Strong to severe thunderstorms developed over northwestern Texas and southwestern Oklahoma during the evening of the 18th. These storms moved northeast and affected portions of northeastern Oklahoma during the early morning hours of the 19th. Although instability had decreased ahead of these storms during the night-time hours, wind shear had strengthened significantly as these storms moved into northeast Oklahoma. As a result, one of these storms produced a tornado in Creek County. In addition, some of these thunderstorms moved repeatedly across the same areas, which resulted in locally heavy rainfall that combined with saturated soils, produced flash flooding. Another round of thunderstorms moved across northeastern Oklahoma later that morning. Another tornado developed with these thunderstorms, as well as locally damaging wind and flash flooding.
In addition to the flash flooding and severe weather, these multiple rounds of thunderstorms resulted in widespread heavy rainfall across northeastern Oklahoma. One to three inches fell across much of the area, with a heavier axis of three to six inches. This widespread heavy rainfall resulted in moderate flooding of the Caney and Neosho Rivers, and major flooding of the Illinois River.

Tornado in OKFUSKEE, OKLAHOMA
From 19-MAR-20 09:25:00 to 19-MAR-20 09:29:00 (CST-6)
Location: OKEMAH
Tornado F-scale: EF1
Property damage: 30.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed south of I-40 and west of the N3760 Road. It moved east-northeast destroying a large outbuilding, damaging a home, and snapping large tree limbs as it crossed S 14th Street. Another outbuilding was destroyed east of S 14th Street, and large tree limbs were snapped as it crossed Highway 27. The tornado appeared to dissipate before crossing the N3780 Road, south of the E1100 Road. Based on this damage, maximum estimated wind in the tornado was 90 to 100 mph.

Flood in ADAIR, OKLAHOMA
From 19-MAR-20 17:45:00 to 20-MAR-20 22:15:00 (CST-6)
Location: CHEWEY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Illinois River near Chewey rose above its flood stage of 12 feet at 6:45 pm CDT on March 19th. The river crested at 20.09 feet at 10:15 am CDT on the 20th, resulting in major flooding. This crest was the sixth highest crest ever recorded at this site. Very severe flooding occurred from near Fidler's Bend to near Hanging Rock, with numerous cabins flooded in permanent campgrounds, and portions of Chewey Road were inundated east of Chewey Bridge. Monetary damage from this flood is unknown. The river fell below flood stage at 11:15 pm CDT on the 20th.

Flash Flood in TULSA, OKLAHOMA
From 19-MAR-20 06:00:00 to 19-MAR-20 06:45:00 (CST-6)
Location: COLLINSVILLE
Flood cause: Heavy Rain
Property damage: 75.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Horsepen Mobile Home Park was flooded by Horsepen Creek. Three swift water rescues were necessary.

Flash Flood in TULSA, OKLAHOMA
From 19-MAR-20 06:30:00 to 19-MAR-20 06:45:00 (CST-6)
Location: SKIATOOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Portions of Highway 20 were flooded between Collinsville and Skiatook.

Flash Flood in TULSA, OKLAHOMA
From 19-MAR-20 09:38:00 to 19-MAR-20 11:45:00 (CST-6)
Location: BROKEN ARROW
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Portions of several streets were flooded on the northwest side of Broken Arrow.

Flash Flood in MUSKOGEE, OKLAHOMA
From 19-MAR-20 10:48:00 to 19-MAR-20 14:00:00 (CST-6)
Location: HATBOX ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Portions of N 32nd Street were flooded in Muskogee.

Flash Flood in TULSA, OKLAHOMA
From 19-MAR-20 10:50:00 to 19-MAR-20 14:00:00 (CST-6)
Location: TULSA R L JONES ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Storm Chaser

Streets were flooded around W 81st Street S and S Elwood Avenue.

Flash Flood in OKMULGEE, OKLAHOMA
From 19-MAR-20 11:05:00 to 19-MAR-20 14:00:00 (CST-6)
Location: BEGGS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

Portions of Highway 75A were flooded and closed north of Beggs.

Flash Flood in MUSKOGEE, OKLAHOMA
From 19-MAR-20 11:08:00 to 19-MAR-20 15:45:00 (CST-6)
Location: WARNER
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Several streets in Warner were flooded.

Flood in TULSA, OKLAHOMA
From 19-MAR-20 04:00:00 to 21-MAR-20 13:00:00 (CST-6)
Location: COLLINSVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Caney River near Collinsville rose above its flood stage of 26 feet at 5:00 am CDT on March 19th. The river crested at 30.49 feet at 3:15 pm CDT on the 19th, resulting in moderate flooding. Rural roads were flooded. The river fell below flood stage at 2:00 pm CDT on the 21st.

Flood in OTTAWA, OKLAHOMA
From 19-MAR-20 08:30:00 to 22-MAR-20 04:30:00 (CST-6)
Location: NORTH MIAMI
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Neosho River near Commerce rose above its flood stage of 15 feet at 9:30 am CDT on March 19th. The river crested at 19.16 feet at 4:15 pm CDT on the 20th, resulting in moderate flooding. Low lying areas around Miami were flooded, including Riverview Park, and Highway 125 near the Fairgrounds was flooded. The river fell below flood stage at 5:30 am CDT on the 22nd.

Flood in CHEROKEE, OKLAHOMA
From 19-MAR-20 11:30:00 to 21-MAR-20 15:30:00 (CST-6)
Location: TAHLEQUAH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Illinois River near Tahlequah rose above its flood stage of 11 feet at 12:30 pm CDT on March 19th. The river crested at 20.47 feet at 9:30 pm CDT on the 20th, resulting in major flooding. Severe flooding occurred from near Hanging Rock to near Tahlequah, where cabins and parks were severely flooded and portions of Highway 10 were impassable. Monetary damage from this flood is unknown. The river fell below flood stage at 4:30 pm CDT on the 21st.

Thunderstorm Wind in ADAIR, OKLAHOMA
From 19-MAR-20 09:02:00 to 19-MAR-20 09:02:00 (CST-6)
Location: STILWELL
Magnitude: 61.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Strong thunderstorm wind estimated to 70 mph damaged a gas station.

Tornado in CREEK, OKLAHOMA
From 19-MAR-20 00:53:00 to 19-MAR-20 00:55:00 (CST-6)
Location: OLIVE
Tornado F-scale: EF0
Property damage: 35.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

This tornado developed just south of Highway 33 and west of S 433rd West Avenue, where large tree limbs were snapped. It moved northeast destroying an open air barn, uprooting a tree, and damaging a home. The tornado then blew the roof from a mobile home, and blew the roof off a barn east of S 433rd West Avenue. Based on this damage, maximum estimated wind in the tornado was 80 to 85 mph.

Flood in ADAIR, OKLAHOMA
From 19-MAR-20 13:45:00 to 20-MAR-20 15:15:00 (CST-6)
Location: WATTS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Official NWS Observations

The Illinois River near Watts rose above its flood stage of 13 feet at 2:45 pm CDT on March 19th. The river crested at 22.00 feet at 2:30 am CDT on the 20th, resulting in moderate flooding. Severe flooding occurred from the Arkansas border to Fidler's Bend, with numerous cabins and permanent campgrounds flooded. The river fell below flood stage at 4:15 pm CDT on the 20th.