National Weather Service United States Department of Commerce

Heavy Rainfall and Severe Thunderstorm Threats for the Plains and Southeast

A frontal boundary extending from the western High Plains to the Southeast will focus additional showers and thunderstorms this weekend. Some of these storms may become severe, alongside frequent lightning, and isolated instances of flash flooding. Meanwhile dry conditions will continue for the Great Basin where fire weather concerns linger. For the mid-Atlantic and Northeast, seasonable weather. Read More >

Basic Climate Data Explanation

Key to daily columns: (midnight to midnight Local Standard Time)

Observed Columns

Date - Day of month.
High Temp - Maximum temperature for the day
Low Temp - Minimum temperature for the day
Mean Temp - Average daily temperature
Pcpn - Precipitation amount for the day (liquid equivalent)
Snow Snfl - Snowfall amount for the day (includes sleet, hail, and glaze)
Snow Depth - Snow depth (taken at 1200 Universal Coordinated Time)
HDD - Heating Degree Days
CDD - Cooling Degree Days

Normals Columns

High Temp - Normal High Temperature for this date
Low Temp - Normal Low temperature for this date
Mean Temp - Normal Mean Temperature for this date
Pcpn - Normal Precipitation for this date
Snow Snfl - Normal Snowfall for this date
HDD - Normal Heating Degree Days for this date
CDD - Normal cooling degree days for this date

Miscellaneous

MTD - Month to Date...average temp, precip, etc for the Month
STD - Season to Date...average temp, precip, etc for the Season
YTD - Year to Date...average temp, precip, etc for the Year
DPT - Departure from normal (- is below normal, + is above normal)
M or MM - Data is Missing
T - A Trace of precipitation has been received