Alert archive / Oklahoma / Tornado Warnings in 1998

Tornado Warning 9, NWS Norman, OK

May 6, 1998Blaine County, Oklahoma

NWS Norman, OK issued this tornado warning at May 6, 1998, 6:00 PM CDT for Blaine County, Oklahoma. It was in force for 30 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: May 6, 1998, 6:00 PM CDT (23:00 UTC)
Expired: May 6, 1998, 6:30 PM CDT
In force: 30 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Blaine County, OK

The radar

The Vance AFB radar (KVNX), 83 km from the middle of the area, began a volume at 23:00 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 6, 3:00 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 11.0 hours before the alert went out and 104 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: 201 J/kg
Mixed-layer CIN: -145 J/kg
Mixed-layer LCL: 461 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: -14 m²/s²
0-3 km storm-relative helicity: 110 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

347 
WFUS1 KOKC 062302 RRA
TOROKC
OKC011-062330-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NORMAN OK
600 PM CDT WED MAY 6 1998

THE NATIONAL WEATHER SERVICE IN NORMAN HAS ISSUED A

* TORNADO WARNING FOR...
     NORTHERN BLAINE COUNTY IN NORTHWEST OKLAHOMA

* UNTIL 630 PM CDT

* AT 600 PM CDT DOPPLER RADAR CONTINUED TO INDICATE A SEVERE 
THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE MOST DANGEROUS 
PORTION OF THE STORM WAS LOCATED 2 MILES NORTHEAST OF SOUTHARD... 
MOVING EAST-SOUTHEAST AT 25 MILES PER HOUR.

* LOCATIONS IN THE WARNING INCLUDE SOUTHARD AND HITCHCOCK

TAKE COVER NOW. ABANDON MOBILE HOMES AND VEHICLES. MOVE TO A SHELTER
BELOW GROUND IF POSSIBLE. OTHERWISE...MOVE TO AN INTERIOR ROOM OR
HALLWAY ON THE LOWEST FLOOR. STAY AWAY FROM WINDOWS.

LAT...LON 3610 9846 3602 9850 3583 9821 3606 9822

The office that day

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

Issued	Product	Office	Counties	Lasted
May 5, 7:14 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	31 min
May 5, 7:43 PM CDT	Severe Thunderstorm Warning	OUN	Stephens	32 min
May 6, 4:46 AM CDT	Severe Thunderstorm Warning	OUN	Woods	59 min
May 6, 5:44 AM CDT	Severe Thunderstorm Warning	OUN	Woods	46 min
May 6, 3:58 PM CDT	Severe Thunderstorm Warning	OUN	Woods	47 min
May 6, 4:16 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	29 min
May 6, 4:36 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	39 min
May 6, 4:57 PM CDT	Severe Thunderstorm Warning	OUN	Alfalfa, Major	48 min
May 6, 5:12 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	33 min
May 6, 5:25 PM CDT	Tornado Warning	OUN	Blaine, Dewey	35 min
May 6, 6:26 PM CDT	Severe Thunderstorm Warning	OUN	Payne	19 min
May 6, 6:34 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	41 min
May 6, 6:42 PM CDT	Severe Thunderstorm Warning	OUN	Payne	33 min
May 6, 6:47 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	23 min

Nearby

Tornado Warnings in Oklahoma, 1998 Every tornado warning in 1998 Tornadoes in 1998

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.