Global Analysis - May 2004


Global Highlights:

  • Based on preliminary data for May 2004, global average combined land and sea surface temperature was fifth warmest on record, and fourth warmest for March-May 2004
  • March-May temperatures were above average throughout the entire U.S., China and Europe, with below average temperatures in Spain, Mexico and far western Russia
  • Precipitation during March-May was above average across the Mississippi Valley of the U.S., Alaska, India and the Korean Peninsula, with drier than average conditions in the southeastern U.S., eastern Australia, southeastern Asia and far western Canada
  • Near-normal SSTs across the central and eastern equatorial Pacific basin were indicative of neutral ENSO conditions.
 

Contents of this Section:

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The data presented in this report are preliminary. Ranks and anomalies may change as more complete data are received and processed. The most current data may be accessed via the Global Surface Temperature Anomalies page.
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Top of Page Introduction

The maps below use anomalies that were calculated from the Global Historical Climatology Network (GHCN) data set of land surface stations using a 1961-1990 base period. The map on the left reflects conditions during March-May 2004, indicating above average temperatures across Asia, Europe, Greenland and Scandinavia, while cooler than average temperatures occurred in parts of Canada and Mexico. The map on the right reflects conditions during May 2004, indicating above average temperatures in the northeastern U.S., western Europe, South Africa and Alaska with cooler than average temperatures in the northern Great Plains of the U.S., Argentina, eastern Europe and southern portions of India.

The mean position of upper level ridges of high pressure and troughs of low pressure (depicted by positive and negative 500 millibar height anomalies on the March-May 2004 and May 2004maps ) are generally reflected by areas of positive and negative temperature anomalies at the surface, respectively. For other Global products see the Climate Monitoring Global Products page.
Click here for current month's Temperature Dot map
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Click here for current month's Temperature Dot map
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Top of PageTemperature Rankings and Graphics

Current Month / Seasonal / Year-to-date
May Anomaly Rank Warmest Year on Record
Global
Land
Ocean
Land and Ocean
+0.46°C (+0.83°F)
+0.34°C (+0.61°F)
+0.38°C (+0.68°F)
9th warmest
6th warmest
5th warmest
1998 (+0.94°C/1.70°F)
1998 (+0.53°C/0.95°F)
1998 (+0.65°C/1.17°F)
Northern Hemisphere
Land
Ocean
Land and Ocean
+0.58°C (+1.04°F)
+0.35°C (+0.63°F)
+0.44°C (+0.79°F)
6th warmest
3rd warmest
5th warmest
2001 (+1.00°C/1.80°F)
1998 (+0.51°C/0.92°F)
1998 (+0.66°C/1.19°F)
Southern Hemisphere
Land
Ocean
Land and Ocean
+0.08°C (+0.14°F)
+0.34°C (+0.61°F)
+0.29°C (+0.52°F)
54th warmest
11th warmest
19th warmest
2002 (+1.00°C/1.80°F)
1998 (+0.56°C/1.01°F)
1998 (+0.64°C/1.15°F)

Click here for Global Land and Ocean Triad plot
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Click here for Global Hemisphere Triad plot
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March-May Anomaly Rank Warmest Year on Record
Global
Land
Ocean
Land and Ocean
+0.96°C (+1.73°F)
+0.37°C (+0.67°F)
+0.55°C (+1.00°F)
5th warmest
5th warmest
4th warmest
2002 (+1.11°C/2.00°F)
1998 (+0.51°C/0.92°F)
1998 (+0.69°C/1.24°F)
Northern Hemisphere
Land
Ocean
Land and Ocean
+1.06°C (+1.91°F)
+0.41°C (+0.74°F)
+0.67°C (+1.21°F)
6th warmest
2nd warmest
2nd warmest
2000 (+1.18°C/2.12°F)
1998 (+0.49°C/0.88°F)
1998 (+0.73°C/1.31°F)
Southern Hemisphere
Land
Ocean
Land and Ocean
+0.56°C (+1.01°F)
+0.34°C (+0.61°F)
+0.39°C (+0.70°F)
5th warmest
6th warmest
6th warmest
1998 (+1.05°C/1.90°F)
1998 (+0.54°C/0.97°F)
1998 (+0.63°C/1.13°F)

Click here for Global Land and Ocean Triad plot
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Click here for Global Hemisphere Triad plot
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January-May Anomaly Rank Warmest Year on Record
Global
Land
Ocean
Land and Ocean
+0.93°C (+1.70°F)
+0.39°C (+0.70°F)
+0.55°C (+1.00°F)
3rd warmest
4th warmest
3rd warmest
2002 (+1.25°C/2.25°F)
1998 (+0.52°C/0.94°F)
1998 (+0.71°C/1.28°F)
Northern Hemisphere
Land
Ocean
Land and Ocean
+1.05°C (+1.90°F)
+0.43°C (+0.77°F)
+0.68°C (+1.22°F)
4th warmest
2nd warmest
3rd warmest
2002 (+1.41°C/2.54°F)
1998 (+0.51°C/0.92°F)
1998 (+0.80°C/1.44°F)
Southern Hemisphere
Land
Ocean
Land and Ocean
+0.49°C (+0.88°F)
+0.38°C (+0.68°F)
+0.40°C (+0.72°F)
8th warmest
7th warmest
7th warmest
1998 (+0.90°C/1.62°F)
1998 (+0.54°C/0.97°F)
1998 (+0.61°C/1.10°F)

Click here for Global Land and Ocean Triad plot
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Click here for Global Hemisphere Triad plot
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The most current data may be accessed via the Global Surface Temperature Anomalies page.

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Top of Page Precipitation

The maps below represent anomaly values based on the GHCN data set of land surface stations using a base period of 1961-1990. The map to the left is precipitation anomalies measured in millimeters, the map to the right is the percentage of average (1961-1990) precipitation. During March-May 2004, much above average precipitation fell across southern India, central China, the Great Lakes region of the U.S. and Argentina. Below average precipitation was observed in eastern Australia, the Netherlands, southeastern U.S. and Turkey. During the month of May 2004, above average precipitation occurred in the Ohio Valley of the U.S., Chile, Japan and Thailand while drier than average conditions were observed in the central and southern Great Plains of the U.S., coastal Brazil, western Europe and eastern Australia.
Click here for Precipitation Dot map in Millimeters
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Click here for Percent Precipitation Dot map
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Top of Page ENSO SST Analysis




Click Here for the last week of the month's ENSO condtions Map
Click here for animated loop





  • Sea surface temperatures were again near-normal over much of the central and eastern equatorial Pacific (as shown in the adjacent animation of weekly sea surface temperature anomalies). A consensus of indices suggest neutral ENSO conditions. A comprehensive summary of May 2004 ENSO conditions can be found on the ENSO monitoring page. For the latest advisory on ENSO conditions go to NOAA's Climate Prediction Center (CPC) and the CPC ENSO Diagnostic Discussion

  • Images of sea surface temperature conditions are available for all months to date during 2004 at the weekly SST page

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References:

Peterson, T.C. and R.S. Vose, 1997: An Overview of the Global Historical Climatology Network Database. Bull. Amer. Meteorol. Soc., 78, 2837-2849.

Citing This Report

NOAA National Climatic Data Center, State of the Climate: Global Analysis for May 2004, published online June 2004, retrieved on September 19, 2014 from http://www.ncdc.noaa.gov/sotc/global/2004/5.