National Weather Service United States Department of Commerce

The April 3rd and 4th 1974 Tornado Outbreak in Alabama - Jackson Soundings

LFC =  651mb                  JAN / 04/03/74 /  12Z                     V(2/98)
                          OBSERVED SOUNDING PARAMETERS

  +--------------------------CONVECTIVE POTENTIAL----------------------------+
        B+............. -999 J/Kg                  K-Index............  21     
        B-............. -999 J/Kg                  Precip Water.......  1.02 in
        LI.............   -8                       Showalter Index.... -5      
        Cap Strength...    6.3 C                  Total Totals.......  56    
        LPL..(PMAX)....     0 ft/ 989 mb           Sweat Index........  527    
                                                                           
        Tropopause......... -999 ft.               700-500mb LR...  8.7 C/km  
        Equilibrium Level..   -999 ft.             TEI( 940- 840). 23.1 C    
        Max Parcel Level...   -999 ft.             BRN............ -999        
        Wet-Bulb Zero......   9800 ft.             BRN Shear......  100 (M/S)
  +---------------------------WIND / STORM TYPE------------------------------+
        Cloud Lyr Mn Wind.. 246/ 56 kts     0-2km SR MoFlux...... 240 g/kg/hr  
        Mean Wind (0-6Km).. 221/ 38 kts     Pos Shear   (0-2Km).. 10 (10-3 S-1)
        Storm Motion....... 246/ 42 kts     SR Dir Shr  (0-3km)..  51         
                                                                            
        Energy/Helicity Index...-99.00      SR Helicity (0-3Km).. 398 (M/S)
  +--------------------------------------------------------------------------+
        (F1)-Print               (F3)-Skew T                (F5)-Next Screen  
        (F2)-Main Menu           (F4)-Hodograph             (F7)-Help        
  +--------------------------------------------------------------------------+

 

LFC =  866mb                  JAN / 04/04/74 / 00Z                      V(2/98)
                          OBSERVED SOUNDING PARAMETERS

  +--------------------------CONVECTIVE POTENTIAL----------------------------+
  �   B+............. -999 J/Kg                  K-Index............  39     �
  �   B-............. -999 J/Kg                  Precip Water.......  1.61 in�
  �   LI.............   -9                       Showalter Index.... -8      �
  �   Cap Strength...    0.8 �C                  Total Totals.......  58     �
  �   LPL..(PMAX)....  1151 ft/ 950 mb           Sweat Index........  578    �
  �                                                                          �
  �   Tropopause......... -999 ft.               700-500mb LR...  6.7 �C/km  �
  �   Equilibrium Level..   -999 ft.             TEI( 960- 640). 28.8 �C     �
  �   Max Parcel Level...   -999 ft.             BRN............ -999        �
  �   Wet-Bulb Zero......  10500 ft.             BRN Shear......  112 (M/S)� �
  +---------------------------WIND / STORM TYPE------------------------------�
  �   Cloud Lyr Mn Wind..-999/-999 kts    0-2km SR MoFlux...... 302 g/kg/hr  �
  �   Mean Wind (0-6Km).. 222/ 48 kts     Pos Shear   (0-2Km).. 4 (10-3 S-1) �
  �   Storm Motion....... 252/ 36 kts     SR Dir Shr  (0-3km)..  93�         �
  �                                                                          �
  �   Energy/Helicity Index...-99.00      SR Helicity (0-3Km).. 251 (M/S)�   �
  �--------------------------------------------------------------------------�
  �   (F1)-Print               (F3)-Skew T                (F5)-Next Screen   �
  �   (F2)-Main Menu           (F4)-Hodograph             (F7)-Help          �
  +--------------------------------------------------------------------------+