We are having an interaction problem with the radar site locations overlapping each other and triggering into storm mode. To better understand here is another clip.
Radar sends out electromagnetic radiation that strikes hydrometeors in the atmosphere. Some of this radiation reflects back directly toward the radar set. This energy that is reflected directly back is called backscattered radiation.
The amount of energy the radar receives (compared to the amount it sends out) is very SMALL. An example of this is to think about the amount of light reflected of Mars and seen on Earth compared to the total energy emitted from the Sun. The Earth only receives a very small amount of the total energy that the sun gives off that is reflected off Mars and toward the Earth.
Radar sends out a certain wavelength of electromagnetic radiation. This electromagnetic radiation is of the longwave variety and therefore will not damage the environment. The energy emitted from the radar travels at about the speed of light as does all electromagnetic radiation. The speed of light is 299,800,000 m/s. With this speed, radar can sample hydrometeors during one pulse in a small fraction of a second. Radar can typically send and receive radiation between 200 and 3,000 times in one second. The number of pulses radar sends out is called the Pulse Repetition Frequency.
For a little more history to get the grasp of the problems taking place to this severe tornado outbreak over Dallas Texas yesterday lets look at what Wikipedia says;
The W band of the microwave part of the electromagnetic spectrum ranges from 75 to 110 GHz. It sits above the U.S. IEEE designated V band (50–75 GHz) in frequency, yet overlaps the NATO designated M band (60–100 GHz). The W band is used for satellite communications, millimeter wave radar research, military radar targeting and tracking applications, and some non-military applications.
A number of passive millimeter-wave cameras for concealed weapons detection operate at 94 GHz. A frequency around 77 GHz is used for automotive cruise control radar. The atmospheric radio window at 94 GHz is used for imaging millimeter-wave radarapplications in astronomy, defense, and security applications.
Less-than-lethal weaponry exists that uses millimeter waves to heat a thin layer of human skin to an intolerable temperature so as to make the targeted person move away. A two-second burst of the 95 GHz focused beam heats the skin to a temperature of 130 °F (54 °C) at a depth of 1/64th of an inch (0.4 mm). The United States Air Force andMarines are currently using this type of Active Denial System.
In terms of communications capability, W-band offers high data rate throughput when used at high altitudes and in space. (The 71 – 76 GHz / 81 – 86 GHz segment of the W-band is allocated by the International Telecommunication Union to satellite services.) Because of increasing spectrum and orbit congestion at lower frequencies, W-band satellite allocations are of increasing interest to commercial satellite operators, although no commercial project has yet been implemented in these bands.
Note the reference of 95 GHZ and its scaler heating properties, part of SuperDarn and HARRP design for atmosphere heaters and read the following taking place in Oklahoma from the ARM site.
The Microwave Radiometer-High Frequency (MWRHF) provides time-series measurements of brightness temperatures from two channels centered at 90 and 150 GHz. These two channels are sensitive to the presence of liquid water and precipitable water vapor.
A detailed description of the calibration algorithm can be found in the instrument handbook.
A copy of the PDF is here; http://www.arm.gov/publications/tech_reports/handbooks/mwrhf_handbook.pdf?id=42
The central plains location for ARM is;
Southern Great Plains
SGP Central Facility, Ponca City, OK
36° 36′ 18.0″ N, 97° 29′ 6.0″ W
Also of note was how the water vapor that should have wrapped up into southern Kansas bringing rain to the area on 4/3/2012 but was pushed back against it self.
For now take another look at central Texas radar site when it goes into flash mode, note the changes in operation mode in scale at the bottom and the call signs for program design.
If this overlap problem with this new dual band frying the moisture clouds and pushing them into a frenzy is not solved then we can expect more severe outbreaks in the eastern Texas forecast to happen again.