Alert archive / Oklahoma / Flash Flood Warnings in 2020

Flash Flood Warning 21, NWS Tulsa, OK

July 30, 20206 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at Jul 30, 2020, 12:33 AM CDT for 6 counties in 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: Jul 30, 2020, 12:33 AM CDT (05:33 UTC)
Expired: Jul 30, 2020, 3:30 AM CDT
In force: 3 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon
Flood severity: None

Counties Craig County, OK, Mayes County, OK, Nowata County, OK, Rogers County, OK, Tulsa County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 36 km from the middle of the area, began a volume at 05:32 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 00:00Z, 5.6 hours before the alert went out and 151 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: 595 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 609 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.1

Open this sounding in Storm Lab

The text

As transmitted.

722 
WGUS54 KTSA 300533
FFWTSA
OKC035-097-105-131-143-147-300830-
/O.NEW.KTSA.FF.W.0021.200730T0533Z-200730T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
1233 AM CDT Thu Jul 30 2020

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Southern Craig County in northeastern Oklahoma...
  Rogers County in northeastern Oklahoma...
  Mayes County in northeastern Oklahoma...
  Southern Washington County in northeastern Oklahoma...
  Southwestern Nowata County in northeastern Oklahoma...
  Northeastern Tulsa County in northeastern Oklahoma...

* Until 330 AM CDT.

* At 1232 AM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to one inch of rain has
  already fallen. Flash flooding is ongoing or 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...
  Claremore...                      Pryor...
  Pryor Creek...                    Skiatook...
  Collinsville...                   Chelsea...
  Salina...                         Oologah...
  Langley...                        Adair...
  Ramona...                         Ketchum...
  Spavinaw...                       Foyil...
  Disney...                         Talala...
  Big Cabin...                      Vera...
  Pensacola...                      New Alluwe...

Additional rainfall amounts of 2 to 3 inches are possible in the 
warned area.

This includes Interstate 44 between mile markers 248 and 279.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3657 9502 3621 9501 3634 9600 3666 9596

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

1 follow-up statement

988 
WGUS74 KTSA 300827
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
327 AM CDT Thu Jul 30 2020

OKC035-097-105-131-143-147-300837-
/O.EXP.KTSA.FF.W.0021.000000T0000Z-200730T0830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Rogers OK-Mayes OK-
327 AM CDT Thu Jul 30 2020

...THE FLASH FLOOD WARNING FOR NORTHEASTERN ROGERS AND NORTHWESTERN
MAYES COUNTIES WILL EXPIRE AT 330 AM 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 3657 9502 3621 9501 3634 9600 3666 9596

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 8:38 PM CDT	Special Weather Statement	TSA	Muskogee	37 min
Jul 29, 9:02 PM CDT	Special Weather Statement	TSA	Sequoyah	28 min
Jul 29, 9:27 PM CDT	Special Weather Statement	TSA	Adair	33 min
Jul 29, 10:21 PM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Sequoyah	3 hr
Jul 29, 10:41 PM CDT	Special Weather Statement	TSA	Washington	49 min
Jul 29, 11:10 PM CDT	Special Weather Statement	TSA	Craig, Nowata, Washington	35 min
Jul 29, 11:35 PM CDT	Special Weather Statement	TSA	Rogers, Washington	55 min
Jul 30, 12:00 AM CDT	Special Weather Statement	TSA	Osage, Pawnee	60 min
Jul 30, 12:18 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	42 min
Jul 30, 12:51 AM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee, Tulsa, Washington	39 min
Jul 30, 12:57 AM CDT	Special Weather Statement	TSA	Delaware	48 min
Jul 30, 1:10 AM CDT	Special Weather Statement	TSA	Creek	65 min
Jul 30, 1:16 AM CDT	Flash Flood Warning	TSA	Delaware, Mayes	3 hr
Jul 30, 1:27 AM CDT	Severe Thunderstorm Warning	TSA	Mayes, Osage, Rogers, Tulsa, Wagoner, Washington	63 min
Jul 30, 1:52 AM CDT	Areal Flood Advisory	TSA	Rogers, Tulsa, Wagoner	3 hr
Jul 30, 2:11 AM CDT	Special Weather Statement	TSA	Wagoner	49 min
Jul 30, 2:22 AM CDT	Special Weather Statement	TSA	Adair, Cherokee, Delaware, Mayes	53 min
Jul 30, 2:40 AM CDT	Special Weather Statement	TSA	Muskogee	65 min
Jul 30, 3:48 AM CDT	Special Weather Statement	TSA	Sequoyah	57 min
Jul 30, 5:24 AM CDT	Special Weather Statement	TSA	Pawnee	51 min
Jul 30, 6:14 AM CDT	Special Weather Statement	TSA	Creek, Okfuskee	61 min
Jul 30, 6:40 AM CDT	Areal Flood Advisory	TSA	Craig, Delaware, Mayes, Rogers	2 hr
Jul 30, 7:38 AM CDT	Areal Flood Advisory	TSA	McIntosh, Muskogee, Okmulgee	112 min
Jul 30, 5:04 PM CDT	Special Weather Statement	TSA	McIntosh	26 min
Jul 30, 5:06 PM CDT	Special Weather Statement	TSA	Pittsburg	24 min
Jul 30, 5:29 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	34 min
Jul 30, 6:05 PM CDT	Special Weather Statement	TSA	Pittsburg	25 min
Jul 30, 6:18 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	28 min
Jul 30, 6:22 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	53 min
Jul 30, 6:32 PM CDT	Special Weather Statement	TSA	Pittsburg	28 min
Jul 30, 6:47 PM CDT	Areal Flood Advisory	TSA	Pittsburg	3 hr
Jul 30, 6:56 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, Pittsburg	49 min

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.