Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 454, NWS Tulsa, OK

October 5, 1998Delaware County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Oct 5, 1998, 3:34 AM CDT for Delaware County, Oklahoma. It was in force for 26 min. 3 reports 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
Oct 5, 1998, 3:34 AM CDT (08:34 UTC)
Expired
Oct 5, 1998, 4:00 AM CDT
In force
26 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Delaware County, OK

The radar

The Tulsa radar (KINX), 73 km from the middle of the area, began a volume at 08:34 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
Oct 5, 3:45 AM CDTThunderstorm WindLeach, OKPower lines were blown down along the Mayes/Delaware County line.
Oct 5, 3:55 AM CDTThunderstorm WindKansas, OKThe roof was blown off of a tool shed.
Oct 5, 4:00 AM CDTThunderstorm WindColcord, OKThe porch roof and skirting of a mobile home were blown away.

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.

IssuedProductOfficeLasted
Oct 4, 11:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Springfield, MO (KSGF), launched 00:00Z, 8.6 hours before the alert went out and 105 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, Springfield, MO at 00:00Z on 1998-10-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1811 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, Springfield, MO at 00:00Z on 1998-10-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 236 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
1811 J/kg
Mixed-layer CIN
-52 J/kg
Mixed-layer LCL
918 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
236 m²/s²
0-3 km storm-relative helicity
352 m²/s²
Significant tornado parameter
2.7
Supercell composite
19.4

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 Oct 4, 8:15 PM CDT, 7 hours 19 minutes earlier.

Area forecast discussion, Oct 4, 8:15 PM CDT, 7 hours 19 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
815 PM CDT SUN OCT 4 1998

ISSUED FLASH FLOOD WATCH FOR NORTHEAST OKLAHOMA OVERNIGHT
WITH CELLS TRAINING AND IR SAT PICS INDICATING CONTINUED
BACKBUILDING POSSIBLE OVERNIGHT AS UPPER JET PIVOTS INTO
SOUTHERN PLAINS. UPPED POPS TO 100% IN WATCH AREA AND ALSO
UPPED POPS ELSEWHERE. FRONT IN NW KANSAS IS NOT
COMING SOUTHEAST VERY QUICKLY AND MAY MEAN HEAVY RAIN
THREAT WILL CONTINUE INTO MONDAY OVER MUCH OF THE AREA.
ENTIRE FORECAST AREA UNDER TORNADO WATCH UNTIL 1AM BUT
AM NOT SURE FAR SOUTHEAST ZONES WILL SEE PRECIP UNTIL
MONDAY MORNING...SO LEFT CHANCE POPS NEAR RED RIVER
OVERNIGHT. NO OTR CHANGES. ZONES AND FFA HAVE BEEN
ISSUED.

FCSTID = 13

.TUL...
OK...FLASH FLOOD WATCH FOR TONIGHT FOR ZONES OKZ054>067.

AR...NONE.

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 4, 7:00 PM CDTTornado WarningTSAPawnee45 min
Oct 4, 7:35 PM CDTTornado WarningTSAOsage, Pawnee40 min
Oct 4, 8:12 PM CDTTornado WarningTSAOsage48 min
Oct 4, 8:20 PM CDTTornado WarningTSAPawnee25 min
Oct 4, 8:30 PM CDTTornado WarningTSACreek45 min
Oct 4, 8:39 PM CDTTornado WarningTSAOsage, Pawnee51 min
Oct 4, 9:01 PM CDTSevere Thunderstorm WarningTSATulsa, Washington29 min
Oct 4, 9:11 PM CDTFlash Flood WarningTSAOsage, Pawnee3 hr
Oct 4, 9:11 PM CDTSevere Thunderstorm WarningTSANowata, Rogers34 min
Oct 4, 9:27 PM CDTTornado WarningTSAOsage, Pawnee33 min
Oct 4, 9:40 PM CDTTornado WarningTSACreek, Okfuskee50 min
Oct 4, 9:49 PM CDTSevere Thunderstorm WarningTSACraig, Nowata, Rogers56 min
Oct 4, 9:54 PM CDTSevere Thunderstorm WarningTSAOsage36 min
Oct 4, 10:02 PM CDTTornado WarningTSATulsa, Washington43 min
Oct 4, 10:11 PM CDTTornado WarningTSACraig, Nowata49 min
Oct 4, 10:26 PM CDTTornado WarningTSARogers34 min
Oct 4, 10:27 PM CDTTornado WarningTSAOkfuskee48 min
Oct 4, 10:36 PM CDTTornado WarningTSATulsa, Washington39 min
Oct 4, 10:45 PM CDTSevere Thunderstorm WarningTSACreek, Okmulgee45 min
Oct 4, 10:49 PM CDTTornado WarningTSACreek, Okmulgee41 min
Oct 4, 10:56 PM CDTTornado WarningTSARogers34 min
Oct 4, 11:07 PM CDTTornado WarningTSAOkfuskee38 min
Oct 4, 11:24 PM CDTSevere Thunderstorm WarningTSACraig36 min
Oct 4, 11:24 PM CDTTornado WarningTSAMuskogee, Okmulgee51 min
Oct 4, 11:52 PM CDTFlash Flood WarningTSAOsage, Pawnee2 hr
Oct 4, 11:54 PM CDTSevere Thunderstorm WarningTSATulsa, Wagoner51 min
Oct 5, 12:03 AM CDTSevere Thunderstorm WarningTSACreek, Okfuskee, Okmulgee42 min
Oct 5, 12:10 AM CDTSevere Thunderstorm WarningTSAMcIntosh, Muskogee, Wagoner50 min
Oct 5, 12:11 AM CDTFlash Flood WarningTSANowata, Washington2 hr
Oct 5, 12:11 AM CDTFlash Flood WarningTSATulsa2 hr
Oct 5, 12:16 AM CDTTornado WarningTSAMuskogee, Wagoner29 min
Oct 5, 12:29 AM CDTTornado WarningTSACherokee46 min
Oct 5, 12:35 AM CDTFlash Flood WarningTSACreek, Okmulgee115 min
Oct 5, 12:38 AM CDTSevere Thunderstorm WarningTSACreek, Okmulgee52 min
Oct 5, 12:56 AM CDTSevere Thunderstorm WarningTSAAdair, Cherokee, Delaware49 min
Oct 5, 1:08 AM CDTSevere Thunderstorm WarningTSACraig37 min
Oct 5, 1:09 AM CDTSevere Thunderstorm WarningTSAMuskogee, Wagoner51 min
Oct 5, 1:36 AM CDTSevere Thunderstorm WarningTSAOttawa39 min
Oct 5, 1:49 AM CDTSevere Thunderstorm WarningTSAAdair, Cherokee, Delaware41 min
Oct 5, 2:01 AM CDTFlash Flood WarningTSACherokee, Craig, Delaware, Mayes, Ottawa3 hr
Oct 5, 2:01 AM CDTFlash Flood WarningTSACreek, Okmulgee, Osage, Pawnee, Rogers, Tulsa and 2 more3 hr
Oct 5, 2:01 AM CDTFlash Flood WarningTSAMuskogee3 hr
Oct 5, 2:01 AM CDTFlash Flood WarningTSANowata3 hr
Oct 5, 3:56 AM CDTSevere Thunderstorm WarningTSADelaware49 min
Oct 5, 4:35 AM CDTFlash Flood WarningTSACherokee, Craig, Delaware, Mayes, Ottawa3 hr
Oct 5, 4:35 AM CDTFlash Flood WarningTSACreek, Osage, Pawnee, Tulsa3 hr
Oct 5, 4:35 AM CDTFlash Flood WarningTSANowata, Rogers, Washington3 hr
Oct 5, 4:35 AM CDTFlash Flood WarningTSAWagoner3 hr
Oct 5, 7:55 AM CDTFlash Flood WarningTSACherokee, Mayes, Muskogee, Okmulgee, Rogers, Tulsa and 1 more3 hr
Oct 5, 7:55 AM CDTFlash Flood WarningTSACreek, Okfuskee3 hr
Oct 5, 7:55 AM CDTFlash Flood WarningTSACraig, Delaware, Ottawa3 hr
Oct 5, 7:55 AM CDTFlash Flood WarningTSAAdair3 hr
Oct 5, 10:53 AM CDTFlash Flood WarningTSAHaskell, McIntosh, Pittsburg3 hr
Oct 5, 10:53 AM CDTFlash Flood WarningTSAAdair, Cherokee, Delaware, Muskogee, Sequoyah3 hr
Oct 5, 1:45 PM CDTFlash Flood WarningTSALatimer, Pushmataha3 hr
Oct 5, 1:45 PM CDTFlash Flood WarningTSAHaskell3 hr
Oct 5, 1:46 PM CDTFlash Flood WarningTSAPushmataha3 hr
Oct 5, 1:49 PM CDTFlash Flood WarningTSAAdair3 hr
Oct 5, 1:59 PM CDTFlash Flood WarningTSALeFlore, Sequoyah3 hr
Oct 5, 2:09 PM CDTSevere Thunderstorm WarningTSAPushmataha61 min
Oct 5, 2:45 PM CDTFlash Flood WarningTSALeFlore, Sequoyah2 hr
Oct 5, 3:15 PM CDTFlash Flood WarningTSALeFlore3 hr
Oct 5, 4:20 PM CDTSevere Thunderstorm WarningTSALeFlore25 min
Oct 5, 5:42 PM CDTSevere Thunderstorm WarningTSAHaskell, LeFlore, Sequoyah33 min
Oct 5, 2:12 AM CDTSevere Thunderstorm WarningTSABenton48 min
Oct 5, 2:56 AM CDTSevere Thunderstorm WarningTSABenton49 min
Oct 5, 4:07 AM CDTTornado WarningTSABenton23 min
Oct 5, 10:53 AM CDTFlash Flood WarningTSABenton, Washington3 hr
Oct 5, 2:13 PM CDTSevere Thunderstorm WarningTSACrawford32 min
Oct 5, 2:24 PM CDTSevere Thunderstorm WarningTSAMadison, Washington66 min
Oct 5, 3:15 PM CDTFlash Flood WarningTSACarroll, Madison3 hr
Oct 5, 3:24 PM CDTSevere Thunderstorm WarningTSACarroll, Madison51 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1998Every 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.