Monthly Climatological Summary
Norman 3SE, Cleveland Co., OK (Lat 35^10'57"N, Lon 97^25'27"W, elev 1130)
April 2004
------------------------------------------------------------------
     Temperature  Precipitation  Snow      AM         PM
      Max   Min    Water Snow    Depth     Wx         Wx      
------------------------------------------------------------------
01   74.1  40.3     .00   0.0      0       SKC        SKC
02   78.3  47.7     .00   0.0      0       SCT        BKN
03   70.3  47.7     .00   0.0      0       BKN        BKN
04   68.5  45.3     .00   0.0      0       BKN        BKN
05   75.0  51.6       T   0.0      0       BKN        BKN
06   73.2  52.3     .00   0.0      0       BKN        BKN
07   65.8  52.5     .25   0.0      0      -RA         RA FG
08   73.2  50.0     .00   0.0      0       FG         SCT
09   78.6  51.6     .04   0.0      0      -RA         BKN
10   54.1  43.9     .84     T*     0      +TSRA GR   -DZ
11   57.2  37.6     .00   0.0      0       BKN        BKN
12   61.0  43.9     .00   0.0      0       BKN        BKN
13   61.9  36.3     .00   0.0      0       SCT        SCT
14   73.0  34.9     .00   0.0      0       SKC        FEW
15   79.2  52.2     .00   0.0      0       SKC        SCT
16   84.2  59.7     .00   0.0      0       SCT        SKC
17   82.9  64.6     .00   0.0      0       BKN        BKN
18   75.9  64.2     .00   0.0      0       OVC        OVC
19   75.2  63.0       T   0.0      0       BKN       -TSRA
20   82.9  62.8     .03   0.0      0      -TSRA       BKN
21   82.2  56.5     .09   0.0      0       FG         TSRA
22   82.9  61.7       T   0.0      0       SKC       -TSRA
23   65.1  57.9     .10   0.0      0       FG         TSRA FG
24   70.7  54.1     .03   0.0      0      -TSRA       FEW
25   73.4  46.9     .04   0.0      0       FG        -SHRA
26   75.7  51.3     .00   0.0      0       SKC        SCT
27   82.6  46.9     .00   0.0      0       SCT        SCT
28   80.2  57.9       T   0.0      0       BKN       -RA
29   80.8  58.1     .06   0.0      0       BKN        TSRA
30   67.3  49.6     .61   0.0      0      +TSRA       TSRA

KEY TO AM/PM WX: SKC - sky clear, FEW - few clouds, SCT -
partly cloudy, BKN - mostly cloudy, OVC - overcast, RA -
rain, SHRA - rain shower, DZ - drizzle, FG - fog, TSRA - 
thunderstorm with rain, GR - hail.


------------------------------------------------------------------
Means and Totals for April 2004
------------------------------------------------------------------
Average Maximum Temperature:      73.5
Average Minimum Temperature:      51.4

Mean Temperature:                 62.5

Maximum Temperature:              84.2  (4-16-04)
Minimum Temperature:              34.9  (4-14-04)

Days with max temperature 90.0F+:    0             Year:       0
Days with max temperature <32.0F:    0             Year:       2
Days with min temperature <32.0F:    0             Year:      35
Days with min temperature <0.0F:     0             Year:       0

Precipitation:                    2.09             Year:    8.99
Greatest one-day precipitation:    .84  (4-10-04)

Snowfall:                            T*            Year:       T
Greatest one-day snowfall:           T* (4-10-04)
Maximum snow depth at midnight:      0

Days with measureable pcpn:         10             Year:      34
Days with pcpn 1.00"+:               0             Year:       2
Days with measureable snowfall:      0             Year:       0
Days with snowfall 1"+:              0             Year:       0
Days with glaze ice:                 0             Year:       2
Days with damaging wind:             1             Year:       1
Days with hail:                      1             Year:       1
Days with thunderstorms:             9             Year:      13
Days with fog:                       5             Year:      13

NOTICE: All temperatures are in degrees Fahrenheit and all precipitation values in inches. Snowfall totals denoted by an asterisk indicate hail.


Summary....April 2004 saw a fair amount of days with rain and thunderstorms in central Oklahoma. The span from the 19th-24th was particularly active as widespread thunderstorms developed all over the state. Most of these storms just missed Norman however, as only .25 inch of rain fell here those six days. A small low pressure center did develop on the backside of some weakening storms on the morning of the 20th, and produced winds strong enough to snap tree limbs and cause scattered power outages. Large amounts of hail fell in Oklahoma City on the 21st. Other storms occurred in the area on the 9th-10th - with small hail occurring here in Norman early on the 10th. There was also a very active lightning display here in Norman from storms on the night of the 29th-30th. Temperatures for the most part were seasonable, although an impressive cold front went through the area on the 12th. Measurable snow occurred in western Oklahoma on the 12th, and our low temperature on the 14th was actually cooler than the lowest temperature recorded here during March.

Turlock CA continued to have a very warm, dry spring. Only .09 inch of rain fell there in April 2004, which brought the season total to 9.83 inches through the end of the month.