Weekly Global Climate Highlights

1. California:

COOL WEATHER PERSISTS Weekly departures of -2°C to -3°C continued to dominate much of California. The mercury failed to reach 30°C at coastal locations, but reached 40°C in the southeastern deserts. Lows ranged from 10°C to 20°C at most locations across most of the state [COLD - Up to 3 weeks].

2. South-Central United States:

UNUSUALLY DRY CONDITIONS AGGRAVATED BY HIGH TEMPERATURES Scanty rainfall totals (less than 10 mm) dominated the southern Plains again last week, except for isolated light to moderate showers in central Oklahoma and southwestern Texas. During June and the first 4 weeks of July, fewer than 50 mm of rain has fallen on the region, yielding precipitation deficits of 50 to 150 mm. See the United States Drought Monitor for more details [DRY - Up to 9 weeks]. High temperatures (exceeding 40°C at many locations) and weekly temperature departures of +2°C to +3°C exacerbated the dryness across the western portions of Texas and Oklahoma while the mercury remained above 20°C throughout the southern Plains [WARM - Up to 5 weeks].

3. West Virginia:

HEAVY RAINS TRIGGER SIGNIFICANT FLOODING Between 100 and 200 mm of rain inundated parts of West Virginia. According to press reports, serious flooding resulted from the heavy rainfall [Episodic Event].

4. Mid-Atlantic States:

COLD ANOMALY ABATES Weekly temperatures were within 2°C of normal this past week as unusually cool weather eased. Highs were generally in the thirties (°C) and lows were in the teens (°C) [COLD - Up to 4 weeks].

5. Northeastern United States:

STILL VERY DRY Light precipitation (25 to 50 mm) brought limited relief to parts of eastern Illinois, southern Michigan, Indiana, Ohio, and southwestern Pennsylvania, but most of the region received little or none. Precipitation totals for June and July generally ranged from 50 to 150 mm, with shortfalls of 100 to 200 mm dominating northern Ohio, southeastern Michigan, western Pennsylvania, and western New York. See the United States Drought Monitor for more details [DRY - Up to 6 weeks].

6. Southern Mexico and Central America:

MOISTURE DEFICITS REPORTED Scattered moderate showers dropped 50 to 100 mm on a few locations, but most of southern Mexico and Central America received fewer than 50 mm, allowing 8-week precipitation shortfalls of 100 to 370 mm to accumulate [DRY - 12 weeks].

7. Central South America:

DRY ANOMALY DEVELOPS Scanty precipitation totals (less than 25 mm) were observed across much of Paraguay and northern Argentina this past week. Accumulations for the month of July were less than 15% of the expected totals for the month [DRY - Up to 6 weeks].

8. East-Central Europe:

HEAVY RAINS REPORTED Torrential rains (100 to 200 mm, with locally higher amounts) drenched southern Poland and eastern Slovakia this past week while moderate rains dominated the remainder of the region. During the last 8 weeks, 180 to 500 mm of rain has fallen on east-central Europe, generating moisture excesses of 50 to 200 mm [WET - Up to 9 weeks].

9. Eastern European Russia and Southwestern Asia:

WARM ANOMALY CONTINUES Temperature departures of +2°C to +5°C prevailed over most of the region, with departures of up to +8°C reported in southern Russia. The mercury soared to 36°C as far north as Sumy, Russia (51°N) [WARM - Up to 11 weeks].

10. Southern Africa:

COLD ANOMALY DEVELOPS Temperatures averaged 2°C to 4°C below normal across southern Africa, with subfreezing lows reported at most interior locations. The mercury reached -8°C in parts of interior South Africa. Highs were generally in the twenties (°C) [COLD - 2 weeks].

11. Western Asian Russia and North-Central Kazakhstan:

WETNESS CONTINUES IN PARTS OF REGION; COLD ANOMALY DEVELOPS Showers again brought light to moderate rains (10 to 40 mm) to southwestern Siberia. Little or no precipitation, however, fell on north central Kazakhstan, easing recent wetness. Since June 3rd, rainfall totaled 130 to 270 mm in much of the region, yielding moisture excesses of up to 150 mm [WET - Up to 16 weeks]. Unseasonably cool conditions persisted over southwestern Siberia and northern Kazakhstan, with temperatures averaging 2°C to 6°C below normal. The mercury dropped into the single digits (°C) across the entire region [COLD - Up to 3 weeks].

12. South-Central Asia:

COOL CONDITIONS DIMINISH; HEAVY RAINS CAUSE FLOODING Temperatures averaged 1°C to 2°C below normal in Rajasthan, Gujarat, and the western portions of Madhya Pradesh and Maharashtra [COLD - Up to 8 weeks]. Monsoon rains (100 t0 500 mm) caused flooding in some areas of Pakistan and northern India [Episodic Events].

13. Eastern Siberia:

DRYNESS DEVELOPS Little or no rain fell again across northeastern Siberia. During the past 8 weeks, less than 60 mm has fallen in the area, allowing moisture deficits of 50 to 80 mm to accumulate [DRY - Up to 9 weeks].

14. North-Central and East-Central Asia:

LARGE WARM ANOMALY CONTINUES Weekly temperature departures of +2°C to +6°C persisted over an area extending from north-central Siberia southeastward across central and east-central China to Japan. The mercury reached 36°C as far north as Seymchan, Russia (63°N), and climbed to as high as 40°C at Maebashi, Japan (36°N) [WARM - Up to 15 weeks].

15. China, Korea, and Japan:

THUNDERSTORMS EASE DRYNESS Thunderstorms brought heavy rains of up to 210 mm and greatly reduced dryness in parts of the region extending from northern Sichuan eastward to the central Korean Peninsula. Little or no rain, however, fell over much of the remainder of the area. Precipitation shortfalls of 50 to 250 mm have been reported across the region during the past 8 weeks [DRY - Up to 9 weeks].

16. Southeastern China and Northern Vietnam:

TYPHOON DRENCHES REGION WITH HEAVY RAIN Typhoon Yutu brought heavy to torrential rains (50 to 250 mm) to China's Provinces of Guangdong and Guangxi and to northern Vietnam. During the last 8 weeks, 300 to 2200 mm has inundated much of the area, yielding moisture excesses of 100 to 1600 mm [WET - Up to 11 weeks].

17. Southwestern Australia:

UNUSUALLY DRY CONDITIONS PREVAIL For the second consecutive week, little or no rain fell on the southwestern portion of Western Australia. Since the beginning of June, only 120 to 150 mm of rain fell on the vicinity of Perth, allowing moisture shortages of 170 to 220 mm to accumulate [DRY - Up to 9 weeks].

18. Southeastern Australia:

MORE DRY WEATHER Fewer than 10 mm of rain was reported across Victoria and Tasmania during the past week; however, 8-week moisture deficits were only 50 to 100 mm [DRY - Up to 6 weeks].