Weekly Global Climate Highlights Map for November 20, 1999

1. United States and Southern Canada:

UNUSUALLY MILD CONDITIONS OVERSPREAD REGION
Temperatures were 6°C to 10°C above normal from the Continental Divide eastward across the High Plains to the Missouri River while departures of +3°C to +6°C dominated the remainder of the Plains and most of the Intermountain West. Highs exceeded 20°C as far north as southern Alberta, with readings reaching 30°C in southeastern California, southern and central Arizona, southern and north-central Texas, and central Arkansas. The unusually high temperatures exacerbated dryness across the central United States (see Item 2 below) [WARM - Up to 4 weeks].

2. Central and Eastern United States and Southeastern Canada:

DRY ANOMALY EXPANDS AND STRENGTHENS
Little or no rain fell on most of the United States, Ontario, and southwestern Quebec. Precipitation totals of 10 to 50 mm were scattered across the southeastern United States, New England, and the lower St. Lawrence River Valley. Short-term (8-week) moisture shortages of 100 to 200 mm covered southeastern Texas, the lower and middle Mississippi River Valleys, and parts of the Northeast while deficits of 50 to 100 mm prevailed across the Great Plains and the Corn Belt [DRY - Up to 11 weeks].

3. Caribbean:

HURRICANE LENNY BRINGS STRONG WINDS AND HEAVY RAINS
An unusually late-season hurricane traversed the Caribbean Sea. Hurricane Lenny formed early in the week southeast of the Yucatan Peninsula, and by mid-week (November 17) the hurricane was packing winds of 240 kph with gusts approaching 300 kph. In addition to the lateness of the event, the eastward movement of the hurricane was highly unusual. Torrential rains (100 to 500 mm) inundated islands throughout the eastern Caribbean, but lesser amounts (25 to 100 mm) were reported further west. According to the media, several deaths and considerable damage resulted from the storm [Episodic Event].

4. Central South America:

WARMER WEATHER PREVAILS
Temperatures were within 3°C of normal across Bolivia and adjacent parts of western Paraguay, northern Argentina, and northern Chile [COLD - Ended at 4 weeks].

5. Northern Argentina:

PRECIPITATION SURPLUSES REMAIN
Moderate to heavy rains (25 to 100 mm) fell on northern Argentina from Mendoza and San Luis northward to southeastern  Catamarca and western Santiago Del Estero. Totals were below 25 mm elsewhere. Since late September, 100 to 675 mm of rain have fallen on the region, resulting in precipitation surpluses of 100 to 510 mm [WET - Up to 7 weeks].

6. East-Central South America:

STILL VERY DRY
Little or no rain fell on Uruguay and adjacent parts of northeastern Argentina during the past week. During the past 8 weeks, precipitation totaled less than 150 mm, yielding moisture deficits of 100 to 200 mm [DRY - Up to 11 weeks].

7. Northeastern Europe:

COLD WEATHER DISPLACES MILD CONDITIONS
Temperatures averaged 6°C to 10°C below normal across much of northern European Russia, with lows plummeting below -20°C at most locations north of 58°N, and reaching -50°C at Verhojansk (68°N). Meanwhile, weekly departures of -3°C to -6°C covered the remainder of the region, with lows dropping below -10°C across most of Russia, Belarus, and the northern Ukraine  [COLD - 2 weeks].

8. Southern Asia:

WARMTH ABATES
Weekly departures of +3°C to +5°C were limited to northwestern India and scattered locations, with near-normal temperatures prevailing over the remainder of the region [WARM - Up to 10 weeks].

9. Southeastern Asia:

  HEAVY RAINS ALONG VIETNAMESE COAST, DRY ELSEWHERE
Heavy rains (50 to 100 mm) fell along the coast of southern Vietnam while favorably dry weather prevailed across the remainder of the region. During the last 8 weeks, however, 300 to 2000 mm has drenched much of the region, resulting in surpluses of 140 to 800 mm for the period [WET - Up to 7 weeks].

10. Australia:

COLD ANOMALY CONTINUES
Weekly departures of -3°C to -5°C continued across most of Australia, with lows dropping to 2°C at Canberra  (35°S)  [COLD - Up to 4 weeks].

11. Northeastern Australia:

WETNESS SHIFTS EASTWARD
Unseasonably moderate to heavy rains (25 to 85 mm) soaked much of Queensland. The rainfall was 5 to 8 times the normal amount that falls during this period [WET - Up to 7 weeks].

12. Southeastern Australia:

DRY CONDITIONS PERSIST
No rain was reported as dry conditions continued in Tasmania and the southeastern corner of the continent [DRY - Up to 10 weeks].