In situations where a forecaster expects a significant threat of extremely severe and life-threatening weather, a watch with special wording of "Particularly Dangerous Situation" (PDS) is subjectively issued.
The dominance of these large wildfires in burned area, duration, and emissions makes these events a significant concern of air quality forecasters and regulators.
Gritit said: "With forecasters predicting a significant drop in temperatures this weekend, we are expecting our teams to be out gritting for the first time this season".
Without a significant acceleration in coming months, which forecasters do not expect, the unemployment rate may well stay above 8percentthroughgh the end of the year.
By the fall, some urban water suppliers were struggling to meet their conservation targets and forecasters began predicting that a significant El Niño could bring heavy rain to the parched state.
California won't start adding a significant number of building permits until 2013, forecasters say, which is one of the reasons the state's unemployment rate will stay above 10% until the middle of that year.
The Treasury's own forecaster, the Office for Budget Responsibility, has predicted a significant rise in business investment next year – on the basis that it normally follows a rise in consumer spending.
Forecasters, however, say they do not expect a significant change in Beryl's strength before it comes ashore and predict it will weaken to a depression by Monday night.
Any predictions about the storm's path and strength are subject to change, but forecasters and officials believe that Hurricane Sandy will have a significant effect on a large swath of the East Coast.
Operationally, forecasters at the National Hurricane Center believed a surge of southerly inflow transported a significant amount of atmospheric vorticity away from the old center of low pressure, allowing for a new surface-based circulation to form.
Some of his findings are relevant to the past week, not least that most engaged forecasters tend to only be slightly more accurate than chance, and amusingly, the addition of a significant media profile suggests a greater likelihood of inaccuracy.
