{"id":3067,"date":"2015-03-20T19:47:35","date_gmt":"2015-03-20T19:47:35","guid":{"rendered":"http:\/\/ialert.com\/blog\/?p=3067"},"modified":"2015-05-28T11:50:46","modified_gmt":"2015-05-28T11:50:46","slug":"understanding-national-weather-service-severe-weather-outlooks","status":"publish","type":"post","link":"https:\/\/ialert.com\/blog\/weather-articles\/understanding-national-weather-service-severe-weather-outlooks\/","title":{"rendered":"Understanding National Weather Service “Severe Weather Outlook”"},"content":{"rendered":"

Example Outlook Below<\/strong>\"Example<\/p>\n

Severe weather outlooks, also commonly referred to as convective outlooks, are issued daily by the National Weather Service Storm Prediction Center in both text and graphic form.\u00a0 iAlert hosts the severe weather outlook graphics which you can access by clicking here<\/a>.<\/p>\n

Convective Outlooks are divided into four periods.<\/strong><\/p>\n\n\n\n\n\n\n
Day\u00a01<\/th>\nThis is the risk of severe weather today through early morning of the following day. Day 1 forecasts are issued five times daily; 06z (around midnight), 13z (around sunrise), 1630z (mid-morning), 20z (mid-afternoon), and 01z (early evening).<\/td>\n<\/tr>\n
Day 2<\/th>\nDay 2 continues from the ending of Day 1 (tomorrow morning) for the next 24 hours. These are issued twice daily; 07z (around midnight) and 1730z (around noon).<\/td>\n<\/tr>\n
Day 3<\/th>\nThis is the forecast for the subsequent 24 hours. Day 3 forecasts are issued daily by 0830z on standard time and 0730z on daylight time (after midnight).<\/td>\n<\/tr>\n
Days 4-8<\/th>\nA severe weather area depicted in the Day 4-8 period (issued at 10z (early morning) indicates a 30% or higher probability for severe thunderstorms (e.g. a 30% chance that a severe thunderstorm will occur within 25 miles of any point).<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The convective outlook graphics display up to six different color categories to reflect an increase in the likelihood of occurrence and\/or increased severity of a severe weather event.<\/p>\n

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General Thunderstorms<\/h3>\n

The light green shading depicts a 10% or higher probability of non-severe or near severe thunderstorms during the valid period.<\/p>\n

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Severe Category 1 – Marginal<\/h3>\n

The dark green shading area indicates a marginal (MRGL) risk of severe thunderstorms during the forecast period. This means a…<\/p>\n