Alert archive / Oklahoma / Flash Flood Warnings in 2018

Flash Flood Warning 1, NWS Tulsa, OK

February 23, 20187 counties in Oklahoma

NWS Tulsa, OK issued this flash flood warning at Feb 23, 2018, 5:31 PM CST for 7 counties in Oklahoma. It was in force for 10 hr. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Feb 23, 2018, 5:31 PM CST (23:31 UTC)
Expired
Feb 24, 2018, 3:30 AM CST
In force
10 hr
Issued by
NWS Tulsa, OK
Area
Storm-based polygon
Flood severity
None

Counties Haskell County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 86 km from the middle of the area, began a volume at 23:32 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.

What was reported inside it

TimeReportWhereRemark
Feb 23, 6:44 PM CSTFLASH FLOODMuskogee, OKFAST MOVING WATER OVER GULICK ROAD AT QUAIL CREEK.
Feb 23, 8:15 PM CSTFLASH FLOOD1 E Eufaula, OKMPING REPORT OF CREEK OVERFLOWING PRODUCING LOCALIZED FLOODING.
Feb 23, 9:50 PM CSTFLASH FLOODChecotah, OKSEVERAL COUNTY ROADS UNDERWATER AND A FEW HAVE BEEN WASHED OUT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 11.5 hours before the alert went out and 145 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, Norman, OK at 12:00Z on 2018-02-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 2018-02-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 7 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1338 m above ground
0-6 km bulk shear
71 kt
0-1 km storm-relative helicity
7 m²/s²
0-3 km storm-relative helicity
24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

733 
WGUS54 KTSA 232331
FFWTSA
OKC061-091-101-107-111-121-145-240630-
/O.NEW.KTSA.FF.W.0001.180223T2331Z-180224T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
531 PM CST FRI FEB 23 2018

The National Weather Service in Tulsa has issued a

* Flash Flood Warning for...
  Haskell County in southeastern Oklahoma...
  McIntosh County in southeastern Oklahoma...
  Wagoner County in northeastern Oklahoma...
  Central Pittsburg County in southeastern Oklahoma...
  Muskogee County in east central Oklahoma...
  Okmulgee County in northeastern Oklahoma...
  Okfuskee County in east central Oklahoma...

* Until 1230 AM CST Saturday

* At 515 PM CST, Emergency Management reported several county roads 
  across Okmulgee County being flooded.  Widespread light to 
  moderate rain will continue to spread across the warned area 
  through much of the evening hours.  Additional rainfall amounts of 
  one half to one inch are likely which will lead to further 
  flooding impacts.   

* Some locations that may experience flooding include...
  Muskogee...                       Mcalester...
  Okmulgee...                       Wagoner...
  Okemah...                         Eufaula...
  Stigler...                        Okfuskee...
  Coweta...                         Henryetta...
  Fort Gibson...                    Checotah...
  Krebs...                          Haskell...
  Warner...                         Morris...
  Boley...                          Quinton...
  Weleetka...                       Dewar...

Additional rainfall amounts of one half to one inch are possible in 
the warned area.

This includes Interstate 40 in Oklahoma between mile markers 212 and
289.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3564 9619 3608 9546 3607 9521 3582 9527
      3581 9513 3553 9513 3541 9498 3520 9492
      3519 9493 3503 9551 3476 9609 3505 9609
      3515 9598 3529 9598 3529 9644 3546 9644
      3545 9655 3539 9654 3540 9655 3546 9662

$$
2 follow-up statements
750 
WGUS74 KTSA 240312
FFSTSA

Flash Flood Statement
National Weather Service Tulsa OK
912 PM CST FRI FEB 23 2018

OKC061-091-101-107-111-121-145-240630-
/O.CON.KTSA.FF.W.0001.000000T0000Z-180224T0630Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Haskell OK-McIntosh OK-Wagoner OK-Pittsburg OK-Muskogee OK-
Okmulgee OK-Okfuskee OK-
912 PM CST FRI FEB 23 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1230 AM CST FOR
HASKELL...MCINTOSH...WAGONER...CENTRAL PITTSBURG...MUSKOGEE...
OKMULGEE AND OKFUSKEE COUNTIES...

At 908 PM CST, the media reported water rescues ongoing in Muskogee. 
Additional reports of flooded roads have been received in the 
vicinity of McAlester.  Rainfall amounts of one half to one inch 
have fallen since 6 PM across the warned area. Flash flooding is 
ongoing and will worsen as light to moderate rain continues 
across the area through the evening hours.

Some locations that may experience flooding include...
Muskogee...                       Mcalester...
Okmulgee...                       Wagoner...
Okemah...                         Eufaula...
Stigler...                        Okfuskee...
Coweta...                         Henryetta...
Fort Gibson...                    Checotah...
Krebs...                          Haskell...
Warner...                         Morris...
Boley...                          Quinton...
Weleetka...                       Dewar...

Additional rainfall amounts of one half to one inch are possible in 
the warned area.

This includes Interstate 40 in Oklahoma between mile markers 212 and
289.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3564 9619 3608 9546 3607 9521 3582 9527
      3581 9513 3553 9513 3541 9498 3520 9492
      3519 9493 3503 9551 3476 9609 3505 9609
      3515 9598 3529 9598 3529 9644 3546 9644
      3545 9655 3539 9654 3540 9655 3546 9662

$$
130 
WGUS54 KTSA 240539
FFWTSA
OKC061-091-101-107-111-121-145-240930-
/O.EXT.KTSA.FF.W.0001.000000T0000Z-180224T0930Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tulsa OK
1139 PM CST FRI FEB 23 2018

The National Weather Service in Tulsa has extended the

* Flash Flood Warning for...
  Haskell County in southeastern Oklahoma...
  McIntosh County in southeastern Oklahoma...
  Wagoner County in northeastern Oklahoma...
  Central Pittsburg County in southeastern Oklahoma...
  Muskogee County in east central Oklahoma...
  Okmulgee County in northeastern Oklahoma...
  Okfuskee County in east central Oklahoma...

* Until 330 AM CST

* At 1136 PM CST, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. 1 to 2 inches rain have fallen 
  over the past several hours. Flash flooding is already occurring.

* Some locations that may experience flooding include...
  Muskogee...                       Mcalester...
  Okmulgee...                       Wagoner...
  Okemah...                         Eufaula...
  Stigler...                        Okfuskee...
  Coweta...                         Henryetta...
  Fort Gibson...                    Checotah...
  Krebs...                          Haskell...
  Warner...                         Morris...
  Boley...                          Quinton...
  Weleetka...                       Dewar...

Additional rainfall amounts of around 1 inch are possible in the 
warned area.

This includes Interstate 40 in Oklahoma between mile markers 212 and
289.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be especially cautious at night when it is harder to recognize the
dangers of flooding.

&&

LAT...LON 3564 9619 3608 9546 3607 9521 3582 9527
      3581 9513 3553 9513 3541 9498 3520 9492
      3519 9493 3503 9551 3476 9609 3505 9609
      3515 9598 3529 9598 3529 9644 3546 9644
      3545 9655 3539 9654 3540 9655 3546 9662

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 23, 7:46 AM CSTRiver Flood AdvisoryTSAAdair, Cherokee, Delaware36 hr
Feb 23, 7:47 AM CSTRiver Flood AdvisoryTSACherokee36 hr
Feb 23, 8:59 AM CSTRiver Flood AdvisoryTSAPushmataha49 hr
Feb 23, 1:20 PM CSTRiver Flood WarningTSAAdair, Delaware54 hr
Feb 23, 1:20 PM CSTRiver Flood WarningTSAAdair, Cherokee, Delaware56 hr
Feb 23, 1:20 PM CSTRiver Flood WarningTSACherokee3 days
Feb 23, 3:05 PM CSTAreal Flood AdvisoryTSAAdair, Delaware6 hr
Feb 23, 5:38 PM CSTAreal Flood AdvisoryTSACraig, Creek, Mayes, Osage, Rogers, Tulsa and 1 more6 hr

Nearby

Flash Flood Warnings in Oklahoma, 2018Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.