Northern Alabama - Decatur - Priceville

 

Daily Weather Charts

Severe/Hazardous Weather, Huntsville Office, National Weather Service
Storm Prediction Center, NCEP, NWS

 

Current Conditions Activity Chart
Lower Mississippi Valley Sector Radar

National Infrared Satellite Image

National Water Vapor Satellite Image

 

SE US Satellite Image

Gulf Coast IR image from GOES

Gulf Coast

Gulf of Mexico IR Image from GOES

Gulf of Mexico

Florida IR image from GOES

Florida

East Coast IR image from GOES

East Coast

 

250 mb Upper Air Map

 

Huntsville, AL, Skew-T Sounding Chart

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
0.50 to 1.25 inches = Low
1.25 to 1.75 inches = Moderate
1.75 to 2.00 inches = High
2.00 inches or above = Very high

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.

 

Mesoscale Analysis Page Mesoscale Discussion

 

Southeast Sector - Storm Prediction Center Mesoanalysis Sectors


 

 

National Weather Hazards

National Weather Hazards

 

Thunderstorm Outlook Atlantic Tropical Cyclone Activity

 

Thunderstorm Outlook - 16Z-20Z

16Z-20Z

Thunderstorm Outlook - 20Z-00Z

 20Z-0Z

Thunderstorm Outlook - 00Z-04Z

0Z-4Z

 

National Forecast Map Quantitative Precipitation Forecast

24 Hour Forecast  | 48 Hour Forecast | 3 Day | 4 Day | 5 Day | 6 Day

Day 2 Precipitation Forecast | Day 3 Precipitation Forecast

 

Graphical Forecast for North Alabama Graphical Forecast for North Alabama

 


 

 

Hazardous Weather Outlook


 

Area Forecast Discussion


 

Day One Convective Outlook


 

 

A few of the additional weather pages on this web site:

Huntsville Weather Forecast Office, National Weather Service

Storm Prediction Center: Watches, Mesoscale Discussions, Outlooks

 

Amateur Radio Fact of the Day

 

 

SKYWARN Storm Spotter

American Radio Relay League

W4DDA

Amateur Radio Emergency Service