Alert archive / Oklahoma / Flash Flood Warnings in 2016

Flash Flood Warning 87, NWS Norman, OK

July 9, 2016Coal County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jul 9, 2016, 11:05 AM CDT for Coal County, Oklahoma. It was in force for 115 min. 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 9, 2016, 11:05 AM CDT (16:05 UTC)
Expired: Jul 9, 2016, 1:00 PM CDT
In force: 115 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

County Coal County, OK

The radar

The Norman radar (KTLX), 122 km from the middle of the area, began a volume at 16:06 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 4.1 hours before the alert went out and 122 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: 1428 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1061 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 210 m²/s²
0-3 km storm-relative helicity: 269 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

040 
WGUS54 KOUN 091605
FFWOUN
OKC029-091800-
/O.NEW.KOUN.FF.W.0087.160709T1605Z-160709T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE NORMAN OK
1105 AM CDT SAT JUL 9 2016

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN COAL COUNTY IN SOUTHEASTERN OKLAHOMA...

* UNTIL 100 PM CDT
  
* AT 1103 AM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. UP TO
  THREE INCHES OF RAIN HAVE ALREADY FALLEN BETWEEN CENTRAHOMA AND
  CLARITA. ANOTHER 1 TO PERHAPS TWO INCHES OF RAIN IS POSSIBLE.
  FLASH FLOODING IS OCCURRING OR IS IMMINENT.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  COALGATE...LEHIGH...TUPELO...CENTRAHOMA...CLARITA...
  OLNEY AND PHILLIPS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3445 9648 3463 9648 3466 9622 3444 9618

$$

SIX

1 follow-up statement

064 
WGUS74 KOUN 091754
FFSOUN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1254 PM CDT SAT JUL 9 2016

OKC029-091800-
/O.CON.KOUN.FF.W.0087.000000T0000Z-160709T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COAL OK-
1254 PM CDT SAT JUL 9 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 100 PM CDT FOR
SOUTHWESTERN COAL COUNTY...

THE FLASH FLOOD WARNING FROM SOUTHWESTERN COAL COUNTY WILL BE ALLOWED
TO EXPIRE AT 1 PM.  MOST OF THE HEAVY RAINFALL HAS SHIFTED SOUTH OF
THE WARNED AREA.  SOME POOR DRAINAGE AREAS WILL LIKELY REMAINED FLOODED
THROUGH THE MID TO LATE AFTERNOON. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
COALGATE...TUPELO...LEHIGH...PHILLIPS...CENTRAHOMA...CLARITA AND OLNEY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3445 9648 3463 9648 3466 9622 3444 9618

$$

SIX

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Norman, OK wrote its last area forecast discussion before this flash flood warning went out at Jul 9, 6:32 AM CDT, 4 hours 33 minutes earlier.

Area forecast discussion, Jul 9, 6:32 AM CDT, 4 hours 33 minutes before

Area Forecast Discussion
National Weather Service Norman OK
632 AM CDT SAT JUL 9 2016

.DISCUSSION...
09/12Z TAF discussion follows.

&&

.AVIATION...
VFR conditions expected to prevail. Low confidence in location of
TSRA development later today will preclude mentioning in TAFS.
Will mention tempo -TSRA at KPNC first 2 hours of forecast with
isolated storms near terminal at this typing.

&&

.PREV DISCUSSION... /issued 357 AM CDT SAT JUL 9 2016/

DISCUSSION...
Scattered showers and storms will be possible mainly over areas
near and east of I-35 early this morning ahead of south-central
Oklahoma MCV. Later today, the same general area near and east of
I-35 will be under the influence of weak upper level wave that
will sink south and east over central and eastern Oklahoma.
Confidence not high on location of convection but will lean
toward the TTU WRF solution but perhaps not as aggressive.
Developing MCV near ABI will also play a role later today near and
south of the Red River Valley. We currently do not anticipate
convection through the day today and this evening will be near as
organized or widespread as yesterday.

Even more isolated or non-existent convection Sunday and Monday
before influence of strong Northern/Central Plains trough tries to
push a weak front toward northern Oklahoma. This will allow pops
to increase across northern portions of Oklahoma mid-late week.
Hot and muggy conditions, especially muggy across areas that saw
the recent rains. Current grids have heat indices below advisory
criteria which will be assessed on a daily basis.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  93  74  94  75 /  30  10  10   0
Hobart OK         98  75  99  77 /  20  10  10  10
Wichita Falls TX  98  77  99  77 /  20  20  10   0
Gage OK           95  71  99  76 /  20  10  10  10
Ponca City OK     90  73  93  76 /  30  20  10  10
Durant OK         94  77  94  75 /  40  30  20  10

&&

.OUN Watches/Warnings/Advisories...
OK...None.
TX...None.
&&

10/11

Hazardous weather outlook, Jul 9, 4:58 AM CDT, 6 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE NORMAN OK
458 AM CDT SAT JUL 9 2016

OKZ004>048-050>052-TXZ083>090-101000-
HARPER-WOODS-ALFALFA-GRANT-KAY-ELLIS-WOODWARD-MAJOR-GARFIELD-
NOBLE-ROGER MILLS-DEWEY-CUSTER-BLAINE-KINGFISHER-LOGAN-PAYNE-
BECKHAM-WASHITA-CADDO-CANADIAN-OKLAHOMA-LINCOLN-GRADY-MCCLAIN-
CLEVELAND-POTTAWATOMIE-SEMINOLE-HUGHES-HARMON-GREER-KIOWA-JACKSON-
TILLMAN-COMANCHE-STEPHENS-GARVIN-MURRAY-PONTOTOC-COAL-COTTON-
JEFFERSON-CARTER-JOHNSTON-ATOKA-LOVE-MARSHALL-BRYAN-HARDEMAN-
FOARD-WILBARGER-WICHITA-KNOX-BAYLOR-ARCHER-CLAY-
458 AM CDT SAT JUL 9 2016

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHERN...
WESTERN...CENTRAL...AND SOUTHERN OKLAHOMA...AND WESTERN NORTH
TEXAS.

.DAY ONE...TODAY AND TONIGHT...

.THUNDERSTORMS...
THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON
AND EVENING ACROSS OKLAHOMA AND WESTERN NORTH TEXAS.

ISOLATED THUNDERSTORMS WILL BE POSSIBLE THIS MORNING ACROSS
SOUTHEAST OKLAHOMA. HOWEVER...MORE VIGOROUS THUNDERSTORMS ARE
POSSIBLE THIS AFTERNOON. SOME STORMS MAY BE STRONG TO
SEVERE...WITH 60 TO 70 MPH WINDS...AND QUARTER TO HALF DOLLAR SIZE
HAIL. HEAVY RAIN LEADING TO LOCALIZED FLOODING WILL ALSO BE A
HAZARD.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
STORM SPOTTER GROUPS AND EMERGENCY MANAGEMENT PERSONNEL SHOULD
PREPARE FOR SEVERE WEATHER OPERATIONS THIS AFTERNOON AND EVENING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...

.THUNDERSTORMS...
THUNDERSTORMS WILL BE POSSIBLE EVERY DAY FROM SUNDAY THROUGH
FRIDAY. HOWEVER...NO ORGANIZED SEVERE WEATHER IS EXPECTED AT THIS
TIME.

GET GRAPHICS AND MORE DETAILS AT WEATHER.GOV/NORMAN...AND FOLLOW
OUR WEATHER FORECAST OFFICE ON TWITTER AND FACEBOOK.

MAHALE

In the hours before

Special weather statement, Jul 9, 9:41 AM CDT, 1 hour 24 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
941 AM CDT SAT JUL 9 2016

OKZ043-091515-
COAL OK-
941 AM CDT SAT JUL 9 2016

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL COAL COUNTY UNTIL 1015 AM
CDT...

AT 940 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR
CLARITA...MOVING NORTHEAST AT 15 MPH.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...

LAT...LON 3445 9647 3467 9651 3468 9646 3468 9641
      3469 9640 3473 9625 3453 9610
TIME...MOT...LOC 1440Z 245DEG 11KT 3454 9640

SIX

Special weather statement, Jul 9, 10:25 AM CDT, 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1025 AM CDT SAT JUL 9 2016

OKZ043-091600-
COAL OK-
1025 AM CDT SAT JUL 9 2016

...SIGNIFICANT WEATHER ADVISORY FOR COAL COUNTY UNTIL 1100 AM CDT...

AT 1022 AM CDT...A STRONG THUNDERSTORM WAS LOCATED NEAR CENTRAHOMA...
MOVING EAST AT 15 MPH.

HAZARDS INCLUDE...
HAIL UP TO THE SIZE OF NICKELS...
WIND GUSTS TO 40 MPH...

LAT...LON 3450 9614 3448 9615 3442 9644 3463 9650
      3476 9611 3458 9609 3451 9609
TIME...MOT...LOC 1522Z 254DEG 15KT 3459 9633

SIX

Special weather statement, Jul 9, 11:00 AM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
1100 AM CDT SAT JUL 9 2016

OKZ043-047-048-091630-
ATOKA OK-COAL OK-JOHNSTON OK-
1100 AM CDT SAT JUL 9 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN ATOKA...SOUTHERN
COAL AND SOUTHEASTERN JOHNSTON COUNTIES UNTIL 1130 AM CDT...

AT 1057 AM CDT...STRONG THUNDERSTORMS WERE ALONG A LINE EXTENDING
FROM NEAR CENTRAHOMA TO NEAR WAPANUCKA TO NEAR MILBURN...MOVING EAST
AT 10 MPH. THE STRONGEST STORM WAS LOCATED NEAR CENTRAHOMA WHERE
ALMOST THREE INCHES OF RAIN HAVE FALLEN SINCE 9 AM.

HAZARDS INCLUDE...
HAIL UP TO ONE-HALF INCH DIAMETER...
WIND GUSTS TO 40 MPH...
FLOODING IN AREAS OF POOR DRAINAGE...

LAT...LON 3443 9617 3417 9634 3415 9656 3414 9660
      3414 9661 3415 9661 3416 9662 3416 9664
      3432 9651 3462 9642 3471 9610
TIME...MOT...LOC 1557Z 249DEG 10KT 3458 9637 3435 9644 3422 9654

SIX

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 8, 7:07 PM CDT	Special Weather Statement	OUN	Jackson	23 min
Jul 8, 7:14 PM CDT	Special Weather Statement	OUN	Pottawatomie, Seminole	31 min
Jul 8, 7:16 PM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	44 min
Jul 8, 7:19 PM CDT	Severe Thunderstorm Warning	OUN	Pottawatomie, Seminole	26 min
Jul 8, 7:35 PM CDT	Special Weather Statement	OUN	Grady	25 min
Jul 8, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	Hughes, Pontotoc, Pottawatomie, Seminole	32 min
Jul 8, 7:58 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	47 min
Jul 8, 8:00 PM CDT	Special Weather Statement	OUN	Cleveland	30 min
Jul 8, 8:01 PM CDT	Special Weather Statement	OUN	Grady	29 min
Jul 8, 8:16 PM CDT	Special Weather Statement	OUN	Pontotoc	29 min
Jul 8, 8:32 PM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Kiowa, Tillman	118 min
Jul 8, 8:37 PM CDT	Special Weather Statement	OUN	Hughes	23 min
Jul 9, 9:41 AM CDT	Special Weather Statement	OUN	Coal	34 min
Jul 9, 10:21 AM CDT	Areal Flood Advisory	OUN	Atoka, Bryan, Coal, Johnston, Marshall	114 min
Jul 9, 10:25 AM CDT	Special Weather Statement	OUN	Coal	35 min
Jul 9, 11:00 AM CDT	Special Weather Statement	OUN	Coal	30 min
Jul 9, 12:40 PM CDT	Flash Flood Warning	OUN	Atoka, Bryan, Coal, Johnston, Marshall	3 hr
Jul 9, 1:03 PM CDT	Special Weather Statement	OUN	Bryan	27 min
Jul 9, 1:12 PM CDT	Special Weather Statement	OUN	Carter	33 min
Jul 9, 1:48 PM CDT	Special Weather Statement	OUN	Love	27 min
Jul 9, 2:10 PM CDT	Special Weather Statement	OUN	Love	35 min
Jul 9, 2:23 PM CDT	Areal Flood Advisory	OUN	Love	112 min
Jul 9, 2:51 PM CDT	Flash Flood Warning	OUN	Love	114 min
Jul 9, 2:58 PM CDT	Special Weather Statement	OUN	Love	17 min
Jul 9, 3:11 PM CDT	Special Weather Statement	OUN	Jefferson	34 min
Jul 9, 5:46 PM CDT	Special Weather Statement	OUN	Alfalfa	29 min
Jul 9, 6:00 PM CDT	Special Weather Statement	OUN	Caddo	30 min
Jul 9, 6:03 PM CDT	Special Weather Statement	OUN	Blaine	27 min
Jul 9, 6:12 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa	48 min
Jul 9, 6:49 PM CDT	Areal Flood Advisory	OUN	Alfalfa	3 hr
Jul 9, 6:51 PM CDT	Special Weather Statement	OUN	Blaine	24 min
Jul 9, 6:55 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Woods	50 min

Nearby

Flash Flood Warnings in Oklahoma, 2016 Every flash flood warning in 2016

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.