1. Western United States and Adjacent Canada:

STILL UNUSUALLY COOL

Weekly departures of -2°C to -7°C dominated California. Highs above 30°C were restricted to extreme southeastern California while readings were in the twenties (°C) elsewhere [COLD - Up to 4 weeks].

2. North-Central United States and South-Central Canada:

UNUSUALLY WET WEATHER DEVELOPS

Highly variable precipitation (10 to 100 mm) was reported across the region during the past week. Four-week precipitation totals of 50 to 150 mm were among the highest 10% of the climatological distribution [WET - Up to 6 weeks].

3. California:

RAINS ABATE

Fewer than 25 mm of rain fell on California during the past week. During the past 3 months, 200 to 400 mm of precipitation has accumulated in California, yielding moisture surpluses of 50 to 200 mm [WET - Ending at 11 weeks].

4. Texas and Adjacent Mexico:

STILL VERY DRY

With severe weather concentrated to the north and east, Texas received little or no rain again last week. Fewer than 100 mm of rain has fallen on Texas during the last 8 weeks, resulting in short-term moisture deficits of 50 to 140 mm [DRY - Up to 9 weeks].

5. Central and Eastern United States:

SEVERE WEATHER AND HEAVY RAINS BATTER REGION

Several tornado outbreaks claimed many lives and caused considerable damage in the southern and central United States, according to media reports [Episodic Events]. Moderate to severe thunderstorms delivered 50 to 200 mm of rain to the central United States from central Alabama northward to the southern protions of Wisconsin and Michigan. Between March 16 and May 10, frequent storms delivered 100 to 450 mm of precipitation, resulting in short-term moisture excesses of 50 to 250 mm [WET - Up to 8 weeks].

6. East-Central South America:

A FAVORABLY DRY WEEK

Little or no precipitation fell on Uruguay and northeastern Argentina during the past week. Between 100 and 500 mm of precipitation has fallen on the region during the last 8 weeks, yielding precipitation surpluses of 50 to 300 mm [WET - Up to 9 weeks].

7. Europe and Northern Africa:

ABOVE-NORMAL TEMPERATURES PREVAIL

Temperatures averaged 3°C to 9°C above normal last week, with locally higher temperature departures approaching +15°C in Germany, Italy, and Austria. Highs exceeded 30°C as far north as central Germany while subfreezing lows were restricted to the higher elevations of the Alps [WARM - Up to 6 weeks].

8. Europe:

STILL VERY DRY

Little or no rain fell on most of the Continent; however, light to moderate rains (10 to 50 mm) provided some relief to central Europe from eastern France eastward to Austria. Heavier amounts (50 to 100 mm) fell on southwestern France. Most of Europe has received less than 150 mm of precipitation since February 9, with precipitation shortfalls ranging from 50 to 325 mm [DRY - Up to 15 weeks].

9. Niger:

BELOW-NORMAL TEMPERATURES REPORTED

Weekly temperature departures ranged from -2°C to -3°C last week, with readings dropping below 20°C. Despite the below normal temperatures, highs were generally in the forties (°C) [COLD - Up to 3 weeks].

10. Kenya and Tanzania:

ABUNDANT RAINS CONTINUE

Between 25 and 100 mm of rain soaked southern Kenya and northern Tanzania last week. Four-week totals of 100 to 500 mm of rain were among the highest 10% of the climatological distribution [WET - Up to 6 weeks].

11. Southwestern Asia:

TEMPERATURES MODERATE

Temperatures were only 2°C to 4°C below normal last week. Highs were in the twenties and thirties (°C), and the mercury remained above the freezing mark [COLD - Ending at 9 weeks].

12. South-Central Siberia:

UNUSUALLY COLD WEATHER REPORTED

Temperatures averaged 2°C to 7°C below normal last week. The mercury plummeted below -10°C at most locations and reached -20°C east of Lake Baykal [COLD - 2 weeks].

13. Korea and East-Central China:

WET ANOMALY DEVELOPS

Moderate to heavy rains (25 to 100 mm) fell on China from eastern Sichuan northeastward through Shandong and across most of the Korean Peninsula. Torrential rains (100 to 200 mm) deluged southern Anhui and northern Jiangxi in China and the northern portion of South Korea. Since the middle of March, 150 to 600 mm of precipitation has accumulated, resulting in moisture excesses of 50 to 200 mm, with locally higher surpluses reaching 415 mm [WET - Up to 7 weeks].

14. East-Central and Southeastern Asia:

STILL UNUSUALLY WARM

Weekly temperature departures of +2°C to +5°C covered the southern and eastern portions of China, the Korean Peninsula, and most of southeastern Asia. Highs were in the thirties (°C) south of 30°N and in the twenties (°C) elsewhere. The mercury generally remained above freezing, except in the extreme northern fringes of Korea [WARM - Up to 8 weeks].