Will Spangler
DSS/SCD/NCAR
Oct 93
DAILY SUMMARY DATA
THE FOLLOWING FIELDS ARE AVAILABLE:
Prefixes- (*) for old (AB) format, (.) for new format, starting Jan87.
* . 24 HOUR MAXIMUM TEMPERATURE. MAY BE ESTIMATED FROM
REPORTED SYNOPTIC AIR TEMPERATURES IF SUFFICIENT DATA EXIST.
* . 24 HOUR MINIMUM TEMPERATURE. MAY BE ESTIMATED FROM
REPORTED SYNOPTIC AIR TEMPERATURES IF SUFFICIENT DATA EXIST.
* . TOTAL OF PRECIPITATION REPORTED DURING THE 24 HOUR
PERIOD. THIS AMOUNT MAY INCLUDE PRECIPITATION WHICH
FELL DURING THE PREVIOUS 24 HOUR PERIOD PUT WAS NOT INCLUDED
IN THE PREVIOUS DAYS SUMMARY RECORD.
* TOTAL OF PRECIPITATION REPORTED DURING THE 24 HOUR PERIOD.
* . TOTAL OF PRECIPITATION INCLUDING ESTIMATES FOR ANY
PERIOD FOR WHICH THERE WAS NO REPORTED AMOUNT.
. VAPOR PRESSURE
. POTENTIAL EVAPOTRANSPIRATION
. VAPOR PRESSURE DEFICIT
. 0600Z SEA LEVEL PRESSURE
. 1200Z SEA LEVEL PRESSURE
. 1800Z SEA LEVEL PRESSURE
. 0000Z SEA LEVEL PRESSURE
. MAXIMUM APPARENT TEMPERATURE
. MINIMUM WIND CHILL
. NET RADIATION
* . MAXIMUM TEMPERATURE FLAG.
* . MINIMUM TEMPERATURE FLAG.
. PRECIPITATION QUALITY FLAG
* 24-HOUR PRECIPITATION FLAG
. PRECIPITATION TIME FLAG INDICATING THE ENDING TIME
OF THE 24 HOUR PERIOD THAT THE PRECIPITATION WAS SUMMARIZED.
1-0300Z 2-0600Z 3-0900Z 4-1200Z 5-1500Z 6-1800Z 7-2100Z
0-2400Z. A 9 INDICATES 0600Z ON THE DAY AFTER THE GREENWICH
DATE INDICATED IN FIELD 1.
. NUMBER OF 3 HOUR PERIODS FOR WHICH AT LEAST ONE
OBSERVATION WAS RECEIVED.
. NUMBER OF 3 HOUR PERIODS DURING THE DAY IN WHICH
PAST OR PRESENT WEATHER INDICATED PRECIPITATION. WILL ALWAYS
BE LESS THAN OR EQUAL TO FIELD 15. THE FOLLOWING TABLES OF
PRESENT/PAST WEATHER ARE USED TO DETERMINE IF PRECIPITATION
HAS OCCURRED:
TABLE OF PRESENT WEATHER INDICATING PRECIPITATION OCCURRENCE
AS DEFINED BY CEAS***
DERIVED FROM OFFICE NOTE 124, CODE TABLE 4.
0 - DOES NOT COUNT TOWARD NUMBER OF OBSERVATIONS WITH
PRECIPITATION.
1 - COUNTS TOWARD NUMBER OF OBSERVATIONS WITH PRECIPITATION.
1'S DIGIT OF PRESENT WEATHER CODE
0 1 2 3 4 5 6 7 8 9
----------------------------------------
00 ! 0 0 0 0 0 0 0 0 0 0
10'S 10 ! 0 0 0 1 0 1 1 1 1 1
DIGIT 20 ! 1 1 1 1 1 1 1 1 0 1
OF 30 ! 0 0 0 0 0 0 0 0 0 0
PRESENT 40 ! 0 0 0 0 0 0 0 0 0 0
WEATHER 50 ! 1 1 1 1 1 1 1 1 1 1
CODE 60 ! 1 1 1 1 1 1 1 1 1 1
70 ! 1 1 1 1 1 1 1 1 1 1
80 ! 1 1 1 1 1 1 1 1 1 1
90 ! 1 1 1 1 1 1 1 1 1 1
----------------------------------------
TABLE OF PAST WEATHER INDICATING PRECIPITATION OCCURRENCE
AS DEFINED BY CEAS***
FROM NMC OFFICE NOTE 124, CODE TABLE 5
PAST WEATHER DIGIT
0 1 2 3 4 5 6 7 8 9
---------------------------------------
0 0 0 0 0 1 1 1 1 1
* . NUMBER OF 6 HOUR PERIODS THAT PRECIPITATION WAS ESTIMATED.
* . PRECIPITATION TRACE INDICATOR
* . PRESENT/PAST WEATHER CHARACTER FLAGS.
8 - 1 CHARACTER FLAGS INDICATING GENERAL FORM OF MOST
SIGNIFICANT PRESENT OR PAST WEATHER FOR EACH OF THE 8
SYNOPTIC REPORTING TIMES. THE POSITION OF THE FLAG
FROM LEFT TO RIGHT INDICATES THE TIME OF OBSERVATION, I.E.
POSITION 1 IS FOR THE FIRST 3 HOURS SUMMARIZED AND POSITION
8 IS FOR THE LAST 3 HOUR PERIOD THAT WAS SUMMARIZED FOR THAT
STATION. A '-' INDICATES THAT NO STATION REPORT WAS AVAILABLE
FOR THAT TIME PERIOD. '/' INDICATES NEITHER
PRESENT NOR PAST WEATHER REPORTED. THE OTHER CODES
AVAILABLE ARE IN THE FOLLOWING TABLES OF PRESENT/PAST
WEATHER.
TABLE OF PRESENT WEATHER CHARACTER FLAGS
DERIVED FROM NMC OFFICE NOTE 124, CODE TABLE 4.
1'S DIGIT OF PRESENT WEATHER
0 1 2 3 4 5 6 7 8 9
----------------------------------------
10'S 00 ! 0 0 0 0 K H D D D D
DIGIT 10 ! F F F T 0 R R T Q T
OF 20 ! L R S S Z R S A F T
PRESENT 30 ! D D D D D D B B B B
WEATHER 40 ! F F F F F F F F Z Z
50 ! L L L L L L Z Z R R
60 ! R R R R R R Z Z S S
70 ! S S S S S S S S S S
80 ! R R R S S S S A A A
90 ! A T T A A T A T T A
----------------------------------------
TABLE OF PAST WEATHER CHARACTER FLAGS.
FROM NMC OFFICE NOTE 124, CODE TABLE 5.
PAST WEATHER DIGIT
0 1 2 3 4 5 6 7 8 9
-------------------------------------
0 0 0 B F L R S W T
. THE MAXIMUM RELATIVE HUMIDITY.
. THE MINIMUM RELATIVE HUMIDITY.
. VAPOR PRESSURE QUALITY FLAG.
* TOTAL NUMBER OF SYNOPTIC OBSERVATIONS RECEIVED.
* TOTAL NUMBER OF SYNOPTIC OBSERVATIONS REPORTING THE OCCURRENCE OF
PRESENT AND/OR PAST WEATHER.
* HOURLY SNOW DEPTH
. STARTING IN 1994, TOTAL SKY COVER FOR EACH 3 HOUR TIME PERIOD 03Z-21Z,00Z
. STARTING IN 1994, WIND DIRECTION FOR EACH 3 HOUR TIME PERIOD 03Z-21Z,00Z
. STARTING IN 1994, WIND SPEED FOR EACH 3 HOUR TIME PERIOD 03Z-21Z,00Z
. STARTING IN 1994, TOTAL SNOW DEPTH
*** CEAS - CENTER FOR ENVIRONMENTAL ASSESSMENT SERVICES. IT IS NOW
DEFUNCT. SOME OF IT FUNCTIONS WERE TAKEN OVER BY CAC AND
SOME BY THE JOINT AG WX FACILITY(JAWF). CAC (Climate Analysis
Center) HAS BEEN RENAMED CPC (Climate Prediction Center).