Noaa Full Loop (2024)

FAQs

What are the 7 frequencies for NOAA? ›

All NOAA Weather Radio stations broadcast on one of seven frequencies in the VHF Public Service band: 162.400 megahertz (MHz), 162.425 MHz, 162.450 MHz, 162.475 MHz, 162.500 MHz, 162.525 MHz, and 162.550 MHz.

Values of 50 dBZ or more normally are associated with heavy thunderstorms, perhaps with hail, but as with most other quantities, there are no reliable threshold values to confirm the presence of hail or severe weather in a given situation.

In clear air mode, images you see are updated every 10 minutes. In precipitation mode, images you see are updated every five or six minutes. The collection of radar data, repeated at regular time intervals, is referred to as a volume scan.

The radar's computers measure the phase change of the reflected pulse of energy which then convert that change to a velocity of the object, either toward or from the radar. Information on the movement of objects either toward or away from the radar can be used to estimate the speed of the wind.

NOAA Weather Radio (NWR), also known as NOAA Weather Radio All Hazards, is an automated 24-hour network of VHF FM weather radio stations in the United States that broadcast weather information directly from a nearby National Weather Service office.

Radio frequency communications for spacecraft are conducted between 30 MHz and 60 GHz. The lower frequency bands (up to S-band) are typically more mature for SmallSat use, however extensive use of these bands has led to crowding and challenges acquiring licensing.

VIP 1 (Level 1, 18-30 dBZ) - Light precipitation. VIP 2 (Level 2, 30-38 dBZ) - Light to moderate rain. VIP 3 (Level 3, 38-44 dBZ) - Moderate to heavy rain. VIP 4 (Level 4, 44-50 dBZ) - Heavy rain.

Generally speaking, reflectivity values lower than about 35 dBZ are light rain; values between 35 and 50 dBZ are moderate rain; and values above about 50 dBZ are heavy rain. Reflectivity values above about 55 dBZ are usually hail.

As a raindrop falls through the atmosphere, it can attract tens to hundreds of tiny aerosol particles to its surface before hitting the ground. The process by which droplets and aerosols attract is coagulation, a natural phenomenon that can act to clear the air of pollutants like soot, sulfates, and organic particles.

Is the air clearer after rain? ›

The air always seems more refreshing after a rainstorm. That's because raindrops condense around all the gunk in the sky—the dust, pollen, and pollution. As rain falls, it condenses onto sulfur particles and takes them with it. The scrubbed air naturally smells cleaner.

Bottom Line: Does Rain Reduce Air Pollution? Rain has a small impact of 0-30% on reducing particulate air pollution. Even the heaviest rains reduce PM2. 5 air pollution by less than 10%, whereas the winds that sometimes accompany rainstorms have much larger effects.

55 to 63 mph Considerable structural damage occurs, especially on roofs. Small trees may be blown over and uprooted. 64 to 75 mph Widespread damage occurs. Larger trees blown over and uprooted.

Why are tornadoes still so difficult to forecast? Meteorologists have gotten a lot better at forecasting the conditions that make tornadoes more likely. But predicting exactly which thunderstorms will produce a tornado and when is harder, and that's where a lot of severe weather research is focused today.

NOAA APT Satellites transmit on frequencies between 137.1000 and 137.9125 MHz FM using between 30 and 40kHz bandwidth.

NOAA Weather Radio broadcasts the latest weather information on seven frequencies in the 162.40 to 162.55 MHz range and can be received up to 40 miles from the transmitter.

The alert tone is transmitted over the NWR in which its listening area is affected by the warning or watch. The tone is sent at a level of 1050 Hz and will set off an alarm on those weather radio receivers that have a "tone alert" feature.