ZCZC MIATWSEP
TTAA00 KNHC 011533
MONTHLY TROPICAL WEATHER SUMMARY
NATIONAL WEATHER SERVICE MIAMI FL
8 AM PST WED DEC 1 1999
FOR THE NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE...
...SUMMARY OF TROPICAL CYCLONE ACTIVITY DURING 1999...
THE EASTERN PACIFIC HURRICANE SEASON OF 1999 WAS ONE OF THE MOST
INACTIVE ON RECORD. ONLY NINE TROPICAL STORMS FORMED...WITH SIX OF
THEM BECOMING HURRICANES AND TWO BECOMING MAJOR HURRICANES...WINDS
100 KT OR GREATER. THIS COMPARES WITH THE LONG-TERM AVERAGE OF 16
NAMED STORMS...NINE HURRICANES...FOUR MAJOR HURRICANES. THE
1999 SEASON TIES 1966 AS THE SECOND-LEAST-ACTIVE SEASON SINCE
THE SATELLITE ERA BEGAN IN 1966. ONLY 1977...WITH EIGHT TROPICAL
CYCLONES...HAD LESS ACTIVITY.
HURRICANE GREG WAS THE ONLY STORM TO HIT LAND IN 1999...CROSSING THE
SOUTHERN TIP OF BAJA CALIFORNIA AS A TROPICAL STORM ON 7 SEPTEMBER.
HURRICANES DORA AND EUGENE CROSSED 140W INTO THE CENTRAL PACIFIC...
WITH DORA LATER CROSSING INTO THE WESTERN PACIFIC. DORA IS THE
FIRST TROPICAL CYCLONE TO MOVE ACROSS ALL THREE PACIFIC BASINS SINCE
HURRICANE JOHN IN 1994.
INDIVIDUAL STORMS...
HURRICANE ADRIAN DEVELOPED FROM A TROPICAL DEPRESSION THAT FORMED
ABOUT 225 N MI SOUTHEAST OF ACAPULCO MEXICO ON 18 JUNE. IT MOVED
WEST-NORTHWESTWARD AND BECOME A TROPICAL STORM LATER THAT DAY AND AN
85-KT HURRICANE ON 20 JUNE. THE CYCLONE PASSED NEAR SOCORRO ISLAND
AS A WEAKENING TROPICAL STORM ON 21 JUNE AND DISSIPATED ABOUT 300 N
MI SOUTHWEST OF THE SOUTHERN TIP OF BAJA CALIFORNIA THE NEXT DAY.
ALTHOUGH ADRIAN DID NOT MAKE LANDFALL...OUTER RAINBANDS SPREAD OVER
WESTERN MEXICO CAUSING TWO DEATHS FROM FLASH FLOODING. FOUR OTHER
DEATHS WERE ATTRIBUTED TO HIGH SURF.
HURRICANE BEATRIZ BEGAN AS A DEPRESSION ABOUT 300 N MI
SOUTH OF LAZARO CARDENAS MEXICO ON 9 JULY. IT MOVED WEST-
NORTHWESTWARD AND BECAME A TROPICAL STORM LATER THAT DAY. BEATRIZ
MOVED WESTWARD ON 11 JULY AS IT BECAME A HURRICANE. THIS WAS
FOLLOWED BY A WEST-NORTHWESTWARD MOTION AND AN ESTIMATED PEAK
INTENSITY OF 105 KT ON 13 JULY. BEATRIZ EVENTUALLY DISSIPATED ABOUT
1100 N MI EAST OF THE HAWAIIAN ISLANDS ON 17 JULY.
TROPICAL STORM CALVIN DEVELOPED FROM A DEPRESSION THAT FORMED ABOUT
560 N MI SOUTHWEST OF THE SOUTHERN TIP OF BAJA CALIFORNIA ON 25
JULY. IT BECAME A TROPICAL STORM LATER THAT DAY AS IT MOVED
WEST-NORTHWESTWARD. CALVIN TURNED NORTHWESTWARD AND WEAKENED TO A
DEPRESSION ON 26 JULY...AND IT DISSIPATED THE NEXT DAY.
HURRICANE DORA FIRST DEVELOPED INTO A DEPRESSION ABOUT 290 N
MI SOUTH OF ACAPULCO MEXICO ON 6 AUGUST. THE SYSTEM MOVED WEST-
NORTHWESTWARD UNTIL 8 AUGUST...THEN MOVED WESTWARD UNTIL ENTERING
THE CENTRAL PACIFIC BASIN ON 14 AUGUST. THE CYCLONE BECAME A
TROPICAL STORM ON 7 AUGUST...BECAME A HURRICANE THE NEXT DAY...AND
REACHED AN ESTIMATED PEAK INTENSITY OF 120 KT ON 12-13 AUGUST. DORA
CONTINUED WESTWARD ACROSS THE CENTRAL PACIFIC...PASSING SOUTH OF
HAWAII AND CROSSING INTO THE WESTERN PACIFIC AS A TROPICAL STORM ON
20 AUGUST. IT DISSIPATED ABOUT 550 N MI NORTH-NORTHWEST OF WAKE
ISLAND ON 23 AUGUST.
HURRICANE EUGENE FORMED AS A DEPRESSION NEAR 12N 120W ON 6
AUGUST. THE CYCLONE BECAME A TROPICAL STORM LATER THAT DAY AS IT
MOVED WEST-NORTHWESTWARD. EUGENE TURNED TOWARD THE WEST AND BECAME A
HURRICANE ON 8 AUGUST...REACHING AN ESTIMATED PEAK INTENSITY OF 95
KT ON 10 AUGUST. EUGENE CROSSED INTO THE CENTRAL PACIFIC BASIN ON 11
AUGUST. IT WEAKENED TO A TROPICAL STORM AND THEN PASSED WELL SOUTH
OF THE HAWAIIAN ISLANDS. EUGENE EVENTUALLY DISSIPATED ABOUT 550 N
MI SOUTHWEST OF HAWAII ON 15 AUGUST.
TROPICAL STORM FERNANDA FIRST DEVELOPED INTO A DEPRESSION ABOUT 400
N MI SOUTH-SOUTHWEST OF SOCORRO ISLAND ON 17 AUGUST. THE CYCLONE
MOVED WEST-NORTHWESTWARD...REACHING TROPICAL STORM STRENGTH ON 18
AUGUST AND AN ESTIMATED PEAK INTENSITY OF 55 KT THE NEXT DAY. IT
THEN TURNED WEST-SOUTHWEST AND WEAKENED...EVENTUALLY DISSIPATING
ABOUT 1300 N MI WEST-SOUTHWEST OF THE SOUTHERN TIP OF BAJA
CALIFORNIA ON 22 AUGUST.
HURRICANE GREG FORMED AS A DEPRESSION JUST OFFSHORE FROM MANZANILLO
MEXICO ON 5 SEPTEMBER. IT TRACKED NORTHWESTWARD AND REACHED MINIMAL
HURRICANE STRENGTH THE NEXT DAY. GREG WEAKENED TO A TROPICAL STORM
BEFORE MAKING LANDFALL OVER CABO SAB LUCAS ON 7 SEPTEMBER. IT THEN
TRACKED WEST-NORTHWESTWARD AND DISSIPATED ABOUT 150 N MI
WEST-NORTHWEST OF CABO SAN LUCAS ON 9 SEPTEMBER. GREG PRODUCED HEAVY
RAINS OVER PORTIONS OF WESTERN AND NORTHWESTERN MEXICO...AND THE
RESULTING FLOODING KILLED NINE PEOPLE.
HURRICANE HILARY DEVELOPED FROM A TROPICAL DEPRESSION THAT FORMED
ABOUT 280 N MI SOUTH-SOUTHWEST OF MANZANILLO MEXICO ON 17 SEPTEMBER.
IT BECAME A TROPICAL STORM THE NEXT DAY WHILE MOVING
WEST-NORTHWESTWARD. HILARY TURNED NORTH-NORTHWESTWARD ON 19
SEPTEMBER AND BECAME A MINIMAL HURRICANE THE NEXT DAY. THE CYCLONE
EVENTUALLY DISSIPATED ABOUT 130 N MI WEST OF CENTRAL BAJA CALIFORNIA
ON 22 SEPTEMBER.
TROPICAL STORM IRWIN BEGAN AS A DEPRESSION ABOUT 150 N MI
SOUTH-SOUTHWEST OF MANZANILLO MEXICO ON 8 OCTOBER. IT MOVED
NORTHWARD AND BECAME A TROPICAL STORM LATER THAT DAY. IRWIN TURNED
WEST-NORTHWESTWARD THE NEXT DAY AS IT REACHED AN ESTIMATED PEAK
INTENSITY OF 50 KT. THE CYCLONE PASSED NEAR SOCORRO ISLAND ON 10
OCTOBER AS A WEAKENING DEPRESSION....AND IT DISSIPATED THE NEXT DAY
ABOUT 400 N MI SOUTHWEST OF THE SOUTHERN TIP OF BAJA CALIFORNIA.
SUMMARY TABLE
MAXIMUM WIND
NAME DATES (KNOTS) DEATHS
------- --------------- ------------- -------
ADRIAN 18 JUN - 22 JUN 85 6
BEATRIZ 9 JUL - 17 JUL 105
CALVIN 25 JUL - 27 JUL 35
DORA 6 AUG - 23 AUG 120
EUGENE 6 AUG - 15 AUG 95
FERNANDA 17 AUG - 22 AUG 55
GREG 5 SEP - 9 SEP 65 9
HILARY 17 SEP - 22 SEP 65
IRWIN 8 OCT - 11 OCT 50
AVILA/BEVEN/FRANKLIN/GUINEY/LAWRENCE/PASCH
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