Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 211, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jun 27, 1997, 3:55 PM CDT for Sequoyah County, Oklahoma. It was in force for 50 min. 1 report 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
- Jun 27, 1997, 3:55 PM CDT (20:55 UTC)
- Expired
- Jun 27, 1997, 4:45 PM CDT
- In force
- 50 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Sequoyah County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 27, 4:15 PM CDT | Thunderstorm Wind | Sallisaw, OK |
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.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 8.9 hours before the alert went out and 178 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
- 341 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 960 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
294 WUUS1 KTUL 272055 RRA SVRTUL OKC135-272145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 355 PM CDT FRI JUN 27 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 445 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN EAST CENTRAL OKLAHOMA ...SEQUOYAH COUNTY AT 355 PM...RADAR INDICATED A SEVERE THUNDERSTORM 4 MILES SOUTHWEST OF SALLISAW. THIS STORM WAS NEARLY STATIONARY. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Tulsa, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 27, 3:32 PM CDT, 23 minutes earlier.
Area forecast discussion, Jun 27, 3:32 PM CDT, 23 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 330 PM CDT FRI JUN 27 1997 DIURNAL SHRA/TSRA ACTVTY HAS ONCE AGAIN DVLPD ACRS MUCH OF FA THIS AFTN AND XPCT MOST OF THIS TO DIMINISH AFT SUNSET AND DISSIPATE BY ABT 03-04Z. AFT THIS EVE ATTN WL BE TO S/W CRNTLY MVG INTO WRN TX. MDLS IN GENERAL AGREEMENT IN MVG THIS FEATURE SLOWLY ENEWD ACRS ERN OK/NW AR THRU THE WKND. IT APRS THAT THIS SHLD ENHANCE POSSIBILITY OF PRECIP BUT WL KEEP POPS IN CHC CAT. SOME INDICATIONS THAT BTR CHC OF PRECIP WL BE IN SRN SCTNS SO WL HV SLGTLY HIER POPS THERE. AS S/W CONTS OFF TO THE E WL END CHC OF PRECIP IN PARTS OF ERN OK BEGINNING SAT NGT. BY SUN WL JUST HV SLGT CHC POPS IN NW AR. ALTHO S/W IS FCST TO BE E OF ZNS BY 00Z MON THIS FEATURE MAY BE CLOSE ENOUGH TO HELP GENERATE SOME SHRA/TSRA IN COMBINATION W/HEATING. ELSEWHERE ACRS FA COULD CONT TO SEE SOME ISOLD AFTN/EVE SHRA/TSRA ON SUN DEPENDING ON ANY REMAINING BNDRYS BUT BELIEVE CHC OF PRECIP IS TOO SMALL TO MENTION ATTM. IN XTNDED WL INTRODUCE SLGT CHC TSRA FOR WED. BELIEVE THAT MRF IS TOO AGGRESSIVE IN BRING FNT INTO FA. BUT ECMWF DOES MV IT INTO SRN KS. ALTHO IF UPR RDG IS AS STRG AS FCST THEN ATMOS MAY BE WELL CAPPED BY THEN. PRELIM NMBRS TUL 72/91 72/91 1311 FSM 71/90 70/90 1431 MLC 70/90 70/90 2411 BVO 69/91 70/91 1311 FYV 67/86 66/86 1332 IDB 68/91 67/92 1431 BYV 66/87 65/86 2332 .TUL... OK...NONE. AR...NONER.
In the hours before
Special weather statement, Jun 27, 1:00 PM CDT, 2 hours 55 minutes before
ARZ001-002-010-011-019-029-OKZ054>076-281200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS THUNDERSTORM OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 100 PM CDT FRI JUN 27 1997 ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THIS AFTERNOON AND THIS EVENING. TEMPERATURES WARMING INTO THE UPPER 80S AND LOWER 90S THIS AFTERNOON HAVE RESULTED IN A MODERATELY UNSTABLE AIRMASS OVER EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THE AFTERNOON AND EARLY EVENING HOURS AS SEVERAL WEAK SURFACE BOUNDARIES OVER THE AREA HELP TO FOCUS DEVELOPMENT. IN ADDITION TO THE WEAK SURFACE BOUNDARIES...A SLOW MOVING UPPER LEVEL SYSTEM WAS MOVING ACROSS SOUTHWESTERN MISSOURI EARLY THIS AFTERNOON. ISOLATED PULSE SEVERE THUNDERSTORMS ARE POSSIBLE IN THIS TYPE OF ENVIRONMENT...BUT WEAK WIND FIELDS WILL LIMIT THE SEVERE THREAT TO DIME OR NICKEL SIZE HAIL AND WIND GUSTS UP TO 65 MPH. THE WEAK WIND FIELDS WILL ALSO CAUSE THE STORMS TO MOVE RATHER SLOWLY WHICH WILL ENHANCE THE POSSIBILITY OF SOME LOCALIZED HEAVY RAIN WITH THE STORMS. THUNDERSTORM INTENSITIES WILL DIMINISH AFTER 8 PM AS SURFACE TEMPERATURES GRADUALLY COOL. EMERGENCY MANAGEMENT AGENCIES AND STORM SPOTTER GROUPS SHOULD CONTINUE TO MONITOR LOCAL CONDITIONS.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 27, 4:44 PM CDT | Severe Thunderstorm Warning | TSA | Delaware | 31 min |
| Jun 27, 5:48 PM CDT | Flash Flood Warning | TSA | Rogers | 3 hr |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1997Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.