Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 273, NWS Tulsa, OK

June 28, 2001Tulsa County, Oklahoma

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

TimeReportWhereRemark
Jun 28, 8:20 AM CDTHail 0.75Collinsville, 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.

Skew-T log-pSkew-T log-p diagram, Lamont, OK at 12:00Z on 2001-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 723 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, Lamont, OK at 12:00Z on 2001-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 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
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

Open this sounding in Storm Lab

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.

IssuedProductOfficeCountiesLasted
Jun 28, 1:43 AM CDTSevere Thunderstorm WarningTSAOkfuskee62 min
Jun 28, 7:27 AM CDTSevere Thunderstorm WarningTSAOsage48 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.