Alert archive / Oklahoma / Areal Flood Advisories in 2021

Areal Flood Advisory 21, NWS Tulsa, OK

May 19, 2021Nowata County, Rogers County, Washington County, Oklahoma

NWS Tulsa, OK issued this areal flood advisory at May 19, 2021, 5:17 PM CDT for Nowata County, Rogers County, Washington County, Oklahoma. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued: May 19, 2021, 5:17 PM CDT (22:17 UTC)
Expired: May 19, 2021, 9:15 PM CDT
In force: 4 hr
Issued by: NWS Tulsa, OK
Area: Storm-based polygon

Counties Nowata County, OK, Rogers County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 48 km from the middle of the area, began a volume at 22:21 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 12:00Z, 10.3 hours before the alert went out and 173 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: 65 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 524 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 58 m²/s²
0-3 km storm-relative helicity: 62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

852 
WGUS84 KTSA 192217
FLSTSA

Flood Advisory
National Weather Service Tulsa OK
517 PM CDT Wed May 19 2021

OKC105-131-147-200215-
/O.NEW.KTSA.FA.Y.0021.210519T2217Z-210520T0215Z/
/00000.N.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Nowata OK-Rogers OK-Washington OK-
517 PM CDT Wed May 19 2021

The National Weather Service in Tulsa has issued a

* Urban and Small Stream Flood Advisory for...
  Nowata County in northeastern Oklahoma...
  Northwestern Rogers County in northeastern Oklahoma...
  Washington OK County in northeastern Oklahoma...

* Until 915 PM CDT.

* At 517 PM CDT, Doppler radar indicated potential for heavy rain 
  due to bands of showers moving into the area. This will cause 
  urban and small stream flooding.

Some locations that will experience flooding include...
  Bartlesville...                    Claremore...
Nowata...                          Dewey...
Oologah...                         South Coffeyville...
Copan...                           Ramona...
Ochelata...                        Delaware...
Foyil...                           Lenapah...
Talala...                          Vera...
Wann...                            Watova...

1 to 2 inches of rainfall is expected over the area. This rain will 
result in minor flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3642 9600 3700 9600 3700 9552 3696 9555
      3678 9559 3658 9552 3643 9550 3635 9546
      3629 9575 3640 9579 3642 9579

$$

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 4:49 PM CDT	Areal Flood Advisory	TSA	Craig, Mayes, Nowata, Rogers	3 hr
May 19, 4:57 PM CDT	Areal Flood Advisory	TSA	Rogers, Tulsa, Wagoner	3 hr

Nearby

Areal Flood Advisories in Oklahoma, 2021 Every areal flood advisory in 2021

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.