Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 392, NWS Tulsa, OK

June 30, 1999Creek County, Okfuskee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Jun 30, 1999, 5:20 AM CDT for Creek County, Okfuskee County, Oklahoma. It was in force for 25 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 30, 1999, 5:20 AM CDT (10:20 UTC)
Expired: Jun 30, 1999, 5:45 AM CDT
In force: 25 min
Issued by: NWS Tulsa, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Creek County, OK, Okfuskee County, OK

The radar

The Tulsa radar (KINX), 89 km from the middle of the area, began a volume at 10:24 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 30, 5:45 AM CDT	Thunderstorm Wind	Pharoah, OK	Several 10-inch diameter tree limbs were blown down.

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, 10.3 hours before the alert went out and 108 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 567 J/kg
Mixed-layer CIN: -317 J/kg
Mixed-layer LCL: 1460 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 119 m²/s²
0-3 km storm-relative helicity: 254 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 30, 5:10 AM CDT, 10 minutes earlier.

Area forecast discussion, Jun 30, 5:10 AM CDT, 10 minutes before

EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
510 AM CDT WED JUN 30 1999

BUSY ALL NIGHT WITH ONGOING WEATHER SO NOT A LOT OF TIME TO LOOK AT
THINGS OR TO WRITE A DISCUSSION.

WAS GOING TO ISSUE A FLASH FLOOD WATCH FOR TODAY AND POSSIBLY TONIGHT
IN NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS BUT CURRENT CONVECTION
NOW MAKING DECENT PROGRESS TO THE SOUTH SO DECIDED TO HOLD OFF FOR
NOW. WILL WAIT TO SEE HOW THINGS EVOLVE THE NEXT FEW HOURS BUT MAY
YET NEED A WATCH SOMEWHERE...THE BIG QUESTION IS JUST WHERE.

SEVERAL MESOSCALE CONVECTIVE COMPLEXES WILL LIKELY AFFECT THE AREA
DURING THE NEXT 24 TO 36 HOURS BEFORE MID LEVEL WARMING CAPS THINGS
OFF. WENT WAY ABOVE GUIDANCE POPS AND COOLER THAN GUIDANCE ON
TEMPERATURES ALTHOUGH DO EXPECT SOME WARMUP THURSDAY WITH MORE
SUNSHINE RETURNING BY AFTERNOON.

HAD NO TIME TO LOOK AT EXTENDED SO LITTLE OR NO CHANGES MADE THERE.

THANKS TO CHUCK IN SPRINGFIELD AND GREG IN LITTLE ROCK FOR
COORDINATION.

FCSTID = 5
TUL   80  70  87  72 /  80  70  50  40
FSM   82  72  90  73 /  70  40  30  20
MLC   82  73  90  74 /  70  40  30  20
BVO   80  70  87  72 /  70  70  50  40
FYV   80  70  85  70 /  80  70  50  40
IDB   88  72  91  73 /  50  30  20  10
BYV   80  70  85  70 /  80  70  50  40
MIO   80  70  86  71 /  70  70  50  40
MKO   80  72  88  73 /  90  50  40  30
F10   80  72  88  73 /  90  50  40  30
HHW   88  73  91  74 /  50  30  20  10

.TUL...
AR...NONE.
OK...NONE.

PLATE

In the hours before

Local storm report, Jun 30, 4:20 AM CDT, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
420 AM CDT WED JUN 30 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 AM    MANNFORD                  OK    60 MPH TSTM GUST
06/29/99   CREEK                           SKYWARN SPOTTER
                                           REPORTED 60 MPH TSTM GUST

DRM

Local storm report, Jun 30, 4:20 AM CDT, 1 hour before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
420 AM CDT WED JUN 30 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 AM    MANNFORD                  OK    60 MPH TSTM GUST
06/29/99   CREEK                           SKYWARN SPOTTER
                                           REPORTED 60 MPH TSTM GUST

DRM

Local storm report, Jun 30, 4:22 AM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
422 AM CDT WED JUN 30 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 AM    2 E SAPULPA               OK    75 MPH TSTM GUST
06/29/99   CREEK

Local storm report, Jun 30, 4:22 AM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
422 AM CDT WED JUN 30 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 AM    2 E SAPULPA               OK    75 MPH TSTM GUST
06/29/99   CREEK

Local storm report, Jun 30, 4:25 AM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
425 AM CDT WED JUN 30 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 AM    2 W GLENPOOL              OK    75 MPH TSTM GUST
06/29/99   TULSA

Local storm report, Jun 30, 4:25 AM CDT, 55 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
425 AM CDT WED JUN 30 1999

TIME(CDT)  .....CITY LOCATION..... STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0415 AM    2 W GLENPOOL              OK    75 MPH TSTM GUST
06/29/99   TULSA

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 3:23 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	52 min
Jun 30, 4:10 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okmulgee	50 min
Jun 30, 4:37 AM CDT	Severe Thunderstorm Warning	TSA	Tulsa	23 min
Jun 30, 4:45 AM CDT	Flash Flood Warning	TSA	Creek, Okmulgee, Tulsa	2 hr
Jun 30, 5:05 AM CDT	Severe Thunderstorm Warning	TSA	Muskogee, Okmulgee, Wagoner	40 min
Jun 30, 5:42 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Okfuskee, Okmulgee	48 min
Jun 30, 7:34 AM CDT	Severe Thunderstorm Warning	TSA	Haskell, LeFlore, Sequoyah	41 min
Jun 30, 8:10 AM CDT	Flash Flood Warning	TSA	Haskell, LeFlore	3 hr
Jun 30, 5:41 AM CDT	Flash Flood Warning	TSA	Washington	2 hr
Jun 30, 5:43 AM CDT	Flash Flood Warning	TSA	Benton, Washington	2 hr
Jun 30, 5:57 AM CDT	Flash Flood Warning	TSA	Madison	108 min
Jun 30, 8:10 AM CDT	Flash Flood Warning	TSA	Crawford, Franklin, Sebastian	3 hr

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1999 Every severe thunderstorm warning in 1999

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.