National Weather Service United States Department of Commerce

Heavy Rain and Potential for Flash Flooding for Mid-Atlantic

An unseasonably strong storm system will bring heavy rain to the Mid-Atlantic and central Appalachians Friday into Saturday. Flash flooding and widespread lowland flooding are possible during this period. Meanwhile, monsoon moisture will continue to produce heavy rain with the possibility of localized flash flooding in the Desert Southwest through the southern/central Rockies and High Plains. Read More >

Today will be another scorcher and the hottest day thus far this season for many locations. Afternoon highs will range from the middle 90s to around 103 with afternoon heat index values as high as 110. Therefore, a Heat Advisory is in effect for much of North and Central Texas today.
A cold front will move into the region tonight, and this will bring some low chances for showers and thunderstorms to the region. Not everyone will see rainfall. Low temperatures across the area will fall into the middle and upper 70s.
It is July in Texas and it's hot. So you're probably thinking why is the National Weather Service telling us about the heat? Well, it's simple: heat kills. Know the signs of heat exhaustion versus heat stroke. Faint or dizzy with excessive sweating, that's heat exhaustion. Get to a cooler place and drink water. What if you or someone you know, is in the heat and suddenly stops sweating, gets a throbbing headache and/or nausea? Well, these are signs of a Heat Stroke and this is an emergency situation. Your body is no longer able to cool off and if you don't get immediate care - it can be fatal. If you're suffering from Heat Stroke, you should call 9-1-1 and then immediately take action to cool down as you wait for help to arrive.
It'll be a hot one again on Saturday, with the hottest conditions being displaced across portions of Central Texas. Low thunderstorm chances will exist across parts of North and Central Texas this weekend, but drier air will work its way in from the northeast by Sunday. Moisture will then start to slowly increase as we head into next week, and additional chances for showers and storms will develop. Temperatures will remain generally in the lower 90s Monday and Tuesday.
A pattern change will occur next week, as the hot upper level high moves off to the northwest. This will bring northerly flow aloft to the region and bring slightly cooler conditions and scattered rain and storm chances to the area each day next week.

Text Product Selector (Selected product opens in current window)
Latest Text Products Issued (Experimental)
Safe Rooms Icon Cooperatirve Rainfall (CoCoRaHs) icon Storm Ready Icon AirNow Icon



line border

NWS Fort Worth COOP Newsletter:    National COOP Newsletter:


 National COOP Website


The Cooperative Observer Program (COOP) consists of volunteer weather observers who take and record weather observations every day.  The data from these COOP sites help to fill in data voids where automated weather stations at airports don't exist. Across the United States and its territories, over 12,000 COOP volunteers take daily weather readings every day. The mission of the COOP Program is two-fold:

  • To provide observational meteorological data, usually consisting of daily maximum and minimum temperatures, snowfall, and 24-hour precipitation totals, required to define the climate of the United States and to help measure long-term climate changes.

  • To provide observational meteorological data in near real-time to support forecast, warning and other public service programs of the NWS.

Data from these COOP sites are processed and published in various forms by the National Climatic Data Center (NCDC) in Asheville, North Carolina. In fact, the data sent in by local COOP observers is one of the most requested products from the NCDC archives!  The data is used by thousands of people and organizations including government agencies, lawyer and insurance groups, medical fields, construction crews, engineers, farmers and agriculture, transportation, real estate, and many more!  A few ways that the National Weather Service uses the COOP data is:

  • Daily weather forecasting
  • Maintain historical records and normals
  • Study weather patterns
  • Drought monitoring
  • Extreme weather events (severe and winter weather, heat waves, cold snaps, etc)
  • Verify severe and winter weather events
  • Climate study and climate change

The National Weather Service office in Fort Worth has over 140+ COOP sites; the second most for any NWS office in the Southern Region. These sites are located at private residences, businesses, and lakes across north Texas. All of the sites in north Texas record precipitation and over half of them also report temperature.



The history of taking weather observations dates all the way back to the colonial days. The earliest known records are those of John Campanius Holm who took weather observations in the mid-1600s.  After him, weather records by famous people such as George Washington, Thomas Jefferson and Benjamin Franklin have also been found and archived. Thomas Jefferson recorded an unbroken weather record from 1776 until 1816, and George Washington took observations until just days before he died.

However, it was Thomas Jefferson who first envisioned a network of weather observers. He managed to recruit volunteer weather observers in six states including Virginia, Massachusetts, Pennsylvania, Connecticut, New York and North Carolina.  In 1849, the Smithsonian Institute set up a system for receiving weather data from telegraph companies, via the telegraph, and used the data to produce weather charts. At the time, there were 150 volunteers sending in their weather observations.

The Weather Bureau (now the National Weather Service) was created under the Organic Act in 1890 and the COOP program was soon transferred into their responsibility. By then, the number of weather observers had grown to around 2,000 stations. However, it wasn't until 1953 that the push was made to expand the network across the country. Dr. Helmut Landsberg conducted a study with Iowa State University and came to the conclusion that an observation site was needed every 25 miles. This is the system that the National Weather Service uses today. By 1990, the number of observers had grown to 10,000 stations, and today there are over 12,000 COOP stations.



arrow Requesting Supplies

arrow COOP Climate Data

  • Daily COOP Report - A table of daily observations reported by our COOP Observers. This table is generated and sent every day
  • NCDC COOP Page - Link to COOP records at the National Climatic Data Center
  • Regional COOP Records, Normals, and Extremes - Select your location on the map below for monthly normals of temperature, precipitation and degree days. You will also see the monthly and annual rainfall for each site for many years. Selecting either DFW or Waco will provide extensive climatological data.

arrow WxCoder

  • WxCoder Tips - Tips for using the system and filling out your form each month

arrow IV-ROCS

  • 1-877-266-7627

arrow Forms

  • How to correctly fill in your form (including tips):     B-91     B-92

arrow Fischer-Porter

arrow Snow

arrow Severe Weather Reporting


3401 Northern Cross Blvd

Fort Worth, TX 76137

(817) 429-2631


Normals and Data

Select a location on the map below or from the menu beneath it. You will find monthly and annual normals as well as archived precipitation totals. Selecting either DFW or Waco will provide extensive climatological data.

DFW Waco Dallas Love Alvarado Alvord Ambrose Antelope Aquilla Arlington Athens Bardwell Benrbook Bonham Bonita Bowie Brandon Brazos Breckenridge Bremond Bridgeport Burleson Cameron Carbon Center City Centerville Chalk Mountain Cleburne Cleburne 7SE Commerce Cooper Copperas Cove Corsicana Cranfills Gap Crawford Cresson Davilla Decatur Denton Dublin Edom Emory Evant Farmersville Ferris Flat Forestburg Fort Worth NWS    Fort Worth
                        Nature Center Franklin Frisco Gainesville Gatesville Goldthwaite Gordon Graham Granbury Grapevine Greenville Hamilton Hico Hillsboro Honey Grove Huckabay Hurst Springs Itasca Jacksboro Joe Pool Lake Justin Kaufman Kaufman 13ENE Kopperl Lake Bridgeport Lake Tawakoni Lampasas Lavon Lewisville Lipan Marlin McGregor McKinney Meridian Mexia Midlothian Monkstown Morgan Morgan Mill Muenster Navarro Mills Nix Store Oakwood Olney Palestine Palo Pinto Paris Pidcoke Proctor Rainbow Remuda Richardson Roanoke Rockdale Rockwall Rosebud Rosser Sherman Stephenville Stillhouse Hollow Strawn Sulphur Springs Terrell Thorndale Thornton Trenton Troy Waco Dam Waxahachie Weatherford West Whitney Wills Point Wolfe City Youngsport