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Pan Evaporation Data for North Carolina

NOAA Technical Report NWS 34, Mean Monthly, Seasonal, and Annual Pan Evaporation for the US, R. K. Farnsworth and E. S. Thompson, Dec. 1982

Estimated monthly values for NWS sites (in inches)

Station	J	F	M	A	M	J	J	A	S	O	N	D	Annual
Cape Hatteras WSO	2.12	2.42	3.69	5.44	6.69	7.07	7.59	6.57	5.64	4.05	2.91	2.26	56.45
Charlotte WSO	1.95	2.44	4.07	6.04	7.16	7.63	7.64	7.06	5.45	3.87	2.70	2.07	58.08
Greensboro WSO	1.82	2.21	3.95	5.25	6.41	6.72	6.69	6.21	4.64	3.49	2.47	1.86	51.72
Raleigh Durham Airport	2.01	2.44	4.07	5.81	6.37	6.87	6.89	6.25	4.88	3.56	2.71	2.15	54.29
Wilmington WSO	2.10	2.64	4.21	6.35	7.31	7.24	7.53	6.40	5.34	4.00	2.86	2.39	58.35
Winston-Salem Airport	2.14	2.44	4	6	7	7	7	6	5	4	3	2	56

Measured monthly values from pan evaporation stations ( in inches)

Station	J	F	M	A	M	J	J	A	S	O	N	D	Annual
Cataloochee	-	-	-	3.58	3.86	4.08	4.14	3.94	2.88	2.39	-	-	-
Chapel Hill 2 W	1.55	1.84	3.58	4.85	5.60	6.14	6.20	5.64	4.48	3.15	1.99	1.43	46.45
Lumberton 6 NW	2.52	2.78	4.83	6.65	7.23	7.42	7.63	6.86	5.23	4.24	2.77	1.96	60.12
Maysville Hoffman Forest	1.81	2.57	3.97	5.65	6.55	6.54	6.88	6.16	4.54	3.35	2.24	1.58	51.84
Murphy	1.09	1.46	2.90	4.19	5.16	5.57	5.07	5.05	3.87	2.77	1.60	1.02	39.75
W. Kerr Scott Reservoir	-	-	-	5	5.42	5.91	5.91	5.53	4.19	3.21	2	-	-

              

Note that months with values of only one digit do not have enough historical data to give a more precise amount.  Missing data are shown with a  ‘-‘.

For the May-October period, the evaporation from a Free Water Surface can be estimated by multiplying the pan evaporation by 0.75.  For more detailed information on pan coefficients and maps of pan evaporation, please go to NOAA Technical Report NWS 33 Evaporation Atlas for the Continguous 48 United States.

Prepared by:

Pam Knox

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