Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 397, NWS Norman, OK

June 19, 1998Caddo County, Oklahoma

NWS Norman, OK issued this severe thunderstorm warning at Jun 19, 1998, 7:12 PM CDT for Caddo County, Oklahoma. It was in force for 48 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 19, 1998, 7:12 PM CDT (00:12 UTC)
Expired: Jun 19, 1998, 8:00 PM CDT
In force: 48 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Caddo County, OK

The radar

The Norman radar (KTLX), 101 km from the middle of the area, began a volume at 00:14 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 19, 7:43 PM CDT	Hail 1.75	Eakly, 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jun 19, 5:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 0.2 hours before the alert went out and 89 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: 4897 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 1529 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 33 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 1.0
Supercell composite: 10.6

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 Norman, OK wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 19, 3:30 PM CDT, 3 hours 42 minutes earlier.

Area forecast discussion, Jun 19, 3:30 PM CDT, 3 hours 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE NORMAN OK
330 PM CDT FRI JUN 19 1998

CU BUBBLING ACROSS WRN ZONES ATTM.  SUSPECT THAT WEAK BOUNDARIES
STILL LINGER AND WITH ADAS CAPES >= 3000 J/KG ACROSS MUCH OF
FA...CANNOT RULE OUT ISOLATED CONVECTION THIS EVENING.  UPPER RIDGE
TRIES TO BUILD IN OVER THE WEEKEND.  BUT FA REMAINS LARGELY ON THE
EDGE OF THE RIDGE WITH SHORT WAVES MOVING THROUGH RELATIVELY ZONAL
FLOW.  WILL LEAVE LOW POPS THROUGH MONDAY.  BY TUESDAY RIDGE SHOULD
BE STRONG ENOUGH TO INHIBIT CONVECTION.

FCSTID = 10
OKC   74  99  74  94 /  20  20  20  20
HBR   73 101  73  94 /  20  20  20  20
SPS   74 105  73  95 /  20  20  20  20
GAG   70 100  67  93 /  20  20  20  20
PNC   74  99  73  94 /  20  20  20  20
DUA   75  99  74  95 /  20  20  20  20

.OUN...
OK...NONE.
TX...NONE.

In the hours before

Local storm report, Jun 19, 6:19 PM CDT, 53 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
619 PM CDT FRI JUN 19 1998

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

0552 PM    1 N ENID                  OK   2.75 INCH HAIL
06/19/98   GARFIELD

TL

Local storm report, Jun 19, 6:19 PM CDT, 53 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
619 PM CDT FRI JUN 19 1998

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

0552 PM    1 N ENID                  OK   2.75 INCH HAIL
06/19/98   GARFIELD

TL

Local storm report, Jun 19, 6:43 PM CDT, 29 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
643 PM CDT FRI JUN 19 1998

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

0540 PM    1 W ENID                  OK   1.75 INCH HAIL
06/19/98   GARFIELD

0602 PM    LAKE KEMP                 TX   .75 INCH HAIL
06/19/98   BAYLOR

0605 PM    LAKE KEMP                 TX   1.00 INCH HAIL
06/19/98   BAYLOR

0613 PM    9E DAVIDSON               OK   .85 INCH HAIL
06/19/98   TILLMAN

0642 PM    CHATTANOOGA               OK   1.00 INCH HAIL
06/19/98   TILLMAN

0547 PM    8 N MABELE                TX   .75 INCH HAIL
06/19/98   BAYLOR

CW

Local storm report, Jun 19, 6:43 PM CDT, 29 minutes before

LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NORMAN OK
643 PM CDT FRI JUN 19 1998

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

0540 PM    1 W ENID                  OK   1.75 INCH HAIL
06/19/98   GARFIELD

0602 PM    LAKE KEMP                 TX   .75 INCH HAIL
06/19/98   BAYLOR

0605 PM    LAKE KEMP                 TX   1.00 INCH HAIL
06/19/98   BAYLOR

0613 PM    9E DAVIDSON               OK   .85 INCH HAIL
06/19/98   TILLMAN

0642 PM    CHATTANOOGA               OK   1.00 INCH HAIL
06/19/98   TILLMAN

0547 PM    8 N MABELE                TX   .75 INCH HAIL
06/19/98   BAYLOR

CW

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 19, 7:27 PM CDT	Tornado Warning	OUN	Garfield	33 min
Jun 19, 7:29 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Grady, Stephens	46 min
Jun 19, 7:31 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Washita	44 min
Jun 19, 7:51 PM CDT	Flash Flood Warning	OUN	Garfield	114 min
Jun 19, 7:57 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	48 min
Jun 19, 8:04 PM CDT	Severe Thunderstorm Warning	OUN	Caddo, Canadian, Grady	41 min
Jun 19, 8:15 PM CDT	Tornado Warning	OUN	Caddo	30 min
Jun 19, 8:24 PM CDT	Tornado Warning	OUN	Garfield	36 min
Jun 19, 8:45 PM CDT	Tornado Warning	OUN	Caddo, Grady	30 min
Jun 19, 8:48 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Caddo, Canadian	42 min
Jun 19, 8:53 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Noble	37 min
Jun 19, 9:30 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian	45 min
Jun 19, 10:06 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	39 min
Jun 20, 5:15 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	45 min
Jun 20, 5:35 PM CDT	Severe Thunderstorm Warning	OUN	Garfield, Kingfisher	40 min
Jun 20, 5:59 PM CDT	Severe Thunderstorm Warning	OUN	Blaine, Canadian	46 min
Jun 20, 6:03 PM CDT	Severe Thunderstorm Warning	OUN	Comanche, Kiowa	42 min
Jun 20, 6:14 PM CDT	Severe Thunderstorm Warning	OUN	Garfield	46 min
Jun 20, 6:17 PM CDT	Severe Thunderstorm Warning	OUN	Caddo	43 min
Jun 20, 6:37 PM CDT	Severe Thunderstorm Warning	OUN	Kingfisher	53 min
Jun 20, 6:44 PM CDT	Severe Thunderstorm Warning	OUN	Blaine	46 min
Jun 20, 6:54 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	51 min
Jun 20, 6:58 PM CDT	Tornado Warning	OUN	Kingfisher	32 min
Jun 20, 6:59 PM CDT	Severe Thunderstorm Warning	OUN	Canadian	46 min
Jun 19, 7:24 PM CDT	Flash Flood Warning	OUN	Baylor	3 hr
Jun 19, 7:40 PM CDT	Severe Thunderstorm Warning	OUN	Baylor	60 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1998 Every severe thunderstorm warning in 1998

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.