WRAL WeatherCenter Blog

In reporting on the 2007 drought you give the annual rainfall deficit since January 1, 2007. What happened to the 2006 deficit? In other words, what is our cumulative deficit over the last couple of years?

Posted December 22, 2007

MIKE MOSS SAYS:      Vern,    For calendar year 2006, RDU recorded 53.69 inches of rainfall, which was 10.6 inches above normal. As of today (22 December) rain at RDU is about 9.3 inches below normal for 2007. A cumulative anomaly (about +1 inch in this case) stretching over two years (or several) isn't always especially helpful, since the impacts of drought can be more focused on the most recent half-year or so if that period involved rainfall well below normal and evaporative losses and water demand were exacerbated by unusually warm temperatures, which has been the case in the current event. Also, since the beginning of 2007, at least, much of the region has experienced rainfall deficits that are notably larger than those indicated by the numbers for RDU, since on several occasions in the spring and summer relatively heavy showers that covered only a small part of the area happend to affect the airport.

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  • Mike Moss Dec 31, 2007

    GoPanthers, Actually high pressure areas with relatively tranquil weather cover much more of the globe at any given time than the smaller low pressure centers, frontal boundaries and convergence zones where most of the deeper clouds and precipitation areas congregate. For most of the world, this leads to a greater number of days without precipitation that with. Of course, there are some localized and seasonal exceptions (places where it DOES rain day after day for weeks on end) but for most of us it's more of a sporadic occurrence.

  • gopanthers Dec 30, 2007

    Why is it that you have equal amounts of high and low pressures moving about the planet every year, but yet there are alway's more sunny day's then rainiy ones through out the year. You can go day's/ weeks without rain (setting drought conditions aside) but you don't go day's/weeks with rain? It just seems to me it should be equal or close to amounts of clear and rainy day's.

  • DontLikeTheSocialistObama Dec 23, 2007

    The biggest problem that we have is that Raleigh oversold the capacity of the Falls Lake. The problem is not the drought, it's poor water management by the City of Raleigh and Corp of Engineers. None of the other area lakes are as low as the Falls Lake. Jordan, Kerr, and Gaston are all doing fairly well considering the drought.

    I went up I-85 a few weeks ago and passed over Gaston. You can't tell that we're in a drought looking at Gaston.

    I wonder why Raleigh isn't using Wake Forest's old water supply before Raleigh took over Wake Forest's water system. There is a reservoir east of Wake Forest that Wake Forest used to use for it's water supply.