Alert archive / Oklahoma / Flash Flood Warnings in 2018

Flash Flood Warning 76, NWS Norman, OK

October 7, 2018Caddo County, Kiowa County, Washita County, Oklahoma

NWS Norman, OK issued this flash flood warning at Oct 7, 2018, 6:12 PM CDT for Caddo County, Kiowa County, Washita County, Oklahoma. It was in force for 93 min. 1 report 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: Oct 7, 2018, 6:12 PM CDT (23:12 UTC)
Expired: Oct 7, 2018, 7:45 PM CDT
In force: 93 min
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Caddo County, OK, Kiowa County, OK, Washita County, OK

The radar

The Altus AFB radar (KFDR), 97 km from the middle of the area, began a volume at 23:11 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

Time	Report	Where	Remark
Oct 7, 7:00 PM CDT	FLASH FLOOD	Carnegie, OK	FLASH FLOODING WITH DEPTHS UP TO 3 FEET ON RESIDENTIAL STREETS.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this flash flood warning; the first came 48 minutes after it went out.

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, 11.2 hours before the alert went out and 114 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 690 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

340 
WGUS54 KOUN 072312
FFWOUN
OKC015-075-149-080045-
/O.NEW.KOUN.FF.W.0076.181007T2312Z-181008T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
612 PM CDT SUN OCT 7 2018

The National Weather Service in Norman has issued a

* Flash Flood Warning for...
  Eastern Washita County in western Oklahoma...
  Western Caddo County in southwestern Oklahoma...
  Northeastern Kiowa County in southwestern Oklahoma...

* Until 745 PM CDT.
  
* At 611 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Flash flooding is occurring or
  is imminent.

* Some locations that will experience flooding include...
  Hinton, Carnegie, Mountain View, Binger, Fort Cobb, Eakly, Gotebo,
  Lookeba, Colony, Bridgeport, Alfalfa, Fort Cobb Reservoir, Albert
  and Cowden.

Additional rainfall amounts of one to three inches are possible in 
the warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3544 9873 3547 9864 3546 9862 3547 9862
      3555 9836 3528 9827 3486 9850 3485 9863
      3486 9882 3484 9883 3484 9884 3512 9889

$$

TL

1 follow-up statement

767 
WGUS74 KOUN 080006
FFSOUN

Flash Flood Statement
National Weather Service Norman OK
706 PM CDT SUN OCT 7 2018

OKC015-075-149-080045-
/O.CON.KOUN.FF.W.0076.000000T0000Z-181008T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Washita OK-Caddo OK-Kiowa OK-
706 PM CDT SUN OCT 7 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 PM CDT FOR
EASTERN WASHITA...WESTERN CADDO AND NORTHEASTERN KIOWA COUNTIES...

At 700 PM CDT, local law enforcement reported flash flooding in 
Carnegie with two to three feet of water flowing through some city 
streets.

Additional rainfall amounts of one to two inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3544 9873 3547 9864 3546 9862 3547 9862
      3555 9836 3528 9827 3486 9850 3485 9863
      3486 9882 3484 9883 3484 9884 3512 9889

$$

TL

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 Oct 7, 4:04 PM CDT, 2 hours 8 minutes earlier.

Area forecast discussion, Oct 7, 4:04 PM CDT, 2 hours 8 minutes before

Area Forecast Discussion
National Weather Service Norman OK
404 PM CDT Sun Oct 7 2018

.DISCUSSION...
A slow moving warm front will continue to lift across Central
Oklahoma, as an upper long wave trough will continue to approach
from the west. Rain showers behind the warm front will remain more
scattered through this evening across southeast into portions of
central Oklahoma. However the meridional flow aloft across
western Oklahoma will maintain widespread showers and isolated
thunderstorms across our west and into northwest Oklahoma through
this evening. There is sufficient instability and marginal shear
for a few of the stronger storms to become severe, especially this
evening as a low level jet increases. A marginal risk is in place
across most of our area, with winds and flooding as the main
hazards.

Meanwhile, moisture from a strengthening tropical cyclone in the
Gulf of Mexico will continue to increase across the southern
plains for the next couple of days. The increasing moisture will
be interacting with the aforementioned upper trough as it starts
digging into our area early this week, maintaining periods of
showers and thunderstorms through at least Tuesday night.
Flooding will also be a hazard, with another 2-3 inches expected
in addition to todays rainfall. A cold front will begin moving
through late Thursday, ending the rain and bringing in much
unseasonably cooler air for the rest of the seven day period.

By Friday, an upper short wave will bring back chances for rain
into Saturday. However at this point, the atmosphere is expected
to remain stable enough to inhibit any thunderstorm development.
The rain chances also remain low, as sufficient moisture return is
in question.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  69  77  67  73 /  70  50  80  90
Hobart OK         68  75  63  71 /  80  80  90  90
Wichita Falls TX  70  80  68  74 /  70  60  80  90
Gage OK           59  72  56  61 /  80  80  80  90
Ponca City OK     67  80  68  73 /  80  50  80  90
Durant OK         70  82  70  78 /  30  30  40  80

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch through Tuesday afternoon for OKZ004>029-033>038-044.

TX...Flood Watch through Tuesday afternoon for TXZ083>089.

&&

25/68

Hazardous weather outlook, Oct 7, 5:04 PM CDT, 1 hour 8 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
504 PM CDT Sun Oct 7 2018

OKZ004>048-050>052-TXZ083>090-082215-
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-
504 PM CDT Sun Oct 7 2018

This hazardous weather outlook is for portions of northern...
western...central...and southern Oklahoma...and western north
Texas.

.DAY ONE...Through Tonight...

.Thunderstorms...
Showers and scattered thunderstorms will continue across portions
of Oklahoma and western north Texas through Monday morning. Some
of the storms could become strong to severe through 10 PM. Damaging
wind gusts up to 70 mph, hail up to the size of ping pong balls,
and heavy rainfall are the main concerns. However, a funnel cloud
and/or brief tornado could also be possible with the strongest
storms.

.Heavy rain...
Heavy rainfall is likely through tonight, which could lead to
flooding and flash flooding in some areas, especially of low
lying and poorly drained areas.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

.Thunderstorms...
Showers and thunderstorms will continue across parts of Oklahoma
and north Texas through Tuesday. Strong to severe storms will be
possible at times, especially during the late afternoon and
evening hours. Large hail and damaging wind gusts will be the
primary hazards with any severe storms. Heavy rainfall associated
with the stronger storms could cause localized flooding.

After a brief break, thunderstorm chances return late this week.

.Heavy Rain...
Widespread moderate to heavy rainfall is likely through Tuesday,
which could lead to flooding and flash flooding, especially of
low lying and poorly drained areas. The prolonged period of
moderate to heavy rains will also create elevated levels on
mainstem rivers.

Get graphics and more details at weather.gov/norman...and follow
our weather forecast office on Twitter and Facebook.

In the hours before

Local storm report, Oct 7, 4:47 PM CDT, 1 hour 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
447 PM CDT SUN OCT 7 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0445 PM     FLASH FLOOD      ALTUS                   34.64N 99.33W
10/07/2018                   JACKSON            OK   EMERGENCY MNGR

            MAJOR STREET FLOODING IN THE CITY OF ALTUS.

&&

JT/FM

Special weather statement, Oct 7, 4:52 PM CDT, 1 hour 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
452 PM CDT SUN OCT 7 2018

OKZ052-072215-
Bryan OK-
452 PM CDT SUN OCT 7 2018

...SIGNIFICANT WEATHER ADVISORY FOR central Bryan County Until 515 PM
CDT....

AT 451 PM CDT, a strong thunderstorm was located 5 miles southeast of
Albany, moving north at 25 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

LAT...LON 3386 9595 3385 9598 3387 9600 3386 9600
      3384 9602 3386 9603 3384 9604 3385 9610
      3383 9610 3384 9615 3382 9615 3381 9618
      3380 9618 3381 9616 3376 9618 3411 9624
      3411 9594 3394 9593
TIME...MOT...LOC 2151Z 179DEG 21KT 3384 9608

..speg.

Local storm report, Oct 7, 5:41 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
541 PM CDT SUN OCT 7 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0540 PM     HAIL             CARNEGIE                35.10N 98.60W
10/07/2018  E1.00 INCH       CADDO              OK   EMERGENCY MNGR

&&

EM

Special weather statement, Oct 7, 5:50 PM CDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
550 PM CDT SUN OCT 7 2018

OKZ012-013-019-020-025-072315-
Garfield OK-Payne OK-Oklahoma OK-Logan OK-Noble OK-
550 PM CDT SUN OCT 7 2018

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Garfield...west
central Payne...northwestern Oklahoma...Logan and southwestern Noble
Counties Until 615 PM CDT....

AT 547 PM CDT, strong thunderstorms were along a line extending from
near Perry to near Edmond, moving northeast at 35 MPH.

HAZARDS INCLUDE...
Hail up to one-half inch diameter...
Wind gusts to 50 MPH...

LAT...LON 3632 9768 3558 9766 3558 9731 3632 9728
TIME...MOT...LOC 2247Z 204DEG 29KT 3623 9741 3563 9740

..speg.

Local storm report, Oct 7, 5:53 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
553 PM CDT SUN OCT 7 2018

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0538 PM     TORNADO          2 NW DAVIS              34.50N 97.16W
10/07/2018                   MURRAY             OK   STORM CHASER

&&

EM

Special weather statement, Oct 7, 6:05 PM CDT, 7 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
605 PM CDT SUN OCT 7 2018

OKZ023-038-072330-
Caddo OK-Comanche OK-
605 PM CDT SUN OCT 7 2018

...SIGNIFICANT WEATHER ADVISORY FOR south central Caddo and north
central Comanche Counties Until 630 PM CDT....

AT 602 PM CDT, a strong thunderstorm was located over southeastern
Fort Sill, moving north at 20 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

LAT...LON 3456 9834 3459 9855 3491 9855 3487 9822
TIME...MOT...LOC 2302Z 189DEG 18KT 3465 9844

..speg.

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 6, 7:12 PM CDT	Special Weather Statement	OUN	Carter	33 min
Oct 6, 7:15 PM CDT	Special Weather Statement	OUN	Carter	30 min
Oct 6, 7:29 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Jefferson, Love, Murray	46 min
Oct 6, 7:44 PM CDT	Areal Flood Advisory	OUN	Carter	2 hr
Oct 6, 8:06 PM CDT	River Flood Warning	OUN	Cotton	4 days
Oct 6, 8:08 PM CDT	River Flood Warning	OUN	Jackson, Kiowa, Tillman	5 days
Oct 6, 8:12 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Love, Marshall, Murray, Pontotoc	48 min
Oct 6, 8:40 PM CDT	Special Weather Statement	OUN	Love	35 min
Oct 6, 8:58 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan, Coal, Johnston, Marshall, Murray and 1 more	47 min
Oct 6, 10:01 PM CDT	Areal Flood Advisory	OUN	Bryan, Carter, Coal, Johnston, Love, Marshall and 1 more	119 min
Oct 7, 12:12 AM CDT	Areal Flood Advisory	OUN	Carter, Jefferson, Love	3 hr
Oct 7, 1:00 AM CDT	Areal Flood Advisory	OUN	Carter, Johnston, Love, Marshall, Murray	3 hr
Oct 7, 4:15 AM CDT	Areal Flood Advisory	OUN	Jefferson, Stephens	3 hr
Oct 7, 4:33 AM CDT	Flash Flood Warning	OUN	Carter, Jefferson, Johnston, Love, Marshall, Murray	4 hr
Oct 7, 7:49 AM CDT	Flash Flood Warning	OUN	Cotton	3 hr
Oct 7, 7:56 AM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Jefferson, Stephens	3 hr
Oct 7, 9:00 AM CDT	River Flood Warning	OUN	Bryan	45 hr
Oct 7, 9:47 AM CDT	River Flood Warning	OUN	Cotton, Jefferson, Tillman	6 days
Oct 7, 9:47 AM CDT	River Flood Warning	OUN	Jefferson, Love	4 days
Oct 7, 9:48 AM CDT	River Flood Warning	OUN	Love	8 days
Oct 7, 9:49 AM CDT	River Flood Warning	OUN	Comanche, Cotton	47 hr
Oct 7, 11:07 AM CDT	Areal Flood Advisory	OUN	Greer, Harmon, Jackson	3 hr
Oct 7, 12:45 PM CDT	Areal Flood Advisory	OUN	Beckham, Greer, Jackson, Kiowa, Washita	3 hr
Oct 7, 3:03 PM CDT	Special Weather Statement	OUN	Canadian	27 min
Oct 7, 3:14 PM CDT	Special Weather Statement	OUN	Carter	31 min
Oct 7, 3:17 PM CDT	Special Weather Statement	OUN	Jackson	28 min
Oct 7, 3:33 PM CDT	Special Weather Statement	OUN	Canadian	27 min
Oct 7, 3:34 PM CDT	Special Weather Statement	OUN	Kiowa	26 min
Oct 7, 3:47 PM CDT	River Flood Warning	OUN	Major, Woods, Woodward	4 days
Oct 7, 3:48 PM CDT	River Flood Warning	OUN	Kingfisher, Logan	5 days
Oct 7, 3:49 PM CDT	River Flood Warning	OUN	Dewey, Major, Woodward	5 days
Oct 7, 3:52 PM CDT	Areal Flood Advisory	OUN	Beckham, Greer, Jackson, Kiowa, Tillman, Washita	3 hr
Oct 7, 4:06 PM CDT	Severe Thunderstorm Warning	OUN	Carter	39 min
Oct 7, 4:10 PM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Canadian, Kingfisher, Washita	3 hr
Oct 7, 4:21 PM CDT	Special Weather Statement	OUN	Coal	24 min
Oct 7, 4:27 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Kiowa	48 min
Oct 7, 4:33 PM CDT	Special Weather Statement	OUN	Murray	27 min
Oct 7, 4:43 PM CDT	Flash Flood Warning	OUN	Greer, Jackson, Kiowa	3 hr
Oct 7, 4:46 PM CDT	Severe Thunderstorm Warning	OUN	Carter, Garvin, Murray	44 min
Oct 7, 4:52 PM CDT	Special Weather Statement	OUN	Bryan	23 min
Oct 7, 5:06 PM CDT	Tornado Warning	OUN	Carter, Garvin, Murray	39 min
Oct 7, 5:15 PM CDT	Areal Flood Advisory	OUN	Carter, Garvin, Murray	2 hr
Oct 7, 5:20 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Bryan	40 min
Oct 7, 5:35 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	40 min
Oct 7, 5:50 PM CDT	Special Weather Statement	OUN	Logan	25 min
Oct 7, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Atoka, Coal	36 min
Oct 7, 6:05 PM CDT	Special Weather Statement	OUN	Comanche	25 min
Oct 7, 6:12 PM CDT	Tornado Warning	OUN	Noble	48 min
Oct 7, 6:23 PM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	52 min
Oct 7, 6:25 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	50 min
Oct 7, 6:32 PM CDT	Special Weather Statement	OUN	Hughes	28 min
Oct 7, 6:41 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Kiowa	64 min
Oct 7, 6:43 PM CDT	Areal Flood Advisory	OUN	Greer, Jackson, Kiowa	62 min
Oct 7, 6:53 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	22 min

Nearby

Flash Flood Warnings in Oklahoma, 2018 Every 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.