Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 289, NWS Tulsa, OK

June 30, 2001Haskell County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 30, 2001, 12:41 AM CDT for Haskell County, Oklahoma. It was in force for 64 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 30, 2001, 12:41 AM CDT (05:41 UTC)
Expired
Jun 30, 2001, 1:45 AM CDT
In force
64 min
Issued by
NWS Tulsa, OK
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Haskell County, OK

The radar

The Western Arkansas radar (KSRX), 69 km from the middle of the area, began a volume at 05:41 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 30, 12:55 AM CDTThunderstorm Wind 61 EKeota, 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

Norman, OK (KOUN), launched 00:00Z, 5.7 hours before the alert went out and 207 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, Norman, OK at 00:00Z on 2001-06-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1853 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, Norman, OK at 00:00Z on 2001-06-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 65 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
1853 J/kg
Mixed-layer CIN
-79 J/kg
Mixed-layer LCL
1446 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
65 m²/s²
0-3 km storm-relative helicity
227 m²/s²
Significant tornado parameter
0.6
Supercell composite
7.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WUUS54 KTSA 300542
SVRTUL
OKC061-300645-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1241 AM CDT SAT JUN 30 2001

THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  HASKELL COUNTY IN SOUTHEAST OKLAHOMA

* UNTIL 145 AM CDT

* AT 1239 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 
NEAR HOYT...MOVING SOUTH AT 10 MPH. ANOTHER SEVERE STORM WAS NEAR 
WEBBERS FALLS...AND A THIRD SEVERE STORM WAS NEAR KEOTA. BOTH STORMS 
WERE MOVING SOUTH AROUND 10 MPH. 

* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...TAMAHA...
  KEOTA...WHITEFIELD...ENTERPRISE...MC CURTAIN...KINTA...LEQUIRE AND
  STIGLER.

HAIL TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO 60 MPH CAN BE 
EXPECTED IN THE WARNED AREA.

THIS IS A DANGEROUS STORM. IF YOU ARE NEAR ITS PATH YOU SHOULD 
PREPARE FOR VERY LARGE HAIL. SEEK SHELTER IN A STURDY BUILDING AND 
STAY AWAY FROM WINDOWS


LAT...LON 3546 9504 3529 9521 3532 9546 3507 9534
          3508 9493 3534 9481

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 29, 9:30 PM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, Jun 29, 9:30 PM CDT, 3 hours 11 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE TULSA OK
930 PM CDT FRI JUN 29 2001

A FEW SHOWERS WHERE NOTED OVER NW AR AND FAR SE OK...OTHERWISE ALL
IS QUIET ACROSS THE FORECAST AREA SO FAR THIS EVENING.

GOOD WAA PATTERN NOTED ACROSS ERN OK ON H85 ANALYSIS...ALONG WITH INFLUX
OF +14-15C DEWPOINTS.  00Z MESOETA STILL SUGGESTS THAT STRONG
ISENTROPIC LIFT WILL DEVELOP OVER THE NEXT FEW HOURS...WHICH IS BEST
DEPICTED BY UPGLIDE ALONG 305K SURFACE.  ZONE OF BEST LIFT IS A BIT
FARTHER W THAN 18Z MESOETA...ALTHO PRESSURE CONDENSATION DEFICITS
ARE RATHER LOW IN ERN OK...SO NOT MUCH LIFT WILL NEEDED FOR
DEVELOPMENT.

1 TO 3 HOUR FFG VALUES ACROSS THE BULK OF ERN OK RUNNING AROUND 1.5
TO 2.5 RESPECTIVELY...WITH MUCH HIGHER VALUES IN NW AR AND FAR ERN
OK.  GIVEN THE EXCESSIVE RAIN OVER THE PAST FEW DAYS...CURRENT FLASH
FLOOD WATCH LOOKS GOOD.

WILL UPDATE TO ADJUST TEMPORAL WORDING...AND MAY TWEAK POPS IN A FEW
LOCATIONS.

FCSTID = 18

.TSA...
AR...NONE.
OK...FLASH FLOOD WATCH FOR THIS EVENING THROUGH SATURDAY MORNING FOR
ZONES OKZ049...OKZ053...OKZ060>062...OKZ064>068...OKZ070>076.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 12:11 AM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee49 min
Jun 30, 12:45 AM CDTSevere Thunderstorm WarningTSAPawnee60 min
Jun 30, 12:58 AM CDTSevere Thunderstorm WarningTSALeFlore62 min
Jun 30, 1:04 AM CDTSevere Thunderstorm WarningTSAMcIntosh36 min
Jun 30, 1:37 AM CDTSevere Thunderstorm WarningTSAMuskogee68 min
Jun 30, 1:41 AM CDTSevere Thunderstorm WarningTSAMcIntosh64 min
Jun 30, 2:11 AM CDTSevere Thunderstorm WarningTSAPittsburg64 min
Jun 30, 2:15 AM CDTFlash Flood WarningTSAHaskell, McIntosh2 hr
Jun 30, 2:22 AM CDTSevere Thunderstorm WarningTSAHaskell53 min
Jun 30, 2:35 AM CDTSevere Thunderstorm WarningTSAPushmataha55 min
Jun 30, 2:49 AM CDTSevere Thunderstorm WarningTSALeFlore56 min
Jun 30, 2:59 AM CDTFlash Flood WarningTSAPittsburg2 hr
Jun 30, 3:17 AM CDTSevere Thunderstorm WarningTSAPittsburg58 min
Jun 30, 4:17 AM CDTSevere Thunderstorm WarningTSAPittsburg43 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.