Alert archive / Oklahoma / Tornado Watches in 1997
Tornado Watch 320
The Storm Prediction Center issued this tornado watch at May 25, 1997, 8:00 PM CDT for 51 counties in Oklahoma; 19 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 25, 1997, 8:00 PM CDT (01:00 UTC)
- Expired
- May 26, 1997, 1:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 70 counties
Atoka County, OK, Bryan County, OK, Canadian County, OK, Carter County, OK, Cherokee County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Haskell County, OK, Hughes County, OK, Jefferson County, OK, Johnston County, OK, Kay County, OK, Kingfisher County, OK, Latimer County, OK, Lincoln County, OK, Logan County, OK, Love County, OK, Marshall County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Rogers County, OK, Seminole County, OK, Stephens County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Clay County, TX, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Fannin County, TX, Grayson County, TX, Hopkins County, TX, Hunt County, TX, Jack County, TX, Lamar County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Tarrant County, TX, Wise County, TX
The radar
The Norman radar (KTLX), 109 km from the middle of the area, began a volume at 01:00 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.
Warnings issued inside it
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 8:05 PM CDT | Tornado Warning | OUN | Coal, Johnston, Pontotoc | 55 min |
| May 25, 8:15 PM CDT | Tornado Warning | FWD | Cooke | 60 min |
| May 25, 8:17 PM CDT | Tornado Warning | FWD | Montague | 28 min |
| May 25, 8:30 PM CDT | Flash Flood Warning | FWD | Cooke | 3 hr |
| May 25, 8:36 PM CDT | Tornado Warning | OUN | Johnston, Marshall | 39 min |
| May 25, 8:45 PM CDT | Tornado Warning | FWD | Montague | 15 min |
| May 25, 8:46 PM CDT | Severe Thunderstorm Warning | OUN | Carter | 44 min |
| May 25, 8:59 PM CDT | Tornado Warning | OUN | Atoka, Johnston | 31 min |
| May 25, 9:07 PM CDT | Tornado Warning | OUN | Kay | 38 min |
| May 25, 9:11 PM CDT | Tornado Warning | FWD | Grayson | 64 min |
| May 25, 9:14 PM CDT | Tornado Warning | FWD | Cooke | 61 min |
| May 25, 9:15 PM CDT | Tornado Warning | OUN | Bryan, Marshall | 45 min |
| May 25, 9:25 PM CDT | Tornado Warning | OUN | Atoka, Pushmataha | 35 min |
| May 25, 9:39 PM CDT | Tornado Warning | OUN | Kay | 51 min |
| May 25, 9:57 PM CDT | Tornado Warning | OUN | Atoka | 48 min |
| May 25, 10:00 PM CDT | Tornado Warning | OUN | Bryan | 45 min |
| May 25, 10:11 PM CDT | Tornado Warning | FWD | Cooke | 64 min |
| May 25, 10:14 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 61 min |
| May 25, 10:16 PM CDT | Severe Thunderstorm Warning | FWD | Grayson | 44 min |
| May 25, 10:23 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 52 min |
| May 25, 10:26 PM CDT | Tornado Warning | OUN | Kay | 44 min |
| May 25, 10:29 PM CDT | Severe Thunderstorm Warning | FWD | Fannin | 61 min |
| May 25, 10:38 PM CDT | Tornado Warning | FWD | Grayson | 37 min |
| May 25, 10:40 PM CDT | Tornado Warning | TSA | Osage | 35 min |
| May 25, 10:45 PM CDT | Tornado Warning | OUN | Atoka, Pushmataha | 45 min |
| May 25, 10:48 PM CDT | Tornado Warning | FWD | Collin | 42 min |
| May 25, 11:30 PM CDT | Tornado Warning | OUN | Choctaw, Pushmataha | 45 min |
| May 25, 11:59 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 31 min |
| May 26, 12:32 AM CDT | Severe Thunderstorm Warning | TSA | Craig, Ottawa | 43 min |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.0 hours before the alert went out and 99 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
- 360 J/kg
- Mixed-layer CIN
- -169 J/kg
- Mixed-layer LCL
- 1368 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
953 WWUS9 KMKC 260027 SEL0 MKC WW 260027 OKZ000-TXZ000-260600- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 320 STORM PREDICTION CENTER NORMAN OK 727 PM CDT SUN MAY 25 1997 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF CENTRAL AND EASTERN OKLAHOMA NORTH CENTRAL AND NORTHEAST TEXAS EFFECTIVE THIS SUNDAY NIGHT AND MONDAY MORNING FROM 800 PM UNTIL 100 AM CDT. TORNADOES...HAIL TO 2 3/4 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 95 STATUTE MILES EAST AND WEST OF A LINE FROM 20 MILES SOUTHEAST OF FORT WORTH TEXAS TO 20 MILES NORTHWEST OF BARTLESVILLE 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. OTHER WATCH INFORMATION...THIS TORNADO WATCH REPLACES TORNADO WATCH NUMBER 318. WATCH NUMBER 318 WILL NOT BE IN EFFECT AFTER 800 PM CDT. CONTINUE...WW 319... DISCUSSION...CLUSTERS OF SUPERCELL THUNDERSTORMS CONTINUE TO PROPAGATE EASTWARD AND SOUTHEASTWARD ACROSS SOUTH CENTRAL OKLAHOMA AND NORTH CENTRAL TEXAS. POTENTIAL EXISTS FOR ADDITIONAL DEVELOPMENT ALONG DRY LINE OVER CENTRAL OKLAHOMA WHERE LOW LEVEL CONVERGENCE PERSISTS. STRONG WESTERLY MID AND UPPER LEVEL WINDS ARE EXPECTED TO REMAIN ACROSS OKLAHOMA...WHILE SOUTHERLY LOW LEVEL JET IS FORECAST TO INCREASE OVER EASTERN OKLAHOMA TONIGHT. THREAT FOR LARGE HAIL AND TORNADOES EXPECTED TO CONTINUE INTO THE EARLY MORNING HOURS. ADDITIONAL WATCHES...NEW WATCH MAY BE NEEDED SOON ACROSS CENTRAL AND EASTERN KANSAS SOON. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 3/4 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 550. MEAN STORM MOTION VECTOR 27025. ...WEISS 323,0984 365,0975 365,0943 323,0952
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 6:00 PM CDT | Tornado Watch | SPC | Adair, Cherokee, Craig, Creek, Delaware, Haskell and 24 more | 6 hr |
Nearby
Tornado Watches in Oklahoma, 1997Tornado Watches in Texas, 1997Every tornado watch in 1997
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.