Alert archive / Oklahoma / Flash Flood Warnings in 2020

Flash Flood Warning 16, NWS Tulsa, OK

May 22, 2020Haskell County, Latimer County, Pittsburg County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 22, 2020, 11:36 PM CDT for Haskell County, Latimer County, Pittsburg 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: May 22, 2020, 11:36 PM CDT (04:36 UTC)
Expired: May 23, 2020, 2:30 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Haskell County, OK, Latimer County, OK, Pittsburg County, OK

The radar

The Western Arkansas radar (KSRX), 68 km from the middle of the area, began a volume at 04:38 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 4.6 hours before the alert went out and 209 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: 3106 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 970 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 7.5

Open this sounding in Storm Lab

The text

As transmitted.

692 
WGUS54 KTSA 230436
FFWTSA
OKC061-077-121-230730-
/O.NEW.KTSA.FF.W.0016.200523T0436Z-200523T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
1136 PM CDT Fri May 22 2020

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Haskell County in southeastern Oklahoma...
  Northern Latimer County in southeastern Oklahoma...
  Northeastern Pittsburg County in southeastern Oklahoma...

* Until 230 AM CDT.

* At 1135 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. The storms are tracking over 
  the same areas that have been hit earlier in the evening. 
  Therefore, the potential for flash flooding has increased and is 
  expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar indicated.

  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 flooding include...
  Stigler...                        Quinton...
  Keota...                          Red Oak...
  Mccurtain...                      Crowder...
  Whitefield...                     Kinta...
  Canadian...                       Blocker...
  Robbers Cave State Park...        Arrowhead State Park...
  Mc Curtain...                     Enterprise...
  Lequire...                        Kanima...
  Featherston...                    Lewisville...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3492 9566 3517 9568 3527 9526 3526 9524
      3528 9521 3535 9494 3535 9490 3537 9484
      3536 9483 3534 9483 3532 9481 3521 9482
      3520 9493 3494 9493

FLASH FLOOD...RADAR INDICATED

$$

Lacy

1 follow-up statement

065 
WGUS74 KTSA 230657
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
157 AM CDT Sat May 23 2020

OKC061-077-121-230730-
/O.CON.KTSA.FF.W.0016.000000T0000Z-200523T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Haskell OK-Latimer OK-Pittsburg OK-
157 AM CDT Sat May 23 2020

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR
HASKELL...NORTHERN LATIMER AND NORTHEASTERN PITTSBURG COUNTIES...

At 156 AM CDT, Doppler radar indicated the heavy rains have ended 
across the warned area. If current trends continue, the flash flood 
warning will be allowed to expire at 230 AM.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Radar indicated.

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 flooding include...
Stigler...                        Quinton...
Keota...                          Red Oak...
Mccurtain...                      Crowder...
Whitefield...                     Kinta...
Canadian...                       Blocker...
Robbers Cave State Park...        Arrowhead State Park...
Mc Curtain...                     Enterprise...
Lequire...                        Kanima...
Featherston...                    Lewisville...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3492 9566 3517 9568 3527 9526 3526 9524
      3528 9521 3535 9494 3535 9490 3537 9484
      3536 9483 3534 9483 3532 9481 3521 9482
      3520 9493 3494 9493

FLASH FLOOD...RADAR INDICATED

$$

Lacy

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tulsa, OK wrote its last area forecast discussion before this flash flood warning went out at May 22, 9:50 PM CDT, 1 hour 46 minutes earlier.

Area forecast discussion, May 22, 9:50 PM CDT, 1 hour 46 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
950 PM CDT Fri May 22 2020

.DISCUSSION...
Scattered strong to severe thunderstorms continue across parts of
southeast Oklahoma and west central Arkansas at this time. This
activity will continue into the overnight hours, with additional
storms moving into southeast Oklahoma from the west.

Have adjusted pops overnight based on current and expected trends,
with the rest of the forecast looking good at this time.

Update on the way.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...None.
AR...None.

&&

SHORT TERM...23
LONG TERM....05

PLATE

Hazardous weather outlook, May 22, 9:13 PM CDT, 2 hours 23 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
913 PM CDT Fri May 22 2020

ARZ001-002-010-011-019-020-029-OKZ049-053>076-231000-
Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK-
Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK-
Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK-
Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK-
Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK-
Washington OK-Washington AR-
913 PM CDT Fri May 22 2020

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...Tonight.

TORNADO.
    RISK...Limited.
	AREA...South of Interstate 40.
    ONSET...Ongoing.

SEVERE THUNDERSTORM.
	RISK...Elevated.
    AREA...South of Interstate 40.
	ONSET...Ongoing.

FLASH FLOOD.
	RISK...Limited.
	AREA...Far Southeast Oklahoma.
	ONSET...This Evening.

HEAVY RAIN.
	RISK...Limited.
	AREA...Southeast Oklahoma.
	ONSET...This Evening.

DISCUSSION...
Strong to severe thunderstorms have developed across southeast
Oklahoma and west central Arkansas this evening. The strongest
storms will be capable of producing golf ball hail and isolated,
brief tornadoes.  Storms currently across north central Texas and
southwest Oklahoma may impact southeast Oklahoma with additional
chances for severe weather as they move east or northeast later
this evening and into the overnight hours. Large hail and damaging
winds will be the main severe weather threats.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Local Spotter Activation May Be Needed.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.
SATURDAY...Thunderstorm Potential.
SUNDAY...Severe Thunderstorm Potential.
MONDAY...Thunderstorm Potential...Heavy Rain Potential.
TUESDAY through THURSDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
An unsettled weather pattern will bring daily thunderstorm
chances, mainly from the latter part of the holiday weekend on
into the following week. While some severe weather will be
possible, flooding may become the main threat. Pockets of locally
heavy rainfall, falling on areas likely to have received previous
rounds of heavy rainfall, may begin to cause river flooding and
localized flash flooding by early next week.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, May 22, 10:00 PM CDT, 1 hour 36 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1000 PM CDT Fri May 22 2020

OKZ071-073-074-230330-
Haskell OK-Pittsburg OK-McIntosh OK-
1000 PM CDT Fri May 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HASKELL...
SOUTHEASTERN MCINTOSH AND NORTHEASTERN PITTSBURG COUNTIES UNTIL 1030
PM CDT...

At 1000 PM CDT, a strong thunderstorm was located 3 miles northeast
of Arrowhead State Park, moving east at 20 mph.

Nickel size hail and winds in excess of 40 mph will be possible with
this storm.

Locations in or near the path include...
Quinton...                        Kinta...
Enterprise...                     Lewisville...

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
southeastern Oklahoma.

LAT...LON 3537 9535 3530 9535 3530 9531 3511 9524
      3512 9558 3522 9563
TIME...MOT...LOC 0300Z 253DEG 16KT 3518 9557

Local storm report, May 22, 10:18 PM CDT, 1 hour 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1018 PM CDT FRI MAY 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1013 PM     HAIL             GREENWOOD               35.22N 94.26W
05/22/2020  E1.75 INCH       SEBASTIAN          AR   PUBLIC

&&

BLH

Local storm report, May 22, 10:29 PM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1029 PM CDT FRI MAY 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0832 PM     HAIL             HEAVENER                34.89N 94.60W
05/22/2020  E2.75 INCH       LE FLORE           OK   PUBLIC

&&

BLH

Local storm report, May 22, 10:49 PM CDT, 47 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1049 PM CDT FRI MAY 22 2020

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1038 PM     HAIL             ENTERPRISE              35.23N 95.38W
05/22/2020  E1.00 INCH       HASKELL            OK   PUBLIC

&&

BLH

Special weather statement, May 22, 11:10 PM CDT, 26 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1110 PM CDT Fri May 22 2020

OKZ073>075-230445-
Haskell OK-Pittsburg OK-Latimer OK-
1110 PM CDT Fri May 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN HASKELL...
NORTHWESTERN LATIMER AND NORTHEASTERN PITTSBURG COUNTIES UNTIL 1145
PM CDT...

At 1110 PM CDT, a strong thunderstorm was located near Blocker,
moving east at 25 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations in or near the path include...
Quinton...                        Blocker...
Featherston...

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
southeastern Oklahoma.

LAT...LON 3501 9559 3513 9560 3520 9532 3499 9526
TIME...MOT...LOC 0410Z 262DEG 22KT 3506 9552

Special weather statement, May 22, 11:28 PM CDT, 8 minutes before

Special Weather Statement
National Weather Service Tulsa OK
1128 PM CDT Fri May 22 2020

ARZ029-OKZ076-230515-
Sebastian AR-Le Flore OK-
1128 PM CDT Fri May 22 2020

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN SEBASTIAN AND EAST
CENTRAL LE FLORE COUNTIES UNTIL 1215 AM CDT...

At 1128 PM CDT, a strong thunderstorm was located 6 miles northeast
of Howe, moving east at 35 mph.

Penny size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations in or near the path include...
Poteau...                         Mansfield...
Hartford...                       Huntington...
Midland...                        Patterson...
Arkola...                         Crossroads...
Dayton...

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
west central Arkansas...and southeastern Oklahoma.

LAT...LON 3510 9414 3509 9419 3508 9420 3508 9422
      3506 9425 3506 9423 3497 9424 3495 9434
      3496 9437 3494 9439 3495 9441 3493 9443
      3493 9445 3490 9445 3491 9463 3507 9462
      3515 9413
TIME...MOT...LOC 0428Z 264DEG 29KT 3499 9453

The office that day

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

Issued	Product	Office	Counties	Lasted
May 22, 7:11 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	49 min
May 22, 7:43 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	47 min
May 22, 8:00 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	45 min
May 22, 8:10 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	50 min
May 22, 8:26 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	49 min
May 22, 8:28 PM CDT	Tornado Warning	TSA	Latimer, Pittsburg	47 min
May 22, 8:40 PM CDT	Special Weather Statement	TSA	Sequoyah	35 min
May 22, 8:47 PM CDT	Tornado Warning	TSA	LeFlore	58 min
May 22, 8:58 PM CDT	Severe Thunderstorm Warning	TSA	Sequoyah	25 min
May 22, 9:06 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	54 min
May 22, 9:10 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	50 min
May 22, 9:15 PM CDT	Tornado Warning	TSA	Latimer	45 min
May 22, 9:16 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha	44 min
May 22, 9:52 PM CDT	Tornado Warning	TSA	LeFlore	38 min
May 22, 9:53 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	52 min
May 22, 9:56 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	49 min
May 22, 10:00 PM CDT	Special Weather Statement	TSA	McIntosh	30 min
May 22, 10:04 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Pittsburg	41 min
May 22, 10:10 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	50 min
May 22, 10:27 PM CDT	Tornado Warning	TSA	LeFlore	46 min
May 22, 10:37 PM CDT	Severe Thunderstorm Warning	TSA	LeFlore	53 min
May 22, 10:40 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Muskogee	50 min
May 22, 10:42 PM CDT	Flash Flood Warning	TSA	LeFlore	6 hr
May 22, 10:55 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	65 min
May 22, 11:10 PM CDT	Special Weather Statement	TSA	Latimer	35 min
May 22, 11:11 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, Pittsburg	49 min
May 22, 11:26 PM CDT	Tornado Warning	TSA	Haskell, Latimer, Pittsburg	49 min
May 22, 11:41 PM CDT	Special Weather Statement	TSA	Sequoyah	49 min
May 22, 11:47 PM CDT	Special Weather Statement	TSA	Choctaw	43 min
May 23, 12:13 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore	47 min
May 23, 12:28 AM CDT	Severe Thunderstorm Warning	TSA	LeFlore	47 min
May 23, 1:01 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	44 min
May 23, 1:20 AM CDT	Special Weather Statement	TSA	Wagoner	25 min
May 23, 1:43 AM CDT	Special Weather Statement	TSA	Mayes	32 min
May 23, 1:43 AM CDT	Severe Thunderstorm Warning	TSA	Choctaw	47 min
May 23, 1:52 AM CDT	Severe Thunderstorm Warning	TSA	Delaware, Mayes	38 min
May 23, 1:55 AM CDT	Special Weather Statement	TSA	Wagoner	35 min
May 23, 2:28 AM CDT	Special Weather Statement	TSA	Wagoner	32 min
May 23, 2:54 AM CDT	Special Weather Statement	TSA	Rogers	36 min
May 23, 4:20 AM CDT	Special Weather Statement	TSA	Haskell, Latimer, LeFlore	55 min
May 23, 8:51 AM CDT	River Flood Warning	TSA	LeFlore	19 hr
May 23, 8:51 AM CDT	River Flood Warning	TSA	LeFlore	6 days

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.