Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 88, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 20, 2000, 12:23 AM CDT for McIntosh County, Pittsburg County, Oklahoma. It was in force for 52 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
- Apr 20, 2000, 12:23 AM CDT (05:23 UTC)
- Expired
- Apr 20, 2000, 1:15 AM CDT
- In force
- 52 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties McIntosh County, OK, Pittsburg County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 20, 12:25 AM CDT | Hail 0.75 | Raiford, 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 |
|---|---|---|---|
| Apr 19, 10:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 5.4 hours before the alert went out and 157 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
- 144 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 2603 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS54 KTSA 200524
SVRTUL
OKC091-121-200615-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1223 AM CDT THU APR 20 2000
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MCINTOSH COUNTY IN SOUTHEAST OKLAHOMA
NORTHERN PITTSBURG COUNTY IN SOUTHEAST OKLAHOMA
* UNTIL 115 AM CDT
* AT 1223 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTH OF
STIDHAM TO INDIANOLA TO 9 MILES SOUTHWEST OF CROWDER...MOVING EAST
AT 35 MPH.
* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...CANADIAN...
INDIANOLA...CROWDER...BLOCKER...RENTIESVILLE...STIDHAM...VIVIAN...
RAIFORD...CHECOTAH AND EUFAULA
HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN
THE WARNED AREA.
A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY
FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER
CONDITIONS.
CALL 1-800-722-2778 TO REPORT SEVERE WEATHER TO THE NATIONAL WEATHER
SERVICE.
LAT...LON 3556 9580 3519 9588 3494 9588 3499 9552
3523 9546 3556 9534What 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 Apr 19, 9:22 PM CDT, 3 hours 1 minute earlier.
Area forecast discussion, Apr 19, 9:22 PM CDT, 3 hours 1 minute before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 922 PM CDT WED APR 19 2000 CAPPING INVERSION AND WEAK CONVERGENCE ALONG DRYLINE HAS KEPT BOUNDARY-LAYER BASED CONVECTION FROM DEVELOPING ACROSS THE FORECAST AREA SO FAR THIS EVENING. SURFACE OBSERVATIONS AND SATELLITE IMAGERY SHOW THE DRYLINE EXTENDING FROM SOUTHEAST KANSAS ACROSS THE NORTHWEST CORNER OF OSAGE COUNTY TO JUST NORTHWEST OF KOKC. SURFACE COLD FRONT WAS SURGING RAPIDLY SOUTHEAST ACROSS CENTRAL KANSAS AND NORTHWEST OKLAHOMA. EVENING UPPER AIR ANALYSIS INDICATED AN UPPER LEVEL SPEED MAX MOVING NORTHEAST ACROSS TEXAS PANHANDLE. RAPID DEVELOPMENT OF CLOUDS IN NORTHWEST OKLAHOMA SUGGESTS THAT LIFT ASSOCIATED WITH THE SPEED MAX WAS SPREADING EAST. STILL EXPECT AT LEAST SCATTERED SEVERE STORMS TO AFFECT THE FORECAST AREA TONIGHT. CURRENT INDICATIONS ARE THAT CONVECTION MAY INITIALLY FIRE TO THE WEST BETWEEN 10 AND 11 PM AS COLD FRONT CATCHES UP TO DRYLINE AND STRONG INSTABILITY IS RELEASED. THE UPPER SPEED MAX WILL PROVIDE THE LIFT/DYNAMICS TO KEEP THE STORMS GOING WELL INTO THE NIGHT AS CONVECTION MOVES ACROSS THE AREA. THERE ARE STILL SOME UNCERTAINTIES REGARDING COVERAGE OF STORMS TONIGHT...SO I PREFER NOT TO ADJUST FIRST PERIOD OF FORECAST AT THIS TIME. HOWEVER...IF STORMS DO INDEED FIRE ALONG THE COLD FRONT AS EXPECTED...WILL THEN ISSUE AN UPDATE TO RAISE POPS TO CATEGORICAL IN SOME AREAS WITH POTENTIAL FOR RAPIDLY MOVING SQUALL LINE. FCSTID = 9 .TUL... AR...NONE. OK...NONE.
In the hours before
Special weather statement, Apr 19, 9:45 PM CDT, 2 hours 38 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-201200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 945 PM CDT WED APR 19 2000 ...A FEW SEVERE THUNDERSTORMS ARE EXPECTED LATE TONIGHT THROUGH EARLY THURSDAY MORNING ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS... .SYNOPSIS... SURFACE LOW PRESSURE WAS LOCATED OVER NORTHEAST NEBRASKA THIS EVENING. THE DRYLINE EXTENDED SOUTH FROM THE LOW THROUGH EASTERN KANSAS INTO CENTRAL OKLAHOMA. THE DRYLINE WAS RETREATING TO THE WEST...AS A STRONG COLD FRONT WAS RAPIDLY ADVANCING SOUTHEAST ACROSS NORTHWEST OKLAHOMA. THE INTERSECTION OF THE COLD FRONT AND THE DRYLINE WILL RESULT IN SCATTERED SEVERE THUNDERSTORMS LATE THIS EVENING ACROSS NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS. .PRIMARY HAZARD... SEVERE THUNDERSTORMS ARE STILL EXPECTED TO DEVELOP ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS LATE TONIGHT. THE MAIN THREAT FROM THESE STORMS WILL BE LARGE HAIL...AND DAMAGING STRAIGHT LINE WINDS. IN ADDITION...ISOLATED TORNADOES MAY ALSO DEVELOP DUE TO SUFFICIENT SHEAR. .DISCUSSION... VERY WARM AIR ALOFT KEPT THUNDERSTORMS FROM FIRING UP MOST OF THE DAY ACROSS OKLAHOMA AND ARKANSAS. THE CAP DID BREAK IN SOME LOCATIONS THIS AFTERNOON AND EARLY EVENING...MAINLY ACROSS EASTERN KANSAS AND WESTERN MISSOURI. SOME ELEVATED CONVECTION ALSO DEVELOPED ACROSS NORTHWEST ARKANSAS. HOWEVER EVENING SOUNDINGS AT 7 PM REVEALED THE ENVIRONMENT WAS TOO WARM AT MID LEVELS TO SUPPORT SURFACE BASED THUNDERSTORMS...DESPITE INCREASING INSTABILITY. STORMS ARE EXPECTED TO DEVELOP LATE TONIGHT ACROSS NORTH CENTRAL OKLAHOMA...AS THE RETREATING DRYLINE MERGES WITH THE ADVANCING COLD FRONT. THIS WILL PROVIDE THE LIFT NECESSARY TO INITIATE THUNDERSTORMS. GIVEN THE UNSTABLE ENVIRONMENT THESE STORMS WILL MOVE INTO...IT IS LIKELY THE STORMS WILL QUICKLY BECOME SEVERE. .SPOTTER ACTIVATION... SPOTTERS ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS SHOULD BE PREPARED FOR ACTIVATION TONIGHT. THE MOST LIKELY TIME FOR ACTIVATION WILL BE BETWEEN 11 PM AND 1 AM IN EASTERN OKLAHOMA AND 2 AM AND 5 AM OVER NORTHWEST ARKAENSAS.
Local storm report, Apr 19, 11:28 PM CDT, 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1128 PM CDT WED APR 19 2000
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1120 PM BEGGS OK 1 INCH HAIL
04/19/00 OKMULGEE PUBLIC REPORT OF
QUARTER SIZED HAIL.
DRMLocal storm report, Apr 20, 12:11 AM CDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1211 AM CDT THU APR 20 2000
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1156 PM BIXBY OK 70 MPH TSTM GUST
04/19/00 TULSA 60 TO 70 MPH WINDS
REPORTED BY OFF DUTY
NWS EMPLOYEE.
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DRMThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 10:22 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 38 min |
| Apr 19, 10:33 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Okfuskee | 42 min |
| Apr 19, 11:02 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee, Washington | 58 min |
| Apr 19, 11:06 PM CDT | Severe Thunderstorm Warning | TSA | Okfuskee, Okmulgee | 54 min |
| Apr 19, 11:14 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 46 min |
| Apr 19, 11:29 PM CDT | Severe Thunderstorm Warning | TSA | Okmulgee, Tulsa, Wagoner | 61 min |
| Apr 19, 11:29 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 61 min |
| Apr 19, 11:37 PM CDT | Severe Thunderstorm Warning | TSA | Nowata | 38 min |
| Apr 19, 11:46 PM CDT | Tornado Warning | TSA | Muskogee, Wagoner | 44 min |
| Apr 19, 11:59 PM CDT | Severe Thunderstorm Warning | TSA | Rogers, Tulsa | 46 min |
| Apr 19, 11:59 PM CDT | Severe Thunderstorm Warning | TSA | Creek | 46 min |
| Apr 20, 12:01 AM CDT | Severe Thunderstorm Warning | TSA | Craig, Ottawa | 59 min |
| Apr 20, 12:17 AM CDT | Severe Thunderstorm Warning | TSA | Cherokee, Mayes, Muskogee | 58 min |
| Apr 20, 12:40 AM CDT | Severe Thunderstorm Warning | TSA | Haskell, Muskogee, Sequoyah | 65 min |
| Apr 20, 12:44 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Delaware | 46 min |
| Apr 20, 1:21 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Sequoyah | 54 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.