close

Вход

Забыли?

вход по аккаунту

?

Drought0708

код для вставкиСкачать
North Carolina Drought
2007-2008
National Weather Service
Newport/Morehead City, NC
Sarah Jamison
Drought 2007-2008
•Started in and out of drought conditions
in the western part of the state in 2006
•Persistant dry and warm conditions in
spring 2007 kept the area in an expanding
and deepening drought status
•Drought “peak” in late summer of 2008
•Conditions gradually improving from east
to west in late 2008 and into early 2009.
Spring 2007
•Developing La Nina in equatorial Pacific
•Less active severe season over NC, and subsequently less
rainfall
•Dominant high pressure over the southeast led to
warmer than normal temperatures.
Spring 2007
•Drought conditions begin to overspread the
southeast and most of NC
Summer 2007
•August Heat Wave-Temperatures soared in late July
and early August, which enhanced the amount of
evaporation.
Summer 2007
•Ground water and soil moistures began to deteriorate,
with impacts on crops and water reservoirs increasing
Tropical Season 2007
•Relatively dry tropical season
•Only direct strike was TS Gabrielle on September 9
•Heavy rainfall isolated to near the coast where >9” of
rain fell. However most areas remained dry.
•Seasonal rainfall well below normal due to lack of
tropical rains
2007 Summary
2007 Rainfall Departure from Normal
•State annual precipitation amounts were significantly drier
than normal with many areas receiving 25-20% of normal
Winter/Spring 2008
•2008 started off with initial drought conditions ranging
from severe (D2) to exceptional (D4).
Winter/Spring 2008
•Near normal rainfall, heavier in the east improved
drought conditions in the late winter/spring months.
2008 Summer
June monthly rainfall departure from normal
•Below normal rain during the summer months
deteriorated conditions again.
2008 Summer
•Above normal temperatures combined with below
normal rainfall to deteriorate conditions again. August
is typically one of the wettest months of the year, so
low rainfall amounts added significantly to annual
precipitation deficits.
2008 Tropical Summary
•Tropical Storm
Cristobal: 7/20/08
2008 Tropical Summary
•Tropical Storm Hanna,
9/6/08
•Best rain over central
part of state, >5”
•None in west and 1-3”
in east
2008 Tropical Summary
•Drought result form tropical activity. Big improvement in
the central part of the state. No change in west or east.
2008 Fall/Winter
November radar estimated monthly precipitation
•Heavy rainfall in east from coastal storms improved
drought conditions there. West still struggled to break
drought.
2008 Summary
2008 Rainfall Departure from Normal
•Year to date precipiation amounts were better than
2007, yet still below normal for most areas.
Drought Summary
•Though the majority of the state has improved in soil
moisture and ground water by the end of 2008,
conditions are still considered below normal and could
fall back into a drought again if 2009 continues to be dry
and warm.
Drought Summary
Animation of annual drought maps for 2007
Drought Summary
Animation of annual drought maps for 2008
2009 Outlooks
•CPC precipitation seasonal outlooks show a greater chance of below normal
rainfall over the winter/spring months and equal chances by summer.
2009 Outlooks
•CPC temperature seasonal outlooks show an equal chances of
above/below/normal temperatures this spring/summer.
ENSO Outlooks
The CFS ensemble mean (heavy blue line) indicates La
NiГ±a conditions through Spring 2009.
Resources/Related Links
•NC Drought Advisory Board, www.ncdrought.org
•U.S. Drought Monitor,
drought.unl.edu/dm/monitor.html
•Natioanl Hurricane Center
www.nhc.noaa.gov/2008atlan.shtml
•Climate Prediction Center www.cpc.noaa.gov
•Hydrologic Prediction Center
www.hpc.ncep.noaa.gov
•National Integrated Drought Information System
(NIDIS) www.drought.gov
Документ
Категория
Презентации
Просмотров
5
Размер файла
4 196 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа