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Friday, March 19, 2010
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Environmental Affairs

Daily Pollen Report

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

Friday, March 19, 2010
    5353   00   00  
    Trees
High		   Grasses
Absent		   Weeds
Absent		  
  Pollen Rating: High
  Predominant Type: Trees
Measured Pollen Data
Pollen
Rating		 Rating Scale
(PRS)		 Density
(grains/m3)
Trees High 53 226
Grasses Absent 0 0
Weeds Absent 0 0

Discussion:

Today's pollen rating is 53 (HIGH), all TREES: 67% cedar, 13% elm, 12% maple, 3% cottonwood, 2% alder, 2% birch and 1% other trees. Warm dry weather and light winds are expected through midday on Sunday. There is a slight chance of rain on Sunday afternoon increasing to likely Sunday night and early Monday. Tree pollen should remain HIGH over the weekend before dropping to MODERATE on Monday in response to wet conditions. Grass and Weed pollen are typically ABSENT at this time of year. (Russ)
Pollen Forecast (Pollen Rating Scale - PRS)
Saturday
3/20/2010		 Sunday
3/21/2010		 Monday
3/22/2010		 Tuesday
3/23/2010
Trees 60 58 26
Grasses 0 0 0
Weeds 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