Alert archive / Oklahoma / Flash Flood Warnings in 2017

Flash Flood Warning 20, NWS Norman, OK

April 29, 20175 counties in Oklahoma

NWS Norman, OK issued this flash flood warning at Apr 29, 2017, 9:13 AM CDT for 5 counties in Oklahoma. It was in force for 4 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: Apr 29, 2017, 9:13 AM CDT (14:13 UTC)
Expired: Apr 29, 2017, 1:15 PM CDT
In force: 4 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Blaine County, OK, Caddo County, OK, Canadian County, OK, Kingfisher County, OK, Logan County, OK

The radar

The Norman radar (KTLX), 71 km from the middle of the area, began a volume at 14:15 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, 2.2 hours before the alert went out and 73 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: 8 J/kg
Mixed-layer CIN: -530 J/kg
Mixed-layer LCL: 751 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 155 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

As transmitted.

550 
WGUS54 KOUN 291413
FFWOUN
OKC011-015-017-073-083-291815-
/O.NEW.KOUN.FF.W.0020.170429T1413Z-170429T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
913 AM CDT SAT APR 29 2017

The National Weather Service in Norman has issued a

* Flash Flood Warning for...
  Kingfisher County in central Oklahoma...
  Northwestern Caddo County in southwestern Oklahoma...
  Southeastern Blaine County in northwestern Oklahoma...
  Western Logan County in central Oklahoma...
  Northern Canadian County in central Oklahoma...

* Until 115 PM CDT
  
* At 910 AM CDT, Doppler radar indicated thunderstorms over 
  southwestern Oklahoma moving northeast.  Two to four inches of 
  rain have already fallen earlier this morning and another 1 to 2 
  inches of rainfall may occur with the additional storms through
  late morning. 

* Some locations that will experience flooding include...
  El Reno, Guthrie, Kingfisher, Piedmont, Hinton, Crescent, Geary,
  Okarche, Hydro, Cashion, Calumet, Dover, Eakly, Cedar Valley,
  Mulhall, Lookeba, Cimarron City, Bridgeport, Greenfield and Concho.

LAT...LON 3590 9734 3575 9767 3564 9768 3526 9862
      3554 9862 3593 9830 3612 9737

$$

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 Apr 29, 3:08 AM CDT, 6 hours 5 minutes earlier.

Area forecast discussion, Apr 29, 3:08 AM CDT, 6 hours 5 minutes before

Area Forecast Discussion
National Weather Service Norman OK
308 AM CDT Sat Apr 29 2017

.DISCUSSION...
Busy night and going forecast is in overall good shape. Will make
some tweaks to the weekend grids based on trends, but overall, do
not anticipate many changes.

Widespread showers and thunderstorms will continue to impact much
of Oklahoma and western north Texas through this morning. As the
upper low shifts slowly east today, the surface cold front will
begin to make eastward progress, shifting the heaviest precip into
eastern Oklahoma by late today. Before this occurs there will
remain the potential for additional strong to severe storms
Saturday afternoon, mainly along and east of I-35, along with
potential for flash flooding.

Some areas of light to moderate rain may persist into tonight,
but the heaviest rains should shift east of the area. However,
anticipate maintaining flood watch through 12z Sunday at this
point.

As upper low come out late tonight into Sunday morning, there
could be some light snow mix with the rain or perhaps temporarily
change over to all snow across northwest Oklahoma. Still do not
expect any snow accumulations.

Another cold, blustery day Sunday before milder weather early
next week. Models continue to amplify shortwave for mid-week with
another strong cold front for early May. After Wednesday, expect a
more tranquil period for the end of the week into the following
weekend.

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  61  42  56  41 /  80  50  20   0
Hobart OK         56  39  55  38 /  70  50  20   0
Wichita Falls TX  69  43  63  42 /  70  50  10   0
Gage OK           46  35  47  35 /  70  60  50   0
Ponca City OK     58  43  51  40 /  80  60  50  10
Durant OK         78  49  62  44 /  80  70  10   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch through Sunday morning for OKZ023>032-040>043-
     046>048-050>052.

TX...None.
&&

12/30

Hazardous weather outlook, Apr 29, 8:29 AM CDT, 44 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
829 AM CDT Sat Apr 29 2017

OKZ004>048-050>052-TXZ083>090-301330-
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-
829 AM CDT Sat Apr 29 2017

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 Slight Risk of severe thunderstorms across portions of
central, southern, and eastern Oklahoma this afternoon. The
primary hazard will be large hail.

Location...
The Slight Risk area is mainly east and south of a line from
Cushing to Norman to Waurika.

Timing...
A few strong storms will be possible through this morning across
portions of southwestern Oklahoma. By this afternoon, severe
thunderstorms will be possible across central, southern, and
eastern Oklahoma.

Impacts...
Large hail up to two inches in diameter will be the primary
threat. There is a secondary threat of damaging wind gusts over 60
mph.

Discussion...
Scattered thunderstorms will continue to make there way east
across portions of central and southern Oklahoma, and western
north Texas this morning.

Additional thunderstorm development will be possible by this
afternoon, mainly along and ahead of a cold front that will move
into eastern Oklahoma. Instability and wind shear in the warm
sector ahead of the advancing cold front will be favorable for
severe storms capable of large hail and damaging wind gusts.

.Heavy Rainfall...
Heavy rainfall and flooding will be possible through early tonight.
The heaviest rainfall totals and greatest potential for flooding
are currently expected across portions of central, southern, and
eastern Oklahoma.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel across
the risk area should prepare for severe weather operations through
the late afternoon hours.

.DAYS TWO THROUGH SEVEN...Sunday through Friday...

.Thunderstorms...
Chances for thunderstorms will return Tuesday night through
Wednesday night across parts of Oklahoma and north Texas. Severe
storms are not anticipated.

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, Apr 29, 6:08 AM CDT, 3 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
608 AM CDT SAT APR 29 2017

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

0400 AM     TSTM WND DMG     EAKLY                   35.31N 98.56W
04/29/2017                   CADDO              OK   EMERGENCY MNGR

            POWER POLE DOWN ACROSS HIGHWAY 58 JUST NORTH OF EAKLY.

&&

Local storm report, Apr 29, 6:32 AM CDT, 2 hours 41 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
632 AM CDT SAT APR 29 2017

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

0230 AM     HAIL             4 NE HYDRO              35.59N 98.54W
04/29/2017  E1.75 INCH       BLAINE             OK   PUBLIC

            MPING REPORT

0520 AM     TSTM WND DMG     3 NW OKLAHOMA CITY      35.49N 97.56W
04/29/2017                   OKLAHOMA           OK   BROADCAST MEDIA

            SEVERAL TREES DOWNED ALONG NW 23RD STREET AND SIGN DAMAGE
            AT SHEPHERD MALL. TIME ESTIMATED BY RADAR.

0522 AM     TSTM WND DMG     1 NW OKLAHOMA CITY      35.48N 97.53W
04/29/2017                   OKLAHOMA           OK   PUBLIC

            TREES DOWNS AT NW 10TH AND SHARTEL

0540 AM     HAIL             5 E EDMOND              35.65N 97.38W
04/29/2017  E1.00 INCH       OKLAHOMA           OK   PUBLIC

            MPING REPORT

0600 AM     TSTM WND DMG     WELLSTON                35.69N 97.06W
04/29/2017                   LINCOLN            OK   EMERGENCY MNGR

            SEVERAL TREES AND POWER LINES DOWN IN WELLSTON. TIME
            ESTIMATED BY RADAR.

&&

Local storm report, Apr 29, 7:56 AM CDT, 1 hour 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
756 AM CDT SAT APR 29 2017

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

0120 AM     TSTM WND DMG     3 N KINGFISHER          35.90N 97.93W
04/29/2017                   KINGFISHER         OK   EMERGENCY MNGR

            SEVERAL HIGHWAY SIGNS BLOWN DOWN ALONG US HWY 81. ONE
            MILE EAST ON A SECTION ROAD, 15 POWER POLES SNAPPED OFF
            15-20 FEET ABOVE THE GROUND. A BARN WAS DESTROYED JUST
            EAST OF THE POWER POLES, AND ROOF DAMAGE OCCURRED TO A
            HOUSE NEAR THE SNAPPED POWER POLES. REPORTED BY
            KINGFISHER COUNTY EM.

&&

FM

Local storm report, Apr 29, 8:16 AM CDT, 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
816 AM CDT SAT APR 29 2017

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

0230 AM     HAIL             5 SSW NAVINA            35.73N 97.60W
04/29/2017  E1.75 INCH       LOGAN              OK   PUBLIC

&&

FM

Local storm report, Apr 29, 9:02 AM CDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
902 AM CDT SAT APR 29 2017

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

0352 AM     TSTM WND GST     7 SSW FORT COBB         35.01N 98.49W
04/29/2017  M71 MPH          CADDO              OK   EMERGENCY MNGR

&&

FM

Local storm report, Apr 29, 9:06 AM CDT, 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
906 AM CDT SAT APR 29 2017

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

0900 AM     FLASH FLOOD      WATONGA                 35.85N 98.41W
04/29/2017                   BLAINE             OK   LAW ENFORCEMENT

            WATER SIX TO EIGHT INCHES DEEP ON RESIDENTIAL STREETS.

&&

FM

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 8:43 PM CDT	Special Weather Statement	OUN	Roger Mills	32 min
Apr 28, 10:45 PM CDT	Special Weather Statement	OUN	Lincoln	30 min
Apr 28, 11:36 PM CDT	Special Weather Statement	OUN	Major	24 min
Apr 28, 11:39 PM CDT	Special Weather Statement	OUN	Canadian	36 min
Apr 28, 11:56 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher, Major	39 min
Apr 28, 11:59 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher, Logan	32 min
Apr 29, 12:01 AM CDT	Special Weather Statement	OUN	Washita	29 min
Apr 29, 12:02 AM CDT	Special Weather Statement	OUN	Beckham	28 min
Apr 29, 12:15 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Custer, Washita	45 min
Apr 29, 12:17 AM CDT	Severe Thunderstorm Warning	OUN	Beckham	28 min
Apr 29, 12:24 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	16 min
Apr 29, 12:31 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Greer, Kiowa, Washita	44 min
Apr 29, 12:33 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Kingfisher	42 min
Apr 29, 12:36 AM CDT	Special Weather Statement	OUN	Roger Mills	24 min
Apr 29, 12:59 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian	61 min
Apr 29, 1:05 AM CDT	Special Weather Statement	OUN	Dewey	25 min
Apr 29, 1:12 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Custer, Washita	63 min
Apr 29, 1:15 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	60 min
Apr 29, 1:19 AM CDT	Special Weather Statement	OUN	Kay	26 min
Apr 29, 1:20 AM CDT	Special Weather Statement	OUN	Grant	25 min
Apr 29, 1:20 AM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	40 min
Apr 29, 1:24 AM CDT	Areal Flood Advisory	OUN	Blaine, Caddo, Custer	3 hr
Apr 29, 1:36 AM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	24 min
Apr 29, 1:38 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	37 min
Apr 29, 1:49 AM CDT	Special Weather Statement	OUN	Noble	26 min
Apr 29, 1:58 AM CDT	Severe Thunderstorm Warning	OUN	Greer, Harmon, Jackson	47 min
Apr 29, 1:59 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher, Logan, Oklahoma	61 min
Apr 29, 2:02 AM CDT	Severe Thunderstorm Warning	OUN	Garfield, Logan, Noble	43 min
Apr 29, 2:07 AM CDT	Special Weather Statement	OUN	Greer	23 min
Apr 29, 2:14 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Kingfisher	61 min
Apr 29, 2:16 AM CDT	Flash Flood Warning	OUN	Blaine, Custer, Washita	6 hr
Apr 29, 2:26 AM CDT	Areal Flood Advisory	OUN	Kingfisher	3 hr
Apr 29, 2:38 AM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	67 min
Apr 29, 2:42 AM CDT	Areal Flood Advisory	OUN	Canadian	3 hr
Apr 29, 2:42 AM CDT	Severe Thunderstorm Warning	OUN	Greer, Jackson, Kiowa	48 min
Apr 29, 2:43 AM CDT	Special Weather Statement	OUN	Washita	32 min
Apr 29, 2:55 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma, Payne	80 min
Apr 29, 2:58 AM CDT	Flash Flood Warning	OUN	Blaine, Caddo, Canadian, Kingfisher, Logan	6 hr
Apr 29, 2:58 AM CDT	Special Weather Statement	OUN	Oklahoma	32 min
Apr 29, 3:09 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Kingfisher	37 min
Apr 29, 3:14 AM CDT	Areal Flood Advisory	OUN	Garfield, Noble, Payne	3 hr
Apr 29, 3:16 AM CDT	Special Weather Statement	OUN	Beckham	29 min
Apr 29, 3:22 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Kiowa, Washita	38 min
Apr 29, 3:33 AM CDT	Special Weather Statement	OUN	Logan, Oklahoma	27 min
Apr 29, 3:55 AM CDT	Areal Flood Advisory	OUN	Beckham, Greer, Harmon, Jackson, Kiowa	3 hr
Apr 29, 3:56 AM CDT	Special Weather Statement	OUN	Washita	34 min
Apr 29, 3:58 AM CDT	Severe Thunderstorm Warning	OUN	Caddo, Grady	47 min
Apr 29, 4:04 AM CDT	Special Weather Statement	OUN	Beckham, Greer, Harmon, Jackson	26 min
Apr 29, 4:16 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Custer, Jackson, Kiowa, Washita	44 min
Apr 29, 4:19 AM CDT	Areal Flood Advisory	OUN	Logan, Oklahoma	3 hr
Apr 29, 4:35 AM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady	40 min
Apr 29, 4:40 AM CDT	Special Weather Statement	OUN	Blaine	35 min
Apr 29, 4:47 AM CDT	Special Weather Statement	OUN	Payne	28 min
Apr 29, 4:56 AM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Oklahoma	49 min
Apr 29, 4:58 AM CDT	Special Weather Statement	OUN	Comanche, Cotton	32 min
Apr 29, 5:05 AM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian, Kingfisher	40 min
Apr 29, 5:06 AM CDT	Flash Flood Warning	OUN	Logan, Noble, Payne	6 hr
Apr 29, 5:44 AM CDT	Special Weather Statement	OUN	Jackson	31 min
Apr 29, 5:45 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma	45 min
Apr 29, 6:03 AM CDT	Areal Flood Advisory	OUN	Oklahoma	3 hr
Apr 29, 6:47 AM CDT	Areal Flood Advisory	OUN	Kiowa	3 hr
Apr 29, 7:13 AM CDT	Areal Flood Advisory	OUN	Greer, Harmon, Jackson	3 hr
Apr 29, 7:25 AM CDT	Areal Flood Advisory	OUN	Logan, Oklahoma	3 hr
Apr 29, 7:47 AM CDT	Flash Flood Warning	OUN	Custer, Kiowa, Washita	3 hr
Apr 29, 8:19 AM CDT	River Flood Warning	OUN	Blaine, Caddo, Canadian, Custer	49 hr
Apr 29, 8:24 AM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	17 hr
Apr 29, 8:26 AM CDT	River Flood Warning	OUN	Blaine, Canadian	20 hr
Apr 29, 8:52 AM CDT	Flash Flood Warning	OUN	Beckham, Blaine, Custer, Dewey, Greer, Kiowa and 1 more	4 hr
Apr 29, 9:21 AM CDT	River Flood Warning	OUN	Payne	64 hr
Apr 29, 11:23 AM CDT	River Flood Warning	OUN	Kingfisher	25 hr
Apr 29, 11:29 AM CDT	River Flood Warning	OUN	Kingfisher	15 hr
Apr 29, 11:34 AM CDT	Areal Flood Warning	OUN	Logan, Oklahoma	3 hr
Apr 29, 11:42 AM CDT	Areal Flood Warning	OUN	Logan, Noble, Payne	3 hr
Apr 29, 1:23 PM CDT	Areal Flood Warning	OUN	Blaine, Caddo, Canadian, Custer, Garfield, Kingfisher and 3 more	3 hr
Apr 29, 1:42 PM CDT	Special Weather Statement	OUN	Canadian	33 min
Apr 29, 2:08 PM CDT	River Flood Warning	OUN	Canadian, Cleveland, Grady, McClain	51 hr
Apr 29, 2:08 PM CDT	River Flood Warning	OUN	Cleveland, McClain	55 hr
Apr 29, 2:26 PM CDT	River Flood Warning	OUN	Kingfisher, Logan	45 hr
Apr 29, 2:27 PM CDT	River Flood Warning	OUN	Logan, Payne	40 hr
Apr 29, 2:49 PM CDT	Areal Flood Warning	OUN	Logan, Noble, Payne	3 hr

Nearby

Flash Flood Warnings in Oklahoma, 2017 Every flash flood warning in 2017

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.