When the forecast is predicting more than 36 hours into the future, the mostly-clear accuracy Mostly-clear forecasts (cloud75%) have been When the forecast is clear, the sky may still be hazy, if the transparency forecast is poor.Īccuracy averaged over North America for a 30 day period: when the forecast is predicting less than 12 hours into the future, This forecast may miss low cloud and afternoon thunderstorms. Lighter shades of blue are increasing cloudiness and white is overcast. The colors are picked from what color the sky is likely to be, with The line, labeled Cloud Cover forecasts total cloud cover. (Local time for Old Tunnel State Park is -5.0 hours from GMT.) A digit 1 on top of a 3 means 13:00 or 1pm. The two numbers at the top of a column is the time.
The colors of the blocks are the colors from CMC's forecast maps for that hour. Summary: In the rows labeled "sky conditions", find a column of blue blocks. Summarizes CMC's forecast images just for Old Tunnel State ParkĪnd the surroundings out to about 10 miles. So, I (Attilla Danko) wrote a script to generate the images like the one above It can be a chore to find the one map that tells you if you can observe tonight. CMC's numerical weather forecasts are unique because they are specifically designed for astronomers.īut they have 1180 forecast maps. The data comes from a forecast model developed by Allan Rahill of theĬanadian Meteorological Centre. It's a prediction of when Old Tunnel State Park, TX, will have good weather for astronomical observing. At a glance, it shows when it will be cloudy or clear for the Limited to 10 registrants.State park near Fredericksburg.
OLD TUNNEL STATE PARK REGISTRATION
Registration is required for this trip and further details for meeting the group will be provided to registrants prior to the date of the trip. Handrails are situated along the steeper sections, and hiking sticks or trekking poles can also be helpful if stability is a concern. However, the other half of the trail has some short, steeper sections which are between 5%-17%. About half of the trail is relatively flat, with a grade of less than 5%. The trail is earthen, with some areas of limestone rock and other areas of smooth dirt. Trail description and accessibility: We will walk slowly for about 0.6 mile on an out-and-back trail. Butterfly expert and avid birder Patty Leslie Pasztor will co-lead this walk and teach us about the butterflies of the area as well as the plants upon which they depend. After the sun rises and most bats have returned, we will bird along a section of the park trail. We’ll watch them plummet down from over a mile high, ripping through the air and into the tunnel at speeds of 60 mph.
This unique trip will begin before dawn as the bats are returning to the tunnel from their nightly feast.
Over 130 bird species have been reported at Old Tunnel SP. Live oak-Ashe juniper and Cedar elm woodlands predominate, and a small perennial creek flowing out of the tunnel creates small pools for birds and other wildlife. The park supports surprising habitat diversity within its steep slopes and mesic canyons. Old Tunnel SP lies in the southeastern edge of the Texas Hill Country. One species in particular, though, the Monarch Butterfly, is the only butterfly species in North America to undertake a round-trip, north-south true migration, and Old Tunnel SP sits right in the heart of this species’ migration route. Likewise, many species of butterflies, like the American Snout Butterfly, disperse and migrate short distances in early fall in search of food, host plants, and mates. Mexican Free-tailed Bats, too, are beginning their southward journey, often waiting for strong northerly winds to help them along on their way. By early October, many different bird species will be migrating through central Texas on their way to warmer locales in Mexico or Central or South America. Fall is the perfect time to immerse yourself in the wonders of long-distance migration.
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