Saturn's icy moon Enceladus hides a global ocean beneath its frozen surface. From fractures near its south pole, material from this ocean is ejected into space as a plume of water vapor and ice partic...

SPC 0100Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0758 PM CDT Thu Oct 08 2026 Valid 090100Z - 091200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE FLORIDA PENINSULA AND IOWA... ...SUMMARY... Localized severe thunderstorms may occur across the west-central part of the Florida Peninsula and across parts of Iowa tonight. ...Florida Peninsula... Water vapor imagery currently shows a plume of mid-level moisture associated with Hurricane Isaias from the central Gulf of America northeastward across much of the Southeast. Thunderstorms associated with Isaias will move inland across the Florida Peninsula this evening into tonight. Over the southern half of Florida, the RAP shows MLCAPE in the 1000 to 1500 J/kg range. The most favorable zone for rotating storms will be along the northern edge of the stronger instability near and to the southeast of Tampa Bay. RAP forecast soundings in the area have veering winds with height in the lowest 3 km with enough low-level shear for an isolated tornado threat. ...Iowa... At mid-levels, west-northwesterly flow is located over the central and northern U.S. A subtle shortwave trough appears to be moving through South Dakota. Lift will be maximized in the mid Missouri Valley ahead of this feature, along the far eastern edge of a central Plains low-level speed max. As low-level flow increases this evening, elevated storms will continue to develop over western and central Iowa. RAP forecast soundings in west-central Iowa show a sharp temperature inversion at low-levels, with steep lapse rates above 900 mb. The resulting MUCAPE is forecast to be in the 1500 to 2000 J/kg range. This combined with about 50 knots of effective shear should be enough for an isolated hail threat. ..Broyles.. 10/09/2026 Read more

Saturn's icy moon Enceladus hides a global ocean beneath its frozen surface. From fractures near its south pole, material from this ocean is ejected into space as a plume of water vapor and ice particles.

**The first significant atmospheric river of autumn has arrived.** The satellite imagery tonight is impressive. For example, consider the water vapor image from the NOAA GOES-West satellite. A magnificent moisture plume from the Central Pacific into our region. Here is another. The forecast of the **transport of water vapor** by the European Center model for tonight at 10 PM is shown below. The atmospheric river is moving huge amounts of water vapor into the Pacific Northwest, with the center of the plume directed to the northern Olympics and southern Vancouver Island. The plume of moisture will be forced to rise by our regional terrain, producing substantial windward precipitation. Below is the prediction of the total precipitation through 5 AM Wednesday (from the European Center forecast). Southern BC and northern WA get hit hard. **The UW, ultra-high-resolution forecast for the same period shows the details (below).** As much as 3-5 inches on the western slopes of the Olympics and central/northern Cascades. Substantial amounts reach the eastern slopes of the Cascades. Nice rain shadow over central Puget Sound. I bet I can get away with biking to the UW tomorrow! If you had refrained from watering your garden... go ahead. Probably time to find your umbrella as well. September will end up with normal precipitation for most of the region.

Following the January 2022 Hunga-Tonga eruption, both aerosols and water vapor increased in the stratosphere The stratospheric water vapor increases the net downward radiative flux up to 0.3 W/m2...

As a common feature with thermal power plants, cooling towers enable major water savings compared to straight through cooling methods. Even so, the big clouds of water vapor above them …read more