Thursday, April27, 2017 L-36.com


Marine Weather and Tides
Rillito, AZ

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 5:39AMSunset 7:05PM Thursday April 27, 2017 12:15 AM MST (07:15 UTC) Moonrise 6:53AMMoonset 8:40PM Illumination 2% Phase: Waxing Crescent; Moon at 1 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
    EDIT      (on/off)   Help
7 Day Forecast for Marine Location Near Rillito, AZ
   Hourly   EDIT   Help
location: 32.34, -111.15     debug


Area Discussion for - Tucson, AZ
      (on/off)   Help   NOTE: mouseover dotted underlined text for definition
Fxus65 ktwc 270428
afdtwc
area forecast discussion
national weather service tucson az
925 pm mst Wed apr 26 2017

Synopsis Another system north of our area will bring increasing
winds Thursday afternoon followed by a return of strong and gusty
winds Friday into Saturday. A few showers or thunderstorms are
possible northeast of tucson. Cooler on Saturday followed by dry
conditions with a warming trend next week. Another round of strong
winds are possible next Tuesday or Wednesday.

Discussion Well, april is typically the windiest month on average
across the southwest and this week is living up to that. Today was
relatively quiet with fairly typical winds this afternoon for this
time of year but it is the lull between systems.

We are current under a longwave NW flow pattern with a with
shortwave currently over northern california/southern oregon headed
to the se. This feature will slide by just to the NE of the area
and tighten up the midlevel gradient which will be enough to
increase the afternoon winds a bit above what we had Wednesday
afternoon. Just enough to case some fire weather concerns that are
highlighted below.

Then a stronger system, currently in the gulf of alaska will be
headed our way for Friday. This system has been handled fairly
consistently by the models and will deepen as it drops southeast and
will settle over the 4-corners area Friday evening as a cutoff low.

This is expected to ramp up the winds Friday to speeds similar to
what we saw on Tuesday which brings up the potential of meeting wind
advisory criteria and generating areas of blowing dust. There is a
bit of moisture with this system so we have a chance of a few
showers and/or thunderstorms northeast of the safford area.

Once it cuts off it will be slow to move east so eastern areas will
likely see windy conditions Saturday along with cooler and drier air
moving in on the back side of the storm. It will be cooler than we
have experienced in a bit with highs in the mid 60s higher eastern
valleys to the mid 70s lower deserts. Then Saturday night will be
the coolest we've seen in about 3 weeks, with 30s in valleys east
and south of tucson, and 40s from tucson westward. A few spots will
probably freeze Sunday morning in colder cochise county valley
locations.

From Sunday onward the upper trough will gradually shift to the east
allowing the area to come under greater influence of the west coast
ridge to our west. This will allow temperatures to rise each day
eventually to above normal levels again by Tuesday.

Aviation Valid through 28/00z.

Skc to sct clouds above 20k ft agl thru fcst pd. Sfc wind light and
variable at less than 10 kts then sfc wind increasing again Thursday
afternoon to 15-20 kts with gusts to 30 kts. The strongest speeds
will be E of ktus. Aviation discussion not updated for taf
amendments.

Fire weather Interesting few days coming up, at least through
Saturday. Due to the recent fire behavior noted with the very dry
fuels we have leaned toward the side of caution with rfws. For
Thursday, winds will pick up in the afternoon and are expected reach
red flag criteria across much of zone 152 and some parts of SE zone
151 including the higher terrain of whetstone mtns near the sawmill
fire. Feedback from the fire indicates that the empire raws wind
speeds are lighter than the wind in the open (its slightly
sheltered), so based on that and coordinating with onsite imet will
include the fire area in the red flag warning for Thursday for a
marginal event.

Then the attention turns to Friday where winds will be stronger and
likely very similar to what we saw Tuesday. Rh levels will be
elevated again like Tuesday and generally a bit above criteria, but
based on how the very dry fuels reacted to the wind, and
coordination with imet, opted to issue a fire weather watch for much
of zones 151 and 152. Actually rh levels will be lower from tucson
westward which will meet criteria based on the current forecast so
also have the watch in effect there.

Winds will remain rather elevated again Saturday eastern areas
coupled with lower humidity levels on the back side of the passing
system. As a result we stand a good chance of seeing critical fire
weather conditions again across much of zone 152 and SE 151, but
will let that go for now and focus on the near term.

Beyond that the wind generally settles down some but the air mass
will remain very dry with single digit min rhs each afternoon into
next week with another round of gusty winds possible Tuesday.

Twc watches/warnings/advisories
Red flag warning from noon to 7 pm mst Thursday for azz151-152.

Fire weather watch from Friday morning through Friday evening
for azz150>152.

Cerniglia
visit us on facebook... Twitter... Youtube... And at weather.Gov/tucson


Weather Reporting Stations
   EDIT       (on/off)   Help   NOTE: Click on distance to see the station location on a map

Airport Reports
    EDIT      (on/off)   Help   Click EDIT to display multiple airports
AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tucson Ryan Field Airport, AZ14 mi4.5 hrsSW 910.00 miFair79°F24°F13%1008.8 hPa
Davis-Monthan Air Force Base, AZ18 mi78 minW 410.00 miFair73°F32°F22%1005.9 hPa
Tucson, Tucson International Airport, AZ19 mi23 minSE 810.00 miFair71°F27°F19%1005.5 hPa

Wind History from DMA (wind in knots)
1
AM
2
AM
3
AM
4
AM
5
AM
6
AM
7
AM
8
AM
9
AM
10
AM
11
AM
12
PM
1
PM
2
PM
3
PM
4
PM
5
PM
6
PM
7
PM
8
PM
9
PM
10
PM
11
PM
12
AM
Last 24hrW6SW4S5S5SW5SE5CalmCalmW4N6NW12
G19
NW9
G19
N11
G18
NW11
G18
NW12
G17
N11
G15
W5NW9W4W5W5W5W4SE8
1 day agoSW14
G19
S13SW13
G16
SW11W11
G19
SW9SW9SW12
G22
SW10
G17
W12
G19
W14
G20
W13
G21
W15
G25
W14
G27
W15
G28
W16
G23
W17
G24
W15
G22
NW13
G19
NW8W10W10W5W6
2 days agoS8SE4E5S8SE10SE10E11S7S9SW10SW14
G20
SW15
G23
--W13
G27
W12
G21
SW14
G20
W12
G18
W13
G20
W8SW5SW6SW12S9S8

Tide / Current Tables for
   EDIT   RT Ports Option   Weekend mode (on/off)   (on/off)   Help
Tide / Current Tables for
   EDIT      (on/off)   Help
Weather Map and Satellite Images
       (on/off)   Help
Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Tucson, AZ (3,6,7,8)
      (on/off)   Help

Ground Weather Radar Station Tucson, AZ
   (on/off)   Help
weather_mapweather_map weather_map

Ad by Google

Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.