Nexrad Map ENX - Albany, NY Nexrad Map EOX - Fort Rucker, AL Nexrad Map EPZ - Santa Teresa, NM Nexrad Map ESX - Las Vegas, NV Nexrad Map EVX - Eglin AFB, FL Nexrad Map EWX - Austin, TX Nexrad Map EYX - Edwards AFB, CA Nexrad Map FCX - Roanoke, VA Nexrad Map FDR - Frederick, OK Nexrad Map FDX - Cannon AFB, NM Nexrad Map Nexrad Map FSD - Sioux falls, SD Nexrad Map FSX - Flagstaff, AZ Nexrad Map FTG - Denver, CO Nexrad Map FWS - Ft Worth, TX Nexrad Map GGW - Glasgow, MT Nexrad Map GJX - Grand Jct, CO Nexrad Map GLD - Goodland, KS Nexrad Map GRB - Green Bay, WI Nexrad Map GRK - Killeen/Gray AAF, TX Nexrad Map GRR - Grand Rapids, MI Nexrad Map GSP - Greer, SC Nexrad Map GWX - Columbus, MS Nexrad Map GYX - Gray, ME Nexrad Map HDX - Holloman AFB, NM Nexrad Map HGX - Houston, TX Nexrad Map HKI - South Kauai, HI Nexrad Map HKM - Kohala, HI Nexrad Map HMO - Molokai, HI Nexrad Map HNX - Hanford, CA Nexrad Map HPX - Hopkinsville, KY Nexrad Map HTX - Hytop, AL Nexrad Map HWA - South Hawaii, HI Nexrad Map ICT - Wichita, KS Nexrad Map ICX - Cedar City, UT Nexrad Map ILN - Wilmington, OH Nexrad Map ILX - Lincoln, IL Nexrad Map IND - Indianapolis, IN Nexrad Map INX - Tulsa, OK Nexrad Map IWA - Chandler, AZ Nexrad Map IWX - N. Webster, IN Nexrad Map JAN - Jackson, MS Nexrad Map JAX - Jacksonville, FL Nexrad Map JGX - Robins AFB, GA Nexrad Map JKL - Jackson, KY Nexrad Map JUA - San Juan, PR Nexrad Map LBB - Lubbock, TX Nexrad Map LCH - Lake Charles, LA Nexrad Map LIX - New Orleans, LA Nexrad Map LNX - North Platte, NE Nexrad Map LOT - Romeoville, IL Nexrad Map LRX - Elko, NV Nexrad Map LSX - St Louis, MO Nexrad Map LTX - Wilmington, NC Nexrad Map LWX - Sterling, VA Nexrad Map LWX - Sterling, VA Nexrad Map LZK - N. Little Rock, AR Nexrad Map MAF - Midland, TX Nexrad Map MAX - Medford, OR Nexrad Map MBX - Minot AFB, ND Nexrad Map MHX - Morehead City, NC Nexrad Map MKX - Milwaukee, WI Nexrad Map MLB - Melbourne, FL Nexrad Map MOB - Mobile/Bates, AL Nexrad Map MPX - Chanhassen, MN Nexrad Map MQT - Marquette, MI Nexrad Map MRX - Morristown, TN Nexrad Map MSX - Missoula, MT Nexrad Map MTX - Salt Lake, UT Nexrad Map MUX - San Francisco, CA Nexrad Map MVX - Fargo, ND Nexrad Map MXX - Maxwell AFB, AL Nexrad Map NKX - San Diego/Mirama, CA Nexrad Map NQA - Millington, TN Nexrad Map OAX - Omaha/Valley, NE Nexrad Map OHX - Nashville, TN Nexrad Map OKX - Upton/Brookhaven, NY Nexrad Map OTX - Spokane, WA Nexrad Map PAH - Paducah, KY Nexrad Map PBZ - Pittsburgh, PA Nexrad Map PDT - Pendleton, OR Nexrad Map POE - Fort Polk, LA Nexrad Map PUX - Pueblo, CO Nexrad Map RAX - Raleigh, NC Nexrad Map RGX - Reno, NV Nexrad Map RIW - Riverton, WY Nexrad Map RLX - Charleston, WV Nexrad Map RTX - Portland, OR Nexrad Map SFX - Pocatello, ID Nexrad Map SGF - Springfield, MO Nexrad Map SHV - Shreveport, LA Nexrad Map SJT - San Angelo, TX Nexrad Map SOX - Santa Ana mt, CA Nexrad Map SRX - Fort Chaffee, AR Nexrad Map TBW - Tampa Bay/Ruskin, FL Nexrad Map TFX - Great Falls, MT Nexrad Map TLH - Tallahassee, FL Nexrad Map TLX - Twin Lakes, OK Nexrad Map TWX - Topeka, KS Nexrad Map TYX - Montague, NY Nexrad Map UDX - Rapid City, SD Nexrad Map UEX - Grand Island, NE Nexrad Map VAX - Valdosta, GA Nexrad Map VBX - Vandenberg, CA Nexrad Map VNX - Vance AFB, OK Nexrad Map VTX - Los Angeles, CA Nexrad Map VWX - Owensville, IN Nexrad Map YUX - Yuma, AZ Nexrad Map
Learn about Base Reflectivity
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Single-site NEXRAD base reflectivity data are updated every 5, 6, or 10 minutes, depending on whether the radar is in normal precipitation mode, storm precipitation mode, or clear air mode. The same NEXRAD base reflectivity information (excluding clear air mode data) is incorporated into the WSI NOWrad national and regional mosaics, except that the NOWrad images go through rigorous quality control procedures that remove most false echoes caused by ground clutter and anomalous propagation (AP). Caution must be exercised in attempting to interpret the single site NEXRAD images because they often contain 'artifacts' that are not actual precipitation echoes.

Base Reflectivity is a measure of the intensity of precipitation occurring, and is reported in units of DBZ. The WSR-88D emits pulses of energy into the atmosphere at regular intervals. When this energy impacts something (i.e. a raindrop, a snowflake, a mountain, etc.), some of the energy is scattered back to the radar dish. The amount of energy which is received back at the radar dish is measured in units of DBZ (decibels). The higher the DBZ value the larger the object. Large raindrops and hail, for example, produce high DBZ values. In general, DBZ values greater than 15 indicate areas where precipitation is reaching the ground; DBZ values less than 15 usually are an indication of very light precipitation which in most cases is evaporating in the atmosphere before it reaches the ground.

NEXRAD or Nexrad (Next-Generation Radar) is a network of 158 high-resolution Doppler weather radars operated by the National Weather Service, an agency of the National Oceanic and Atmospheric Administration (NOAA) within the United States Department of Commerce. Its technical name is WSR-88D, which stands for Weather Surveillance Radar, 1988, Doppler. NEXRAD detects precipitation and atmospheric movement or wind. It returns data which when processed can be displayed in a mosaic map which shows patterns of precipitation and its movement. The radar system operates in two basic modes, selectable by the operator: a slow-scanning clear-air mode for analyzing air movements when there is little or no activity in the area, and a precipitation mode with a faster scan time for tracking active weather. NEXRAD has an increased emphasis on automation, including the use of algorithms and automated volume scans.
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