Alabama 811 | Know What's Below.

Tag: STP

Very High STP Values Moving Into Alabama

Very High STP Values Moving Into Alabama

| April 27, 2011 @ 1:29 pm | 4 Replies

A major severe weather outbreak is likely anytime from now until midnight. See the high STP (Significant Tornado Parameter) values from the RUC at 1:00… remember, anything over 2 is very significant. These are about as high as they get.

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Dangerous Situation Tomorrow

Dangerous Situation Tomorrow

| April 26, 2011 @ 8:00 pm | 11 Replies

Not much change in our thinking for tomorrow… See the SREF output below, valid at 7:00 p.m. tomorrow. This is the chance of the significant tornado parameter (STP) exceeding 5 units; the model gives that a 90 percent chance in the general area from Gadsden to Mobile. Understand a STP over 2 is very significant, […]

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