Date: Thu, 23 Aug 2001 10:25:07 -0400 (EDT)
X-Sender: winkelman@glerl.noaa.gov
To: eegle-kites@wings.glerl.noaa.gov
From: Andy Winkelman <andy.winkelman@noaa.gov>
Subject: Stratified periods for L. Michigan
X-Attachments: ../projects/p08/HISTST1.xls
Status: RO

Hello All,
   The attached EXCEL files include the start dates for the stratified and
unstratified periods in the Northern and Southern Basins of Lake Michigan
from 1980 to the present.  Water temperature data collected and archived
from NDBC buoys 45007 (42.67N, 87.02W) and 45002 (45.33N, 86.42W) was used
to find the appropriate dates.  The unstratified period began when the
surface water dropped below 5.0 degrees celsius and the stratified period
began when the water warmed to above 5.0 degrees C.  For any years when the
buoys were pulled before the water had dropped below 5.0 degrees, the date
indicates when the buoy was pulled and the water temp at that time.  Feel
free to email me if you have any questions.
                                Andy