Marine Weather and Tides
10/6/2018 Colors of tide XTide graphs changed to emphasize that they were upgraded. See next note. Comments welcome.
10/4/2018 I have fixed XTide and updated the harmonic files. There were some name changes so you might have to click EDIT to find the new station name.
|Sunrise 5:30AM||Sunset 8:34PM||Monday May 20, 2019 4:16 PM CDT (21:16 UTC)||Moonrise 9:36PM||Moonset 6:01AM||Illumination 97%|
7 Day Forecast for Marine Location Near Altoona, WIHourly EDIT Help
Area Discussion for - Twin Cities, MN  (on/off)  Help NOTE: mouseover dotted underlined text for definition
|Fxus63 kmpx 202020|
area forecast discussion
national weather service twin cities chanhassen mn
320 pm cdt Mon may 20 2019
Short term (this evening through Tuesday night)
issued at 318 pm cdt Mon may 20 2019
main weather concern during the short term is tracking wind and
precip trends with the storm system coming up out of the southern
plains tonight. The ECMWF gfs canadian are all similar with bringing
a roughly 995 mb low up through the eastern dakotas Tuesday night.
Forcing with this wave is impressive, with strong PV advection and
lift within the left exit region of a 120 kt jet to our south. To
the north of the low, we'll see some impressive east winds develop,
with 60 kt easterly h85 jet working across southern mn, so there
will be potential for some stronger winds. We went ahead with a
wind advisory for our typical windy areas from west central through
south central mn, where gusts to 50 mph look possible. Depending on
how efficiently we mix, we could need to add another row or two of
counties on to the east side of the advisory as well.
The bigger issue with these east winds is that they will be
advecting in quite a bit of dry air from the east, so biggest change
made in this forecast was to slow down the northward progression of
pops on Tuesday, though it could end up even slower if things end up
timing more in line with the hrrr. There's virtually no convective
instability noted with this band of forcing coming up so have just
showers mentioned. This lack of upright convection is what should
help keep precip amounts from getting out of hand, with a widespread
0.5" to 1" of rain expected, with the highest amounts expected over
Going into Tuesday night, the dry slot looks to move overhead, which
should cut off precip for much of the area from south to north
during the night. Precip chances through the night look best out in
western mn, closer to the track of the upper low.
Long term (Wednesday through Monday)
issued at 318 pm cdt Mon may 20 2019
no big changes are expected in the long term to the large scale
pattern through memorial day, with the southeast being dominated by
a ridge and a trough to our west. This pattern will continue
kicking out strong storm systems across the plains, with the next
one after today's coming Thursday Friday, with the next one after
that due in for memorial day. There are still plenty of fine scale
details with each of these systems, so stuck with the blended
forecast through the period.
Wednesday, with the upper low moving across the northern plains,
we'll have cool temps aloft, which should promote the development of
diurnally driven showers and maybe a thunderstorm or two. Based on
placement of the h5 thermal trough, the best chance for showers|
Wednesday afternoon will angle from the black hills northeast toward
Thursday, we dry out, but the next storm system and potential severe
weather event will be unfolding across the central plains. This
storm system comes up here Thursday night into Friday morning.
Again, this looks to be a primarily WAA driven precip event, with
the main difference from what we will see Tuesday night is that
Thursday night Friday we'll have some elevated instability and the
possibility for thunderstorms this time around.
For the holiday weekend, we look to clear out Friday afternoon and
look to have very pleasant weather Saturday and Sunday, Monday, not
so much. This will be our next large weather system to impact the
area. There's still lots of uncertainty with how far north the warm
sector gets, but at the very least, we look to end the holiday
weekend on a stormy note and if the warm sector were to get up here,
it would come with a side of severe weather as well.
Aviation (for the 18z tafs through 18z Tuesday afternoon)
issued at 1259 pm cdt Mon may 20 2019
easterly winds will be on the increase through the period as a
powerful storm system comes out of the southern plains. These
easterly winds will also be transporting dry low level air in,
which will keep our clouds to the mid levels this period, with
rain staying away as well.
Kmsp... With the high overhead, our wind directions today will be
driven purely by mixing, so they will be erratic, though
averaging out of the northeast in general.
Outlook for kmsp
wed... MVFR thru mrng.VFR with chc MVFR -shra in aftn. Wind se
bcmg SW at 10-15g25 kts.
Thu... MVFR cigs. Wind NW 5-10 kts.
Fri... Chc MVFR. Winds SW 15g30 kts.
Mpx watches warnings advisories
Mn... Wind advisory from 2 pm Tuesday to 1 am cdt Wednesday for mnz041-
Wind advisory from 2 pm to 10 pm cdt Tuesday for mnz058-065>067-
Short term... Mpg
long term... Mpg
Weather Reporting StationsEDIT (on/off)  Help NOTE: Click on distance to see the station location on a map
Airport ReportsEDIT (on/off)  Help Click EDIT to display multiple airports
|Chippewa Valley Regional Airport, WI||7 mi||21 min||NNE 11||10.00 mi||Fair||61°F||35°F||38%||1020 hPa|
|Menomonie Municipal Airport-Score Field, WI||22 mi||22 min||N 6||10.00 mi||Fair||57°F||31°F||38%||1020 hPa|
Wind History from EAU (wind in knots)
|1 day ago||NE|
|2 days ago||E|
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GOES Local Image of EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop
Other links: Northern Pacific Contential US Full GOES-East
Wind Forecast for Twin Cities, MN (17,4,5,8)(on/off)  Help
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