An Excessive Heat Warning was in effect for portions of the forecast area for 7 days as a heat wave dominated the area. This was the longest duration Excessive Heat Warning that the Omaha office has issued. A total of 10 temperature records at Omaha, Lincoln, and Norfolk were tied or broken as the air temperature routinely topped 100�� and overnight low temperatures largely remained above 75��. High dew points led to heat indices that routinely topped 110��.
The heat wave began on August 19 as a mid-level ridge moved over the central CONUS. High temperatures during the stretch of hot weather climbed into the mid to upper 90s with a few locations topping 100��. Dew point temperatures were very high climbing into the 70s with some ground stations in southeast Nebraska and southwest Iowa reaching 80��. A temperature of 107�� was observed at Beatrice as strong afternoon mixing led to a drop in the dewpoint and a spike in temperature. This was the highest observed temperature by an automated station during the heatwave. Roughly 70 miles to the east, Falls City reached a temperature of 99�� with a dew point of 84�� which resulted in a heat index of 128��. That 128�� heat index was the highest of the entire country during the heatwave. It may be the highest calculated heat index ever for Nebraska.
A cold front moved into the area on August 20, but only brought relief to northeast Nebraska where temperatures were mostly at or below 90�� The heat continued in southeast Nebraska and southwest Iowa where heat indices ranged between 105�� and 110�� as temperatures were in the mid 90s and dew points in the upper 70s.
The Excessive Heat Warning was expanded to include the entire forecast area on Monday August 21 and was in effect for the entire area through Thursday August 24. The warning was in effect on August 25 for southeast Nebraska (including the cities of Omaha and Lincoln) and southwest Iowa. Temperatures during this period routinely reached 100�� and heat indices topped 110��. Little relief was had at night as overnight temperatures remained above 75��. Lincoln observed 5 straight days of 100�� temperatures from Aug 21-25 (and 6 of 7 days including Aug 19). That was the longest such streak for Lincoln since July 21-25, 2012.

Excessive Heat in WAYNE, NEBRASKA
From 21-AUG-23 11:30:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: AWOS

For 4 days beginning on August 21, the high temperature reached at least 96�� each day. The highest observed temperature was 101�� on August 23. The peak heat index reached at least 109�� all 4 days. The highest calculated heat index was a 118��.

Excessive Heat in BURT, NEBRASKA
From 19-AUG-23 15:00:00 to 19-AUG-23 19:00:00 (CST-6)
Reported by: ASOS

On August 19, the temperature in Tekamah peaked at 95��. The heat index was at or above 110�� approximately 4 hours. The peak calculated heat index was 112��.

Excessive Heat in BURT, NEBRASKA
From 21-AUG-23 12:00:00 to 24-AUG-23 19:00:00 (CST-6)
Reported by: ASOS

For 4 days beginning on August 21 in Tekamah, the high temperature reached at least 96�� each day. The highest observed temperature was 100�� on August 24. The peak heat index reached at least 113�� all 4 days. The highest calculated heat index was a 125�� occurring on August 21.

Excessive Heat in CEDAR, NEBRASKA
From 21-AUG-23 11:00:00 to 23-AUG-23 19:00:00 (CST-6)
Reported by: Unknown

For 3 days beginning on August 21, temperatures in Cedar County where in the upper 90s and some locations reached 100��. Dewpoint temperatures in the area were in the 70s which yielded a heat index of at least 110�� all three days.

Excessive Heat in SAUNDERS, NEBRASKA
From 19-AUG-23 12:00:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: AWOS

For 6 days in Wahoo, the high temperature reached at least 96�� for all but August 20. The highest observed temperature was 101�� on August 22. The peak heat index reached at least 108�� each day except on August 20. The highest calculated heat index was a 124�� on August 21.

Excessive Heat in STANTON, NEBRASKA
From 21-AUG-23 12:00:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 4 days beginning on August 21, the high temperature 7 miles northeast of Stanton reached at least 98��. The highest temperatures was 103�� on August 23. Dew point temperatures were in the mid to upper 70s and yielded a heat index at or above 105��.

Excessive Heat in THURSTON, NEBRASKA
From 21-AUG-23 12:00:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: Public

For 4 days beginning on August 21, high temperatures in Thurston County were in the mid to upper 90s. Dew point temperatures were in the mid to upper 70s and yielded a heat index at or above 105��.

Excessive Heat in GAGE, NEBRASKA
From 19-AUG-23 14:00:00 to 25-AUG-23 17:30:00 (CST-6)
Reported by: AWOS

For 7 days, the high temperature was above 103�� for all but August 20. The highest observed temperature was 107�� on August 19. The peak heat index reached at least 110�� for the first 5 days and reached 105�� on August 24 and August 25. The highest calculated heat index was a 120�� on August 19. The morning low temperatures never dropped below 72�� during the heat wave.

Excessive Heat in DODGE, NEBRASKA
From 19-AUG-23 13:00:00 to 24-AUG-23 18:30:00 (CST-6)
Reported by: AWOS

For 6 days, the high temperature was above 95�� for all but August 20. The highest observed temperature was 100�� on both August 22 and 23. The peak heat index reached at least 106�� each day except on August 20. The highest calculated heat index was a 117�� on August 21. The morning low temperatures never dropped below 69�� during the heat wave. The morning low didn't drop below 75�� August 22 through August 24.

Excessive Heat in CASS, NEBRASKA
From 19-AUG-23 11:30:00 to 25-AUG-23 14:00:00 (CST-6)
Reported by: AWOS

For 7 days, the high temperature in Plattsmouth was above 93�� for all but August 20.  The highest observed temperature was 98�� on August 24. The peak heat index reached at least 103�� each day except for August 20. The highest calculated heat index was a 118�� on August 22. From August 22 through August 25, the morning low temperature never dropped below 72��.

Excessive Heat in DOUGLAS, NEBRASKA
From 19-AUG-23 12:00:00 to 25-AUG-23 16:30:00 (CST-6)
Reported by: ASOS

For 7 days, the high temperature in Omaha was above 93��. The highest observed temperature was 104�� on August 24. The peak heat index reached at least 105�� each day. The highest calculated heat index was a 117�� on August 22.

Excessive Heat in PLATTE, NEBRASKA
From 19-AUG-23 14:00:00 to 19-AUG-23 18:00:00 (CST-6)
Reported by: AWOS

On August 19, the calculated heat index in Columbus was above 110�� for approximately 4 hours. The air temperature peaked at 96��.

Excessive Heat in MADISON, NEBRASKA
From 21-AUG-23 11:00:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: ASOS

For 4 days beginning on August 21, the high temperature in Norfolk reached at least 100��. The highest observed temperature was 102��, occurring on both August 22 and August 23. The peak heat index reached at least 102�� each day. The highest calculated heat index was a 112�� on August 21.

Excessive Heat in SARPY, NEBRASKA
From 19-AUG-23 13:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: AWOS

For 7 days, the high temperature at Offutt AFB reached at least 93��. The highest observed temperature was 102�� on August 24. The peak heat index reached at least 103�� each day. The highest calculated heat index was a 124�� on August 21. The morning low temperatures from August 20 through August 25 never dropped below 74��.

Excessive Heat in PLATTE, NEBRASKA
From 21-AUG-23 12:00:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: AWOS

For 4 days beginning on August 21 in Columbus, the high temperature reached at least 99�� each day. The highest observed temperature was 101�� on August 24. The peak heat index reached at least 110�� all 4 days. The highest calculated heat index was a 115�� occurring on August 21.

Excessive Heat in OTOE, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: AWOS

For 7 days, the high temperature was above 90�� and above 95�� for all but August 20.  The highest observed temperature was 101�� on August 24. The peak heat index reach at least 110�� for the first 5 days and was above 105�� on August 24 and 25. The highest calculated heat index was a 122�� on August 21. After August 19, the morning low temperatures never dropped below 74��.

Excessive Heat in SEWARD, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 7 days, the high temperature in Seward reached at least 99�� for all but August 20. The highest observed temperature was 104��, occurring on August 21, August 22, and August 24.

Excessive Heat in NEMAHA, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 7 days, the high temperature 5 miles east-southeast of Auburn reached at least 92��.  The highest observed temperature was 101��, occurring on both on August 19 and August 24. Dew point temperatures in the area were in the mid to upper 70s. This yielded heat indices at or above 105�� all 7 days.

Excessive Heat in PIERCE, NEBRASKA
From 21-AUG-23 11:00:00 to 24-AUG-23 19:00:00 (CST-6)
Reported by: Public

For 4 days beginning on August 21, the high temperature in Pierce County were in the mid to upper 90s with some locations reaching at least 100��. Dewpoint temperatures in the area were in the 70s which yielded a heat index of at least 105�� all 4 days.

Excessive Heat in KNOX, NEBRASKA
From 21-AUG-23 11:00:00 to 24-AUG-23 19:00:00 (CST-6)
Reported by: COOP Observer

For 3 days beginning on August 21, the high temperature 6 miles south-southeast of Verdel reached 100�� The highest observed temperature was 108�� on August 23. Dewpoint temperatures in the area were in the 70s which yielded a heat index of at least 110�� all three days.

Excessive Heat in WASHINGTON, NEBRASKA
From 19-AUG-23 12:30:00 to 24-AUG-23 19:00:00 (CST-6)
Reported by: AWOS

For 6 days in Blair, the high temperature was above 95�� for all but August 20. The highest observed temperature was 102�� on August 24. The peak heat index reached at least 109�� each day except on August 20. The highest calculated heat index was a 120�� on August 21. The morning low temperatures never dropped below 70�� during the heat wave. The morning low didn't drop below 77�� August 22 through August 24.

Excessive Heat in COLFAX, NEBRASKA
From 21-AUG-23 12:00:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: Public

For 4 days beginning on August 21, high temperatures in Colfax County were in the upper 90s and reached 100�� in some spots. Dew point temperatures were in the mid to upper 70s and yielded a heat index at or above 105��.

Excessive Heat in CUMING, NEBRASKA
From 21-AUG-23 12:00:00 to 24-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 4 days beginning on August 21, high temperatures in West Point ranged between 97-99��. Dew point temperatures were in the mid to upper 70s and yielded a heat index at or above 105��.

Excessive Heat in RICHARDSON, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: ASOS

For 7 days, the high temperature in Falls City was above 97�� for all but August 20.  The highest observed temperature was 103��, occurring on both August 23 and August 24. The peak heat index reached at least 114�� each day. The highest calculated heat index was a 128�� on August 19. This may have been the highest calculated heat index in the recorded history of Nebraska. After August 19, the morning low temperatures never dropped below 73��.

Excessive Heat in LANCASTER, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: ASOS

For 7 days, the high temperature in Lincoln was at or above 100�� for all but August 20. The highest observed temperature was 105��, occurring on both August 22 and August 24. The peak heat index reached at least 109�� each day. The highest calculated heat index was a 120�� on August 21.

Excessive Heat in JOHNSON, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 7 days, the high temperature 1 mile south of Tecumseh reached at least 101�� for all but August 20. The highest observed temperature was 104��, occurring on August 24 and August 25.

Excessive Heat in JEFFERSON, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 7 days, the high temperature 7 miles south of Fairbury reached at least 103�� for all but August 20. The highest observed temperature was 108�� on August 19. The minimum temperature did not drop below 74�� on the mornings of August 20 through August 25.

Excessive Heat in SALINE, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 7 days, the high temperature 4 miles east-southeast of Crete reached at least 99�� for all but August 20. The highest observed temperature was 102�� on August 23.

Excessive Heat in BUTLER, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: Public

For 7 days, the high temperatures in Butler County were in the mid 90s and reached 100�� in some locations. Dew point temperatures in the mid to upper 70s yielded a heat index at or above 105�� for 7 consecutive days.

Excessive Heat in PAWNEE, NEBRASKA
From 19-AUG-23 11:00:00 to 25-AUG-23 17:00:00 (CST-6)
Reported by: COOP Observer

For 7 days, the high temperature 4 miles north of Table Rock reached at least 92��.  The highest observed temperature was 104�� on August 19. The high temperature reached at least 100�� August 23, 24, and 25. Dew point temperatures in the area were in the mid to upper 70s. This yielded heat indices at or above 105�� all 7 days.