November 2012 Climate Report

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

November 2012 Highlights

New Records for November 2012

Date	New Record	Previous Record
November 26th	A record warm minimum temperature of 80°F.	This broke the previous record of 77°F set back in 1982.
November 28th	A record high temperature of 88°F.	This tied the previous record of 88°F set back in 1993.
November 2012	November 2012 ended as the hottest November on record with an average temperature of 82.4°F.	This broke the previous record of 82.2°F set back in November 1980.
November 2012	November 2012 ended as the twelfth driest November on record with 3.09".	November 1954 ended as the driest November on record with 1.48".

Saint Thomas

Date	New Record	Previous Record
November 20th	A daily record rainfall of 2.35".	This broke the previous record of 1.45" set back in 1975.
November 26th	A record warm minimum temperature of 78°F.	This tied the previous record of 78°F set back in 2002.

Saint Croix

Date	New Record	Previous Record
November 19th	A daily record rainfall of 1.28".	This broke the previous record of 0.95" set back in 2002.
November 2012	November 2012 ended as the ninth warmest November on record with an average temperature of 81.2°F.	November 1997 ended as the hottest November on record with an average temperature of 83.2°F.
November 2012	November 2012 ended as the twelfth driest November on record with 2.77".	November 1976 ended as the driest November on record with 1.11".

November 2012 Statistics

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

	San Juan	Saint Thomas	Saint Croix
High	85.9°F	87.0°F	86.3°F
Low	75.2°F	75.2°F	75.0°F
Avg. T	80.6°F	81.1°F	80.7°F
Pcpn.	6.35’’	5.23’’	5.46’’

November 2012 Observations:

	San Juan	Saint Thomas	Saint Croix
High	87.8°F(+1.9°F)	86.2°F(-0.8°F)	87.9°F(+1.6°F)
Low	77.1°F(+1.9°F)	76.3°F(+1.1°F)	74.6°F(-0.4°F)
Avg. T	82.4 °F(+1.9°F)	81.3°F(+0.2°F)	81.2°F(+0.5°F)
Pcpn.	3.09" (-3.26")	5.76" (+0.53")	2.77" (-2.69")

November 2012 extremes:

	San Juan	Saint Thomas	Saint Croix
High	91°F November 07th	89°F November 02nd	90°F November 10th, 4th and 1st
Low	75°F November 30th, 24th, and 23rd	73°F November 30th	68°F November 30th

Monthly Summary

November 2012 began with a southeasterly wind flow across the local islands that produced warm temperatures along the northern coast of Puerto Rico mainly during the first week of the month. The prevailing east northeast wind flow returned around the 10th, and brought periods of morning showers across the local islands as well as limited afternoon convection across western Puerto Rico each day through the rest of the month. Overall a tranquil weather pattern prevailed.

Rainfall Accumulations Year to Date (YTD)

Figure A – Graphical Display of precipitation for November 2012 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.

Figure C – Graphical display of departure from normal precipitation YTD.

November Historical Statistics

Highest November Temperatures on record:

San Juan	Saint Thomas	Saint Croix
96°F November 6th 1981	95°F November 25th 1995	93°F November 8th 1993
95°F November 7th 1981	95°F November 1st 1993	93°F November 3rd 1960
93°F November 20th 1994	94°F November 23rd 1995	93°F November 2nd 1960

Lowest November Temperatures on record:

San Juan	Saint Thomas	Saint Croix
65°F November 9th 1989	61°F November 25th 1999	61°F November 12th 2005
66°F November 20th 1969	67°F November 22nd 1956	62°F November 13th 1983
66°F November 26th 1961	67°F November 11th 1954	62°F November 22nd 1982

Wettest Novembers:

San Juan	Saint Thomas	Saint Croix
15.96" November 1979	18.39" November 2003	18.03" November 2003
15.64" November 1931	14.73" November 1984	16.34" November 1974
15.04" November 1950	10.36" November 1987	13.25" November 1987

Driest Novembers:

San Juan	Saint Thomas	Saint Croix
1.48" November 1954	0.78" November 1962	1.11" November 1976
1.63" November 1910	0.90" November 1963	1.75" November 1964
1.91" November 1980	1.35" November 1980	1.86" November 1997

Decadal November Observations for San Juan, Puerto Rico

	2010-2012	2000’s	1990’s	1980’s	1970’s	1960’s
High	86.0°F	85.7°F	86.4°F	86.3°F	86.0F	85.3°F
Low	75.7°F	74.6°F	74.4°F	74.2°F	75.1°F	72.5°F
Avg. T	80.9°F	80.1°F	80.4°F	80.3°F	80.6°F	78.9°F
Pcpn.	5.26"	6.51’’	7.06’’	4.86’’	7.01’’	5.88’’

Looking ahead toward the month of December

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

	San Juan	Saint Thomas	Saint Croix
High	83.9°F	85.6°F	84.7°F
Low	73.4°F	73.5°F	73.4°F
Avg. T	78.7°F	79.5°F	79.0°F
Pcpn.	5.02’’	2.96’’	2.97’’

Moon/Sun/Tide Data for the Month of December 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.

National Weather Service Weather Forecast Office