Alert archive / Oklahoma / Flash Flood Warnings in 2021

Flash Flood Warning 62, NWS Tulsa, OK

September 29, 2021McIntosh County, Muskogee County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Sep 29, 2021, 8:59 AM CDT for McIntosh County, Muskogee County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 29, 2021, 8:59 AM CDT (13:59 UTC)
Expired: Sep 29, 2021, 11:45 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties McIntosh County, OK, Muskogee County, OK

The radar

The Tulsa radar (KINX), 66 km from the middle of the area, began a volume at 13:58 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 2.0 hours before the alert went out and 210 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 337 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 1087 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

157 
WGUS54 KTSA 291359
FFWTSA
OKC091-101-291645-
/O.NEW.KTSA.FF.W.0062.210929T1359Z-210929T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
859 AM CDT Wed Sep 29 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Central Muskogee County in east central Oklahoma...
  Northeastern McIntosh County in southeastern Oklahoma...

* Until 1145 AM CDT.

* At 859 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 4 inches of rain 
  have fallen. The expected rainfall rate is 1 to 3 inches in 1 
  hour. Additional rainfall amounts of 0.5 to 1.5 inches are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Muskogee...                        Checotah...
  Oktaha...                          Rentiesville...
  Wainwright...                      Summit...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3570 9555 3571 9544 3570 9535 3543 9535
      3541 9549 3543 9559

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-3 INCHES IN 1 HOUR

$$

Snider

3 follow-up statements

517 
WGUS74 KTSA 291440
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
940 AM CDT Wed Sep 29 2021

OKC091-101-291645-
/O.CON.KTSA.FF.W.0062.000000T0000Z-210929T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McIntosh OK-Muskogee OK-
940 AM CDT Wed Sep 29 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 AM CDT THIS 
MORNING FOR CENTRAL MUSKOGEE AND NORTHEASTERN MCINTOSH COUNTIES...

At 940 AM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 1.5 and 5 inches of rain have 
fallen. Additional rainfall amounts up to 1 inch are possible in the 
warned area. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Muskogee...                        Checotah...
Oktaha...                          Rentiesville...
Wainwright...                      Summit...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3570 9555 3571 9544 3570 9535 3543 9535
      3541 9549 3543 9559

FLASH FLOOD...RADAR INDICATED

$$

Snider

630 
WGUS74 KTSA 291601
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
1101 AM CDT Wed Sep 29 2021

OKC091-101-291645-
/O.CON.KTSA.FF.W.0062.000000T0000Z-210929T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McIntosh OK-Muskogee OK-
1101 AM CDT Wed Sep 29 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1145 AM CDT THIS 
MORNING FOR CENTRAL MUSKOGEE AND NORTHEASTERN MCINTOSH COUNTIES...

At 1101 AM CDT, Doppler radar indicated thunderstorms producing 
heavy rain across the warned area. Between 1.5 and 5 inches of rain 
have fallen. Additional rainfall amounts of one half inches or less 
will be possible in the warned area as the heaviest rain has cleared 
the area. Flash flooding is ongoing but flood waters should begin to 
recede shortly if they haven't already.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Muskogee...                        Checotah...
Oktaha...                          Rentiesville...
Wainwright...                      Summit...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3570 9555 3571 9544 3570 9535 3543 9535
      3541 9549 3543 9559

FLASH FLOOD...RADAR INDICATED

$$

Snider

705 
WGUS74 KTSA 291650
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
1150 AM CDT Wed Sep 29 2021

OKC091-101-291700-
/O.EXP.KTSA.FF.W.0062.000000T0000Z-210929T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McIntosh OK-Muskogee OK-
1150 AM CDT Wed Sep 29 2021

...FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL MUSKOGEE AND 
NORTHEASTERN MCINTOSH COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3570 9555 3571 9544 3570 9535 3543 9535
      3541 9549 3543 9559

$$

Snider

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 29, 8:42 AM CDT	Areal Flood Advisory	TSA	McIntosh, Muskogee	17 min
Sep 29, 9:07 AM CDT	Special Weather Statement	TSA	Tulsa	23 min
Sep 29, 9:45 AM CDT	Special Weather Statement	TSA	Tulsa	15 min
Sep 29, 10:02 AM CDT	Special Weather Statement	TSA	Tulsa	28 min
Sep 29, 10:21 AM CDT	Areal Flood Advisory	TSA	Osage, Tulsa, Washington	3 hr

Nearby

Flash Flood Warnings in Oklahoma, 2021 Every flash flood warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.