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U.S. Regional Drought Watch

National Climatic Data Center, 13 February 2003

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Global Analysis / Global Hazards / United States / U.S. Drought / Extremes
Use these links to access detailed analyses of Global and U.S. data.

Regional Drought Overview / Western U.S. / Central U.S. / Eastern U.S. / Additional Contacts / Questions

Click here to go to Top of Page Regional Overview

January 2003 was dry across much of the country. Only the Pacific Northwest and a few parts of the northern Rockies were unusually moist. Most of the primary stations in Alaska and Hawaii had a drier than normal month. In Puerto Rico, most of the reporting stations were near to wetter than normal during the 4-week period ending January 31, but most were drier than normal for the most recent 8-week period.

Click here for map showing January 2003 1-month Standardized Precipitation Index
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The January dryness compounded the long-term drought conditions across much of the western U.S. and from the central Plains to the Great Lakes. Many of the drought areas of the east coast, which have benefited from four months of unusually moist weather (September-December 2002), saw a return to short-term dryness during January.

Click here for map showing January 2003 Palmer Hydrological Drought Index
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The long-term dryness is also evident in the pattern of snowfall anomalies. Season-to-date (July 1, 2002 - February 6, 2003) snowfall has totaled below the long-term average across much of the Far West, Great Plains, and Great Lakes regions.

These overall conditions are evident in the following indicators:

A detailed review of drought conditions is available for the following regions and states:

Click here for map showing the nine U.S. standard regions
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Click here to go to Top of Page Western U.S. Drought

January marked the second consecutive wet month averaged across the Pacific Northwest, contributing to some improvement in drought conditions in the region, but long-term deficits remained. The month averaged much drier than normal for the West and Southwest regions.
Click here for graph showing Southwest Region precipitation departures, January 1998-present
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Click here for map showing statewide precipitation ranks, February 2002-January 2003
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Moderate to extreme drought covered 75% of the western U.S. (Rocky Mountains to west coast) at the end of January. This makes the current drought the most extensive for this region since the drought of the 1930s. Of particular concern was the below-average mountain snowpack, as seen in snow course measurements and SNOTEL station snow water equivalent observations, and below-average reservoirs. The winter mountain snowpack is the source of spring meltwater which fills western reservoirs and is used for irrigation during the spring and summer growing seasons.

A detailed review of drought conditions is available for several western states and regions.


Click here to go to Top of Page Central U.S. Drought

January was unusually dry across much of the central U.S., with the Great Lakes (East North Central region) and southern Plains (South region) experiencing the third driest January in the 109-year record, and the Ohio Valley (Central region) having the fifth driest January on record. This month marked the third consecutive dry month for the East North Central region, which experienced the driest December-January and November-January on record.

Click here for graph showing East North Central Region precipitation departures, January 1998-present
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Click here for map showing statewide precipitation ranks, November 2002-January 2003
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The dryness has significantly depleted soil moisture from the central Plains to the Great Lakes. This is evident in modeled soil moisture departures as computed by the NOAA Climate Prediction Center and the Midwest Regional Climate Center at both the top soil layers and deeper layers. The drought has caused significant crop losses in the states of the West North Central region and near-record low levels for the Mississippi River at St. Louis.

A detailed review of drought conditions is available for several central U.S. states and regions.


Click here to go to Top of Page Eastern U.S. Drought

The dryness of January marked the end of a four-month wet spell for much of the east coast. Most areas here had recovered from the drought by the end of December, with only long-term hydrologic impacts (for example, low well levels) remaining. But January's dryness increased the moisture stress in many areas, with the Southeast region having the fourth driest January, regionwide, in the 109-year record. An exception is Maine, where four of the last six months have averaged drier than normal, statewide. Maine had the third driest January and fourth driest August-January in the 109-year record.

A detailed review of drought conditions is available for several eastern states and regions.

Click here for map showing Statewide Precipitation Ranks for January 2003
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Click here for graph showing Maine statewide precipitation departures, January 1998-present
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Click here to go to Top of Page Additional Contacts:

Damage due to the drought has been summarized by NOAA and the Office of Global Programs in the Climatological Impacts section of the Climate Information Project. Crop impact information can be found at the USDA NASS (National Agricultural Statistics Service) and Weekly Weather and Crop Bulletin pages. Drought statements by local National Weather Service Offices can be found at the NWS Hydrologic Information Center. Drought threat assessments and other information can be found at NOAA's Drought Information Center. Additional drought information can be found at the National Drought Mitigation Center, the USDA's National Agricultural Library, the interim National Drought Council, and the NOAA Paleoclimatology Program. The following states have set up web pages detailing current drought conditions and/or their plans to handle drought emergencies:
Colorado - Delaware - Delaware River Basin (DE-NJ-NY-PA) - Florida Panhandle - Georgia - Hawaii - Idaho - Kentucky - Maine - Maryland - Missouri-1 - Missouri-2 - Montana-1 - Montana-2 - Nebraska - New Jersey-1 - New Jersey-2 - New Jersey-3 - New Mexico - North Carolina - Oklahoma-1 - Oklahoma-2 - Oklahoma-3 - Oregon-1 - Oregon-2 - Pennsylvania-1 - Pennsylvania-2 - Pennsylvania-3 - South Carolina - Texas - Vermont - Virginia - Washington - Wyoming

For additional information on current and past wildfire seasons please see the National Interagency Fire Center web site or the U.S. Forest Service Fire and Aviation web site.

NCDC's Drought Recovery Page shows the precipitation required to end or ameliorate droughts and the probability of receiving the required precipitation.

Additional climate monitoring graphics can be found at the Climate Prediction Center's monitoring pages:

Drought conditions on the Canadian prairies can be found at the Agriculture and Agri-Food Canada Drought Watch page.

Click here to go to Top of Page For all climate questions other than questions concerning this report, please contact the National Climatic Data Center's Climate Services Division:

Climate Services Division
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4876
phone: 828-271-4800
email: ncdc.info@noaa.gov
For further information on the historical climate perspective presented in this report, contact:

Richard Heim
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4328
email: Richard.Heim@noaa.gov
-or-
Jay Lawrimore
NOAA/National Climatic Data Center
151 Patton Avenue
Asheville, NC 28801-5001
fax: 828-271-4328
email: Jay.Lawrimore@noaa.gov
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Graphic showing NOAA logo NCDC / Climate Mon. / Climate-2003 / January / U.S. Drought / Regional / Search / Help

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Last Updated Friday, 18-Nov-2005 14:11:55 EST by Richard.Heim@noaa.gov
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