Table 10.   Reason codes associated with step "PREVENT", program code 004 (last revised 5/30/2001). 
  

KEY: 
  IN "R.CODE" COLUMN: 
                B - OCCURS IN ALL OPERATIONAL VERSIONS OF PREVENT. 
  
 
R.CODE    MEANING                                            MNEMONICS AFFECTED AND NEW VALUE FOR OBS, Q.M 
=======   =================================================  =============================================

01 B      PRESSURE OBSERVATION ON ANY LEVEL IS MORE THAN     PRC-> PQM=8;TRC-> TQM=8 
          100 MB BELOW MODEL (GUESS) SURFACE PRESSURE. ALL   QRC-> QQM=8;WRC-> WQM=8 
          DATA ON LEVEL REJECTED.

02 B      PRESSURE OBSERVATION ON ANY LEVEL IS ZERO OR       PRC-> PQM=8;TRC-> TQM=8 
          NEGATIVE. ALL DATA ON LEVEL REJECTED.              QRC-> QQM=8;WRC-> WQM=8

02 B      SURFACE PRESSURE OBSERVATION IS ABOVE 450 MB OR    PRC-> PQM=8;TRC-> TQM=8
          BELOW 1100 MB. ALL DATA ON SURFACE LEVEL REJECTED. QRC-> QQM=8;WRC-> WQM=8 

02 B      TEMPERATURE ON ANY LEVEL IS MISSING OR LESS THAN   QRC-> QQM=9  
          -150 DEG. CELSIUS. SPECIFIC HUMIDITY ON LEVEL 
          REJECTED.

02 B      SPECIFIC HUMIDITY OBSERVATION IS ZERO OR NEGATIVE. QRC-> QQM=9 
          SPECIFIC HUMIDITY ON LEVEL REJECTED.

03 B      SURFACE PRESSURE OBSERVATION ERROR VALUEIS         PRC-> PQM=9;TRC-> TQM=9 
          MISSING. ALL DATA ON SURFACE LEVELREJECTED.        QRC-> QQM=9;WRC-> WQM=9

03 B      TEMPERATURE OBSERVATION ERROR VALUE ONANY LEVEL    TRC-> TQM=9;QRC-> QQM=9 
          IS MISSING. TEMPERATURE AND SPECIFIC HUMIDITY 
          ON LEVEL REJECTED.

03 B      SPECIFIC HUMIDITY OBSERVATION ERROR VALUE ON       QRC-> QQM=9
          ANY LEVEL IS MISSING. SPECIFIC HUMIDITY ON LEVEL 
          REJECTED.

03 B      WIND OBSERVATION ERROR VALUE ON ANY LEVEL IS       WRC-> WQM=9  
          MISSING. U- AND V-COMP WIND ON LEVEL REJECTED.

03 B      TOTAL COLUMN PRECIPITABLE WATER OBSERVATION        PWR-> PWQ=9 
          ERROR IS MISSING. TOTAL COLUMN PRECIPITABLE 
          WATER REJECTED.

04 B      SURFACE PRESSURE IS MORE THAN 100 MB ABOVE OR      PRC-> PQM=9;TRC-> TQM=9  
          BELOW MODEL (GUESS) SURFACEPRESSURE. ALL DATA      QRC-> QQM=9;WRC-> WQM=9 
          ON SURFACE LEVEL REJECTED.

05 B      PRESSURE ON ANY LEVEL IS ABOVE 300 MB.             QRC-> QQM=9 
          SPECIFIC HUMIDITY ON LEVEL REJECTED.