Alert archive / Oklahoma / Flash Flood Warnings in 2019

Flash Flood Warning 4, NWS Norman, OK

April 30, 2019Comanche County, Cotton County, Stephens County, Oklahoma

NWS Norman, OK issued this flash flood warning at Apr 30, 2019, 5:26 PM CDT for Comanche County, Cotton County, Stephens County, Oklahoma. It was in force for 2 hr. 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: Apr 30, 2019, 5:26 PM CDT (22:26 UTC)
Expired: Apr 30, 2019, 7:30 PM CDT
In force: 2 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Comanche County, OK, Cotton County, OK, Stephens County, OK

The radar

The Altus AFB radar (KFDR), 62 km from the middle of the area, began a volume at 22:26 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
Apr 30, 6:10 PM CDT	FLASH FLOOD	5 E Geronimo, OK	FLOOD WATERS ACROSS 75TH AND NEW HOPE.

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 44 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, 10.4 hours before the alert went out and 120 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: 1242 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 541 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 153 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.7

Open this sounding in Storm Lab

The text

As transmitted.

776 
WGUS54 KOUN 302226
FFWOUN
OKC031-033-137-010030-
/O.NEW.KOUN.FF.W.0004.190430T2226Z-190501T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Norman OK
526 PM CDT Tue Apr 30 2019

The National Weather Service in Norman has issued a

* Flash Flood Warning for...
  Southeastern Comanche County in southwestern Oklahoma...
  Northwestern Stephens County in southern Oklahoma...
  Northern Cotton County in southwestern Oklahoma...

* Until 730 PM CDT.
  
* At 525 PM CDT, Doppler radar indicated thunderstorms producing
  heavy rain across the warned area. Up to two inches of rain have
  already fallen. Flash flooding is occurring or is imminent.

* Some locations that will experience flooding include...
  Duncan, Walters, Geronimo, Cookietown, Central High and Hulen. 

Additional rainfall amounts of 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 3419 9854 3435 9860 3471 9819 3468 9808
      3450 9789

$$

1 follow-up statement

385 
WGUS74 KOUN 302246
FFSOUN

Flash Flood Statement
National Weather Service Norman OK
546 PM CDT Tue Apr 30 2019

OKC031-033-137-010030-
/O.CON.KOUN.FF.W.0004.000000T0000Z-190501T0030Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Comanche OK-Stephens OK-Cotton OK-
546 PM CDT Tue Apr 30 2019

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM CDT FOR
SOUTHEASTERN COMANCHE...NORTHWESTERN STEPHENS AND NORTHERN COTTON
COUNTIES...

At 545 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain over the warned area. Up to two 
inches of rain have already fallen in parts of the area. Flash 
flooding is expected to begin shortly.

Some locations that will experience flooding include...
Duncan, Walters, Geronimo, Cookietown, Central High and Hulen. 

Additional rainfall amounts of around 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 3419 9854 3435 9860 3471 9819 3468 9808
      3450 9789

$$

Ware

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 30, 2:36 PM CDT, 2 hours 50 minutes earlier.

Area forecast discussion, Apr 30, 2:36 PM CDT, 2 hours 50 minutes before

Area Forecast Discussion
National Weather Service Norman OK
236 PM CDT Tue Apr 30 2019

.DISCUSSION...
Active weather going on this afternoon, so will keep this brief.
Scattered to numerous thunderstorms should continue into early
evening. Expectation is for convection to consolidate along the
front the evening and then move eastward from there. Severe hail,
winds, and a tornado or two are all threats.

With ample moisture in place, convection may continue overnight
over southeast Oklahoma as the shortwave makes its way out. Will
keep the flood watch going with some slight adjustment (bringing
it south to the border).

General trend is for the models to retreat the front Wednesday
afternoon into northern Oklahoma (with the exception of the NAM).
Models suggest some convection may form in southeast Oklahoma as a
vorticity maximum passes over that area of abundant moisture
tomorrow evening. At the same time a cold front will surge south
from Kansas bringing precipitation chances with it overnight into
Thursday morning.

Synoptic pattern remains active into next week, though details
are a bit fuzzy.

Day

&&

.PRELIMINARY POINT TEMPS/POPS...
Oklahoma City OK  60  79  59  69 /  60  30  40  30
Hobart OK         57  81  57  66 /  30  20  30  10
Wichita Falls TX  64  82  62  75 /  50  40  20  30
Gage OK           51  79  49  65 /  20  10  30  10
Ponca City OK     57  75  58  68 /  50  20  60  30
Durant OK         66  79  63  77 /  80  50  60  60

&&

.OUN WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch until 7 PM CDT this evening for OKZ006>008-011>013-
     015>020-022>030-033>038.

     Flood Watch from 7 PM CDT this evening through Wednesday morning
     for OKZ045-050>052.

     Flood Watch through Wednesday morning for OKZ031-032-039>043-
     046>048.

TX...Flood Watch until 7 PM CDT this evening for TXZ083>085.

     Flood Watch from 7 PM CDT this evening through Wednesday morning
     for TXZ090.

&&

30/14

Hazardous weather outlook, Apr 30, 12:27 PM CDT, 4 hours 59 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Norman OK
1227 PM CDT Tue Apr 30 2019

OKZ004>048-050>052-TXZ083>090-011730-
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-
1227 PM CDT Tue Apr 30 2019

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

.DAY ONE...Through Tonight...

.Thunderstorms...
There is an enhanced risk of severe thunderstorms today across
the eastern half of Oklahoma. A slight risk covers the western
half of Oklahoma and western north Texas.

Location...
The enhanced risk area is generally along and east of a Stillwater
to Oklahoma City and Duncan line. The slight risk area is
generally west of the enhanced risk to the Oklahoma and Texas
state line.

Timing...
The most likely time for severe storms will be from now through
Midnight.

Impacts...
Hail up to the size of golf balls.
Damaging winds of 60 to 70 mph.
A few tornadoes possible.
Excessive rainfall with flooding possible.

Discussion...
Scattered to numerous storms are expected to continue through the
afternoon moving east through the evening. Large hail and damaging
wind gusts will be the main threats. For storms that form along or
south of the cold front, there is also a risk for a tornado or two
developing.

.SPOTTER AND EMERGENCY MANAGEMENT STATEMENT...
Storm spotter groups and emergency management personnel across
the area should prepare for potential severe weather operations.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday...
There is a slight risk of severe thunderstorms on Wednesday mainly
across the eastern half of Oklahoma. A marginal risk covers the
western half of Oklahoma and western north Texas. The most likely
time for severe weather will be during the afternoon and evening.

Thunderstorms remain in the forecast for Thursday through Monday.

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

In the hours before

Special weather statement, Apr 30, 4:41 PM CDT, 45 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
441 PM CDT Tue Apr 30 2019

TXZ086-089-090-302215-
Clay TX-Wichita TX-Archer TX-
441 PM CDT Tue Apr 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR west central Clay...southeastern
Wichita and northeastern Archer Counties Until 515 PM CDT...

AT 440 PM CDT, a strong thunderstorm was located near Scotland,
moving northeast at 25 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Storm intensity is increasing and severe weather may develop rapidly.
Stay alert and listen for warnings.

&&

LAT...LON 3361 9854 3372 9860 3399 9833 3379 9811
TIME...MOT...LOC 2140Z 227DEG 22KT 3370 9847

BRB

Special weather statement, Apr 30, 4:51 PM CDT, 35 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
451 PM CDT Tue Apr 30 2019

OKZ027-302215-
Grady OK-
451 PM CDT Tue Apr 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR southern Grady County Until 515
PM CDT...

AT 450 PM CDT, a strong thunderstorm was located near Rush Springs,
moving northeast at 40 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3480 9809 3483 9809 3511 9789 3501 9768
      3470 9792
TIME...MOT...LOC 2150Z 216DEG 35KT 3482 9796

30

Local storm report, Apr 30, 4:55 PM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
455 PM CDT TUE APR 30 2019

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

0448 PM     FLASH FLOOD      5 SW EDMOND             35.61N 97.55W
04/30/2019                   OKLAHOMA           OK   PUBLIC

            FLOODING REPORTED AT PENNSYLVANIA AND MEMORIAL RD.

&&

JT

Local storm report, Apr 30, 5:01 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
501 PM CDT TUE APR 30 2019

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

0459 PM     FLASH FLOOD      N OKLAHOMA CITY         35.47N 97.51W
04/30/2019                   OKLAHOMA           OK   EMERGENCY MNGR

            STREET FLOODING REPORTED IN NORTHSIDE OF OKC FROM RENO TO
            NW 133 AND FROM N. WESTERN TO N. COUNCIL.

&&

JT

Special weather statement, Apr 30, 5:10 PM CDT, 16 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Norman OK
510 PM CDT Tue Apr 30 2019

OKZ037-TXZ085-086-088-302245-
Tillman OK-Wichita TX-Wilbarger TX-Baylor TX-
510 PM CDT Tue Apr 30 2019

...SIGNIFICANT WEATHER ADVISORY FOR southeastern Tillman...
northwestern Wichita...southern Wilbarger and northwestern Baylor
Counties Until 545 PM CDT...

AT 509 PM CDT, strong thunderstorms were along a line extending from
near Electra to 12 miles northwest of Lake Kemp, moving northeast at
20 MPH.

HAZARDS INCLUDE...
Hail up to the size of nickels...
Wind gusts to 50 MPH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Storm intensity is increasing and severe weather may develop rapidly.
Stay alert and listen for warnings.

&&

LAT...LON 3381 9948 3401 9939 3433 9862 3400 9877
      3375 9948
TIME...MOT...LOC 2209Z 215DEG 16KT 3405 9888 3383 9939

BRB

Local storm report, Apr 30, 5:13 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
513 PM CDT TUE APR 30 2019

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

0454 PM     HAIL             GERONIMO                34.48N 98.38W
04/30/2019  E0.88 INCH       COMANCHE           OK   COUNTY OFFICIAL

&&

JT

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 30, 12:12 AM CDT	Special Weather Statement	OUN	Blaine	33 min
Apr 30, 3:32 AM CDT	Special Weather Statement	OUN	Garfield	28 min
Apr 30, 5:07 AM CDT	Areal Flood Advisory	OUN	Garfield	113 min
Apr 30, 9:13 AM CDT	Special Weather Statement	OUN	Ellis, Harper	32 min
Apr 30, 9:35 AM CDT	Special Weather Statement	OUN	Oklahoma	25 min
Apr 30, 10:02 AM CDT	Areal Flood Advisory	OUN	Logan, Oklahoma	3 hr
Apr 30, 10:02 AM CDT	Special Weather Statement	OUN	Cleveland	13 min
Apr 30, 10:04 AM CDT	Special Weather Statement	OUN	Grady	26 min
Apr 30, 10:07 AM CDT	Special Weather Statement	OUN	Oklahoma	23 min
Apr 30, 10:12 AM CDT	Special Weather Statement	OUN	Cleveland	33 min
Apr 30, 10:27 AM CDT	Special Weather Statement	OUN	Lincoln	33 min
Apr 30, 10:32 AM CDT	Special Weather Statement	OUN	Cleveland	28 min
Apr 30, 10:35 AM CDT	Special Weather Statement	OUN	Oklahoma, Payne	25 min
Apr 30, 10:54 AM CDT	Severe Thunderstorm Warning	OUN	Lincoln, Logan, Oklahoma	51 min
Apr 30, 10:56 AM CDT	Severe Thunderstorm Warning	OUN	Beckham, Roger Mills	49 min
Apr 30, 10:58 AM CDT	River Flood Warning	OUN	Grant, Kay, Noble	67 hr
Apr 30, 10:58 AM CDT	Severe Thunderstorm Warning	OUN	Noble, Payne	47 min
Apr 30, 10:59 AM CDT	River Flood Warning	OUN	Kingfisher, Logan	48 hr
Apr 30, 11:00 AM CDT	River Flood Warning	OUN	Pottawatomie, Seminole	27 hr
Apr 30, 11:16 AM CDT	Tornado Warning	OUN	Lincoln, Payne	44 min
Apr 30, 11:30 AM CDT	Special Weather Statement	OUN	Murray	30 min
Apr 30, 11:44 AM CDT	Severe Thunderstorm Warning	OUN	Payne	31 min
Apr 30, 11:49 AM CDT	Severe Thunderstorm Warning	OUN	Carter, Johnston, Murray, Pontotoc	41 min
Apr 30, 11:50 AM CDT	Tornado Warning	OUN	Lincoln, Payne	40 min
Apr 30, 11:58 AM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills, Woodward	47 min
Apr 30, 12:08 PM CDT	Tornado Warning	OUN	Johnston, Murray, Pontotoc	37 min
Apr 30, 12:30 PM CDT	Severe Thunderstorm Warning	OUN	Payne	15 min
Apr 30, 12:35 PM CDT	Tornado Warning	OUN	Pontotoc	25 min
Apr 30, 12:42 PM CDT	Special Weather Statement	OUN	Dewey	33 min
Apr 30, 12:53 PM CDT	Special Weather Statement	OUN	Lincoln	22 min
Apr 30, 1:19 PM CDT	Special Weather Statement	OUN	Payne	26 min
Apr 30, 1:26 PM CDT	Special Weather Statement	OUN	Major	34 min
Apr 30, 1:37 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major, Woods	38 min
Apr 30, 2:11 PM CDT	Special Weather Statement	OUN	Alfalfa, Woods	49 min
Apr 30, 2:23 PM CDT	River Flood Warning	OUN	Atoka	5 days
Apr 30, 2:33 PM CDT	Special Weather Statement	OUN	Garfield	27 min
Apr 30, 3:00 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	45 min
Apr 30, 3:06 PM CDT	Special Weather Statement	OUN	Canadian, Grady, McClain	24 min
Apr 30, 3:10 PM CDT	Severe Thunderstorm Warning	OUN	Tillman	50 min
Apr 30, 3:33 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Grady, Oklahoma	42 min
Apr 30, 3:35 PM CDT	Tornado Warning	OUN	Cotton, Tillman	40 min
Apr 30, 3:43 PM CDT	Special Weather Statement	OUN	Kay	32 min
Apr 30, 3:47 PM CDT	Areal Flood Advisory	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	3 hr
Apr 30, 3:57 PM CDT	Special Weather Statement	OUN	Cotton	33 min
Apr 30, 4:00 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Tillman	45 min
Apr 30, 4:03 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	42 min
Apr 30, 4:06 PM CDT	Special Weather Statement	OUN	McClain	24 min
Apr 30, 4:06 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Grady, Stephens	39 min
Apr 30, 4:08 PM CDT	Severe Thunderstorm Warning	OUN	Canadian, Logan, Oklahoma	52 min
Apr 30, 4:12 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Garvin, McClain	48 min
Apr 30, 4:24 PM CDT	Flash Flood Warning	OUN	Canadian, Cleveland, Oklahoma	3 hr
Apr 30, 4:31 PM CDT	Tornado Warning	OUN	Cotton	29 min
Apr 30, 4:32 PM CDT	Areal Flood Advisory	OUN	Lincoln, Logan, Noble, Oklahoma, Payne	3 hr
Apr 30, 4:48 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Cotton, Stephens	42 min
Apr 30, 4:49 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Logan, Oklahoma, Payne	41 min
Apr 30, 4:51 PM CDT	Special Weather Statement	OUN	Grady	24 min
Apr 30, 4:56 PM CDT	Tornado Warning	OUN	Cotton, Jefferson, Stephens	24 min
Apr 30, 5:05 PM CDT	Areal Flood Advisory	OUN	Caddo, Comanche, Cotton, Grady, Jefferson, McClain and 2 more	115 min
Apr 30, 5:16 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	44 min
Apr 30, 5:22 PM CDT	Areal Flood Advisory	OUN	Cleveland, Garvin, Grady, McClain, Oklahoma, Pottawatomie and 1 more	3 hr
Apr 30, 5:23 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, Lincoln, Pottawatomie	52 min
Apr 30, 5:33 PM CDT	Areal Flood Advisory	OUN	Cotton, Tillman	117 min
Apr 30, 5:50 PM CDT	Severe Thunderstorm Warning	OUN	Love	30 min
Apr 30, 5:57 PM CDT	Severe Thunderstorm Warning	OUN	Cotton, Tillman	48 min
Apr 30, 6:01 PM CDT	Flash Flood Warning	OUN	Lincoln, Logan, Oklahoma, Payne	119 min
Apr 30, 6:18 PM CDT	Special Weather Statement	OUN	Lincoln	27 min
Apr 30, 6:25 PM CDT	Special Weather Statement	OUN	Marshall	20 min
Apr 30, 6:46 PM CDT	Special Weather Statement	OUN	Cotton	29 min
Apr 30, 6:50 PM CDT	Areal Flood Advisory	OUN	Cleveland, Lincoln, Pottawatomie, Seminole	3 hr
Apr 30, 6:54 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain, Pottawatomie	51 min
Apr 30, 6:55 PM CDT	Severe Thunderstorm Warning	OUN	Cotton	50 min

Nearby

Flash Flood Warnings in Oklahoma, 2019 Every flash flood warning in 2019

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.