Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1996

Severe Thunderstorm Warning 134, NWS Tulsa, OK

April 21, 1996Osage County, Pawnee County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 21, 1996, 4:31 PM CDT for Osage County, Pawnee County, Oklahoma. It was in force for 44 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
Apr 21, 1996, 4:31 PM CDT (21:31 UTC)
Expired
Apr 21, 1996, 5:15 PM CDT
In force
44 min
Issued by
NWS Tulsa, OK
Area
Whole counties

Counties Osage County, OK, Pawnee County, OK

The radar

The Tulsa radar (KINX), 94 km from the middle of the area, began a volume at 21:35 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
Apr 21, 4:46 PM CDTHail 0.88Pawhuska, OK
Apr 21, 4:46 PM CDTHail 0.88Pawhuska, OK
Apr 21, 5:00 PM CDTHail 0.75Pawnee, 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 nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 9.5 hours before the alert went out and 159 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, Norman, OK at 12:00Z on 1996-04-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Norman, OK at 12:00Z on 1996-04-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 267 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1941 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
267 m²/s²
0-3 km storm-relative helicity
464 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 Apr 21, 3:26 PM CDT, 1 hour 5 minutes earlier.

Area forecast discussion, Apr 21, 3:26 PM CDT, 1 hour 5 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TULSA OK
320 PM CDT SUN APR 21 1996

MID 60S DWPTS SURGED ALL THE WAY INTO NE OK THIS AFTERNOON WITH SCT
SVR STORMS NOW EXTNDING FROM N OF TUL BACK TO THE SW INTO NW TX
ALONG H85 MOIST AXIS. SVR WX AND TOR THREAT WILL CONT WELL INTO
TONIGHT WITH SFC LOW STILL OUT IN TX PH AND FNT JUST INTO NW ARK.
THREAT FOR VRY HVY RAINS WILL EXIST AS TRW CONTS TO TRAIN NE ALONG
H85 MOIST AXIS. CUD SEE SOME 4-6 INCH AMTS...BUT DIFFICULT TO
PINPOINT WHERE HEAVIEST RAINS WILL FALL AT THIS TIME. WILL ISSUE
FFA FOR ALL BUT ZN77 FOR TONIGHT WITH 90-100% POPS AND MENTION SVR
IN ALL ZNS.

ETA SLOWEST IN DRYING AREA OUT MONDAY WITH H5 TROF AND VORT MAX
ROUNDING BASE OF TROF YET TO MOVE THRU SRN PLAINS MONDAY. FNT SHUD
PUSH INTO NE OK LATE TONIGHT AND ON INTO SE OK/NW ARK BY LATE MON
MORN. WILL KEEP RW/TRW LIKELY IN SE ZNS AND WORD AS SCT RW IN NRN
ZNS. CLDS WILL DECREASE LATE MONDAY FROM THE NW.

THINGS WILL DRY OUT AS SFC HI BUILDS INTO FA MONDAY NIGHT/TUE WITH
TMPS IN 60S TO MID 70S.

TUL  053/062 043/068 048 +500
FSM  060/068 046/072 042 8810
MLC  058/066 047/073 048 87-0
BVO  049/062 040/070 049 9400
FYV  058/064 042/068 039 +910
IDB  061/072 050/074 045 8820
BYV  058/063 040/067 038 +910

.TUL...
OK...FLASH FLOOD WATCH ZNS 54>76 TONIGHT.
AR...FLASH FLOOD WATCH ZNS 1/2/10/11/19/29 TONIGHT.

In the hours before

Local storm report, Apr 21, 3:32 PM CDT, 59 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
331 PM CDT SUN APR 21 1996

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

0231 PM    KEYSTONE LAKE SOUTHWEST   OK   1.75 INCH HAIL
04/21/96   CREEK

0313 PM    SKIATOOK                  OK   .88 INCH HAIL
04/21/96   TULSA
Local storm report, Apr 21, 4:14 PM CDT, 17 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
412 PM CDT SUN APR 21 1996

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

0334 PM    6 NW PRYOR                OK   1.00 INCH HAIL
04/21/96   MAYES

0408 PM    6 S VINITA                OK  1.00 INCH HAIL
04/21/96   CRAIG
Local storm report, Apr 21, 4:21 PM CDT, 10 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
419 PM CDT SUN APR 21 1996

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

0334 PM    6 NW PRYOR                OK   1.00 INCH HAIL
04/21/96   MAYES

0408 PM    6 S VINITA                OK   1.00 INCH HAIL
04/21/96   CRAIG

0418 PM    VINITA                    OK   .75 INCH HAIL
04/21/96   CRAIG
Local storm report, Apr 21, 4:27 PM CDT, 4 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE TULSA, OK
426 PM CDT SUN APR 21 1996

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

0424 PM    BIG CABIN                 OK   1.00 INCH HAIL
04/21/96   CRAIG

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 21, 1:51 PM CDTSevere Thunderstorm WarningTSACreek, Pawnee54 min
Apr 21, 2:10 PM CDTSevere Thunderstorm WarningTSAOsage, Tulsa50 min
Apr 21, 2:28 PM CDTSevere Thunderstorm WarningTSATulsa47 min
Apr 21, 2:55 PM CDTSevere Thunderstorm WarningTSARogers50 min
Apr 21, 3:00 PM CDTSevere Thunderstorm WarningTSAPawnee45 min
Apr 21, 3:02 PM CDTSevere Thunderstorm WarningTSAWashington28 min
Apr 21, 3:08 PM CDTSevere Thunderstorm WarningTSATulsa37 min
Apr 21, 3:13 PM CDTSevere Thunderstorm WarningTSAOsage, Washington47 min
Apr 21, 3:21 PM CDTSevere Thunderstorm WarningTSACraig, Mayes54 min
Apr 21, 3:27 PM CDTSevere Thunderstorm WarningTSAOsage48 min
Apr 21, 3:36 PM CDTSevere Thunderstorm WarningTSAPawnee39 min
Apr 21, 3:38 PM CDTSevere Thunderstorm WarningTSARogers52 min
Apr 21, 4:08 PM CDTSevere Thunderstorm WarningTSACraig, Delaware, Ottawa52 min
Apr 21, 4:48 PM CDTSevere Thunderstorm WarningTSAOttawa42 min
Apr 21, 5:09 PM CDTSevere Thunderstorm WarningTSAOsage, Pawnee66 min
Apr 21, 5:40 PM CDTSevere Thunderstorm WarningTSAOttawa50 min
Apr 21, 6:05 PM CDTSevere Thunderstorm WarningTSAOsage, Washington40 min
Apr 21, 6:16 PM CDTSevere Thunderstorm WarningTSANowata44 min
Apr 21, 6:39 PM CDTSevere Thunderstorm WarningTSAOsage, Washington51 min
Apr 21, 6:51 PM CDTTornado WarningTSAOsage54 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1996Every severe thunderstorm warning in 1996

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.