Warm and Muggy October 17, 2016

A humid air mass more at home during the summer months moved over the southern half of Minnesota on October 17, 2016. In the morning hours of the 17th, air temperatures in the Twin Cities were in the mid 60's. The normal high temperature for October 17 is 58 degrees and the normal low is 39. The Twin Cities saw a dew point temperature of 64 degrees at 3am on the 17th. The dew point temperature for October in the Twin Cities has been as high as 66 degrees on October 29, 2004 at 11am. The record high dew point temperature in the month of October for the Twin Cities is 70 degrees, set on October 14, 1962.

Dew point temperatures were higher to the southeast on October 17, 2016. Rochester saw a record late maximum dew point temperature as well as La Crosse. Rochester saw 68 degrees on October 17, 2016 and La Crosse saw a 70 degree dew point temperature.

Strong thunderstorms developed in this warm air mass ahead of a cold front during the afternoon of the 17th. Some hail was reported with these storms over Brooklyn Park and some penny-sized hail was reported over Eagan and Cottage Grove.

Below are event reports from the National Weather Service.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
624 PM CDT MON OCT 17 2016


..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..


0530 PM     HAIL             EAGAN                   44.82N 93.16W
10/17/2016  E0.75 INCH       DAKOTA             MN   PUBLIC           



PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
624 PM CDT MON OCT 17 2016


..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..


0542 PM     HAIL             COTTAGE GROVE           44.82N 92.93W
10/17/2016  E0.75 INCH       WASHINGTON         MN   PUBLIC           

RECORD EVENT REPORT 
NATIONAL WEATHER SERVICE LA CROSSE WI 
236 AM CDT TUE OCT 18 2016


...TIED THE HIGHEST DEW POINT EVER IN AN OCTOBER IN LA CROSSE WI...
...HIGHEST DEW POINT SO LATE IN THE YEAR AT LA CROSSE WI...


THE DEW POINT CLIMBED TO 70 DEGREES AROUND 4 PM MONDAY AT LA CROSSE
REGIONAL AIRPORT.  THIS TIED THE HIGHEST DEW POINT EVER RECORDED
DURING AN OCTOBER IN LA CROSSE WI.  INCLUDING YESTERDAY THERE HAVE
ONLY BEEN 7 OCTOBER DAYS IN WHICH THE DEW POINT HAS REACHED 70F. THE
LAST TIME IT OCCURRED WAS OCTOBER 8 2007.  THERE HAS ONLY BEEN 4
OCTOBERS SINCE 1934 THAT THERE HAS BEEN AT LEAST ONE 70F DEW POINT.


THIS WAS THE HIGHEST DEW POINT SO LATE IN THE YEAR.  PRIOR TO
YESTERDAY...THE LATEST 70F OR HIGHER DEW POINT IN A YEAR WAS OCTOBER
15TH BACK IN 1962 (70F).  DEW POINT RECORDS FOR LA CROSSE WI DATE
BACK TO 1934.


BELOW ARE HIGHEST OCTOBER CALENDAR DAY DEW POINTS.


    HIGHEST DEW POINTS BY
 OCTOBER DAY IN LA CROSSE WI 


         DEW
  RANK  POINT         DATE
  ----  -----         ----
    1    70F      OCTOBER 17 2016
         70F      OCTOBER 8 2007
         70F      OCTOBER 7 2007 
         70F      OCTOBER 6 2007
         70F      OCTOBER 4 2005
         70F      OCTOBER 3 2005
         70F      OCTOBER 15 1962
    8    69F      OCTOBER 1 1971
         69F      OCTOBER 11 1962
   10    68F      OCTOBER 10 1973
         68F      OCTOBER 9 1973
         68F      OCTOBER 8 1973
         68F      OCTOBER 14 1962
         68F      OCTOBER 11 1962
         68F      OCTOBER 1 1951
         68F      OCTOBER 8 1949
RECORD EVENT REPORT 
NATIONAL WEATHER SERVICE LA CROSSE WI
1051 PM CDT MON OCT 17 2016


...HIGHEST DEW POINT SO LATE IN THE YEAR AT ROCHESTER MN...


WITH A DEW POINT OF 68F THIS AFTERNOON (BETWEEN 2 PM AND 5 PM) AT
ROCHESTER INTERNATIONAL AIRPORT...THIS WAS THE HIGHEST DEW POINT
EVER SO LATE IN THE YEAR AT ROCHESTER MN.  PRIOR TO TODAY...THE
LATEST 68F OR HIGHER DEW POINT IN A YEAR WAS OCTOBER 13TH BACK IN
1962.  DEW POINT RECORDS FOR ROCHESTER MN DATE BACK TO 1948.


THIS WAS THE 4TH HIGHEST OCTOBER DEW POINT ON A CALENDAR DAY.  THE
ONLY DAYS WHICH HAD A HIGHER DEW POINT WAS OCTOBER 7 2007
(72F)...OCTOBER 4, 2005 (70F)...AND OCTOBER 3 2005 (70F).  BELOW ARE
HIGHEST OCTOBER CALENDAR DAY DEW POINTS.


    HIGHEST DEW POINTS BY
 OCTOBER DAY IN ROCHESTER MN 


         DEW
  RANK  POINT         DATE
  ----  -----         ----
    1    72F      OCTOBER 7 2007
    2    70F      OCTOBER 4 2005
         70F      OCTOBER 3 2005
    4    68F      OCTOBER 17 2016
         68F      OCTOBER 8 2007
         68F      OCTOBER 2 2005
         68F      OCTOBER 7 1997
         68F      OCTOBER 13 1962
         68F      OCTOBER 10 1962
         68F      OCTOBER 8 1949