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Severe thunderstorm warning (SVR) – A severe thunderstorm is indicated by Doppler weather radar or sighted by Skywarn spotters or other persons, such as local law enforcement. A severe thunderstorm contains large damaging hail of 1 inch (2.5 cm) in diameter or larger, and/or damaging winds of 58 mph (93 km/h) or greater.
The Storm Prediction Center issues convective outlooks (AC), consisting of categorical and probabilistic forecasts describing the general threat of severe convective storms over the contiguous United States for the next six to 192 hours (Day 1 through Day 8). These outlooks are labeled and issued by day, and are issued up to five times per day.
Meteorological synopsis High risk convective outlook issued by the Storm Prediction center at 13:00 UTC on May 6 May 6. Starting April 30, the Storm Prediction Center noted that certain models, including the ECMWF, forecasted a multi-day period of high instability and supportive wind shear across the Southern and Central Plains, and by May 1, a 15% risk was added across Nebraska, Kansas ...
The hallmark symptom of heat stroke is a core body temperature above 104 F. But fainting may be the first sign. Other symptoms may include: Throbbing headache. Dizziness and light-headedness. Lack ...
Stroke symptoms may seem to come on suddenly, but there may be warning signs in some situations. A severe headache, or any unusual type of headache, is one potential warning sign of a stroke ...
Perhaps the most common set of side effects for drugs that work inside your body involves the gastrointestinal system. Nearly any drug can cause nausea or an upset stomach, though it may only ...
A high risk severe weather event is the greatest threat level issued by the Storm Prediction Center (SPC) for convective weather events in the United States. On the scale from one to five, a high risk is a level five; thus, high risks are issued only when forecasters at the SPC are confident of a major severe weather outbreak.
Watery, runny eyes. Runny nose. Sneezing. Nasal congestion. These symptoms can make your child feel bad, but it's not life-threatening. But sometimes a child can have what's known as anaphylaxis ...