KFDR radar — Frederick, OK
KFDR is the National Weather Service's WSR-88D Doppler radar for the Frederick area, operated with the NWS office OUN. View it live in TALON — the loop, super-res reflectivity, storm-relative velocity, rotation and correlation coefficient.
| Station | KFDR (Frederick, Oklahoma) |
|---|---|
| Location | 34.3620°, -98.9770° · Tillman County |
| Elevation | 1,309 ft above sea level |
| Type | WSR-88D (NEXRAD) S-band dual-polarization Doppler radar |
| Products in TALON | Super-res reflectivity (0.25 km), velocity, storm-relative velocity, rotation (azimuthal shear), correlation coefficient PRO |
How high can KFDR see?
A radar beam travels in a nearly straight line while the Earth curves away underneath it, so the farther a storm is from KFDR, the higher above the ground the radar is looking. Tornadoes start in the lowest few thousand feet, so storms close to the radar show low-level rotation much better.
| Distance from KFDR | Lowest scan (0.5°) | Next scan (1.5°) |
|---|---|---|
| 10 mi | 500 ft | 1,400 ft |
| 25 mi | 1,500 ft | 3,800 ft |
| 50 mi | 3,600 ft | 8,200 ft |
| 75 mi | 6,300 ft | 13,200 ft |
| 100 mi | 9,600 ft | 18,800 ft |
| 150 mi | 18,200 ft | 32,000 ft |
Height of the beam's center above the radar, using standard refraction. Terrain can raise or block the beam.
Severe weather inside KFDR's range
Since 1950, NOAA has recorded 761 tornadoes within 60 miles of the KFDR radar, 147 of them rated EF2/F2 or stronger. They have been most common in May and April. The strongest was an F5 on April 3, 1964, which passed about 42 miles southeast of the radar and caused 7 deaths. The most recent was an EF0 on August 28, 2025, which touched down about 31 miles east-southeast of the radar.
Hail: 4,068 reports of hail 1 inch or larger within 60 miles of the KFDR radar since 1955, 629 of them 2 inches or larger. The largest was 6.00-inch hail (grapefruit size) on May 23, 2011.
| Tornadoes since 1950 | 761 |
| EF2/F2 or stronger | 147 |
| Strongest tornado | F5 · Apr 1964 |
| Busiest tornado month | May |
| Largest hail | 6.00 in · May 2011 |
Source: NOAA Storm Prediction Center severe weather database — tornadoes 1950–2025, hail 1955–2025 (the latest year is preliminary). Distances are to each tornado's recorded track; ratings before February 2007 use the original Fujita (F) scale.
Cities covered by KFDR
- Lawton, OK 37 mi east-northeast
- Wichita Falls, TX 42 mi southeast
- Norman, OK 106 mi northeast
- Moore, OK 108 mi northeast
- Oklahoma City, OK 113 mi northeast
- Denton, TX 132 mi southeast
- Abilene, TX 139 mi south-southwest
- Fort Worth, TX 146 mi southeast
- Frisco, TX 149 mi east-southeast
- Enid, OK 154 mi north-northeast
- Arlington, TX 156 mi southeast
- McKinney, TX 156 mi east-southeast
Nearby radars
- KTLX · Oklahoma City, OK 117 mi
- KDYX · Dyess AFB, TX 127 mi
- KFWS · Dallas/Fort Worth, TX 157 mi
- KAMA · Amarillo, TX 166 mi
- KLBB · Lubbock, TX 170 mi
KFDR radar FAQ
How often does KFDR update?
Every NEXRAD radar completes a full scan about every 4–6 minutes in storm mode, and repeats the lowest tilt more often (SAILS) during severe weather. TALON loads each new scan as it arrives.
What is the range of KFDR?
Reflectivity reaches about 290 miles and velocity about 185 miles, but useful low-level detail is within roughly 100 miles — see the table above.
Is KFDR down?
Radars occasionally go offline for maintenance. When one does, TALON's US radar map fills the gap from neighboring radars (KTLX, KDYX, KFWS).