Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 171, NWS Tulsa, OK

May 9, 2000Nowata County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at May 9, 2000, 1:30 AM CDT for Nowata County, Oklahoma. It was in force for 45 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
May 9, 2000, 1:30 AM CDT (06:30 UTC)
Expired
May 9, 2000, 2:15 AM CDT
In force
45 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Nowata County, OK

The radar

The Tulsa radar (KINX), 70 km from the middle of the area, began a volume at 06:29 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

TimeReportWhereRemark
May 9, 1:45 AM CDTHail 1.75Lenapah, 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.

IssuedProductOfficeLasted
May 9, 12:00 AM CDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 6.5 hours before the alert went out and 162 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 2000-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1344 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 2000-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.193958Sfc1 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
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 090630
SVRTUL
OKC105-090715-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
130 AM CDT TUE MAY 9 2000

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

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

* UNTIL 215 AM CDT

* AT 128 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 3 MILES SOUTHWEST OF WANN...MOVING EAST AT 35
  MPH.

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...WANN... 
LENAPAH...DELAWARE AND CHILDERS

HAIL TO THE SIZE OF QUARTERS 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.

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 9, 12:12 AM CDT, 1 hour 18 minutes earlier.

Area forecast discussion, May 9, 12:12 AM CDT, 1 hour 18 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
1210 PM CDT MON MAY 8 2000

UPDATED ZONES AGAIN TO UPDATE HEADLINES AND LOWER POPS SOUTH OF FFA
AREA.  MOST OF RAINFALL WILL BE CONFINED TO THE NORTHERN HALF OF THE
FFA...BUT AM NOT CONFIDENT ENOUGH TO CANCEL THE SOUTHERN HALF OF THE
WATCH AREA AT THIS TIME GIVEN THE CURRENT STATE OF FLOODING IN THOSE
AREAS.

FCSTID = 19

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

In the hours before

Local storm report, May 8, 11:39 PM CDT, 1 hour 51 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, 1 hour 50 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, 1 hour 46 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, 1 hour 38 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
(
Special weather statement, May 9, 12:00 AM CDT, 1 hour 30 minutes before
OKZ054>062-064>067-090600-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TULSA OK
1200 AM CDT TUE MAY 9 2000

...TORNADO WATCH NUMBER 246 EXPIRED...

TORNADO WATCH NUMBER 246 FOR PARTS OF EASTERN OKLAHOMA HAS
EXPIRED.

SEVERE THUNDERSTORMS WILL CONTINUE IN FAR NORTHEAST OKLAHOMA IN THE
COUNTIES THAT BORDER KANSAS AND A SEVERE THUNDERSTORM WATCH HAS
BEEN ISSUED FOR THESE AREAS UNTIL 6AM.

SEE SHORT TERM FORECASTS FROM THIS OFFICE FOR DETAILS CONCERNING THE
THUNDERSTORMS.

STAY TUNED TO THIS STATION FOR FURTHER INFORMATION FROM THE
NATIONAL WEATHER SERVICE.
Local storm report, May 9, 12:16 AM CDT, 1 hour 14 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1216 AM CDT TUE MAY 09 2000

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

1154 PM    NOWATA                    OK    .75 INCH HAIL
05/08/00   NOWATA

1155 PM    LENAPAH                   OK    FLOOD
05/08/00   NOWATA                          WATER COVERING NUMEROUS
                                           ROADS IN AND AROUND
                                           LENEPAH

1158 PM    DEWEY                     OK    FLOOD
05/08/00   WASHINGTON                      WATER 2-3 INCHES DEEP
                                           IN BULLDOGGER APTS IN.
                                           DEWEY AND WATER OVER
                                           NUMEROUS STREETS IN
                                           DEWEY AND BARTLESVILLE

The office that day

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

IssuedProductOfficeCountiesLasted
May 8, 7:31 PM CDTSevere Thunderstorm WarningTSAOsage59 min
May 8, 8:25 PM CDTSevere Thunderstorm WarningTSAOsage65 min
May 8, 8:40 PM CDTSevere Thunderstorm WarningTSANowata, Osage, Washington65 min
May 8, 8:42 PM CDTSevere Thunderstorm WarningTSAPawnee48 min
May 8, 8:50 PM CDTTornado WarningTSANowata, Washington25 min
May 8, 8:50 PM CDTTornado WarningTSAOsage25 min
May 8, 9:29 PM CDTSevere Thunderstorm WarningTSACraig, Nowata61 min
May 8, 9:34 PM CDTSevere Thunderstorm WarningTSAPawnee56 min
May 8, 9:51 PM CDTSevere Thunderstorm WarningTSAOsage54 min
May 8, 10:46 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee59 min
May 8, 11:13 PM CDTSevere Thunderstorm WarningTSAWashington47 min
May 8, 11:29 PM CDTSevere Thunderstorm WarningTSANowata61 min
May 8, 11:45 PM CDTSevere Thunderstorm WarningTSAOsage60 min
May 8, 11:56 PM CDTSevere Thunderstorm WarningTSAWashington49 min
May 8, 11:58 PM CDTSevere Thunderstorm WarningTSACraig62 min
May 9, 3:02 AM CDTSevere Thunderstorm WarningTSADelaware43 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.