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• <br />• <br />• <br />_Basiarzo.acepts <br />WEATHER <br />Knowing existing and potential weather conditions is very <br />important for a successful snow and ice control operation. Six <br />pieces of information are especially valuable: <br />1. Start of precipitation <br />2. Type of precipitation <br />3. Total precipitation expected <br />4. Expected event length <br />5. Wind conditions (speed, gusts, directions) <br />6. Temperature trend <br />Monitor the weather closely so that you are available and pre- <br />pared to act early in storm situations. <br />Weather information sources <br />• Phone 511 to get road condition and travel information or <br />visit the Web: www.511mn.org. <br />• Talk to neighboring agencies and share information on <br />conditions. <br />• Subscribe to a value -added meteorological service <br />(VAMS). These are useful for viewing weather forecasts. <br />• Check the National Weather Service. <br />• Check all available weather sources. <br />PAVEMENT TEMPERATURE <br />Most weather stations- measure temperature and other con- <br />ditions 30 feet above ground, which means these conditions <br />can differ substantially from pavement temperatures. Thus, <br />use the pavement temperature —not the air temperature —to <br />determine your application rate. <br />You'll notice changes in pavement temperature first on bridge <br />decks; pavement temperatures will also be lower in shady ar- <br />eas. <br />Measuring with sensors or RWIS <br />There are two ways to measure pavement temperatures: <br />with sensors or with the Road Weather Information System <br />(RWIS). <br />1 <br />Pavement <br />temperatures can <br />• be substantially <br />lower or <br />higher than air <br />temperatures. <br />n <br />0) <br />X <br />