Alert archive / Oklahoma / Tornado Watches in 1998
Tornado Watch 166
The Storm Prediction Center issued this tornado watch at Apr 6, 1998, 2:00 PM CDT for 24 counties in Oklahoma; 17 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 6, 1998, 2:00 PM CDT (19:00 UTC)
- Expired
- Apr 6, 1998, 7:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 41 counties
Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Dickens County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Motley County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 4:30 PM CDT | Severe Thunderstorm Warning | OUN | Foard, Hardeman | 60 min |
| Apr 6, 4:55 PM CDT | Severe Thunderstorm Warning | OUN | Harper | 50 min |
| Apr 6, 5:23 PM CDT | Severe Thunderstorm Warning | OUN | Wilbarger | 67 min |
| Apr 6, 5:50 PM CDT | Tornado Warning | OUN | Wilbarger | 40 min |
| Apr 6, 6:01 PM CDT | Severe Thunderstorm Warning | OUN | Tillman | 44 min |
| Apr 6, 6:20 PM CDT | Severe Thunderstorm Warning | OUN | Wichita | 25 min |
| Apr 6, 6:26 PM CDT | Severe Thunderstorm Warning | OUN | Dewey, Woodward | 49 min |
| Apr 6, 6:39 PM CDT | Severe Thunderstorm Warning | OUN | Woods | 51 min |
| Apr 6, 6:43 PM CDT | Severe Thunderstorm Warning | OUN | Cotton, Tillman | 62 min |
| Apr 6, 6:54 PM CDT | Tornado Warning | OUN | Cotton, Tillman | 66 min |
| Apr 6, 6:55 PM CDT | Severe Thunderstorm Warning | OUN | Comanche, Stephens | 65 min |
The nearest sounding before it
Fort Sill, OK (KFSI), launched 12:00Z, 7.0 hours before the alert went out and 115 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.
- Mixed-layer CAPE
- 42 J/kg
- Mixed-layer CIN
- -271 J/kg
- Mixed-layer LCL
- 1039 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 206 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
514
WWUS9 KMKC 061832
SEL6
MKC WW 061832
OKZ000-TXZ000-070000-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 166
STORM PREDICTION CENTER NORMAN OK
132 PM CDT MON APR 6 1998
THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
WESTERN OKLAHOMA
EASTERN TEXAS PANHANDLE AND NORTHWEST TEXAS
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 200 PM UNTIL 700
PM CDT.
TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.
THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 75 MILES SOUTH SOUTHEAST OF CHILDRESS TEXAS TO 65
MILES NORTHWEST OF ENID OKLAHOMA.
REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA.
PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING
WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE
WARNINGS.
DISCUSSION...RAPIDLY DESTABILIZING AIRMASS INTO OK/N TX AHEAD OF
DRY LINE AND STRONG UPPER TROF. WIND PROFILES FAVORABLE WITH
HELICITIES OF 200-300 J/KG FOR SUPERCELLS AND TORNADOES. STORMS
EXPECTED TO FORM RAPIDLY ALONG AND AHEAD OF DRY LINE AND MOVE
RAPIDLY E/NE.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 480.
MEAN STORM MOTION VECTOR 23035.
...HALES
332,1010 370,1000 370,0972 332,0982Nearby
Tornado Watches in Oklahoma, 1998Tornado Watches in Texas, 1998Every tornado watch 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.