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Skywarn Activation Guidelines |
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Written by Paul Reinhardt
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Saturday, 16 January 2010 19:48 |
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These criteria provide guidance for the Skywarn NCS when establishing net conditions. There are two major goals:
· Prevent check-ins and lower priority reports, such as those reporting gust front arrival, from interfering with higher priority reports, such as those involving damaging winds or tornadoes.
· Permit as many spotters to check-in as possible.
The Skywarn NCS may establish net conditions as appropriate to meet the above goals, using the following table of minimum recommended net conditions. To use the table, read down the list of situations until you find a question that can be answered, “Yes.” Then, look under the appropriate watch status column to determine the net condition.
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Adjacent Counties
Lapeer Oakland Wayne St Clair
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Net Condition / NCS Status
(Based on Macomb County National Weather Service Watch Status)
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Item
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Situation
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No Watch
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Severe Thunderstorm Watch
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Tornado Watch
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1
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Are spotters reporting tornadoes, funnel clouds, or wall clouds in Macomb county?
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Red
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Red
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Red
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2
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Is there a tornado warning for Macomb County?
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Red
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Red
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Red
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3
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Are spotters reporting hail or damaging winds in Macomb County?
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Yellow
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Yellow
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Yellow
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4
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Is there a tornado warning in an adjacent county, with the storm moving toward Macomb County?
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Yellow
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Yellow
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Yellow
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5
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Is there a severe thunderstorm warning for Macomb County?
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Green
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Green
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Yellow
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6
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Is MICON requesting activation in Macomb County?
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Green
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Green
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Green
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7
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Is there a severe thunderstorm warning in an adjacent county, with the storm moving toward Macomb County?
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Standby NCS
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Green
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Green
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8
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Is there a thunderstorm in Macomb County?
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Standby NCS
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Standby NCS
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Green
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9
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Is MICON requesting general activation, or activation in adjacent counties?
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Standby NCS
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Standby NCS
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Standby NCS
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10
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Are thunderstorm cells in adjacent counties moving toward Macomb?
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Inactive
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Inactive
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Standby NCS
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11
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All others
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Inactive
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Inactive
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Inactive
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Skywarn Reference Material