Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 273, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jun 28, 2001, 8:13 AM CDT for Tulsa County, Oklahoma. It was in force for 47 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
- Jun 28, 2001, 8:13 AM CDT (13:13 UTC)
- Expired
- Jun 28, 2001, 9:00 AM CDT
- In force
- 47 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Tulsa County, OK
The radar
The Tulsa radar (KINX), 32 km from the middle of the area, began a volume at 13:12 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 |
|---|---|---|---|
| Jun 28, 8:20 AM CDT | Hail 0.75 | Collinsville, 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 nearest sounding before it
Lamont, OK (KLMN), launched 12:00Z, 1.2 hours before the alert went out and 148 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
- 723 J/kg
- Mixed-layer CIN
- -242 J/kg
- Mixed-layer LCL
- 1309 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 231 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.3
The text
As transmitted, in the capitals the NWS used until 2016.
939 WUUS54 KTSA 281313 SVRTUL OKC143-281400- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 813 AM CDT THU JUN 28 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN TULSA COUNTY IN NORTHEAST OKLAHOMA * UNTIL 900 AM CDT * AT 813 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER COLLINSVILLE...MOVING SOUTH AT 15 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...COLLINSVILLE AND OWASSO. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. LAT...LON 3645 9584 3642 9595 3614 9591 3615 9581
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 Jun 28, 5:30 AM CDT, 2 hours 43 minutes earlier.
Area forecast discussion, Jun 28, 5:30 AM CDT, 2 hours 43 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 530 AM CDT THU JUN 28 2001 SCATTERED SHOWERS DEVELOPING IN A BAND BETWEEN BVO AND MLC AND ALSO NEAR MO BORDER. UPDATED ZONES TO UP POPS TO LIKELY FROM MLC SOUTH AND WORDED AS SCT SHOWERS/THUNDERSTORMS ELSEWHERE. DONT EXPECT MORNING PCP TO LAST TO LONG WITH SCT AFTERNOON CONVECTION STILL LOOKING LIKE A GOOD BET MAINLY IN E/S ZONES. UPDATED ZFP/RDF OUT. /13 .TSA... AR...NONE. OK...NONE.
In the hours before
Special weather statement, Jun 28, 6:00 AM CDT, 2 hours 13 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-291100- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 600 AM CDT THU JUN 28 2001 ...ISOLATED SEVERE THUNDERSTORMS LIKELY ACROSS EASTERN OKLAHOMA AND NORTHWEST ARKANSAS TODAY AND TONIGHT... UPPER LEVEL LOW PRESSURE WILL CONTINUE MOVING SLOWLY SOUTHWESTWARD TODAY ACROSS SOUTHERN MISSOURI. SHOWERS AND THUNDERSTORMS HAVE ALREADY DEVELOPED THIS MORNING ACROSS PORTIONS OF EASTERN OKLAHOMA. SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH THE MORNING HOURS ACROSS THIS AREA. THESE STORMS WILL BE CAPABLE OF PRODUCING HAIL TO THE SIZE OF DIMES AND VERY HEAVY RAIN. ISOLATED SEVERE THUNDERSTORMS ARE LIKELY THIS AFTERNOON AND EVENING ACROSS ALL OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS. THESE STORMS WILL BE CAPABLE OF PRODUCING HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 65 MPH. AS THE LOW LEVEL JET STRENGTHENS TONIGHT...SCATTERED THUNDERSTORMS WILL AGAIN DEVELOP ACROSS EASTERN OKLAHOMA. SOME OF THESE STORMS COULD BRIEFLY REACH SEVERE LIMITS...PRODUCING DIME SIZE HAIL AND VERY HEAVY RAIN. BECAUSE THESE STORMS MAY DEVELOP INTO A CONVECTIVE BAND AND MOVE OVER THE SAME AREAS OVERNIGHT...LOCALIZED FLOODING WILL BE POSSIBLE. .DAY TWO...ISOLATED SEVERE THUNDERSTORMS ARE AGAIN EXPECTED ON FRIDAY OVER EASTERN OKLAHOMA AND NORTHWEST ARKANSAS AS THE UPPER LEVEL LOW PRESSURE SYSTEM MOVES SLOWLY SOUTHWEST INTO THE AREA. .SPOTTER ACTIVATION... ACTIVATION OF STORM SPOTTERS MAY BE NECESSARY ACROSS PORTIONS OF EASTERN OKLAHOMA AND NORTHWEST ARKANSAS BEGINNING THIS MORNING. .DISCUSSION... LIFTED INDICES ACROSS EASTERN OKLAHOMA THIS MORNING RANGE FROM -2 TO -4 DEGREE C. ALTHOUGH INSTABILITIES ARE MARGINAL...A FEW STORMS THIS MORNING MAY BRIEFLY REACH SEVERE LIMITS...PRODUCING DIME SIZE HAIL. AN UPPER LEVEL LOW PRESSURE SYSTEM WILL CONTINUE TO DRIFT SLOWLY SOUTHWESTWARD THIS AFTERNOON. COOLER TEMPERATURES ALOFT ASSOCIATED WITH UPPER LOW...COMBINED WITH SURFACE HEATING WILL CREATE A MODERATELY UNSTABLE ATMOSPHERE BY EARLY AFTERNOON WITH CAPE VALUES IN THE 2000-2500 J/KG RANGE. THERMODYNAMIC PROFILES/SHEAR PROFILES SUPPORT LARGE HAIL AND DAMAGING WINDS WITH THE STRONGER CELLS. SHOWERS AND THUNDERSTORMS ARE AGAIN EXPECTED TO DEVELOP OVER EASTERN OKLAHOMA TONIGHT WHERE STRONG ISENTROPIC LIFT WILL BE PRESENT. DIME SIZE HAIL AND VERY HEAVY RAIN WILL BE THE PRIMARILY THREAT WITH ANY SEVERE STORMS THAT DEVELOP. IN ADDITION IF STORMS MOVE OVER THE SAME AREAS...LOCALIZED FLOODING WILL LIKELY OCCUR. THREAT TABLE VALID THROUGH 1100 UTC FRIDAY AREA 1...EASTERN OKLAHOMA AND NORTHWEST ARKANSAS THUNDERSTORM PROBABILITY...100 SEVERE PROBABILITY IF STORMS OCCUR...80 SIGNIFICANT SEVERE PROBABILITY IF STORMS OCCUR...05 THREAT AREAS DEFINE THE GREATEST RISK. PROBABILITIES ARE IN PERCENT. SIGNIFICANT SEVERE IS DEFINED AS F1 OR GREATER WIND/TORNADO DAMAGE AND/OR GOLF BALL SIZE HAIL OR LARGER. RELATED GRAPHICAL INFORMATION CAN BE FOUND AT:WWW.SRH.NOAA.GOV/TULSA AN UPDATED HAZARDOUS WEATHER OUTLOOK WILL BE ISSUED AROUND 100 PM CDT TODAY.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 28, 1:43 AM CDT | Severe Thunderstorm Warning | TSA | Okfuskee | 62 min |
| Jun 28, 7:27 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 48 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2001Every severe thunderstorm warning in 2001
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.