Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 169, NWS Tulsa, OK

May 8, 2000Washington County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 8, 2000, 11:56 PM CDT for Washington County, Oklahoma. It was in force for 49 min. 1 report came from 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, with what was reported inside it.

The facts

Issued: May 8, 2000, 11:56 PM CDT (04:56 UTC)
Expired: May 9, 2000, 12:45 AM CDT
In force: 49 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Washington County, OK

The radar

The Tulsa radar (KINX), 74 km from the middle of the area, began a volume at 04:57 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.

What was reported inside it

Time	Report	Where	Remark
May 9, 12:04 AM CDT	Hail 1.25	Dewey, 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 8, 6:30 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 4.9 hours before the alert went out and 191 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: 1344 J/kg
Mixed-layer CIN: -143 J/kg
Mixed-layer LCL: 1790 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.5

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KTSA 090459
SVRTUL
OKC147-090545-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1156 PM CDT MON MAY 8 2000

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN WASHINGTON COUNTY IN NORTHEAST OKLAHOMA

* UNTIL 1245 AM CDT

* AT 1156 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM JUST NORTH OF BARTLESVILLE...MOVING NORTHEAST  
  AT 45 MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...COPAN AND 
DEWEY.

HAIL TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED 
IN THE WARNED AREA.

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

LAT...LON 3662 9602 3661 9584 3698 9580 3700 9600

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 May 8, 10:30 PM CDT, 1 hour 26 minutes earlier.

Area forecast discussion, May 8, 10:30 PM CDT, 1 hour 26 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1030 PM CDT MON MAY 8 2000

AN AREA OF STRONG TO SEVERE THUNDERSTORMS CURRENTLY COVERS MOST OF
THE AREA NORTH OF INTERSTATE 44.  INDIVIDUAL STORMS HAVE BEEN MOVING
EAST...TRAINING OVER THE SAME AREAS...PRODUCING A CONSIDERABLE FLASH
FLOODING PROBLEM IN THE NORTHERN PORTION OF THE WATCH AREA.  THE CAP
HAS KEPT STORMS FROM FIRING ON THE FRONT SO FAR...BUT AS THE
LOW-LEVEL JET CONTINUES TO INCREASE AND LARGE-SCALE FORCING
CONTINUES TO LIFT THE INVERSION...THUNDESTORM DEVELOPMENT SOUTH OF
THE CURRENT AREA WILL LIKELY HAPPEN.  BOTH THE 00Z ETA AND NGM SHOW
A SOUTHWARD SHIFT IN THE QPF AFTER MIDNIGHT...SO SIGNIFICANT
RAINFALL IS STILL POSSIBLE IN THE SOUTHERN PART OF THE WATCH AREA.
CONTINUE FFATUL THROUGH THE NIGHT.  POTENTIAL FOR LARGE HAIL WITH
THE ELEVATED CONVECTION WILL CONTINUE THROUGH THE MUCH OF THE NIGHT.

AS FOR THE ZONES...ALREADY UPDATED TO SLIGHTLY INCREASE POPS SOUTH
OF THE CURRENT ACTIVITY.  MADE ONLY MINOR CHANGES TO TEMPERATURES
AND WINDS IN A FEW ZONES.

FCSTID = 19

.TUL...
AR...NONE.
OK...FLASH FLOOD WATCH FOR MONDAY NIGHT FOR ZONES ;OKZ054>064...
OKZ067.

In the hours before

Special weather statement, May 8, 11:00 PM CDT, 56 minutes before

OKZ054>062-064>067-090800-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TULSA OK
1100 PM CDT MON MAY 8 2000

...UPDATE FOR SHORT-TERM TRENDS...

A TORNADO WATCH CONTINUES UNTIL MIDNIGHT FOR PARTS OF EASTERN
OKLAHOMA.

OUTFLOW AIR FROM THUNDERSTORMS OVER NORTHEAST OKLAHOMA HAS BEGUN TO
FORCE THE STALLED FRONT SLOWLY SOUTH...HOWEVER THE FRONT WILL MAKE
ONLY SLOW PROGRESS DURING THE NIGHT AND IS EXPECTED TO EXTEND FROM
NEAR FAYETTEVILLE TO NEAR MCALESTER BY EARLY MORNING. EVENING
SOUNDING INFORMATION INDICATED THAT THE CAP WEAKENED CONSIDERABLY
SOUTH OF THE FRONT...BUT IS EXPECTED TO STRENGTHEN AGAIN DURING THE
NIGHT AND CONTINUE TO INHIBIT STORM DEVELOPMENT IN THE WARM AIR.

ELEVATED THUNDERSTORMS WILL CONTINUE TO REDEVELOP NEAR AND NORTH
OF THE FRONT ACROSS NORTHEAST OKLAHOMA THROUGH 3AM AS A SOUTHERLY
LOW-LEVEL JET STRENGTHENS AND OVERRUNS THE FRONT.  AFTER 3AM THE LOW-
LEVEL FLOW WILL BECOME MORE SOUT4HWESTERLY AND LIFT ALONG THE FRONT
WILL WEAKEN WITH SOME DECREASE IN THE STORMS EXPECTED.

THE THREAT FOR FLASH FLOODING AND LARGE HAIL WILL CONTINUE WITH
STORMS FOR THE NEXT SEVERAL HOURS IN NORTHEAST OKLAHOMA.

Local storm report, May 8, 11:37 PM CDT, 19 minutes before

PRELIMINARY LOCAL STORM REPORT...DELAYED REPORTS...
NATIONAL WEATHER SERVICE TULSA OK
1137 PM CDT MON MAY 08 2000

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0610 AM    2 E MORRIS                OK    .75 INCH HAIL
05/06/00   OKMULGEE

0610 AM    BOYNTON                   OK    .75 INCH HAIL
05/06/00   MUSKOGEE

Local storm report, May 8, 11:39 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
831 PM CDT MON MAY 08 2000

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0820 PM    FORAKER                   OK    .88 INCH HAIL
05/08/00   OSAGE

0825 PM    PEARSONIA                 OK    .88 INCH HAIL
05/08/00   OSAGE

Local storm report, May 8, 11:40 PM CDT, 16 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
905 PM CDT MON MAY 08 2000

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0858 PM    BARTLESVILLE              OK    .88 INCH HAIL
05/08/00   WASHINGTON

0859 PM    COPAN                     OK    .75 INCH HAIL
05/08/00   WASHINGTON

0903 PM    COPAN                     OK    1 INCH HAIL
05/08/00   WASHINGTON

Local storm report, May 8, 11:44 PM CDT, 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1144 PM CDT MON MAY 08 2000

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....
t
1111 PM    PAWHUSKA                  OK    1.25 INCH HAIL
05/08/00   OSAGE

Local storm report, May 8, 11:52 PM CDT, 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1152 PM CDT MON MAY 8 2000

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1128 PM    BARTLESVILLE              OK    4.5 INCH HAIL
05/08/00   WASHINGTON                      NUMEROUS REPORTS HAIL
                                           UP TO SOFTBALL SIZE
                                           1128 TO 1133 PM
(

The office that day

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

Issued	Product	Office	Counties	Lasted
May 8, 7:31 PM CDT	Severe Thunderstorm Warning	TSA	Osage	59 min
May 8, 8:25 PM CDT	Severe Thunderstorm Warning	TSA	Osage	65 min
May 8, 8:40 PM CDT	Severe Thunderstorm Warning	TSA	Nowata, Osage, Washington	65 min
May 8, 8:42 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	48 min
May 8, 8:50 PM CDT	Tornado Warning	TSA	Nowata, Washington	25 min
May 8, 8:50 PM CDT	Tornado Warning	TSA	Osage	25 min
May 8, 9:29 PM CDT	Severe Thunderstorm Warning	TSA	Craig, Nowata	61 min
May 8, 9:34 PM CDT	Severe Thunderstorm Warning	TSA	Pawnee	56 min
May 8, 9:51 PM CDT	Severe Thunderstorm Warning	TSA	Osage	54 min
May 8, 10:46 PM CDT	Severe Thunderstorm Warning	TSA	Osage, Pawnee	59 min
May 8, 11:13 PM CDT	Severe Thunderstorm Warning	TSA	Washington	47 min
May 8, 11:29 PM CDT	Severe Thunderstorm Warning	TSA	Nowata	61 min
May 8, 11:45 PM CDT	Severe Thunderstorm Warning	TSA	Osage	60 min
May 8, 11:58 PM CDT	Severe Thunderstorm Warning	TSA	Craig	62 min
May 9, 1:30 AM CDT	Severe Thunderstorm Warning	TSA	Nowata	45 min
May 9, 3:02 AM CDT	Severe Thunderstorm Warning	TSA	Delaware	43 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 2000 Every 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.