Alert archive / Oklahoma / Flash Flood Warnings in 2018

Flash Flood Warning 3, NWS Tulsa, OK

April 6, 2018McIntosh County, Okmulgee County, Oklahoma

NWS Tulsa, OK issued this flash flood warning at Apr 6, 2018, 11:55 AM CDT for McIntosh County, Okmulgee County, Oklahoma. It was in force for 4 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: Apr 6, 2018, 11:55 AM CDT (16:55 UTC)
Expired: Apr 6, 2018, 4:00 PM CDT
In force: 4 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties McIntosh County, OK, Okmulgee County, OK

The radar

The Tulsa radar (KINX), 77 km from the middle of the area, began a volume at 16:59 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

Norman, OK (KOUN), launched 12:00Z, 4.9 hours before the alert went out and 141 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: 177 J/kg
Mixed-layer CIN: -224 J/kg
Mixed-layer LCL: 600 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 308 m²/s²
0-3 km storm-relative helicity: 340 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

As transmitted.

186 
WGUS54 KTSA 061655
FFWTSA
OKC091-111-062100-
/O.NEW.KTSA.FF.W.0003.180406T1655Z-180406T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
1155 AM CDT FRI APR 6 2018

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  McIntosh County in southeastern Oklahoma...
  Okmulgee County in northeastern Oklahoma...

* Until 400 PM CDT

* At 1153 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Radar estimates and mesonet 
  observations indicate that between 2 and 3 inches of rain has 
  fallen over the past few hours. Flash flooding is expected to 
  begin shortly.

* Some locations that may experience flooding include...
  Okmulgee...                       Eufaula...
  Henryetta...                      Morris...
  Beggs...                          Dewar...
  Schulter...                       Grayson...
  Hanna...                          Hoffman...
  Stidham...                        Preston...
  Raiford...                        Bald Hill...
  Vivian...                         Okmulgee State Park...
  Lake Eufaula State Park...        Liberty...
  Hitchita...                       Vernon...

Okmulgee county emergency management reports several roads closed in 
the county due to flooding.

This includes Interstate 40 in Oklahoma between mile markers 234 and
262.

Turn around, don't drown.
 
LAT...LON 3583 9619 3586 9601 3585 9585 3573 9577
      3567 9571 3555 9571 3555 9562 3530 9543
      3530 9550 3527 9551 3517 9590 3530 9598
      3538 9598 3538 9603 3547 9609 3555 9609
      3555 9614 3563 9619

$$

Lacy

1 follow-up statement

556 
WGUS74 KTSA 062056
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
356 PM CDT FRI APR 6 2018

OKC091-111-062106-
/O.EXP.KTSA.FF.W.0003.000000T0000Z-180406T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
McIntosh OK-Okmulgee OK-
356 PM CDT FRI APR 6 2018

...THE FLASH FLOOD WARNING FOR MCINTOSH AND OKMULGEE COUNTIES WILL
EXPIRE AT 400 PM CDT...

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

LAT...LON 3583 9619 3586 9601 3585 9585 3573 9577
      3567 9571 3555 9571 3555 9562 3530 9543
      3530 9550 3527 9551 3517 9590 3530 9598
      3538 9598 3538 9603 3547 9609 3555 9609
      3555 9614 3563 9619

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 5:13 AM CDT	Special Weather Statement	TSA	Choctaw	62 min
Apr 6, 5:20 AM CDT	Special Weather Statement	TSA	Haskell	40 min
Apr 6, 5:37 AM CDT	Special Weather Statement	TSA	Sequoyah	23 min
Apr 6, 5:50 AM CDT	Special Weather Statement	TSA	Muskogee	25 min
Apr 6, 6:16 AM CDT	Special Weather Statement	TSA	Choctaw	44 min
Apr 6, 6:21 AM CDT	Special Weather Statement	TSA	Okmulgee	39 min
Apr 6, 6:28 AM CDT	Special Weather Statement	TSA	Haskell	47 min
Apr 6, 6:44 AM CDT	Special Weather Statement	TSA	Tulsa	46 min
Apr 6, 7:30 AM CDT	Special Weather Statement	TSA	LeFlore	45 min
Apr 6, 7:33 AM CDT	Special Weather Statement	TSA	Tulsa	42 min
Apr 6, 8:04 AM CDT	Special Weather Statement	TSA	Okmulgee	41 min
Apr 6, 8:10 AM CDT	Special Weather Statement	TSA	McIntosh	35 min
Apr 6, 8:37 AM CDT	Special Weather Statement	TSA	Okfuskee	38 min
Apr 6, 9:08 AM CDT	Areal Flood Advisory	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee	4 hr
Apr 6, 9:51 AM CDT	Special Weather Statement	TSA	Okmulgee	24 min
Apr 6, 11:43 AM CDT	Special Weather Statement	TSA	Pittsburg	47 min
Apr 6, 11:56 AM CDT	Special Weather Statement	TSA	Pushmataha	34 min
Apr 6, 12:04 PM CDT	Special Weather Statement	TSA	McIntosh	26 min
Apr 6, 12:34 PM CDT	Special Weather Statement	TSA	LeFlore	26 min
Apr 6, 12:47 PM CDT	Special Weather Statement	TSA	Pittsburg	28 min
Apr 6, 1:48 PM CDT	River Flood Warning	TSA	LeFlore	35 hr
Apr 6, 3:14 PM CDT	Special Weather Statement	TSA	Choctaw	46 min
Apr 6, 3:23 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw, Pushmataha	19 min

Nearby

Flash Flood Warnings in Oklahoma, 2018 Every flash flood warning in 2018

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.