SWEAT

{
  "id": "MLC-T-MET-002727",
  "term": "SWEAT",
  "field": "Meteorology and atmospheric science",
  "definition": "Severe Weather ThrEAT index; a stability index developed by the Air Force which incorporates instability, wind shear, and wind speeds as follows:\n\nSWEAT=(12 Td 850 ) + (20 [TT-49]) +( 2 f 850) + f 500 + (125 [s+0.2]) where\n\n• Td 850 is the dew point temperature at 850 mb,\n\n• TT is the total-totals index,\n\n• f 850 is the 850-mb wind speed (in knots),\n\n• f 500 is the 500-mb wind speed (in knots), and\n\n• s is the sine of the angle between the wind directions at 500 mb and 850 mb (thus representing the directional shear in this layer).\n\nSWEAT values of about 250-300 or more indicate a greater potential for severe weather, but as with all stability indices, there are no magic numbers.\n\nThe SWEAT index has the advantage (and disadvantage) of using only mandatory-level data (i.e., 500 mb and 850 mb), but has fallen into relative disuse with the advent of more detailed upper air sounding analysis programs.",
  "references": [
    "NWS Glossary"
  ],
  "url": "https://mlchart.com/terminology/meteorology/sweat/"
}