Alert archive / Oklahoma / Flash Flood Warnings in 2017

Flash Flood Warning 70, NWS Norman, OK

July 5, 2017Atoka County, Coal County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jul 5, 2017, 4:07 AM CDT for Atoka County, Coal County, Oklahoma. It was in force for 6 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: Jul 5, 2017, 4:07 AM CDT (09:07 UTC)
Expired: Jul 5, 2017, 10:00 AM CDT
In force: 6 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Atoka County, OK, Coal County, OK

The radar

The Norman radar (KTLX), 157 km from the middle of the area, began a volume at 09:09 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 00:00Z, 9.1 hours before the alert went out and 159 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: 172 J/kg
Mixed-layer CIN: -298 J/kg
Mixed-layer LCL: 1704 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

864 
WGUS54 KOUN 050907
FFWOUN
OKC005-029-051200-
/O.NEW.KOUN.FF.W.0070.170705T0907Z-170705T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
407 AM CDT WED JUL 5 2017

The National Weather Service in Norman has issued a

* Flash Flood Warning for...
  Southeastern Coal County in southeastern Oklahoma...
  Atoka County in southeastern Oklahoma...

* Until 700 AM CDT
  
* At 406 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. One to three inches of rain 
  have fallen since 1 am east of Coalgate and northeast of Atoka. 
  Flash flooding is occurring or is imminent.

* Some locations that will experience flooding include...
  Atoka, Coalgate, Stringtown, Lehigh, Lane, Wardville, Daisy,
  Phillips, Atoka Reservoir, Chockie, McGee Creek Lake, Redden and
  Darwin.

Additional rainfall amounts of one half to three are likely in the 
warned area now through 7 am this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3451 9578 3416 9578 3415 9598 3432 9614
      3443 9629 3467 9621 3468 9589 3459 9588
      3459 9567 3451 9567

$$

MBS

1 follow-up statement

704 
WGUS54 KOUN 051109
FFWOUN
OKC005-029-051500-
/O.EXT.KOUN.FF.W.0070.000000T0000Z-170705T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
609 AM CDT WED JUL 5 2017

The National Weather Service in Norman has extended the

* Flash Flood Warning for...
  Southeastern Coal County in southeastern Oklahoma...
  Atoka County in southeastern Oklahoma...

* Until 1000 AM CDT
  
* At 607 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. One to seven inches of rain 
  have fallen with the heaviest rainfall in northeastern Atoka 
  county between Stringtown and Redden. Flash flooding is already 
  occurring.

* Some locations that will experience flooding include...
  Atoka, Coalgate, Stringtown, Lehigh, Lane, Wardville, Daisy,
  Phillips, Atoka Reservoir, Chockie, McGee Creek Lake, Redden and
  Darwin.

Additional rainfall amounts between 0.25" and 1" can be expected in 
the warned area before rain ends by 10 am this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3451 9578 3416 9578 3415 9598 3432 9614
      3443 9629 3467 9621 3468 9589 3459 9588
      3459 9567 3451 9567

$$

MBS

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 5, 1:59 AM CDT, 2 hours 8 minutes earlier.

Area forecast discussion, Jul 5, 1:59 AM CDT, 2 hours 8 minutes before

Area Forecast Discussion
National Weather Service Norman OK
159 AM CDT Wed Jul 5 2017

.DISCUSSION...
Heavy rainfall/flooding and severe thunderstorm potential mainly
over southern Oklahoma and western north Texas early this morning
are the main concerns.

Early this morning (before 9 am), thunderstorms are expected grow
upscale and become clusters and/or lines as they move
south/southeast across southern Oklahoma and western north Texas.
Very heavy rainfall with rainfall rates 2-5"/hr with some flash
flooding appears to be the main hazard with storms (precipitable
water values 1.5-2.1" which is in the 75-99th percentile for this
time of year). Some severe storms with damaging winds of 60-70
mph as the main hazard are expected as well, especially as storms
develop low level cold pools. Hail potential is lower due to high
wet bulb zero heights (generally 12-14 kft AGL), though a few
reports of quarter or half dollar size hail may occur as well.

Increased rain chances early this morning south a Cheyenne to
Chickasha to Atoka line to account for storms. North of this line,
including Oklahoma City, chances for storms appear to be quite low
where the air is slightly drier and more stable.

After 9 am today, rain/storm chances appear to be quite low due
to increasing mid level heights and resulting weak subsidence.
Kept 20% chances south of a Cheyenne to Chickasha to Seminole line
where slightly deeper moisture is forecast (precipitable water
values generally 1.3-2" according to the latest RAP13 model runs).
Think storms early this morning will stabilize the air
considerably across southern Oklahoma and north Texas. If a few
storms could form this afternoon and early this evening, locally
heavy rainfall and gusty winds would be possible. Model guidance
highs seemed reasonable with highs mainly in the upper 80s and
lower 90s today with some afternoon sunshine.

Tonight, rain chances will remain very low. Still kept 20% for
rain/storms over southern Oklahoma and north Texas where deeper
moisture may linger, though increased capping may not allow for
storm formation. Clearing skies and abundant low level moisture
may allow for patchy fog formation. Did not mention fog due to
low confidence of occurrence.

Thursday and Friday, appear to be rainfree, humid, and hotter
across Oklahoma and north Texas. There is a very small chance,
too low to mention, that a weakening complex of storms moves into
northern Oklahoma from the north on Friday. Heat indices may
approach 105 degrees if surface dewpoints stay up in the mid to
upper 70s, which is possible as latest models may be
underestimating surface dewpoints.

Saturday through Tuesday, hot and mainly rainfree conditions are
expected due some mid/upper level ridging. Most models have been
depicting lower rain/storm chances Saturday and Sunday.

MBS

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  88  68  92  69 /  30  10   0   0
Hobart OK         90  68  94  70 /  30  10   0   0
Wichita Falls TX  88  70  93  72 /  50  20  10   0
Gage OK           90  65  95  67 /  10   0   0   0
Ponca City OK     88  65  92  70 /  10  10   0   0
Durant OK         87  70  92  71 /  60  20  10   0

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...None.
TX...None.
&&

23/17

Hazardous weather outlook, Jul 5, 2:26 AM CDT, 1 hour 41 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
226 AM CDT Wed Jul 5 2017

OKZ004>048-050>052-TXZ083>090-060730-
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-
226 AM CDT Wed Jul 5 2017

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

.DAY ONE...Now through 9 am This Morning...

.Thunderstorms...
There is a Marginal Risk of severe thunderstorms across southern
Oklahoma and western north Texas before 9 am this morning,
generally south of a line from Erick to Lawton to Pauls Valley to
Coalgate. Wind gusts of 70 mph, hail up to the size of hail to
half dollars, and torrential rainfall are the primary hazards.

.Heavy rainfall...
Heavy rainfall may lead to areas of flooding across southern
Oklahoma and western north Texas early this morning.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...

.Thunderstorms...
After 9 am this morning, chances for severe thunderstorms appear
to be very low through early next week.

Low chances for thunderstorms are forecast Wednesday afternoon
and night across southern Oklahoma and western north Texas.

Thunderstorms may be possible Saturday and Sunday across mainly
northeastern Oklahoma, then again Monday and Tuesday across
southeastern Oklahoma.

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

MBS

In the hours before

Local storm report, Jul 5, 2:53 AM CDT, 1 hour 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
253 AM CDT WED JUL 05 2017

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

0252 AM     TSTM WND GST     WICHITA FALLS           33.89N 98.51W
07/05/2017  E60 MPH          WICHITA            TX   BROADCAST MEDIA

            BRANCHES OFF TREES.

&&

CMS

Local storm report, Jul 5, 3:06 AM CDT, 1 hour 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
306 AM CDT WED JUL 05 2017

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

0259 AM     TSTM WND GST     4 N WICHITA FALLS       33.95N 98.51W
07/05/2017  M59 MPH          WICHITA            TX   ASOS

&&

CMS

Local storm report, Jul 5, 3:17 AM CDT, 50 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
317 AM CDT WED JUL 05 2017

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

0312 AM     TSTM WND GST     4 N WICHITA FALLS       33.95N 98.51W
07/05/2017  M58 MPH          WICHITA            TX   ASOS

&&

CMS

Special weather statement, Jul 5, 3:45 AM CDT, 22 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
345 AM CDT WED JUL 5 2017

OKZ045-046-050-TXZ090-050930-
Love OK-Carter OK-Jefferson OK-Clay TX-
345 AM CDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Love...southwestern
Carter...Jefferson and east central Clay Counties Until 430 AM CDT...

AT 342 AM CDT, strong thunderstorms were along a line extending from
6 miles east of Addington to near Grady to 5 miles west of Nocona,
moving east at 30 MPH.

HAZARDS INCLUDE...
Wind gusts to 50 MPH...
Minor flooding in areas of poor drainage...

Locations impacted include...
Waurika, Healdton, Wilson, Ringling, Ryan, Terral, Hastings,
Addington, Leon, Sugden, southern Waurika Lake, Rubottom, Grady,
Oscar, Cornish, Courtney and Petersburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3384 9746 3389 9745 3391 9747 3392 9750
      3390 9759 3395 9759 3399 9767 3394 9773
      3394 9776 3391 9777 3392 9778 3389 9778
      3390 9780 3386 9783 3385 9787 3389 9798
      3429 9814 3429 9756 3401 9733 3382 9743
TIME...MOT...LOC 0842Z 267DEG 25KT 3425 9786 3402 9768 3380 9782

MAHALE

Special weather statement, Jul 5, 3:56 AM CDT, 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
356 AM CDT WED JUL 5 2017

OKZ041-047-050930-
Johnston OK-Murray OK-
356 AM CDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR northwestern Johnston and
southeastern Murray Counties Until 430 AM CDT...

AT 353 AM CDT, a strong thunderstorm was located near Lake Of The
Arbuckles, moving east at 20 MPH.

HAZARDS INCLUDE...
Wind gusts to 40 MPH...
Minor flooding in areas of poor drainage...

Locations impacted include...
Mill Creek, Dougherty and Lake Of The Arbuckles.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3438 9708 3444 9709 3451 9683 3451 9682
      3437 9678
TIME...MOT...LOC 0853Z 259DEG 16KT 3443 9699

MAHALE

Special weather statement, Jul 5, 3:59 AM CDT, 8 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
359 AM CDT WED JUL 5 2017

OKZ041-046-047-051-050930-
Carter OK-Johnston OK-Marshall OK-Murray OK-
359 AM CDT WED JUL 5 2017

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Carter...
southwestern Johnston...northwestern Marshall and southeastern Murray
Counties Until 430 AM CDT...

AT 356 AM CDT, a strong thunderstorm was located 4 miles southwest of
Gene Autry, moving east at 20 MPH.

HAZARDS INCLUDE...
Wind gusts to 40 MPH...
Minor flooding in areas of poor drainage...

Locations impacted include...
Ardmore, Lone Grove, Dickson, Mannsville, Springer, Gene Autry and
Russett.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Monitor the weather situation closely and be alert for threatening
weather conditions.

&&

LAT...LON 3415 9725 3431 9725 3439 9683 3426 9677
      3414 9678
TIME...MOT...LOC 0856Z 259DEG 16KT 3424 9708

MAHALE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 4, 11:35 PM CDT	Special Weather Statement	OUN	Comanche	25 min
Jul 5, 12:02 AM CDT	Special Weather Statement	OUN	Comanche	43 min
Jul 5, 12:08 AM CDT	Areal Flood Advisory	OUN	Comanche, Greer, Jackson, Kiowa	3 hr
Jul 5, 12:17 AM CDT	Special Weather Statement	OUN	Comanche	28 min
Jul 5, 12:28 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Grady, Stephens	47 min
Jul 5, 12:42 AM CDT	Special Weather Statement	OUN	Jackson	33 min
Jul 5, 12:50 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Kiowa, Tillman	40 min
Jul 5, 1:12 AM CDT	Special Weather Statement	OUN	Washita	33 min
Jul 5, 1:16 AM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	44 min
Jul 5, 1:19 AM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Jackson, Kiowa, Tillman	3 hr
Jul 5, 1:22 AM CDT	Severe Thunderstorm Warning	OUN	Grady	40 min
Jul 5, 1:25 AM CDT	Special Weather Statement	OUN	Jackson	35 min
Jul 5, 1:27 AM CDT	Severe Thunderstorm Warning	OUN	Tillman	48 min
Jul 5, 1:31 AM CDT	Special Weather Statement	OUN	Cotton	29 min
Jul 5, 1:40 AM CDT	Severe Thunderstorm Warning	OUN	Jackson, Tillman	50 min
Jul 5, 1:49 AM CDT	Areal Flood Advisory	OUN	Jackson, Tillman	3 hr
Jul 5, 1:51 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	39 min
Jul 5, 2:00 AM CDT	Special Weather Statement	OUN	Garvin	30 min
Jul 5, 2:07 AM CDT	Areal Flood Advisory	OUN	Comanche, Cotton, Grady, Jefferson, Stephens	3 hr
Jul 5, 2:11 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jefferson, Stephens	49 min
Jul 5, 2:15 AM CDT	Severe Thunderstorm Warning	OUN	Cotton, Jackson, Tillman	45 min
Jul 5, 2:28 AM CDT	Special Weather Statement	OUN	Garvin, Stephens	32 min
Jul 5, 2:44 AM CDT	Special Weather Statement	OUN	Coal	31 min
Jul 5, 2:55 AM CDT	Severe Thunderstorm Warning	OUN	Jefferson	50 min
Jul 5, 2:56 AM CDT	Areal Flood Advisory	OUN	Coal, Johnston, Pontotoc	3 hr
Jul 5, 3:01 AM CDT	Areal Flood Advisory	OUN	Cotton, Tillman	3 hr
Jul 5, 3:13 AM CDT	Flash Flood Warning	OUN	Cotton, Jefferson, Stephens	6 hr
Jul 5, 3:21 AM CDT	Areal Flood Advisory	OUN	Custer, Washita	3 hr
Jul 5, 3:45 AM CDT	Special Weather Statement	OUN	Jefferson	45 min
Jul 5, 3:56 AM CDT	Special Weather Statement	OUN	Murray	34 min
Jul 5, 3:59 AM CDT	Special Weather Statement	OUN	Murray	31 min
Jul 5, 4:01 AM CDT	Areal Flood Advisory	OUN	Garvin, Murray, Pontotoc	3 hr
Jul 5, 4:14 AM CDT	Special Weather Statement	OUN	Carter, Love	46 min
Jul 5, 4:27 AM CDT	Areal Flood Advisory	OUN	Carter, Coal, Johnston, Marshall, Murray, Pontotoc	3 hr
Jul 5, 5:05 AM CDT	Special Weather Statement	OUN	Atoka, Bryan, Coal, Johnston, Marshall	55 min
Jul 5, 5:33 AM CDT	Areal Flood Advisory	OUN	Atoka, Bryan, Johnston, Marshall	3 hr
Jul 5, 9:49 AM CDT	Areal Flood Warning	OUN	Atoka, Coal	6 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.