Northern Alabama - Decatur - Priceville
Daily Weather Charts
Office, National Weather
Storm Prediction Center, NCEP, NWS
Station KEET in Birmingham, AL
Sounding for Decatur, AL
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.
PW - Moisture Content:
0.50 inches or less = Very low
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.
Southeast Sector - Storm Prediction Center Mesoanalysis Sectors
National Weather Hazards
Day One Convective Outlook
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 specific; carefully check the date and time.
Storm Prediction Center: Watches, Mesoscale Discussions, Outlooks