Section 7. Severe Weather Forecasts

9-7-1. GENERAL

Severe Weather Forecasts, Bulletins, Status Reports, and Alerts are filed at irregular intervals by the NWS Storm Prediction Center (SPC) in Norman, Oklahoma, and transmitted to WMSC for distribution. The alert (SPC AWW) is a preliminary announcement of a forthcoming severe weather watch and includes all information required for aviation purposes. Stations may obtain the Severe Weather Watch (SPC WW) from WMSC if desired. The WW number is included in the text of the AWW.

9-7-2. DISTRIBUTION

Upon receipt of SPC AWW alert, the WMSC will immediately interrupt the active task on selected Service A circuits and transmit the report. Severe weather status reports (WW-A) are never urgent. These are relayed unscheduled.

9-7-3. SEVERE WEATHER OUTLOOK NARRATIVE (AC)

In addition to Severe Weather Forecast, the Storm Prediction Center will frequently file for transmission a Severe Weather Outlook Narrative, which will contain a brief evaluation of present and expected surface and upper air criteria conducive to severe local storms. These are assigned report type "AC."