Alert archive / Arkansas / Severe Thunderstorm Warnings in 1989

Severe Thunderstorm Warning 64, NWS Tulsa, OK

May 15, 1989Washington County, Arkansas

NWS Tulsa, OK issued this severe thunderstorm warning at May 15, 1989, 5:27 PM CDT for Washington County, Arkansas. It was in force for 63 min. 2 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 15, 1989, 5:27 PM CDT (22:27 UTC)
Expired
May 15, 1989, 6:30 PM CDT
In force
63 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Washington County, AR

The radar

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

What was reported inside it

TimeReportWhereRemark
May 15, 5:45 PM CDTHail 1.75Washington, AR
May 15, 6:00 PM CDTHail 1.75Washington, AR

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 10.5 hours before the alert went out and 300 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 12:00Z on 1989-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1339 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 12:00Z on 1989-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 48 square meters per square second.193958Sfc1 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
1339 J/kg
Mixed-layer CIN
-22 J/kg
Mixed-layer LCL
825 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
48 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
0.4
Supercell composite
2.0

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.

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 1:52 PM CDTSevere Thunderstorm WarningTSAOsage53 min
May 15, 2:01 PM CDTSevere Thunderstorm WarningTSAPawnee44 min
May 15, 2:37 PM CDTSevere Thunderstorm WarningTSACreek, Tulsa68 min
May 15, 2:50 PM CDTSevere Thunderstorm WarningTSAOsage, Tulsa, Washington55 min
May 15, 3:24 PM CDTSevere Thunderstorm WarningTSADelaware66 min
May 15, 3:30 PM CDTTornado WarningTSACreek60 min
May 15, 4:10 PM CDTSevere Thunderstorm WarningTSAMcIntosh50 min
May 15, 4:38 PM CDTSevere Thunderstorm WarningTSAPittsburg67 min
May 15, 5:28 PM CDTTornado WarningTSAPittsburg47 min

Nearby

Severe Thunderstorm Warnings in Arkansas, 1989Every severe thunderstorm warning in 1989

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.