What is an f6 report?
What is an f6 report?
The Weather Service Form F-6 is used by reporting stations to record their unofficial daily climate data for the month. The daily data from the form is then used to calculate sums, means and departures for the month.
How much CAPE is needed for a tornado?
On average, CAPE of 1000 J/Kg is usually sufficient for strong to severe storms. CAPE of 3,000 to 4,000 J/Kg or higher is usually a signal of a very volatile atmosphere that could produce severe storms if other environmental parameters are in place.
What is the maximum wind speed of a F4 tornado?
207-260 mph
The Fujita Scale
| The Fujita Scale of Tornado Intensity | ||
|---|---|---|
| F-Scale Number | Intensity Phrase | Wind Speed |
| F3 | Severe tornado | 158-206 mph |
| F4 | Devastating tornado | 207-260 mph |
| F5 | Incredible tornado | 261-318 mph |
What is a high CAPE value?
High CAPE values usually mean a thunderstorm will build quickly and is an indicator of strong storm updrafts. The probability for severe weather increases as CAPE values grow. A CAPE value of 2,500 to 3,000 would be a red flag to any forecaster that a thunderstorm will likely produce severe weather.
What is Dcape?
• DACAPE is the maximum energy available to a descending. parcel of air. • Used to estimate the potential strength of rain-cooled. downdrafts within thunderstorms. • The higher the value of DCAPE, the stronger the downdraft.
What is Mucape?
MUCAPE (Most Unstable Convective Available Potential Energy) is a measure of instability in the troposphere. This value represents the total amount of potential energy available to the most unstable parcel of air found within the lowest 300-mb of the atmosphere while being lifted to its level of free convection (LFC).
What Mountain has the worst weather?
Standing at 6,288 feet, New Hampshire’s Mount Washington is the highest peak in the northeastern United States. Originally called Agiocochook by native Americans, the mountain boasts some of the planet’s most severe weather.
What does LFC mean in weather?
The Level of Free Convection (LFC) is the level at which a lifted parcel begins a free acceleration upward to the equilibrium level. Recent preliminary research suggests that tornadoes become more likely in supercells when LFC heights are less than 2000 m (6500 feet) above ground level.