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Daily Pollen Report

This report will be updated by 3:30 pm each business day.

Thursday, March 11, 2010
	40	0	0
	Trees Moderate	Grasses Absent	Weeds Absent
Pollen Rating: Moderate
Predominant Type: Trees

Measured Pollen Data
	Pollen Rating	Rating Scale (PRS)	Density (grains/m³)
Trees	Moderate	40	57
Grasses	Absent	0	0
Weeds	Absent	0	0

Discussion:

Today's pollen rating is 40 (MODERATE), all TREES: 55% pine, 18% cedar, 16% birch, 6% maple and 5% elm. Rain showers are forecast for today into Saturday evening. Thunderstorms could develop Friday or Saturday. Wet conditions should keep tree pollen LOW tomorrow and MODERATE on Saturday. As conditions dry out, tree pollen will increase to HIGH on Sunday. Weed and grass pollen are typically ABSENT at this time of year. (Russ)

Pollen Forecast (Pollen Rating Scale - PRS)
	Friday 3/12/2010	Saturday 3/13/2010	Sunday 3/14/2010	Monday 3/15/2010
Trees	22	28	51	0
Grasses	0	0	0	0
Weeds	0	0	0	0

Pollen Rating Scale (PRS) Guide
When PRS Values are equal to:
0 Absent Allergy sufferers with sensitivity to this group of pollens should not experience symptoms.
1-25 Low Only individuals extremely sensitive to aeroallergens of this type will experience symptoms.
26-50 Moderate Many individuals sensitive to aeroallergens in this group will experience symptoms.
51-75 High Most individuals with any sensitivity to this group of aeroallergens will experience symptoms.
≥76 Very High Almost all individuals with any sensitivity to these aeroallergens will experience symptoms. Extremely sensitive people could have severe symptoms.

PRS related to Pollen Density (grains per cubic meter)
Rating	PRS	Trees Density	Grasses Density	Weeds Density
Absent	0	0	0	0
Low	1-25	1-14	1-4	1-9
Moderate	26-50	15-89	5-19	10-49
High	51-75	90-1499	20-199	50-499
Very High	>=76	>=1500	>=200	>=500

These pollen density ranges are based upon the NAB Scale ranges suggested by the National Allergy Bureau (NAB) of the American Academy of Allergy, Asthma & Immunology (AAAAI).

For more information contact:
Monitoring and Mobile Sources Division, Pollen Monitoring Program
by telephone: (336) 703-2440
or email: akojelg@forsyth.cc

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Daily Pollen Report