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Active Tropical Systems Basin Outlooks Satellite
July 2004 Eastern Pacific Monthly Summary
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000
ABPZ30 KNHC 011509
TWSEP 
MONTHLY TROPICAL WEATHER SUMMARY
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
8 AM PDT SUN AUG 1 2004
 
FOR THE EASTERN NORTH PACIFIC...EAST OF 140 DEGREES WEST LONGITUDE..
 
AFTER A QUIET MONTH OF JUNE...FIVE TROPICAL CYCLONES DEVELOPED
DURING JULY...TWO HURRICANES...ONE TROPICAL STORM...AND TWO
TROPICAL DEPRESSIONS.  THE TOTAL OF FOUR NAMED STORMS SO FAR IN
2004 WHICH IS BELOW THE CLIMATOLOGICAL MEAN OF 6.2...AND THE TOTAL
OF TWO HURRICANES IS BELOW THE AVERAGE OF 3.0. 

TROPICAL DEPRESSION TWO-E FORMED FROM A TROPICAL WAVE THAT MOVED
ACROSS THE COAST OF AFRICA ON 17 JUNE. THE WAVE MOVED WESTWARD FOR
THE NEXT 2 WEEKS WITHOUT ANY SIGNIFICANT DEVELOPMENT. THE WAVE
DEVELOPED INTO A TROPICAL DEPRESSION ON 2 JULY ABOUT 750 MILES
SOUTHWEST OF CABO SAB LUCAS ON THE SOUTHERN TIP OF BAJA CALIFORNIA.
THE DEPRESSION MOVED QUICKLY WEST-NORTHWESTWARD TO WESTWARD OVER
COOLER WATERS AND DEGENERATED INTO A NON-CONVECTIVE LOW PRESSURE
SYSTEM LATE ON 3 JULY. THE REMNANT LOW DISSIPATED ABOUT 1350 MILES
WEST-SOUTHWEST OF CABO SAN LUCAS ON 5 JULY.

BLAS DEVELOPED ON 12 JULY ABOUT 410 MILES SOUTH-SOUTHEAST OF
MANZANILLO MEXICO FROM A TROPICAL WAVE THAT CROSSED CENTRAL AMERICA
ON 8 JULY. THE DEPRESSION QUICKLY STRENGTHENED INTO A TROPICAL
STORM. BLAS MOVED MOSTLY NORTHWESTWARD AND REACHED ITS MAXIMUM
INTENSITY OF 65 MPH ON 13 JULY. THIS WAS A LARGE TROPICAL STORM
WHICH...ALTHOUGH REMAINING WELL OFFSHORE...PRODUCED STRONG GUSTY
WINDS OVER PORTIONS OF SOUTHERN BAJA CALIFORNIA. CONTINUING
NORTHWESTWARD...BLAS WEAKENED BELOW STORM STRENGTH THE FOLLOWING
DAY. BY 15 JULY...THE SYSTEM DEGENERATED TO A LARGE REMNANT LOW
THAT PERSISTED OVER THE OPEN WATERS OF THE EAST PACIFIC FOR SEVERAL
MORE DAYS. 

CELIA FORMED FROM A VIGOROUS TROPICAL WAVE THAT MOVED ACROSS THE
WEST COAST OF AFRICA ON 5 JULY.  THE WAVE MOVED WESTWARD
UNEVENTFULLY UNTIL IT SPAWNED A TROPICAL DEPRESSION ON 19 JULY
ABOUT 690 MILES SOUTH OF CABO SAN LUCAS. IT BECAME A TROPICAL STORM
LATER THAT SAME DAY. THE CYCLONE MOVED GENERALLY WEST-NORTHWESTWARD
FOR THE NEXT WEEK AND GRADUALLY INTENSIFIED INTO A HURRICANE ON 22
JULY ABOUT 850 MILES WEST-SOUTHWEST OF CABO SAN LUCAS. CELIA
REACHED ITS PEAK INTENSITY OF 70 KT SHORTLY THEREAFTER BEFORE IT
BEGAN A GRADUAL WEAKENING TREND OVER COOLER WATERS. IT WEAKENED TO
A TROPICAL STORM ON 22 JULY...A TROPICAL DEPRESSION ON 24
JULY...AND INTO A NON-CONVECTIVE LOW PRESSURE SYSTEM ON 26 JULY.
THE CYCLONE EVENTUALLY DEGENERATED INTO AN OPEN WAVE LATER THAT DAY
ABOUT 1200 MILES EAST OF THE HAWAIIAN ISLANDS.

DARBY DEVELOPED FROM A TROPICAL WAVE THAT MOVED WESTWARD ACROSS THE
COAST OF AFRICA ON 12 JULY.  THE WAVE REACHED THE EASTERN PACIFIC
ON 20 JULY AND FIRST SHOWED SIGNS OF ORGANIZATION ON 24 JULY.
A TROPICAL DEPRESSION FORMED ON 26 JULY ABOUT 785 MILES
SOUTH-SOUTHWEST OF CABO SAN LUCAS...AND MOVED WEST-NORTHWESTWARD
AND STRENGTHENED TO A TROPICAL STORM THE NEXT DAY.  DARBY BECAME A
HURRICANE ON 28 JULY WITH MAXIMUM SUSTAINED WINDS REACHING AN
ESTIMATED 105 KT ON 29 JULY.  DARBY WAS THE FIRST MAJOR
HURRICANE IN THE EASTERN PACIFIC SINCE KENNA IN OCTOBER 2002. 
DARBY TURNED WESTWARD ON 30 JULY AS IT WEAKENED TO A TROPICAL
STORM...AND IT WEAKENED TO A DEPRESSION ON 31 JULY SHORTLY BEFORE IT
ENTERED THE CENTRAL PACIFIC TROPICAL CYCLONE BASIN.

TROPICAL DEPRESSION SIX-E WAS A SHORT-LIVED CYCLONE THAT FORMED
ABOUT 500 MILES SOUTH-SOUTHWEST OF THE CABO SAN LUCAS ON 29 JULY. 
IT DISSIPATED WITHIN 24 HOURS.

SUMMARY TABLE - JULY 2004

NAME             DATES            MAX WIND-KT          DEATHS
-------------------------------------------------------------------
TD TWO-E         2-3 JUL             30         0
TS BLAS          12-15 JUL           50                  0
H CELIA          19-25 JUL           70                  0
H DARBY          26 JUL-1 AUG       105                  0
TD SIX-E         29-30 JUL           25                  0
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NOTE: DATES ARE BASED ON UNIVERSAL COORDINATED TIME...UTC

FORECASTER STEWART/LAWRENCE/PASCH/BEVEN/FRANKLIN

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