Alert archive / Oklahoma / Flash Flood Warnings in 2020

Flash Flood Warning 39, NWS Tulsa, OK

September 1, 20207 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at Sep 1, 2020, 1:07 AM CDT for 7 counties in Oklahoma. It was in force for 7 hr. 2 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: Sep 1, 2020, 1:07 AM CDT (06:07 UTC)
Expired: Sep 1, 2020, 8:15 AM CDT
In force: 7 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Haskell County, OK, Latimer County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK

The radar

The Tulsa radar (KINX), 111 km from the middle of the area, began a volume at 06:08 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
Sep 1, 2:54 AM CDT	FLASH FLOOD	Mcalester, OK	EM REPORTS THAT A VEHICLE HAD STALLED UNDER A TRAIN BRIDGE JUST WEST OF ELECTRIC AND MAIN STREET. POLICE BARRICADED ELECTRIC STREET FROM MAIN TO A ST.
Sep 1, 8:09 AM CDT	FLASH FLOOD	Mcalester, OK	STATE HIGHWAY 31 WEST BOUND IS CLOSED DUE TO WATER ON ROADWAY PER OKDOT.

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

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.1 hours before the alert went out and 263 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: 365 J/kg
Mixed-layer CIN: -244 J/kg
Mixed-layer LCL: 1328 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 118 m²/s²
0-3 km storm-relative helicity: 164 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

496 
WGUS54 KTSA 010607
FFWTSA
OKC061-077-091-101-107-111-121-010915-
/O.NEW.KTSA.FF.W.0039.200901T0607Z-200901T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
107 AM CDT Tue Sep 1 2020

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Southern Muskogee County in east central Oklahoma...
  Southeastern Okfuskee County in east central Oklahoma...
  Southeastern Okmulgee County in northeastern Oklahoma...
  Western Haskell County in southeastern Oklahoma...
  Northwestern Latimer County in southeastern Oklahoma...
  McIntosh County in southeastern Oklahoma...
  Pittsburg County in southeastern Oklahoma...

* Until 415 AM CDT.

* At 107 AM CDT, Public reported a foot of water over highway 69 and 
  state highway 150n near Eufaula. Between 1 and 3 inches of rain 
  have fallen. Rainfall rates of 1 to 2 inches per hour are expected 
  with locally higher rates possible. Flash flooding is already 
  occurring.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Public.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that may experience flash flooding include...
  Mcalester...                       Eufaula...
  Stigler...                         Henryetta...
  Checotah...                        Hartshorne...
  Krebs...                           Warner...
  Quinton...                         Dewar...
  Porum...                           Savanna...
  Webbers Falls...                   Crowder...
  Whitefield...                      Oktaha...
  Alderson...                        Kinta...
  Canadian...                        Indianola...

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the 
dangers of flooding.

&&

LAT...LON 3529 9611 3541 9611 3551 9592 3560 9556
      3570 9527 3520 9496 3500 9537 3481 9532
      3483 9609 3505 9609 3506 9607 3509 9606
      3512 9603 3512 9601 3515 9601 3515 9598
      3529 9598

FLASH FLOOD...OBSERVED

$$

Snider

3 follow-up statements

826 
WGUS74 KTSA 010803
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
303 AM CDT Tue Sep 1 2020

OKC061-077-091-101-107-111-121-010915-
/O.CON.KTSA.FF.W.0039.000000T0000Z-200901T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Haskell OK-Latimer OK-McIntosh OK-Muskogee OK-Okfuskee OK-Okmulgee
OK-Pittsburg OK-
303 AM CDT Tue Sep 1 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM CDT EARLY THIS 
MORNING FOR SOUTHEASTERN MUSKOGEE, SOUTHEASTERN OKFUSKEE, SOUTH 
CENTRAL OKMULGEE, WESTERN HASKELL, NORTHWESTERN LATIMER, MCINTOSH 
AND PITTSBURG COUNTIES...

At 303 AM CDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 3 and 4 inches of rain have 
fallen. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar indicated.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that may experience flash flooding include...
Mcalester...                       Eufaula...
Stigler...                         Henryetta...
Checotah...                        Hartshorne...
Krebs...                           Warner...
Quinton...                         Dewar...
Porum...                           Savanna...
Webbers Falls...                   Crowder...
Whitefield...                      Alderson...
Kinta...                           Canadian...
Indianola...                       Hanna...

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles. Move to higher ground now. Act quickly to 
protect your life. Be especially cautious at night when it is harder 
to recognize the dangers of flooding.

&&

LAT...LON 3529 9611 3541 9611 3548 9591 3548 9560
      3560 9521 3520 9496 3500 9537 3481 9532
      3483 9609 3505 9609 3506 9607 3509 9606
      3512 9603 3512 9601 3515 9601 3515 9598
      3529 9598

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

RBD

901 
WGUS54 KTSA 010857
FFWTSA
OKC061-077-091-101-107-111-121-011315-
/O.EXT.KTSA.FF.W.0039.000000T0000Z-200901T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
357 AM CDT Tue Sep 1 2020

The National Weather Service in Tulsa has extended the

* Flash Flood Warning for...
  Southeastern Muskogee County in east central Oklahoma...
  Southeastern Okfuskee County in east central Oklahoma...
  South Central Okmulgee County in northeastern Oklahoma...
  Western Haskell County in southeastern Oklahoma...
  Northwestern Latimer County in southeastern Oklahoma...
  McIntosh County in southeastern Oklahoma...
  Pittsburg County in southeastern Oklahoma...

* Until 815 AM CDT.

* At 357 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 3 and 4 inches of rain 
  have fallen. Flash flooding is already occurring.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar indicated.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that may experience flash flooding include...
  Mcalester...                       Eufaula...
  Stigler...                         Henryetta...
  Checotah...                        Hartshorne...
  Krebs...                           Warner...
  Quinton...                         Dewar...
  Porum...                           Savanna...
  Webbers Falls...                   Crowder...
  Whitefield...                      Alderson...
  Kinta...                           Canadian...
  Indianola...                       Hanna...

Additional rainfall amounts of 1 to 2 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Move to higher ground now. Act quickly to protect your life.

&&

LAT...LON 3529 9611 3541 9611 3548 9591 3548 9560
      3560 9521 3520 9496 3500 9537 3481 9532
      3483 9609 3505 9609 3506 9607 3509 9606
      3512 9603 3512 9601 3515 9601 3515 9598
      3529 9598

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

RBD

369 
WGUS74 KTSA 011029
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
529 AM CDT Tue Sep 1 2020

OKC061-077-091-101-107-111-121-011315-
/O.CON.KTSA.FF.W.0039.000000T0000Z-200901T1315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Haskell OK-Latimer OK-McIntosh OK-Muskogee OK-Okfuskee OK-Okmulgee
OK-Pittsburg OK-
529 AM CDT Tue Sep 1 2020

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 815 AM CDT THIS 
MORNING FOR SOUTHEASTERN MUSKOGEE, SOUTHEASTERN OKFUSKEE, SOUTH 
CENTRAL OKMULGEE, WESTERN HASKELL, NORTHWESTERN LATIMER, MCINTOSH 
AND PITTSBURG COUNTIES...

At 529 AM CDT, Doppler radar indicated thunderstorms producing heavy 
rain spreading back into the warned area. Between 4 and 6 inches of 
rain have fallen. Flash flooding is already occurring.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar indicated.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that may experience flash flooding include...
Mcalester...                       Eufaula...
Stigler...                         Henryetta...
Checotah...                        Hartshorne...
Krebs...                           Warner...
Quinton...                         Dewar...
Porum...                           Savanna...
Webbers Falls...                   Crowder...
Whitefield...                      Alderson...
Kinta...                           Canadian...
Indianola...                       Hanna...

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles. Move to higher ground now. Act quickly to 
protect your life.

&&

LAT...LON 3529 9611 3541 9611 3548 9591 3548 9560
      3560 9521 3520 9496 3500 9537 3481 9532
      3483 9609 3505 9609 3506 9607 3509 9606
      3512 9603 3512 9601 3515 9601 3515 9598
      3529 9598

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

RBD

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 31, 7:02 PM CDT	Special Weather Statement	TSA	Osage	28 min
Aug 31, 7:18 PM CDT	Special Weather Statement	TSA	Washington	27 min
Aug 31, 7:46 PM CDT	Special Weather Statement	TSA	Osage	29 min
Aug 31, 7:54 PM CDT	Areal Flood Advisory	TSA	Osage	3 hr
Sep 1, 12:29 AM CDT	Areal Flood Advisory	TSA	Haskell, Latimer, McIntosh, Muskogee, Okfuskee, Okmulgee and 1 more	4 hr
Sep 1, 12:34 AM CDT	Areal Flood Advisory	TSA	Osage, Pawnee, Rogers, Tulsa	3 hr
Sep 1, 12:44 AM CDT	Areal Flood Advisory	TSA	Haskell, Latimer, LeFlore	4 hr
Sep 1, 12:49 AM CDT	Tornado Warning	TSA	Pittsburg	26 min
Sep 1, 12:59 AM CDT	Flash Flood Warning Emergency	TSA	Haskell, Latimer, LeFlore	10 hr
Sep 1, 1:14 AM CDT	Tornado Warning	TSA	Pittsburg	32 min
Sep 1, 1:34 AM CDT	Special Weather Statement	TSA	LeFlore	56 min
Sep 1, 1:50 AM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	40 min
Sep 1, 2:04 AM CDT	River Flood Warning	TSA	LeFlore	38 hr
Sep 1, 2:14 AM CDT	Flash Flood Warning	TSA	Haskell, LeFlore, Muskogee, Sequoyah	5 hr
Sep 1, 2:19 AM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	41 min
Sep 1, 3:28 AM CDT	Flash Flood Warning	TSA	Adair, Cherokee	3 hr
Sep 1, 3:45 AM CDT	Flash Flood Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	7 hr
Sep 1, 6:00 AM CDT	Areal Flood Warning	TSA	Adair	5 hr
Sep 1, 6:54 AM CDT	Areal Flood Warning	TSA	Haskell, LeFlore, Muskogee, Sequoyah	5 hr
Sep 1, 8:35 AM CDT	Areal Flood Warning	TSA	Haskell, Latimer, McIntosh, Muskogee, Okfuskee, Okmulgee and 1 more	3 hr
Sep 1, 9:26 AM CDT	Special Weather Statement	TSA	Choctaw	64 min
Sep 1, 10:37 AM CDT	Areal Flood Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	18 hr
Sep 1, 10:39 AM CDT	Special Weather Statement	TSA	Choctaw	51 min
Sep 1, 10:40 AM CDT	Flash Flood Warning	TSA	Choctaw, Pushmataha	6 hr
Sep 1, 10:45 AM CDT	Areal Flood Warning	TSA	Haskell, Latimer, LeFlore	18 hr
Sep 1, 11:47 AM CDT	Areal Flood Warning	TSA	Haskell, Latimer, LeFlore, McIntosh, Pittsburg, Sequoyah	3 hr
Sep 1, 5:06 PM CDT	Areal Flood Warning	TSA	Choctaw, Pushmataha	3 hr
Sep 1, 5:39 PM CDT	River Flood Warning	TSA	Pushmataha	21 hr

Nearby

Flash Flood Warnings in Oklahoma, 2020 Every flash flood warning in 2020

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.