Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 273, NWS Tulsa, OK

July 12, 2000Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jul 12, 2000, 8:39 PM CDT for Mayes County, Oklahoma. It was in force for 51 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
Jul 12, 2000, 8:39 PM CDT (01:39 UTC)
Expired
Jul 12, 2000, 9:30 PM CDT
In force
51 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Mayes County, OK

The radar

The Tulsa radar (KINX), 38 km from the middle of the area, began a volume at 01:43 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 nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 1.7 hours before the alert went out and 142 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, Springfield, MO at 00:00Z on 2000-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3481 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2000-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 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
3481 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1013 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 130140
SVRTUL
OKC097-130230-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
839 PM CDT WED JUL 12 2000

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MAYES COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 930 PM CDT

* AT 839 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 5 MILES NORTHWEST OF ADAIR...MOVING SOUTH AT 20
  MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...ADAIR...SALINA
  AND PRYOR.

HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 65 MPH CAN BE EXPECTED 
IN THE WARNED AREA.

CALL 1-800-722-2778 TO REPORT SEVERE WEATHER TO THE NATIONAL WEATHER
SERVICE.

LAT...LON 3659 9522 3656 9544 3619 9541 3623 9510

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 Jul 12, 7:05 PM CDT, 1 hour 34 minutes earlier.

Area forecast discussion, Jul 12, 7:05 PM CDT, 1 hour 34 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
705 PM CDT WED JUL 12 2000

NEED TO SEND OUT A QUICK UPDATE TO ADD POPS FARTHER S INTO NE AND
FAR NW AR.

OUTFLOW FROM SE KS TSRA HAS PUSHED INTO THE FAR NRN AREAS OF
OUR KS BORDERING COUNTIES...WITH ISOLD-WDLY SCT NEW CONVECTION
FIRING ALONG THIS BOUNDARY.  WEAK STEERING FLOW IS N-NW...SO THIS
ACTIVITY SHOULD PUSH A BIT FARTHER S AND SE.

EX>PECT CONVECTION TO WEAKEN BY 10PM AS INSTABILITY DECREASES WITH
LOSS OF HEATING.

UPDATED ZONES OUT SHORTLY.

FCSTID = 18

.TUL...
AR...NONE.
OK...NONE.

In the hours before

Special weather statement, Jul 12, 3:00 PM CDT, 5 hours 39 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-141100-

EASTERN OKLAHOMA AND NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
300 PM CDT TUE JUL 12 2000

...ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS EVENING ACROSS FAR
SOUTHEAST OKLAHOMA...

.SYNOPSIS...
AN EAST-WEST BOUNDARY ACROSS SOUTHEAST OKLAHOMA INTO SOUTHERN ARKANSAS
WILL DRIFT SOUTHWARD THROUGH TONIGHT.

.PRIMARY HAZARD...
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON ACROSS
PARTS OF FAR SOUTHEAST OKLAHOMA.  THE PRIMARY THREAT WILL BE DAMAGING
WIND GUSTS TO 65 MPH.  HOWEVER...THE POSSIBILITY OF HAIL AS LARGE AS A
DIME CANNOT BE RULED OUT.

.DISCUSSION...
STRONG HEATING COMBINED WITH SURFACE DEWPOINTS IN THE MID 70S HAVE
PRODUCED STRONG INSTABILITY ACROSS SOUTHEAST OKLAHOMA THIS AFTERNOON.
SURFACE BASED CAPES ARE IN THE EXCESS OF 4000 J/KG.  STEEP LOW AND MID
LEVEL LAPSE RATES WILL ENHANCE THE THREAT FOR DAMAGING WINDS ACROSS FAR
SOUTHEAST OKLAHOMA THROUGH 9 PM THIS EVENING.

HOWEVER...WINDS ALOFT ARE WEAK AND DO NOT SUPPORT SUSTAINED SEVERE
WEATHER.  THE WEAK WINDS WILL LIKELY MEAN THAT THE STORMS WHICH DEVELOP
ARE LIKELY TO COLLAPSE ONTO THE UPDRAFT.  NEVERTHELESS...THE QUICK
COLLAPSE OF A STRONG THUNDERSTORM MAY PRODUCE A DAMAGING WIND GUST.

.OTHER HAZARDS...
HEAT INDICES WILL BE IN THE 105 TO 110 DEGREE RANGE THIS AFTERNOON.
PEOPLE SHOULD TAKE PRECAUTIONS TO PROTECT THEMSELVES FROM EXCESSIVE
HEAT.

.EMERGENCY AGENCY AND SPOTTER ACTIVATION...
SPOTTER ACTIVATION IN PUSHMATAHA AND CHOCTAW COUNTIES MAY BE REQUIRED
THIS AFTERNOON OR THIS EVENING.  THE ACTIVITY SHOULD DIMINISH RAPIDLY
AFTER DARK.
Special weather statement, Jul 12, 3:30 PM CDT, 5 hours 9 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-131100-

EASTERN OKLAHOMA AND NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
330 PM CDT TUE JUL 12 2000

...ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE THIS EVENING ACROSS FAR
NORTHEAST OKLAHOMA...

.SYNOPSIS...
AN EAST-WEST BOUNDARY ACROSS SOUTH CENTRAL AND EAST CENTRAL KANSAS WILL
DRIFT SOUTHWARD THROUGH TONIGHT.

.PRIMARY HAZARD...
ISOLATED SEVERE THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON ACROSS
PARTS OF SOUTH CENTRAL AND EAST CENTRAL KANSAS.  THE STORMS MAY DRIFT AS
FAR SOUTH AS FAR NORTHEAST OKLAHOMA THIS EVENING BEFORE WEAKENING.  THE
PRIMARY THREAT WILL BE DAMAGING WIND GUSTS TO 60 MPH.

.DISCUSSION...
STRONG HEATING COMBINED WITH SURFACE DEWPOINTS IN THE LOWER 70S HAVE
PRODUCED STRONG INSTABILITY ACROSS ALL OF THE AREA THIS AFTERNOON.
SURFACE BASED CAPES ARE IN THE RANGE OF 4000-5000 J/KG. STEEP LOW AND
MID LEVEL LAPSE RATES WILL ENHANCE THE THREAT FOR DAMAGING WINDS ACROSS
FAR NORTHEAST OKLAHOMA BETWEEN 600 PM AND 9 PM THIS EVENING.

HOWEVER...WINDS ALOFT ARE WEAK AND DO NOT SUPPORT SUSTAINED SEVERE
WEATHER.  MOST OF THE STORMS WILL PULSE DOWN ALMOST AS QUICKLY AS THEY
DEVELOP.  HOWEVER...THE QUICK COLLAPSE OF THE STORMS MAY PRODUCE A
DAMAGING WIND GUST.

.OTHER HAZARDS...
HEAT INDICES WILL BE IN THE 105 TO 110 DEGREE RANGE THIS AFTERNOON.
PLEASE REFER TO THE SHORT TERM FORECAST /OKCNOWTUL/ FOR FURTHER DETAILS
ON THIS AFTERNOON/S EXCESSIVE HEAT.

.EMERGENCY AGENCY AND SPOTTER ACTIVATION...
SPOTTER ACTIVATION MAY BE REQUIRED ACROSS FAR NORTHEAST OKLAHOMA
GENERALLY IN THE COUNTIES BORDERING KANSAS AFTER 500 PM.



The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 7:10 PM CDTSevere Thunderstorm WarningTSACraig50 min
Jul 12, 8:09 PM CDTSevere Thunderstorm WarningTSADelaware51 min
Jul 12, 9:14 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa46 min
Jul 12, 10:00 PM CDTSevere Thunderstorm WarningTSARogers, Tulsa, Wagoner60 min
Jul 12, 11:26 PM CDTSevere Thunderstorm WarningTSACreek64 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2000Every severe thunderstorm warning in 2000

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.