April 2012 Climate Report for Puerto Rico and the U.S. Virgin Islands

April 2012 Highlights

New Records for April 2012

San Juan 

Date

New Record

Old Record

April 2012

Ninth warmest April on record with an average temperature of 80.5°F

April 1984 ended as the warmest April on record with an average temperature of 84.0°F

2012

2012 represents the seventh wettest start to a year with a total of 20.27".

1915 represents the wettest start to a year with a total of 22.80".

Saint Thomas

Date

New Record

Old Record

April 2012

Eleventh coolest April on record with an average temperature of 79.0°F

April 1955 ended as the coolest April on record with an average temperature of 77.3°F

2012

2012 represents the tenth wettest start to a year with a total of 9.55".

2003 represents the wettest start to a year with a total of 14.90".

Saint Croix

Date

New Record

Old Record

2012

2012 represents the ninth wettest start to a year with a total of 10.01".

1963 represents the wettest start to a year with a total of 13.99".

Other notable temperatures and precipitation amounts

Notable April 2012 High's

Notable April 2012 Low's

 95°F   Levittown   April 25th

50°F   Adjuntas AES   April 20th 

 94°F   Gurabo AES   April 4th

 54°F   Cerro Maravilla   April 11th

 

Puerto Rico

Virgin Islands

Highest 24 hr Precip Total

4.23" Maricao April 10th 

 0.87" East End April 9th

Highest Weekly Rainfall Accum.

  6.46" Adjuntas AES  April 7th-13th

1.89" Charlotte Amalie   April 7th-13th

April 2012 Statistics

 Average April Temperatures/Precipitation (NCDC 1981-2010 averages):

 

San Juan

Saint Thomas

Saint Croix

High

86.2°F

87.0°F

85.7°F

Low

74.4°F

74.3°F

74.2°F

Avg. T

80.3°F

80.6°F

80.0°F

Pcpn.

4.68’’

2.74’’

2.13’’

  April 2012 Observations:

 

San Juan

Saint Thomas

Saint Croix

High

86.3°F(+0.1°F)

83.6°F(-3.4°F)

85.0°F(-0.7°F)

Low

74.8°F(+0.4°F)

 74.5°F(+0.2°F)

73.4°F(-0.8°F)

Avg. T

80.6°F(+0.3°F)

79.0°F(-1.6°F)

79.2°F(-0.8°F)

Pcpn.

5.30"(+0.62")

2.61" (-0.13")

1.60"(-0.53")

 April 2012 Extremes:

 

San Juan

Saint Thomas

Saint Croix

High

 92°F April 24th, and 12th

 86°F April 28th, and 21st

 88°F April 30th, and 29th

Low

71°F April 19th 

 71°F April 3rd

 69°F April 19th, 18th, and 3rd

Monthly Summary 

A generally fair and mainly dry weather pattern prevailed across the forecast area the first week of the month with just light morning showers across the windward side of the local islands and limited afternoon convection across the interior and western portions of Puerto Rico. By mid-month, shower intensity and coverage increased across the local islands due to a cold front which combined with a mid to upper level trough. By the end of the month, another round of fair weather conditions prevailed across the local islands with unseasonably warm temperatures between April 22nd and April 24th.

 Rainfall Accumulations Year to Date (YTD)    

 

  Figure A – Graphical Display of April 2012 precipitation across Puerto Rico and the U.S. Virgin Islands derived from a combination of rain gage and radar data.

 

Figure B – Graphical Display of YTD precipitation across Puerto Rico and the U.S. Virgin Islands derived from a combination of rain gage and radar data  

Coloso Rincon Calero Camp Isabella AES Mora Camp Borinquen Airport Guajataca Dam Arecibo Observatory Dos Bocas Manati 2E Palmarejo Morovis Corozal AES Negro Corozal Toa Baja Levittown Charlotte Amalie Wintberg Redhook Bay Cruz Bay Coral Bay East Hill Montpellier Beth Upper New Works Fort Christiansted Christiansted Airport East End Rio Piedras AES Trujillo Alto LMM Airport Canovanas Palma Sola Roosevelt Roads Paraiso Rio Blanco Lower Juncos Gurabo AES San Lorenzo Jajome Alto Aguirre Santa Isabel Aibonito Guayama Ponce 4E Juana Diaz Camp Boca Ensenada Magueyes Island Lajas AES Santa Rita Yauco Sabana Grande Hacienda Constanza Mayaguez City Maricao 2 SSW Maricao Fish Hatchery Adjuntas AES Adjuntas 1 NW Corral Viejo Penuelas Cacaos Orocovis Cerro Maravilla Villalba Aceituna Toro Negro Forest

Sector
Rain YTD
Normal YTD
PON YTD

 

 
 
X North Coast
21.23
13.80
154%
X South Coast
10.93
4.12
265%
X North Slopes
18.03
12.89
140%
X South Slopes
14.47
9.32
155%
X East Interior
26.46
16.10
164%
X West Interior
25.99
15.58
164%
Puerto Rico Average
19.44
11.97
162%
X U.S. Virgin Islands
9.03
7.85
115%

 PON= Percent of Normal YTD= Year to Date   

  Figure C – Display of YTD precipitation by climate sectors derived from rain gage data.

April Historical Statistics              

Highest April Temperatures on record:

San Juan

Saint Thomas

Saint Croix

 97°F April 17th,1983 96°F April 4th, 1996   93°F April 30th, 1973
95°F April 24th,1983  96°F April 29th, 1994   93°F April 21st, 1961
95°F April 22nd,1983   96°F April 30th, 1992  92°F April 19th, 1973

Lowest  April Temperatures on record:

San Juan

Saint Thomas

Saint Croix

 64°F April 12th,1968 62°F April 10th, 1984   62°F April 3rd 1982
65°F April 8th,1965 62°F April 11th, 1972   62°F April 2nd 1982
 65°F April 25th,1963 65°F April 9th, 1984   62°F April 15th, 1974

Wettest Aprils:

San Juan

Saint Thomas

Saint Croix

15.00"   2005  11.20"   2005  8.53"   2003 
13.17"   1915 9.07"   1983 8.24"   1986
10.37"   1988 6.66"   1978 5.38"   1952

Driest Aprils:

San Juan

Saint Thomas

Saint Croix

0.08"   1997  0.23"   1953   0.00"   1988
0.28"   1984  0.48"   1985   0.02"   1997
0.42"   1935  0.54"   2004 0.22"   1953 

Decadal April Observations for San Juan, Puerto Rico

 

2010-2012

2000’s

1990’s

1980’s

1970’s

1960’s

High

86.9°F

85.8°F

86.3°F

87.1°F

85.7°F

84.6°F

Low

74.5°F

73.5°F

73.3°F

73.3°F

73.7°F

71.5°F

Avg. T

80.2°F

79.6°F

79.8°F

80.2°F

79.7°F

78.1°F

Pcpn.

3.85"

6.32’’

2.90’’

4.71’’

3.50’’

3.55’’

Looking ahead toward the month of May

Average May Temperatures/Precipitation (NCDC 1981-2010 averages):

 

 

San Juan

Saint Thomas

Saint Croix

High

87.5°F

87.6°F

86.7°F

Low

76.3°F

76.2°F

76.1°F

Avg. T

81.9°F

81.9°F

81.4°F

Pcpn.

5.90’’

3.06’’

4.15’’

 

 Moon/Sun/Tide Data for the month of May 2012   

Sunrise/sunset data, phase of the moon, as well as tide data can all be found by going to the climate portion of the National Weather Service San Juan Climate homepage and then clicking on the astronomical tab

Click here to return to NWS San Juan Local Climate Web Page


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