Alert archive / Oklahoma / Flash Flood Warnings in 2015

Flash Flood Warning 118, NWS Norman, OK

July 2, 2015Logan County, Oklahoma County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jul 2, 2015, 8:51 PM CDT for Logan County, Oklahoma County, Oklahoma. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 2, 2015, 8:51 PM CDT (01:51 UTC)
Expired: Jul 2, 2015, 11:45 PM CDT
In force: 3 hr
Issued by: NWS Norman, OK
Area: Storm-based polygon
Flood severity: None

Counties Logan County, OK, Oklahoma County, OK

The radar

The Norman radar (KTLX), 47 km from the middle of the area, began a volume at 01:52 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.

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 1.9 hours before the alert went out and 57 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: 2056 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1244 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 73 m²/s²
0-3 km storm-relative helicity: 51 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 6.3

Open this sounding in Storm Lab

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 2, 6:32 PM CDT, 2 hours 19 minutes earlier.

Area forecast discussion, Jul 2, 6:32 PM CDT, 2 hours 19 minutes before

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Hazardous weather outlook, Jul 2, 8:13 PM CDT, 38 minutes before

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In the hours before

Special weather statement, Jul 2, 6:21 PM CDT, 2 hours 30 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE NORMAN OK
621 PM CDT THU JUL 2 2015

OKZ013-022345-
NOBLE OK-
621 PM CDT THU JUL 2 2015

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL NOBLE COUNTY UNTIL
645 PM CDT...

AT 618 PM CDT...A STRONG THUNDERSTORM WAS LOCATED 6 MILES SOUTHEAST
OF BILLINGS...MOVING SOUTHEAST AT 15 MPH.

HAZARDS INCLUDE...
WIND GUSTS TO 50 MPH...
HAIL UP TO THE SIZE OF NICKELS...
MINOR FLOODING IN AREAS OF POOR DRAINAGE...
FREQUENT CLOUD TO GROUND LIGHTNING...

LAT...LON 3645 9746 3652 9737 3641 9717 3628 9741
TIME...MOT...LOC 2318Z 328DEG 12KT 3644 9740

Special weather statement, Jul 2, 6:39 PM CDT, 2 hours 12 minutes before

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Special weather statement, Jul 2, 6:56 PM CDT, 1 hour 55 minutes before

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Special weather statement, Jul 2, 7:34 PM CDT, 1 hour 17 minutes before

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Special weather statement, Jul 2, 7:41 PM CDT, 1 hour 10 minutes before

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Special weather statement, Jul 2, 8:05 PM CDT, 46 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 2, 7:00 PM CDT	Areal Flood Advisory	OUN	Major	2 hr
Jul 2, 7:34 PM CDT	Special Weather Statement	OUN	Oklahoma	26 min
Jul 2, 7:41 PM CDT	Special Weather Statement	OUN	Woods	34 min
Jul 2, 7:46 PM CDT	Areal Flood Advisory	OUN	Logan	3 hr
Jul 2, 8:05 PM CDT	Special Weather Statement	OUN	Oklahoma	25 min
Jul 2, 8:17 PM CDT	Severe Thunderstorm Warning	OUN	Oklahoma	43 min
Jul 2, 8:22 PM CDT	Areal Flood Advisory	OUN	Oklahoma	113 min
Jul 2, 9:57 PM CDT	Areal Flood Advisory	OUN	Canadian, Cleveland, Grady, McClain, Oklahoma	2 hr
Jul 2, 11:53 PM CDT	Areal Flood Advisory	OUN	Cleveland, Logan, McClain, Oklahoma	3 hr
Jul 3, 2:11 AM CDT	Special Weather Statement	OUN	Cleveland	34 min
Jul 3, 2:48 AM CDT	Areal Flood Advisory	OUN	Cleveland, McClain	117 min
Jul 3, 5:25 AM CDT	Areal Flood Advisory	OUN	Garvin, Murray	3 hr
Jul 3, 6:42 AM CDT	Flash Flood Warning	OUN	Garvin, Johnston, Murray, Pontotoc	3 hr
Jul 3, 7:32 AM CDT	Areal Flood Advisory	OUN	Atoka, Bryan, Carter, Coal, Johnston, Marshall and 2 more	3 hr
Jul 3, 9:13 AM CDT	Areal Flood Advisory	OUN	Bryan	3 hr
Jul 3, 9:45 AM CDT	Areal Flood Warning	OUN	Garvin, Murray	3 hr
Jul 3, 3:47 PM CDT	Special Weather Statement	OUN	Ellis	28 min
Jul 3, 3:59 PM CDT	Special Weather Statement	OUN	Dewey	31 min
Jul 3, 4:13 PM CDT	Special Weather Statement	OUN	Jefferson	32 min
Jul 3, 4:16 PM CDT	Severe Thunderstorm Warning	OUN	Dewey, Ellis, Roger Mills	29 min
Jul 3, 4:20 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	40 min
Jul 3, 4:28 PM CDT	Special Weather Statement	OUN	Cleveland	32 min
Jul 3, 4:30 PM CDT	Severe Thunderstorm Warning	OUN	Cleveland, McClain	22 min
Jul 3, 4:43 PM CDT	Special Weather Statement	OUN	Canadian	32 min
Jul 3, 4:45 PM CDT	Severe Thunderstorm Warning	OUN	Custer, Dewey, Roger Mills	45 min
Jul 3, 4:49 PM CDT	Special Weather Statement	OUN	Hughes	26 min
Jul 3, 4:58 PM CDT	Severe Thunderstorm Warning	OUN	Jefferson	47 min
Jul 3, 5:01 PM CDT	Special Weather Statement	OUN	McClain	29 min
Jul 3, 5:20 PM CDT	Areal Flood Advisory	OUN	Jefferson	3 hr
Jul 3, 6:08 PM CDT	Special Weather Statement	OUN	Washita	37 min
Jul 3, 6:53 PM CDT	Special Weather Statement	OUN	Stephens	37 min
Jul 3, 3:53 PM CDT	Special Weather Statement	OUN	Clay	37 min
Jul 3, 5:35 PM CDT	Special Weather Statement	OUN	Wilbarger	25 min
Jul 3, 6:02 PM CDT	Special Weather Statement	OUN	Wilbarger	28 min
Jul 3, 6:27 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	48 min

Nearby

Flash Flood Warnings in Oklahoma, 2015 Every flash flood warning in 2015

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.