Northern Alabama - Decatur - Priceville
Severe/Hazardous Weather,
Huntsville
Office, National Weather
Service
Storm Prediction Center, NCEP,
NWS
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Station KEET in Birmingham, AL
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Sounding for Decatur, AL
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Sounding variables, indices, parcel values
Y / N - CAPE ( Convective available potential energy): Greater than 1,500? Greater than 2,500?
Y / N - CINH (Convective inhibition): Greater than 51? Greater than 200?
PW - Precipitable Water (i.e., the amount of moisture in the troposphere)
Y / N - Total Totals Index (TT): Greater than 53? Greater than 56?
Y / N - K Index (KI): Greater than 26? Greater than 40?
Y / N - Lifted Index (LI): Less than -4? Less than -8?
Y / N - Showalter Index (SI): Less than -4? Less than -8?
Y / N - SWEAT Index (Severe Weather Threat Index): Greater than 300? Greater than 400?
LCL - Lifting Condensation Level. This is the level at which a lifted parcel becomes saturated, and is a reasonable estimate of cloud base height when air parcels experience forced ascent.
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PW - Moisture Content:
0.50 inches or less = Very low |
Dew Point Greater than 75° = Very high 65-74° = High 55-64° = Moderate Less than 55° = Low |
Low Level Jet Greater than 70 knots = Extremely high 50-69 = Very high 30-49 = High 20-29 = Moderate Less than 20 = Low |
Additional Variables to Watch: Vertical Wind Shear, Veering, Mid-level Cap, Helicity.
See also SKEW-T for Birmingham, AL.
See generally "Getting to Know the SKEW-T Parameters" by meteorologist Jeff Haby.
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Southeast Sector - Storm Prediction Center Mesoanalysis Sectors
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24 Hour Forecast | 48 Hour Forecast | 3 Day | 4 Day | 5 Day | 6 Day |
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A few of the additional weather pages on this web site:
Daily Weather Charts - Complete
Huntsville Weather Forecast Office, National Weather Service
Short Term Forecast
(The 6-Hour NOWCAST).
Not issued during fair weather. Access only during inclement weather;
carefully check the date and time.
Special Weather Statements
Issued infrequently; carefully check the date and time.
Storm Reports
Storm specific; carefully check the date and time.
Storm Prediction Center: Watches, Mesoscale Discussions, Outlooks
