Global Analysis - April 2004


Global Highlights:

  • Based on preliminary data for April 2004, global average combined land and sea surface temperature was third warmest on record
  • April temperatures were above average throughout Scandinavia, the western United States, Alaska and India, with below average temperatures in the southern U.S., western Russia and the Carribean
  • Precipitation during April was above average across the southern Great Plains of the U.S., western Europe and the United Kingdom with drier than average conditions across Japan, coastal Brazil and the Pacific Northwest of the U.S.
  • Near-normal SSTs across the central and eastern equatorial Pacific basin are 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 map below uses anomalies that were calculated from the Global Historical Climatology Network (GHCN) data set of land surface stations using a 1961-1990 base period. This map indicates above average temperatures across eastern Asia, most of Australia, Alaska and the western United States, while cooler than average temperatures occurred in Mexico, portions of Canada and the southeastern U.S.

The mean position of upper level ridges of high pressure and troughs of low pressure (depicted by positive and negative 500 millibar height anomalies during April 2004) 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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Top of PageTemperature Rankings and Graphics

Current Month / Year-to-date
April Anomaly Rank Warmest Year on Record
Global
Land
Ocean
Land and Ocean
+0.84°C (+1.51°F)
+0.39°C (+0.70°F)
+0.52°C (+0.94°F)
5th warmest
3rd warmest
3rd warmest
1998 (+1.24°C/2.32°F)
1998 (+0.51°C/0.92°F)
1998 (+0.73°C/1.31°F)
Northern Hemisphere
Land
Ocean
Land and Ocean
+0.79°C (+1.42°F)
+0.47°C (+0.85°F)
+0.60°C (+1.08°F)
9th warmest
warmest
3rd warmest
1998 (+1.26°C/2.27°F)

1998 (+0.78°C/1.40°F)
Southern Hemisphere
Land
Ocean
Land and Ocean
+0.74°C (+1.33°F)
+0.35°C (+0.63°F)
+0.42°C (+0.76°F)
4th warmest
7th warmest
5th warmest
1998 (+1.09°C/1.96°F)
1998 (+0.56°C/1.01°F)
1998 (+0.66°C/1.19°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-April Anomaly Rank Warmest Year on Record
Global
Land
Ocean
Land and Ocean
+1.01°C (+1.82°F)
+0.40°C (+0.72°F)
+0.59°C (+1.06°F)
3rd warmest
4th warmest
3rd warmest
2002 (+1.38°C/2.49°F)
1998 (+0.52°C/0.94°F)
1998 (+0.73°C/1.31°F)
Northern Hemisphere
Land
Ocean
Land and Ocean
+1.12°C (+2.02°F)
+0.45°C (+0.81°F)
+0.72°C (+1.30°F)
4th warmest
2nd warmest
3rd warmest
2002 (+1.61°C/2.90°F)
1998 (+0.51°C/0.92°F)
2002 (+0.86°C/1.55°F)
Southern Hemisphere
Land
Ocean
Land and Ocean
+0.58°C (+1.04°F)
+0.39°C (+0.70°F)
+0.43°C (+0.77°F)
6th warmest
7th warmest
6th warmest
1998 (+0.88°C/1.58°F)
1998 (+0.54°C/0.97°F)
1998 (+0.60°C/1.08°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 April 2004, much above average precipitation fell across the southern Great Plains of the U.S., France, southeastern Brazil and Uruguay. Below average precipitation was observed across Malaysia, the southeastern U.S., the northern Great Plains of the U.S. and Japan.
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 April 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 April 2004, published online May 2004, retrieved on December 20, 2014 from http://www.ncdc.noaa.gov/sotc/global/2004/4.