The phrase
"normal precipitation" refers to the average amount of rain or snowfall that a particular region or place typically experiences over a given period of time, usually measured over several years. It indicates what is considered typical or usual rainfall for that area.
Full definition
The remainder of the seasons across the entire province brought normal to much
above normal precipitation amounts while fall brought record breaking precipitation to some southern areas of BC.
Blocking across Northern Europe is predicted to result in below
normal precipitation for much of Europe and into Western Asia otherwise precipitation is predicted to be near normal across much of the rest of Eurasia (Figure 4).
«Looking out over the next month, there are increased chances of above normal temperatures and an increased chance of
below normal precipitation over most of the area for the month of May.»
Himalayan Times: Summer monsoon is approaching and South Asia climate outlook has predicted above
normal precipitation in Nepal.
Although Napa Valley received nearly 75 % of
normal precipitation over the past year, the relatively dry and warm winter resulted in small clusters of grapes with highly concentrated flavors.
To the north, in Montana, January is typically one of the drier months of the year with
normal precipitation totals less than 1 in (25 mm).
At the same time, the related graphic, a timeline of 21 centuries of deviations
from normal precipitation in New Mexico, showed that the authors» notion of a «new normal» could easily be said to be the «old normal» given how much of recent history has been extremely dry in that state.
Northeast BC experienced a dry winter with low snow packs and these conditions are revealed as below normal to much below
normal precipitation amounts in January and March (seasonal values are shown in Figure 3a).
This year's powerful El Niño weather system brought Northern California about 130 percent
of normal precipitation, but only about 60 percent of normal in the heavily populated Southern California coastal plain.
La Niña tends to «lead to more of a chance of below -
normal precipitation across the southern United States,» said Dan Collins, a weather forecaster at the CPC.
The almanac predicts above - normal snowfall for the Great Lakes and Midwest, especially during January and February, and above -
normal precipitation for the Southwest in December and for the Southeast in January and February.
«While most public water supplies are still generally normal throughout the state, below
normal precipitation over the last nine months, low stream flows and reduced groundwater levels have prompted the need for this action,» DEC commissioner Basil Seggos said in a statement.
SWE in the central and southern Cascades was generally were near or below 60 % of normal SWE along with
below normal precipitation.
Deviations
from normal precipitation and mild temperatures systematically increase the risk of conflict, often substantially.
«This pattern will favor continued drought in parts of the South and Southwest from Arizona to Arkansas and Louisiana, and above
normal precipitation in the Northwest and the Tennessee Valley area.»
This year's fire risk comes on the heels of a severe drought in eastern and southeastern Brazil, where the satellite data showed a continued reduction in rainfall and a drawdown of groundwater associated with lower than
normal precipitation.
«When we missed March and April, we lost 20 percent of
the normal precipitation.»
One potential snag, though, is that while the whole state is expected to see elevated chances of above -
normal precipitation this winter, it is also expected to see warmer winter temperatures.
Mexico had its wettest March since national records began in 1941, at 373 percent of
the normal precipitation.
Precipitation was variable across the West, with scattered areas receiving well above
normal precipitation.
In Montana, El Niño winters receive roughly 70 - 90 % of
normal precipitation, and both winter and summer are warmer than average (Figures 2 - 5 and 2 - 6)(NWSb undated; Higgins et al. 2007).
In the West, storms brought well above
normal precipitation to the Northwest, northern Great Basin, and some areas of the Rocky Mountains.
Despite areas of above
normal precipitation, SWE was generally below 75 % of normal in the northern and central Rockies.
Further east, western Montana and the northern Rockies observed above
normal precipitation.
Denver observed 2.13 in (54 mm), 349 % of
normal precipitation.
Even so, a single winter with above -
normal precipitation will almost certainly not be enough to lift the entire state out of drought.
In regards to precipitation, it was relatively dry this month as most of the region received less than 50 percent of
normal precipitation and only a few isolated areas received at least 150 percent of normal precipitation.
But, on the wet side of the spectrum, one of the few locations to receive above
normal precipitation this month was Colorado Springs, Colorado.
Southwest Wyoming and northwest Colorado also saw a large area of below
normal precipitation this month.
Several storms skirted the ridge, delivering above
normal precipitation to the Desert Southwest and the northern tier of the West.
Conditions were especially dry throughout central Texas, where most stations received half (or less) of
the normal precipitation for the month.
In the southern part of the state, Billings received 227 %
normal precipitation and also recorded its 8th snowiest January (18.7 in / 48 cm) since records began in 1934.
The forecast now indicates all of California is likely to see above -
normal precipitation in the January to March period.
The rest of the Northeast and New England, in a typical El Niño winter, have equal chances of seeing above - or below -
normal precipitation and temperature, meaning they are not affected by El Niño as much as other locations across the country.
While above -
normal precipitation is the norm in these years, the strong El Niño pattern in 1965 - 1966 produced exceptionally drier than average conditions in northern and central California.
Meanwhile, keep your umbrella handy if you live in northern Alaska, or the upper parts of the United States, as greater - than -
normal precipitation is expected.
California: Finally, in the United States a severe multi-year drought hurt the Texas economy and then ended with historical flooding, while California has just entered the fifth year of below -
normal precipitation, abnormally high temperatures, and reduced water availability.
Once again blocking across Northern Europe is predicted to result in below
normal precipitation for much of Europe and into Western Asia with near normal precipitation across much of the rest of Eurasia (Figure 7).
For instance, in 2009 the Southeastern states had record - high reservoir levels and high levels of hydropower generation, while the Pacific Northwest received below -
normal precipitation and, as a result, lower levels of hydropower generation.