Weather

National Weather Service all hazards alert radios

Every family, and many businesses, should have a National Weather Service (NWS) all hazard alert radio. The NWS not only provides current weather conditions and forecasts, they also transmit all hazard alerts for a wide area. These alerts are not all weather related: such as "shelter in place", "radiation hazard", "civil emergency message", "evacuation immediate", "911 telephone outage" or "child abduction emergency". All hazard alert radios can be programmed for only one county.

The "Specific Area Message Encoding" ( SAME ) is a 6 digit code: ABCDEF. A = in most cases 0, it can be used to sub-divide a county into zones ( 1 - 9 ) otherwise zero for the entire county, BC = state number; DEF = county number. Example: Clay county Missouri 0 29 047 / 0 = entire county / 29 = Missouri state code/ 047 = Clay county code.

If a hazard affects a larger area or region, then all the affected counties will be individually triggered by the alert signal. Most NWS radios can be programmed for multiple counties.

The National Weather Service has seven radio channels, frequency modulated (FM) voice and data:

162.400, 162.425, 162.450, 162.475, 162.500, 162,525, and 162.550.

National Weather Service station coverage and "SAME" codes can be obtained a the NOAA web site.

High and Low Pressure Forecast

H = High pressure (trade winds, nice cool air, blue sky, sunshine and good weather)

L = Low pressure (warm humid air that brings cloudy sky and rain showers)


General Information

-High Pressure:

Clear Skies

Light Winds

Settled Weather

Isobars are quite far apart

Travel clockwise in Northern Hemisphere

-Low Pressure:

Strong Winds

Heavy Rains

Unsettled Weather

Isobars are close together

Travel counter clockwise in southern Hemisphere

-Cold Front: Blue Line with triangle on it

-Warm Front: Red Line with half circles on it

-Occludded Front: Purple Lines with triangles & half circles on it Occurs when a cold front catches up to see warm front Clouds & Rainfall

-Weakening Warm front: Red half circles & triangles separated by an X A front that is starting to dissipate Cloud & Rainfall start to disappear

-Trough: Thick black line Increasing cloud cover & increase chance of rain

A long area of low surface pressure

-Average Sea Level pressure is 1013 MB.

Below 1013 is low pressure & above is high pressure

Hurricane, Typhoon and Cyclone Storms

Category 1 winds 74-95 mph surge 3-5 feet

Category 2 winds 96-110 mph surge 6-8 feet

Category 3 winds 111-130 mph surge 9-12 feet

Category 4 winds 131-155 mph surge 13-18 feet

Category 5 winds 155+ mph surge 19 feet or higher