Alert archive / Oklahoma / Flash Flood Warnings in 2017

Flash Flood Warning 9, NWS Tulsa, OK

April 29, 20177 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at Apr 29, 2017, 10:35 AM CDT for 7 counties in Oklahoma. It was in force for 8 hr. 7 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 29, 2017, 10:35 AM CDT (15:35 UTC)
Expired: Apr 29, 2017, 6:30 PM CDT
In force: 8 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Cherokee County, OK, Delaware County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Sequoyah County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 73 km from the middle of the area, began a volume at 15:38 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.

What was reported inside it

Time	Report	Where	Remark
Apr 29, 11:12 AM CDT	FLASH FLOOD	Checotah, OK	NUMEROUS STREETS FLOODED IN TOWN.
Apr 29, 12:26 PM CDT	FLASH FLOOD	Muskogee, OK	FLOODING NEAR GIBSON STREET AND THE MUSKOGEE TURNPIKE.
Apr 29, 12:39 PM CDT	FLASH FLOOD	Muskogee, OK	FLOODING IN GRANDVIEW NEIGHBORHOOD SOUTH SIDE OF MUSKOGEE.
Apr 29, 3:37 PM CDT	HEAVY RAIN 8.45	2 Wsw Tahlequah, OK
Apr 29, 3:42 PM CDT	HEAVY RAIN 6.32	4 Ene Hulbert, OK
Apr 29, 3:42 PM CDT	HEAVY RAIN 6.93	9 Wsw Tahlequah, OK
Apr 29, 3:55 PM CDT	HEAVY RAIN 2.46	Webbers Falls, OK	RAINFALL OVER THE PAST 6 HOURS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 3.6 hours before the alert went out and 193 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: 8 J/kg
Mixed-layer CIN: -530 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

302 
WGUS54 KTSA 291535
FFWTSA
OKC021-041-091-097-101-135-145-292130-
/O.NEW.KTSA.FF.W.0009.170429T1535Z-170429T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
1035 AM CDT SAT APR 29 2017

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Southwestern Delaware County in northeastern Oklahoma...
  McIntosh County in southeastern Oklahoma...
  Northwestern Sequoyah County in east central Oklahoma...
  Mayes County in northeastern Oklahoma...
  Eastern Wagoner County in northeastern Oklahoma...
  Cherokee County in east central Oklahoma...
  Muskogee County in east central Oklahoma...

* Until 430 PM CDT

* At 1034 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 1 to 3 inches of rain have 
  fallen. Flash flooding is expected to begin shortly.

* Some locations that may experience flooding include...
  Muskogee...                       Tahlequah...
  Wagoner...                        Eufaula...
  Pryor...                          Pryor Creek...
  Fort Gibson...                    Checotah...
  Chouteau...                       Warner...
  Locust Grove...                   Salina...
  Gore...                           Langley...
  Porum...                          Okay...
  Webbers Falls...                  Hulbert...
  Porter...                         Spavinaw...

Additional rainfall amounts of 2 to 4 inches are possible in the 
warned area.

This includes Interstate 40 in Oklahoma between mile markers 247 and
289.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3591 9498 3591 9481 3538 9514 3537 9516
      3535 9515 3534 9518 3530 9518 3529 9521
      3530 9531 3529 9535 3533 9540 3530 9544
      3530 9550 3529 9552 3528 9592 3555 9576
      3555 9571 3563 9571 3651 9520 3651 9495

$$

2 follow-up statements

245 
WGUS74 KTSA 291839
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
139 PM CDT SAT APR 29 2017

OKC021-041-091-097-101-135-145-292130-
/O.CON.KTSA.FF.W.0009.000000T0000Z-170429T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Delaware OK-McIntosh OK-Sequoyah OK-Mayes OK-Wagoner OK-Cherokee OK-
Muskogee OK-
139 PM CDT SAT APR 29 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM CDT FOR
SOUTHWESTERN DELAWARE...MCINTOSH...NORTHWESTERN SEQUOYAH...MAYES...
EASTERN WAGONER...CHEROKEE AND MUSKOGEE COUNTIES...

At 128 PM CDT, trained weather spotters reported flash flooding
in the Grandview neighborhood in Muskogee as well as near 
Gibson Street and the Muskogee Turnpike around 1230 PM. 
At least 2 to 4 inches of rain has already fallen with at 
least 3.46" from the Tahlequah mesonet. Many streets are 
currently flooded in Tahlequah. 

Some locations that may experience flooding include...
Muskogee...                       Tahlequah...
Wagoner...                        Eufaula...
Pryor...                          Pryor Creek...
Fort Gibson...                    Checotah...
Chouteau...                       Warner...
Locust Grove...                   Salina...
Gore...                           Langley...
Porum...                          Okay...
Webbers Falls...                  Hulbert...
Porter...                         Spavinaw...

Recent radar shows additional storms moving into the area. 
Additional rainfall amounts of 1 to 3" are possible in
the warned area.

This includes Interstate 40 in Oklahoma between mile markers 247 and
289.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses as
well as other drainage areas and low lying spots.

Stay away or be swept away. River banks and culverts can become
unstable and unsafe.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 3591 9498 3591 9481 3538 9514 3537 9516
      3535 9515 3534 9518 3530 9518 3529 9521
      3530 9531 3529 9535 3533 9540 3530 9544
      3530 9550 3529 9552 3528 9592 3555 9576
      3555 9571 3563 9571 3651 9520 3651 9495

$$

600 
WGUS54 KTSA 292107
FFWTSA
OKC021-041-091-097-101-135-145-292330-
/O.EXT.KTSA.FF.W.0009.000000T0000Z-170429T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
407 PM CDT SAT APR 29 2017

The National Weather Service in Tulsa has extended the

* Flash Flood Warning for...
  Southwestern Delaware County in northeastern Oklahoma...
  McIntosh County in southeastern Oklahoma...
  Northwestern Sequoyah County in east central Oklahoma...
  Mayes County in northeastern Oklahoma...
  Eastern Wagoner County in northeastern Oklahoma...
  Cherokee County in east central Oklahoma...
  Muskogee County in east central Oklahoma...

* Until 630 PM CDT

* At 402 PM CDT, trained weather spotters reported flash flooding
  across the warned area. At least 5 to 8 inches of rain
  have fallen across portions of the warned area. At the Tahlequah 
  mesonet, 6.93 inches of rain has been observed with other 6 inch 
  reports near Cherokee. The AWOS station just west of Tahlequah 
  measured 8.45 inches of rain. Flash flooding is already occurring.

* Some locations that may experience flooding include...
  Muskogee...                       Tahlequah...
  Wagoner...                        Eufaula...
  Pryor...                          Pryor Creek...
  Fort Gibson...                    Checotah...
  Chouteau...                       Warner...
  Locust Grove...                   Salina...
  Gore...                           Langley...
  Porum...                          Okay...
  Webbers Falls...                  Hulbert...
  Porter...                         Spavinaw...

Latest radar trends show the heaviest rains have exited the warned 
area for now. However, additional rainfall amounts of 1 to 2 inches 
are possible in the warned area through early evening.

This includes Interstate 40 in Oklahoma between mile markers 247 and 
289.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Stay away or be swept away. River banks and culverts can become
unstable and unsafe.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

&&

LAT...LON 3591 9498 3591 9481 3538 9514 3537 9516
      3535 9515 3534 9518 3530 9518 3529 9521
      3530 9531 3529 9535 3533 9540 3530 9544
      3530 9550 3529 9552 3528 9592 3555 9576
      3555 9571 3563 9571 3651 9520 3651 9495

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 9:54 PM CDT	Special Weather Statement	TSA	LeFlore	36 min
Apr 28, 10:00 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore, Sequoyah	45 min
Apr 28, 10:25 PM CDT	Tornado Warning	TSA	LeFlore, Sequoyah	35 min
Apr 28, 10:45 PM CDT	Special Weather Statement	TSA	McIntosh	30 min
Apr 28, 10:48 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	27 min
Apr 28, 10:58 PM CDT	Tornado Warning	TSA	LeFlore, Sequoyah	31 min
Apr 28, 11:01 PM CDT	Special Weather Statement	TSA	Tulsa	29 min
Apr 28, 11:07 PM CDT	Special Weather Statement	TSA	Osage	23 min
Apr 28, 11:10 PM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Pittsburg	65 min
Apr 28, 11:15 PM CDT	Severe Thunderstorm Warning	TSA	Osage	30 min
Apr 28, 11:18 PM CDT	Severe Thunderstorm Warning	TSA	Rogers, Tulsa	27 min
Apr 28, 11:25 PM CDT	Special Weather Statement	TSA	Creek	35 min
Apr 28, 11:40 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	35 min
Apr 28, 11:48 PM CDT	Severe Thunderstorm Warning	TSA	Adair	27 min
Apr 28, 11:53 PM CDT	Special Weather Statement	TSA	Washington	37 min
Apr 29, 12:03 AM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Delaware, McIntosh, Mayes, Muskogee and 3 more	4 hr
Apr 29, 12:11 AM CDT	Special Weather Statement	TSA	Delaware	34 min
Apr 29, 12:13 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	32 min
Apr 29, 12:18 AM CDT	Special Weather Statement	TSA	Mayes	27 min
Apr 29, 12:26 AM CDT	Special Weather Statement	TSA	Muskogee, Wagoner	34 min
Apr 29, 12:27 AM CDT	Special Weather Statement	TSA	Nowata	18 min
Apr 29, 12:43 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	32 min
Apr 29, 12:46 AM CDT	Special Weather Statement	TSA	Mayes	29 min
Apr 29, 12:49 AM CDT	Special Weather Statement	TSA	Osage	26 min
Apr 29, 12:54 AM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Muskogee, Wagoner	4 hr
Apr 29, 12:54 AM CDT	Special Weather Statement	TSA	Muskogee	36 min
Apr 29, 1:00 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Muskogee, Wagoner	30 min
Apr 29, 1:15 AM CDT	Special Weather Statement	TSA	Adair	30 min
Apr 29, 1:26 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Delaware	34 min
Apr 29, 1:28 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	47 min
Apr 29, 1:36 AM CDT	Special Weather Statement	TSA	Washington	24 min
Apr 29, 1:54 AM CDT	Special Weather Statement	TSA	Cherokee	36 min
Apr 29, 2:01 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Delaware	29 min
Apr 29, 2:04 AM CDT	Special Weather Statement	TSA	Nowata	26 min
Apr 29, 2:07 AM CDT	Special Weather Statement	TSA	Pawnee	38 min
Apr 29, 2:21 AM CDT	Areal Flood Advisory	TSA	Craig, Delaware, Mayes, Ottawa	3 hr
Apr 29, 2:41 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	34 min
Apr 29, 2:46 AM CDT	Special Weather Statement	TSA	Delaware, Ottawa	44 min
Apr 29, 3:03 AM CDT	Special Weather Statement	TSA	Pawnee	57 min
Apr 29, 3:34 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Pawnee	56 min
Apr 29, 3:39 AM CDT	Special Weather Statement	TSA	Osage	36 min
Apr 29, 4:15 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Osage, Pawnee, Tulsa	30 min
Apr 29, 4:40 AM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Rogers, Tulsa, Washington	35 min
Apr 29, 5:07 AM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Muskogee, Wagoner	6 hr
Apr 29, 5:13 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Mayes, Nowata, Rogers, Tulsa, Washington	32 min
Apr 29, 5:17 AM CDT	Special Weather Statement	TSA	Pawnee	28 min
Apr 29, 5:40 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	35 min
Apr 29, 5:42 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Mayes, Nowata, Ottawa, Rogers	33 min
Apr 29, 6:14 AM CDT	Severe Thunderstorm Warning	TSA	Craig, Delaware, Ottawa	31 min
Apr 29, 6:16 AM CDT	Special Weather Statement	TSA	Washington	44 min
Apr 29, 6:19 AM CDT	Special Weather Statement	TSA	Osage	41 min
Apr 29, 6:36 AM CDT	Special Weather Statement	TSA	Creek, Pawnee	39 min
Apr 29, 6:42 AM CDT	Flash Flood Warning	TSA	Osage, Pawnee	4 hr
Apr 29, 6:45 AM CDT	Severe Thunderstorm Warning	TSA	Delaware, Ottawa	24 min
Apr 29, 8:17 AM CDT	River Flood Warning	TSA	Osage	30 hr
Apr 29, 8:33 AM CDT	Areal Flood Advisory	TSA	Creek, Muskogee, Okfuskee, Okmulgee, Osage, Pawnee and 3 more	3 hr
Apr 29, 8:38 AM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Delaware	10 hr
Apr 29, 10:36 AM CDT	Flash Flood Warning	TSA	Craig, Delaware, Ottawa	8 hr
Apr 29, 10:37 AM CDT	Special Weather Statement	TSA	Delaware	23 min
Apr 29, 12:36 PM CDT	Flash Flood Warning	TSA	Adair, Cherokee, Haskell, LeFlore, Sequoyah	6 hr
Apr 29, 12:55 PM CDT	Special Weather Statement	TSA	Sequoyah	35 min
Apr 29, 1:16 PM CDT	Special Weather Statement	TSA	Rogers, Tulsa	29 min
Apr 29, 1:24 PM CDT	Special Weather Statement	TSA	Okmulgee	36 min
Apr 29, 2:23 PM CDT	River Flood Warning	TSA	Pawnee	32 hr
Apr 29, 2:39 PM CDT	Flash Flood Warning	TSA	Craig, Mayes, Muskogee, Nowata, Rogers, Wagoner	4 hr
Apr 29, 3:05 PM CDT	Special Weather Statement	TSA	McIntosh	25 min
Apr 29, 3:13 PM CDT	Areal Flood Warning	TSA	Creek, McIntosh, Okmulgee, Osage, Pawnee, Rogers and 2 more	6 hr
Apr 29, 3:46 PM CDT	Special Weather Statement	TSA	Latimer	29 min
Apr 29, 4:12 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	33 min
Apr 29, 4:15 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Muskogee	30 min
Apr 29, 4:19 PM CDT	Tornado Warning	TSA	Adair, Sequoyah	26 min
Apr 29, 4:42 PM CDT	Tornado Warning	TSA	Haskell	33 min
Apr 29, 4:43 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Sequoyah	32 min
Apr 29, 4:49 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, McIntosh, Muskogee, Pittsburg	26 min
Apr 29, 4:54 PM CDT	Special Weather Statement	TSA	Pittsburg	36 min
Apr 29, 4:58 PM CDT	Tornado Warning	TSA	Adair	14 min
Apr 29, 5:01 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Sequoyah	29 min
Apr 29, 5:03 PM CDT	Special Weather Statement	TSA	McIntosh	42 min
Apr 29, 5:09 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Muskogee, Sequoyah	36 min
Apr 29, 5:16 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Muskogee	29 min

Nearby

Flash Flood Warnings in Oklahoma, 2017 Every flash flood warning in 2017

Sources

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