This report describes the historical weather record at the Chattanooga Metropolitan Airport (Chattanooga, Tennessee, United States) during 1950. This station has records back to January 1948.
Chattanooga, Tennessee has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by forests (89%), built-up areas (6%), lakes and rivers (3%), and croplands (3%)
Daylight saving time (DST) was observed at Chattanooga, Tennessee during 1950. There were two time changes during 1950:
1950 was not a leap year, so it has 365 days and no February 29th. The first leap year before 1950 was 1948 and the first after was 1952.
The summer and winter solstices and the spring and fall equinoxes mark the passing of the seasons. They fall on nearly the same day each year, with differences of a day or two depending on the year. In 1950 they occurred on:
|Spring Equinox||Tuesday, 21 March 1950.|
|Summer Solstice||Wednesday, 21 June 1950.|
|Fall Equinox||Saturday, 23 September 1950.|
|Winter Solstice||Friday, 22 December 1950.|
The hottest day of 1950 was June 26, with a high temperature of 96°F. For reference, on that day the average high temperature is 87°F and the high temperature exceeds 94°F only one day in ten. The hottest month of 1950 was June with an average daily high temperature of 86°F.
Relative to the average, the hottest day was January 25. The high temperature that day was 77°F, compared to the average of 50°F, a difference of 27°F. In relative terms the warmest month was January, with an average high temperature of 61°F, compared to an typical value of 49°F.
The longest warm spell was from October 20 to November 4, constituting 16 consecutive days with warmer than average high temperatures. The month of January had the largest fraction of warmer than average days with 90% days with higher than average high temperatures.
The coldest day of 1950 was November 25, with a low temperature of 4°F. For reference, on that day the average low temperature is 38°F and the low temperature drops below 28°F only one day in ten. The coldest month of 1950 was December with an average daily low temperature of 29°F.
Relative to the average, the coldest day was November 25. The low temperature that day was 4°F, compared to the average of 38°F, a difference of 34°F. In relative terms the coldest month was November, with an average low temperature of 33°F, compared to an typical value of 41°F.
The longest cold spell was from August 19 to August 31, constituting 13 consecutive days with cooler than average low temperatures. The month of July had the largest fraction of cooler than average days with 84% days with lower than average low temperatures.
The clearest month of 1950 was October, with 61% of days being more clear than cloudy. The longest spell of clear weather was from October 10 to October 19, constituting 10 consecutive days that were clearer than they were cloudy.
The cloudiest month of 1950 was January, with 81% of days being more cloudy than clear. The longest spell of cloudy weather was from January 9 to January 20, constituting 12 consecutive days that were cloudier than they were clear.
This station reports both the quantity of liquid precipitation and categorical observations of precipitation (e.g., moderate rain, or heavy snow). Both are subject to erroneous reports, but the former is particularly prone to false reports, especially ones indicating an excessive quantity of precipitation. Please bear this in mind when reading the extrema reported in this section.
The day with the largest quantity of precipitation was September 7. That day saw 3.626" of liquid (or liquid equivalent) precipitation, compared to a median value of 0.200". The month with the most precipitation was July, with 11.323", compared to a median value of 4.224".
As determined by quantitative measurements, the longest dry spell was from September 18 to October 4, constituting 17 consecutive days with no measured precipitation. The month with the largest fraction of dry days was October, with 81% of days reporting no measured precipitation at all.
The month with the largest fraction of days with at least some measured precipitation was January, with 61% of days reporting some measured precipitation.
This station reports when significant weather events (including precipitation) are visually observed at or near the station. Such events do not always correspond to measured quantities of liquid equivalent precipitation, such as when the event is near by not at the station, or in the case of solid precipitation that does not melt in the collection basin.
The day in 1950 with the most precipitation observations was January 28. There were 22 hourly weather reports that day (out of a maximum of 24) in which some form of precipitation was observated at or near the station. The month with the most precipitation observations was January, with 215 hourly present weather reports involving some form of precipitation.
As determined by the present weather reports, the longest dry spell was from September 23 to October 4, constituting 12 consecutive days with no observed precipitation. The month with the largest fraction of days without observed precipitation was October, with 77% of days reporting no observed precipitation at all.
The month with the largest fraction of days with at least some observed precipitation was January, with 84% of days reporting some observed precipitation.
In this section we consider only those weather reports that indicate liquid precipitation. For the purposes of this analysis, we include thunderstorms even though some thunderstorms are not accompanied by liquid precipitation.
The month of 1950 with the largest number of those reports was January, with a total of 215 reports. The day with the largest number of those reports was January 28, with a total of 22 reports.
This station reports when snow is observed falling but does not report the quantity of snow that has fallen or the depth of snow on the ground.
In this section we consider hourly weather reports that contain an observation of falling snow. These reports do not necessarily correspond to accumulation.
The first reported snow fall in 1950 was on November 22; the last was on March 13. The month of 1950 with the largest number of those reports was December, with a total of 48 reports. The day with the largest number of those reports was December 11, with a total of 10 reports.
Humidity is an important factor in determining how weather conditions feel to a person experiencing them. Hot and humid days feel even hotter than hot and dry days because the high level of water content in humid air discourages the evaporation of sweat from a person's skin.
When reading the graph below, keep in mind that the hottest part of the day tends to be the least humid, so the daily low (brown) traces are more relevant for understanding daytime comfort than the daily high (blue) traces, which typically occur during the night. Applying that observation, the least humid month of 1950 was April with an average daily low humidity of 32%, and the most humid month was January with an average daily low humidity of 64%.
But it is important to keep in mind that humidity does not tell the whole picture and the dew point is often a better measure of how comfortable a person will find a given set of weather conditions. Please see the next section for continued discussion of this point.
Dew point is the temperature below which water vapor will condense into liquid water. It is therefore also related to the rate of evaporation of liquid water. Since the evaporation of sweat is an important cooling mechanism for the human body, the dew point is an important measurement for understanding how dry, comfortable, or humid a given set of weather conditions will feel.
Generally speaking, dew points below 50°F will feel a bit dry to some people, but comfortable to people accustomed to dry conditions; dew points from 50°F to 68°F are fairly comfortable to most people, and dew points above 68°F are increasingly uncomfortable, becoming oppressive around 77°F.
To take some examples, and basing our categorization on the daily high dew point in 1950, January had 10 dry days, 21 comfortable days, and no humid days; April had 14 dry days, 16 comfortable days, and no humid days; July had no dry days, 4 comfortable days, and 27 humid days; and October had 1 dry day, 29 comfortable days, and 1 humid day.
The highest sustained wind speed was 30 mph, occurring on February 22; the highest daily mean wind speed was 17 mph (November 20);
The windiest month was March, with an average wind speed of 8 mph. The least windy month was October, with an average wind speed of 4 mph.
Visibility is the maximum distance at which a given reference object or light can be clearly discerned. In the United States, visibilities that are greater than or equal to 10 miles are typically reported as 10 miles.
The day of 1950 with the lowest average visibility was January 18, with an average visibility of 3.6 mi. The month with the lowest average visibility was December, with an average visibility of 10.3 mi. With an average visibility of 17.0 mi, the month of June had the highest average visibility.
The cloud ceiling is the altitude of the lowest layer of clouds that are at categorized as broken (mostly cloudy) or overcast (cloudy). If no such cloud layer exists then the ceiling is unlimited and no value is reported.
The day of 1950 with the lowest average cloud ceiling was May 16, with an average cloud ceiling of 0'. The month with the lowest average cloud ceiling was January, with an average cloud ceiling of 4542'. The month of June has the highest average cloud ceiling, with an average cloud ceiling of 14975'.