Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 168, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 8, 2000, 11:45 PM CDT for Osage County, Oklahoma. It was in force for 60 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, 11:45 PM CDT (04:45 UTC)
- Expired
- May 9, 2000, 12:45 AM CDT
- In force
- 60 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Osage County, OK
The radar
The Tulsa radar (KINX), 94 km from the middle of the area, began a volume at 04:46 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, 12:00 AM CDT | Hail 1.75 | Pawhuska, OK | Golfball size hail fell at Osage Hills State Park damaging a camper. |
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
Norman, OK (KOUN), launched 00:00Z, 4.8 hours before the alert went out and 206 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
- 2944 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 1417 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 209 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 12.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 090448 SVRTUL OKC113-090545- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1145 PM CDT MON MAY 8 2000 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN OSAGE COUNTY IN NORTHEAST OKLAHOMA * UNTIL 1245 AM CDT * AT 1145 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF SEVERE THUNDERSTORMS 6 MILES SOUTH OF BIGHEART...MOVING EAST AT 35 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...HULAH...BIGHEART AND OKESA HAIL TO THE SIZE OF GOLFBALLS 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 3699 9640 3655 9638 3658 9602 3700 9601
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 15 minutes earlier.
Area forecast discussion, May 8, 10:30 PM CDT, 1 hour 15 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, 8:43 PM CDT, 3 hours 2 minutes before
OKZ054>062-064>067-090243- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 843 PM CDT MON MAY 8 2000 ...UPDATE FOR SHORT-TERM TRENDS... THUNDERSTORMS SPREADING ACROSS OSAGE COUNTY WILL CONTINUE TO APPROACH THE STALLED FRONT WHICH AT 8PM EXTENDED FROM NORTHERN CRAIG COUNTY...ACROSS NORTHERN TULSA COUNTY AND INTO CREEK COUNTY. AS THESE STORM APPROACH THE FRONT THEY WILL BECOME MORE SURFACED BASED IN NATURE AND BEGIN TO TAP THE WARM AND HUMID SURFACE AIR. AS THIS OCCURS THE STORMS MAY TAKE ON SUPERCELL CHARACTERISTICS. IN ADDITION...NEW STORMS MAY DEVELOP ALONG THE FRONT. IF THESE STORMS FORM THEY COULD BECOME SUPERCELLS AS WELL.
Special weather statement, May 8, 11:00 PM CDT, 45 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, 8 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 MUSKOGEELocal storm report, May 8, 11:39 PM CDT, 6 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 OSAGELocal storm report, May 8, 11:40 PM CDT, 5 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 WASHINGTONLocal storm report, May 8, 11:44 PM CDT, 1 minute 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 OSAGEThe 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, 11:56 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 49 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, 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.