Alert archive / Oklahoma / Flash Flood Warnings in 1987

Flash Flood Warning 22, NWS Norman, OK

May 28, 1987Cleveland County, Garvin County, McClain County, Oklahoma

NWS Norman, OK issued this flash flood warning at May 28, 1987, 1:58 PM CDT for Cleveland County, Garvin County, McClain County, Oklahoma. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: May 28, 1987, 1:58 PM CDT (18:58 UTC)
Expired: May 28, 1987, 4:00 PM CDT
In force: 2 hr
Issued by: NWS Norman, OK
Area: Whole counties

Counties Cleveland County, OK, Garvin County, OK, McClain County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Fort Sill, OK (KFSI), launched 12:00Z, 7.0 hours before the alert went out and 102 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: 279 J/kg
Mixed-layer CIN: -183 J/kg
Mixed-layer LCL: 522 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 286 m²/s²
0-3 km storm-relative helicity: 266 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.0

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.

In the hours before

Special weather statement, May 28, 10:59 AM CDT, 2 hours 59 minutes before

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Special weather statement, May 28, 11:41 AM CDT, 2 hours 17 minutes before

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Special weather statement, May 28, 11:43 AM CDT, 2 hours 15 minutes before

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Special weather statement, May 28, 11:48 AM CDT, 2 hours 10 minutes before

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Special weather statement, May 28, 12:26 PM CDT, 1 hour 32 minutes before

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Special weather statement, May 28, 1:40 PM CDT, 18 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
May 27, 9:25 PM CDT	Flash Flood Warning	OUN	Comanche, Grady, Stephens	3 hr
May 27, 9:25 PM CDT	Flash Flood Warning	OUN	Canadian, Cleveland, Logan, Oklahoma	3 hr
May 27, 9:25 PM CDT	Flash Flood Warning	OUN	McClain	3 hr
May 27, 9:25 PM CDT	Flash Flood Warning	OUN	Caddo	3 hr
May 27, 10:15 PM CDT	Flash Flood Warning	OUN	Garvin	2 hr
May 28, 1:15 PM CDT	Flash Flood Warning	OUN	Caddo, Comanche, Grady, Kiowa	3 hr
May 28, 1:15 PM CDT	Flash Flood Warning	OUN	Cotton, Jefferson, Stephens, Tillman	3 hr
May 28, 1:15 PM CDT	Flash Flood Warning	OUN	Jackson	3 hr
May 28, 1:58 PM CDT	Flash Flood Warning	OUN	Canadian, Logan, Oklahoma	2 hr
May 28, 3:54 PM CDT	Flash Flood Warning	OUN	Caddo, Comanche, Cotton, Grady, Kiowa, Stephens and 1 more	4 hr
May 28, 3:54 PM CDT	Flash Flood Warning	OUN	Canadian, Cleveland, Kingfisher, Logan, McClain, Oklahoma	4 hr
May 28, 3:54 PM CDT	Flash Flood Warning	OUN	Jefferson	4 hr
May 28, 3:54 PM CDT	Flash Flood Warning	OUN	Garvin	4 hr
May 28, 3:54 PM CDT	Flash Flood Warning	OUN	Jackson	4 hr

Nearby

Flash Flood Warnings in Oklahoma, 1987 Every flash flood warning in 1987

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.