Alert archive / Oklahoma / Tornado Warnings in 1993

Tornado Warning 63, NWS Norman, OK

September 19, 1993Lincoln County, Oklahoma

NWS Norman, OK issued this tornado warning at Sep 19, 1993, 4:31 PM CDT for Lincoln County, Oklahoma. It was in force for 29 min.

The area

The counties it named.

The facts

Issued: Sep 19, 1993, 4:31 PM CDT (21:31 UTC)
Expired: Sep 19, 1993, 5:00 PM CDT
In force: 29 min
Issued by: NWS Norman, OK
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Lincoln County, OK

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.5 hours before the alert went out and 71 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: 1409 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 687 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 254 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 10.0

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 tornado 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 tornado warning went out at Sep 19, 4:02 PM CDT, 29 minutes earlier.

Area forecast discussion, Sep 19, 4:02 PM CDT, 29 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE OKLAHOMA CITY OK
330 PM CDT SUN SEP 19 1993

H/5 S/W MOVG TWD OK WITH IMPRESSIVE VORT MAX ON ALL MDLS...BUT SOME
DIFFERENCES WITH SECONDARY DVLPG BHND FIRST MAX ON RGL...WITH AVN
MAINTAINING SGNFCT DYNAMICS TO NORTH OF FCST AREA. AFTN PROFILERS INDCT
LOWR LVLS BCMG MORE SWLY TO WLY WITH WV IMAGERY INDCTG SOME DRYING ACRS
AREA AS IMPULSE MOVES BY. WL RMV MENTION OF PCPN FOR WRN ZONES...KEEPING
LOW POPS FOR CENTRAL...WITH CHANCE CAT FOR SRN PTNS. GRAD SHD BE
RELAXING AND WNDSPDS SHD DMNSH TNGT WITH SHIFT TO NORTH AS SFC LO
MOVES EWD AND NWD. WITH STG TROF MOVG BY...PCPN SHD BE ENDD BY MON
WITH TEMPS RMNG WRM WITH LTL CAA INDCTD ON CURRENT OBS. SOME
MINOR ADJSTMNT MADE TO MOS TEMPS.

OKC 61/85/66/87 2001   GAG 54/86/58/90 0001   HBR 62/86/66/88 0001
PNC 59/85/64/86 1101   SPS 64/90/67/92 0001

10

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

In the hours before

Local storm report, Sep 19, 2:57 PM CDT, 1 hour 34 minutes before

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Local storm report, Sep 19, 3:08 PM CDT, 1 hour 23 minutes before

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Local storm report, Sep 19, 3:10 PM CDT, 1 hour 21 minutes before

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Local storm report, Sep 19, 3:56 PM CDT, 35 minutes before

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Local storm report, Sep 19, 4:00 PM CDT, 31 minutes before

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Local storm report, Sep 19, 4:31 PM CDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 18, 7:45 PM CDT	Severe Thunderstorm Warning	OUN	Harper	45 min
Sep 18, 8:27 PM CDT	Severe Thunderstorm Warning	OUN	Harper	33 min
Sep 19, 2:43 PM CDT	Severe Thunderstorm Warning	OUN	Kay	47 min
Sep 19, 3:30 PM CDT	Severe Thunderstorm Warning	OUN	Kay	30 min
Sep 19, 4:05 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	40 min
Sep 19, 4:56 PM CDT	Severe Thunderstorm Warning	OUN	Lincoln	49 min
Sep 19, 6:56 PM CDT	Severe Thunderstorm Warning	OUN	Comanche	64 min

Nearby

Tornado Warnings in Oklahoma, 1993 Every tornado warning in 1993 Tornadoes in 1993

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.