Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1993
Severe Thunderstorm Warning 71, NWS Norman, OK
NWS Norman, OK issued this severe thunderstorm warning at Apr 24, 1993, 10:50 PM CDT for Johnston County, Murray County, Pontotoc County, Oklahoma. It was in force for 40 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
- Apr 24, 1993, 10:50 PM CDT (03:50 UTC)
- Expired
- Apr 24, 1993, 11:30 PM CDT
- In force
- 40 min
- Issued by
- NWS Norman, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Johnston County, OK, Murray County, OK, Pontotoc County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 24, 11:35 PM CDT | Tornado F0 | Wapanucka, 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. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 3.8 hours before the alert went out and 96 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.
- Mixed-layer CAPE
- 829 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 1474 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 3.2
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 Apr 24, 9:35 PM CDT, 1 hour 15 minutes earlier.
Area forecast discussion, Apr 24, 9:35 PM CDT, 1 hour 15 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 920 PM CDT SAT APR 24 1993 TSTMS DVLPD DURG LATE AFTN BUT MOST REMAINED EAST OF FCST AREA. SOME HAVE CONTD TO DVLP OVR SRN PTNS AREA OVR S CENT OK. HV RMVD MENTION OF PCPN OVR MOST SXNS XCPT S CENT AND SERN OK AND OVR XTRM ERN PTNS OF CLAY CO IN N TX. WL ADJUST TEMPS SLGTLY TO REFLECT CURRENT CONDS AND WNDS HV BCM NLY OVR MOST SXNS XCPT S CENT AND SE. OTRW...LTL CHG TO RMNDR OF FCST. 10 .OK...NONE. .TX...NONE.
In the hours before
Special weather statement, Apr 24, 6:05 PM CDT, 4 hours 45 minutes before
OKZ004>021-TXZ076-TXZ077-250200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 555 PM CDT SAT APR 24 1
Special weather statement, Apr 24, 6:05 PM CDT, 4 hours 45 minutes before
OKZ004>021-TXZ076-TXZ077-250200- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE OKLAHOMA CITY OK 555 PM CDT SAT APR 24 1
The office that day
Everything else NWS Norman, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 10:25 PM CDT | Severe Thunderstorm Warning | OUN | Hughes, Pontotoc | 35 min |
| Apr 24, 10:38 PM CDT | Severe Thunderstorm Warning | OUN | Coal | 52 min |
| Apr 24, 10:53 PM CDT | Tornado Warning | OUN | Coal | 7 min |
| Apr 24, 11:26 PM CDT | Severe Thunderstorm Warning | OUN | Atoka, Coal, Johnston | 64 min |
| Apr 24, 11:32 PM CDT | Tornado Warning | OUN | Johnston | 28 min |
| Apr 25, 12:10 AM CDT | Severe Thunderstorm Warning | OUN | Atoka, Pushmataha | 50 min |
| Apr 25, 12:56 AM CDT | Severe Thunderstorm Warning | OUN | Pushmataha | 64 min |
| Apr 25, 2:56 AM CDT | Severe Thunderstorm Warning | OUN | Pontotoc, Seminole | 49 min |
| Apr 25, 5:04 AM CDT | Severe Thunderstorm Warning | OUN | Coal | 41 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1993Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.