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Madison County, AL Weather and Climate Synopsis

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US Weekly Rainfall Departure



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A joint service of the UK Ag Weather Center and the National Weather Service.


- Heat: Major HeatRisk is expected to persist through the middle
  of the workweek.  Heat indices are forecast between 103 to 109
  degrees. A Heat Advisory is now in effect for portions of
  central Alabama on Tuesday.

- Thunderstorms: Isolated afternoon thunderstorms will remain in
  the forecast through Thursday, especially south of I-20. More
  organized rain chances will increase closer to the weekend, as a
  series of disturbances moves through the region.

Alabama Forecast Discussion (NWS)
National Ag. Weather Outlook, International Ag. Weather Summary

Current Surface Map, [2nd Source TWC]

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Regional Hourly Observations For MADISON County
1200 AM CDT TUE AUG 18 2026
NORTH CENTRAL ALABAMA
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
DECATUR AP     MOCLDY    76  75  97 CALM      30.02F FOG              
HUNTSVILLE AP  CLOUDY    75  75 100 E3        30.02F                  
MERIDIANVILLE  MOCLDY    76  74  92 MISG      30.03F                  
VINEMONT AP    CLOUDY    75  75 100 CALM      30.04F                  

Current Temperatures, Dewpoint, RH, Wind, Regional Obs, Surface 4-Panel


Current Agricultural Weather Conditions in Alabama
Based on observations at 1200am CDT, Tuesday August 18, 2026

Across Alabama...temperatures are near 76 degrees north, near 75 degrees central, and near CLOUDY degrees south. Current sky conditions are mostly cloudy north, mostly cloudy central, and regapt south. In the north, relative humidity is near 97%, and the dew point is near 75 degrees. In the central part of the state, relative humidity is near 90%, and the dew point is near 72 degrees. In the south, relative humidity is near 74%, and the dew point is near 76 degrees. The livestock heat stress category is no stress north, no stress central, and danger south. There is patchy fog north. Winds are calm north, where conditions are favorable for spraying. Winds are from the northeast at 6 mph central, where conditions are favorable for spraying. Winds are south, where conditions are not favorable for spraying due to regapt. Based on current available observations, the highest temperature is 82 degrees at Tuscaloosa. The lowest temperature is CLOUDY degrees at Mobile.


Current NOWCAST not available:
Nowcasts are not issued routinely during fair weather. Only when
precipitation or other significant weather is occuring in this county will these
forecasts be issued. Currently, there is no short term forecast in effect.

U.S. Radar Map, All NWS Radars (In near-real time), Current Livestock Heat Stress Index (LSI), Current Wind Chill Map
Hazardous Weather Outlook For MADISON County
Hazardous report currently not available
NWS Severe Weather Map , Convective Outlook

7-Day Forecast For MADISON County, Alabama
1227 AM CDT Tue Aug 18 2026

REST OF TONIGHT
Mostly cloudy late this evening, then becoming partly cloudy. Lows in the lower 70s. Light and variable winds.

TUESDAY
Partly cloudy in the morning then clearing. Highs in the lower 90s. North winds around 10 mph.

TUESDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 60s. Light and variable winds.

WEDNESDAY
Mostly sunny. Highs in the mid 90s. Light and variable winds.

WEDNESDAY NIGHT
Partly cloudy. A slight chance of showers and thunderstorms after midnight. Lows in the lower 70s. Light and variable winds. Chance of rain 20 percent.

THURSDAY
Partly cloudy with a slight chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 20 percent.

THURSDAY NIGHT
A slight chance of thunderstorms in the evening. Partly cloudy with a chance of showers. Lows in the lower 70s. Chance of rain 40 percent.

FRIDAY
Partly cloudy. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the lower 90s. Chance of rain 40 percent.

FRIDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows around 70.

SATURDAY THROUGH SUNDAY NIGHT
Mostly clear. Highs in the lower 90s. Lows in the upper 60s.

MONDAY
Partly cloudy. Highs in the lower 90s.

12-48 Hr Surface Forecast Maps, TWC 4-Panel Surface Forecast, Fire Danger, Day 1 Precip, Day 2 Precip, Days 1-5 Precip, Severe Weather Pot.-Day 1, Day 2


Medium & Long Range Outlook For Alabama
                              ALABAMA                                                                     
                 ---------------------------------------------
                 6 TO 10 DAY  8 TO 14 DAY   30 DAY    90 DAY 
                   AUG 23-27 AUG 25-AUG 31    JUN       JUN-AUG                      
                 -----------  -----------  --------  ---------
   Temperature:      Above        Above                                            
 Precipitation:     Normal       Normal                                            

....  Medium and long range outlooks provided by NCEP/K. Thomas Priddy
5 Day Rainfall Forecast, 6 to 10 Day , 8 to 14 Day , Text, 30-Day Outook, 90-Day Outook, 120-Day Outlook
Almanac Information


Historical Weather And Climate Facts For Today

//////////////////////////
AUGUST 18TH...HISTORIC WEATHER EVENTS
...1925...
During the late morning hours a severe hailstorm struck southeastern Iowa
completely destroying crops along a path six to ten miles wide and 75 miles
long. The hail also injured and killed poultry and livestock, and caused a
total of 2.5 million dollars damage. The hailstorm flattened fields of corn
to such an extent that many had to leave their farms in search of other
work. It was one of the worst hailstorms of record for the nation. (The
Weather Channel)
...1983...
Hurricane Alicia, a category 3 storm made landfall near Galveston. Winds 
gusted to 130 mph with a storm surge of 12 feet. 22 tornadoes were spawned. 
Parts of Houston received 11 inches of rain. 12 people died and 1800 were 
injured. Total damage estimated at $3 billion.
(NWS Louisville)
...1987...
Thirteen cities in the eastern U.S. reported record high temperatures for
the date, including Orlando FL with a reading of 98 degrees, and Portland
ME with a high of 94 degrees. Newark NJ reached 90 degrees for the
thirty-sixth time of the year, their second highest total of record. (The
National Weather Summary)
...1988...
Twenty-two cities, from the Carolinas to the Upper Ohio Valley, reported
record high temperatures for the date, pushing the total number of daily
record highs since the first of June above the 1100 mark. Afternoon highs
of 102 degrees at Greensboro NC and 105 degrees at Raleigh NC equalled
all-time records. Evening thunderstorms in Montana produced wind gusts to
75 mph at Scobey. (The National Weather Summary) (Storm Data)
...1989...
Thunderstorms over the Middle Atlantic Coast Region and the Upper Ohio
Valley produced torrential rains in eastern Virginia during the late
morning and afternoon hours. Totals ranged up to twelve inches at Yorktown.
Williamsburg VA was deluged with 10.78 inches of rain between 6 AM and 10
AM, with 6.72 inches reported in just two hours. Flash flooding caused
nearly twelve million dollars damage in Accomack County VA. Early evening
thunderstorms in the Central High Plains Region produced walnut size hail
and wind gusts to 80 mph around Casper WY. Thunderstorms produced locally
heavy rains in the Yellowstone Park area, causing fifteen mudslides. (The
National Weather Summary) (Storm Data)
...1995...
At 1 pm Bowling Green recorded an exceptionally high dew point of 81 degrees.
(NWS Louisville)

Ag Weather Center, Department of Biosystems & Agricultural Engineering, University of Kentucky