Alert archive / Oklahoma / Tornado Watches in 2001

Tornado Watch 99

April 6, 200135 counties in Oklahoma

The Storm Prediction Center issued this tornado watch at Apr 6, 2001, 7:00 PM CDT for 35 counties in Oklahoma. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Apr 6, 2001, 7:00 PM CDT (00:00 UTC)
Expired
Apr 7, 2001, 12:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 35 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, McClain County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Tulsa County, OK, Washington County, OK, Washita County, OK, Woods County, OK, Woodward County, OK

Warnings issued inside it

11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 6, 7:07 PM CDTTornado WarningOUNEllis, Roger Mills23 min
Apr 6, 7:23 PM CDTSevere Thunderstorm WarningOUNCuster, Dewey, Ellis, Major, Roger Mills, Woodward52 min
Apr 6, 7:23 PM CDTSevere Thunderstorm WarningOUNHarper, Woods52 min
Apr 6, 7:23 PM CDTSevere Thunderstorm WarningOUNBeckham, Washita52 min
Apr 6, 7:31 PM CDTTornado WarningOUNDewey, Ellis, Woodward29 min
Apr 6, 8:00 PM CDTSevere Thunderstorm WarningOUNDewey, Major, Woods, Woodward45 min
Apr 6, 8:00 PM CDTSevere Thunderstorm WarningOUNAlfalfa45 min
Apr 6, 8:00 PM CDTSevere Thunderstorm WarningOUNBlaine45 min
Apr 6, 8:45 PM CDTSevere Thunderstorm WarningOUNAlfalfa, Garfield, Grant45 min
Apr 6, 8:45 PM CDTSevere Thunderstorm WarningOUNBlaine, Kingfisher, Major45 min
Apr 6, 9:28 PM CDTSevere Thunderstorm WarningOUNGarfield, Grant, Kay, Noble47 min

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.0 hours before the alert went out and 98 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-pSkew-T log-p diagram, Norman, OK at 00:00Z on 2001-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 136 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 00:00Z on 2001-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
136 J/kg
Mixed-layer CIN
-705 J/kg
Mixed-layer LCL
1171 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
147 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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The text

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

Nearby

Tornado Watches in Oklahoma, 2001Every tornado watch in 2001

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.