Alert archive / Oklahoma / Flash Flood Warnings in 1999

Flash Flood Warning 41, NWS Norman, OK

June 10, 1999Major County, Oklahoma

NWS Norman, OK issued this flash flood warning at Jun 10, 1999, 5:31 AM CDT for Major County, 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 counties it named.

The facts

Issued: Jun 10, 1999, 5:31 AM CDT (10:31 UTC)
Expired: Jun 10, 1999, 9:30 AM CDT
In force: 4 hr
Issued by: NWS Norman, OK
Area: Whole counties

County Major County, OK

The radar

The Vance AFB radar (KVNX), 60 km from the middle of the area, began a volume at 10:32 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, 10.5 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: 1143 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 1477 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 87 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Jun 10, 3:10 AM CDT, 2 hours 21 minutes earlier.

Area forecast discussion, Jun 10, 3:10 AM CDT, 2 hours 21 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
Jun 9, 7:04 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	46 min
Jun 9, 7:15 PM CDT	Severe Thunderstorm Warning	OUN	Major	45 min
Jun 9, 7:30 PM CDT	Flash Flood Warning	OUN	Alfalfa, Garfield, Grant, Major	3 hr
Jun 9, 9:00 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	45 min
Jun 9, 9:30 PM CDT	Flash Flood Warning	OUN	Blaine, Kingfisher	3 hr
Jun 9, 11:35 PM CDT	Flash Flood Warning	OUN	Garfield, Kingfisher	8 hr
Jun 10, 7:28 AM CDT	Flash Flood Warning	OUN	Blaine	3 hr
Jun 10, 7:35 AM CDT	Flash Flood Warning	OUN	Garfield, Kingfisher	3 hr
Jun 10, 10:35 AM CDT	Flash Flood Warning	OUN	Blaine, Garfield, Kingfisher, Logan, Major	6 hr
Jun 10, 1:40 PM CDT	Severe Thunderstorm Warning	OUN	Kiowa, Tillman	50 min
Jun 10, 2:24 PM CDT	Flash Flood Warning	OUN	Kiowa, Tillman	3 hr
Jun 10, 5:52 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	38 min
Jun 10, 6:29 PM CDT	Severe Thunderstorm Warning	OUN	Wilbarger	46 min
Jun 10, 6:42 PM CDT	Severe Thunderstorm Warning	OUN	Knox	48 min

Nearby

Flash Flood Warnings in Oklahoma, 1999 Every flash flood warning in 1999

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.