Unsettled Weather Continuing over the Western and Eastern U.S. into Mid Week

Two storm systems, one over the Desert Southwest, and one over the Ohio Valley, will continue to bring unsettled weather and cooler temperatures into the middle of the week. Moderate to heavy rainfall, along with the potential for flash flooding, is forecast from the Ohio Valley to the East Coast. Moderate to locally heavy rainfall is expected over the Northern Rockies, Great Basin and Southwest. Read More >

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How to Read The F6 Table

Preliminary Local Climatological Data (F6)
(updated daily around 2am)

See below for an example of the table data

Monthly Summary Data Included
High, Low, and Average Temperatures and Departure from Normal
Heating and Cooling Degree Days
24 hour Rainfall and Snowfall Amounts
Average 24 hour Wind Speed
Fastest and Peak Wind Speed and Direction
Logs of Specific Weather Occurances, such as Hail, Sleet, Fog, Thunder, Glaze, Dust, Smoke, Blowing Snow, and Tornado

Example monthly F6...

PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

                                          STATION:   TULSA OKLAHOMA
                                          MONTH:     MAY
                                          YEAR:      2004
                                          LATITUDE:   36 12 N                   
                                          LONGITUDE:  95 54 W                   

  TEMPERATURE IN F:       :PCPN:    SNOW:  WIND      :SUNSHINE: SKY     :PK WND 
================================================================================
1   2   3   4   5  6A  6B    7    8   9   10  11  12  13   14  15   16   17  18
                                          AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD  WTR  SNW DPTH SPD SPD DIR MIN PSBL S-S WX    SPD DR
================================================================================

 1  62  48  55 -10  10   0 0.09  0.0    0 11.6 18  20   M    M   8 1      29  20
 2  72  42  57  -8   8   0 0.00  0.0    0  8.1 24 350   M    M   2        30 350
 3  67  39  53 -13  12   0 0.00  0.0    0  6.9 14 180   M    M   2         M  M 

Here is a brief listing of what each of the columns holds:

Column 1 - Day of the Month
Column 2 - Maximum Temperature for the day (Midnight to Midnight CST)
Column 3 - Minimum Temperature for the day (Midnight to Midnight CST)
Column 4 - Average Temperature (MAX+MIN/2)
Column 5 - Daily Departure from Normal Temperature  
Column 6A - Heating Degree Days (COLUMN 4 - 65 degrees) (zero if col 4 > 64)
Column 6B - Cooling Degree Days (65 degrees - COLUMN 4) (zero if col 4 < 66)
Column 7 - Precipitation (rain or melted snow/sleet/ice) in hundreths of inches
Column 8 - Daily Snowfall (in tenths of inches).
Column 9 - Depth of the Snow on the ground (everything).
Column 10- Average Wind Speed for the Day
Column 11 - Maximum 2-min-average wind speed during the Day
Column 12 - Average Wind Direction for the Day (360 degree compass)
Column 13 - Minutes of Sunshine (n/a)
Column 14 - Percent of possible sunshine (n/a)
Column 15 - Sky cover Average Sunrise to Sunset (in tenths of sky covered by clouds)
Column 16 - Any Weather (Numeric Codes found on the form)
Column 17 - Peak Wind Speed
Column 18 - Direction that peak wind came from (360 degree compass)

M - Missing data

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Unsettled Weather Continuing over the Western and Eastern U.S. into Mid Week

f6

How to Read The F6 Table