Alert archive / Oklahoma / Flash Flood Warnings in 2021

Flash Flood Warning 25, NWS Tulsa, OK

May 27, 2021Crawford County, Franklin County, Sebastian County, Arkansas; 6 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at May 27, 2021, 8:47 PM CDT for Crawford County, Franklin County, Sebastian County, Arkansas; 6 counties in Oklahoma. It was in force for 2 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 27, 2021, 8:47 PM CDT (01:47 UTC)
Expired
May 27, 2021, 10:47 PM CDT
In force
2 hr
Issued by
NWS Tulsa, OK
Area
Storm-based polygon
Flood severity
None

Counties Crawford County, AR, Franklin County, AR, Sebastian County, AR, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Pittsburg County, OK, Pushmataha County, OK, Sequoyah County, OK

The radar

The Western Arkansas radar (KSRX), 55 km from the middle of the area, began a volume at 01:50 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

Shreveport, LA (KSHV), launched 00:00Z, 1.8 hours before the alert went out and 327 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-pSkew-T log-p diagram, Shreveport, LA at 00:00Z on 2021-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 686 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 2021-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
686 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1424 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
149 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.6

Open this sounding in Storm Lab

The text

As transmitted.

835 
WGUS54 KTSA 280147
FFWTSA
ARC033-047-131-OKC061-077-079-121-127-135-280445-
/O.NEW.KTSA.FF.W.0025.210528T0147Z-210528T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
847 PM CDT Thu May 27 2021

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Crawford County in northwestern Arkansas...
  Northwestern Franklin County in west central Arkansas...
  Northern Sebastian County in west central Arkansas...
  Eastern Sequoyah County in east central Oklahoma...
  Haskell County in southeastern Oklahoma...
  Latimer County in southeastern Oklahoma...
  Central Le Flore County in southeastern Oklahoma...
  Eastern Pittsburg County in southeastern Oklahoma...
  North Central Pushmataha County in southeastern Oklahoma...

* Until 1145 PM CDT.

* At 847 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly with an additional 1 to 2 inches of rain possible.

  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 will experience flash flooding include...
  Fort Smith...                      Van Buren...
  Mcalester...                       Poteau...
  Wilburton...                       Stigler...
  Cedarville...                      Mountainburg...
  Natural Dam...                     Greenwood...
  Alma...                            Barling...
  Pocola...                          Muldrow...
  Roland...                          Lavaca...
  Spiro...                           Hartshorne...
  Krebs...                           Arkoma...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3460 9572 3517 9576 3529 9528 3526 9524
      3532 9517 3542 9476 3564 9447 3575 9449
      3576 9397 3538 9398 3468 9499

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1 INCH IN 2 HOURS 

$$

RJS
1 follow-up statement
125 
WGUS74 KTSA 280347
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
1047 PM CDT Thu May 27 2021

ARC033-047-131-OKC061-077-079-121-127-135-280357-
/O.CAN.KTSA.FF.W.0025.000000T0000Z-210528T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Crawford AR-Franklin AR-Sebastian AR-Haskell OK-Latimer OK-Le Flore
OK-Pittsburg OK-Pushmataha OK-Sequoyah OK-
1047 PM CDT Thu May 27 2021

...FLASH FLOOD WARNING FOR CRAWFORD, NORTHWESTERN FRANKLIN, NORTHERN 
SEBASTIAN, EASTERN SEQUOYAH, HASKELL, LATIMER, CENTRAL LE FLORE, 
EASTERN PITTSBURG AND NORTH CENTRAL PUSHMATAHA COUNTIES HAS BEEN 
REPLACED WITH A FLOOD WARNING...

Rain will be tapering off over the next couple of hours. However, 
the potential for flooding will be continuing through the overnight 
hours.

LAT...LON 3460 9572 3517 9576 3529 9528 3526 9524
      3532 9517 3542 9476 3564 9447 3575 9449
      3576 9397 3538 9398 3468 9499

$$

RJS

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 7:26 PM CDTSpecial Weather StatementTSAMadison34 min
May 27, 8:16 PM CDTSpecial Weather StatementTSACrawford29 min
May 27, 8:58 PM CDTSpecial Weather StatementTSAFranklin32 min
May 27, 10:00 PM CDTFlash Flood WarningTSAFranklin, Sebastian3 hr
May 27, 10:47 PM CDTAreal Flood WarningTSACrawford, Franklin, Sebastian8 hr
May 28, 9:14 AM CDTRiver Flood AdvisoryTSACrawford3 hr
May 27, 7:07 PM CDTTornado WarningTSAMcIntosh28 min
May 27, 7:27 PM CDTAreal Flood WarningTSAOttawa12 hr
May 27, 7:30 PM CDTSpecial Weather StatementTSAMuskogee30 min
May 27, 7:32 PM CDTSevere Thunderstorm WarningTSAHaskell, McIntosh, Muskogee, Pittsburg43 min
May 27, 7:33 PM CDTAreal Flood WarningTSAOsage, Pawnee, Rogers, Tulsa, Washington11 hr
May 27, 7:37 PM CDTFlash Flood WarningTSAAdair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 3 more3 hr
May 27, 7:49 PM CDTSpecial Weather StatementTSASequoyah26 min
May 27, 7:53 PM CDTSpecial Weather StatementTSASequoyah37 min
May 27, 7:54 PM CDTRiver Flood WarningTSAOsage19 hr
May 27, 7:55 PM CDTRiver Flood WarningTSAOsage, Tulsa31 hr
May 27, 7:56 PM CDTRiver Flood WarningTSATulsa44 hr
May 27, 7:58 PM CDTRiver Flood WarningTSARogers, Tulsa36 hr
May 27, 8:01 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore, Pittsburg44 min
May 27, 8:03 PM CDTSpecial Weather StatementTSALatimer27 min
May 27, 8:04 PM CDTRiver Flood AdvisoryTSACherokee49 hr
May 27, 8:24 PM CDTSpecial Weather StatementTSALatimer36 min
May 27, 8:36 PM CDTSevere Thunderstorm WarningTSAHaskell, Latimer, LeFlore39 min
May 27, 8:51 PM CDTAreal Flood WarningTSACreek, Okfuskee, Okmulgee10 hr
May 27, 8:52 PM CDTSevere Thunderstorm WarningTSALeFlore53 min
May 27, 8:54 PM CDTAreal Flood WarningTSAAdair, Cherokee, Muskogee, Okmulgee, Wagoner10 hr
May 27, 10:43 PM CDTAreal Flood WarningTSAAdair, Cherokee, Haskell, McIntosh, Muskogee, Okfuskee and 3 more8 hr
May 28, 9:14 AM CDTRiver Flood WarningTSALeFlore18 hr

Nearby

Flash Flood Warnings in Oklahoma, 2021Flash Flood Warnings in Arkansas, 2021Every flash flood warning 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.