Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 101, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 14, 1998, 10:18 PM CDT for Osage County, Oklahoma. It was in force for 57 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Apr 14, 1998, 10:18 PM CDT (03:18 UTC)
- Expired
- Apr 14, 1998, 11:15 PM CDT
- In force
- 57 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Osage County, OK
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 14, 9:15 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 3.3 hours before the alert went out and 97 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
- 734 J/kg
- Mixed-layer CIN
- -69 J/kg
- Mixed-layer LCL
- 1916 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 144 m²/s²
- 0-3 km storm-relative helicity
- 232 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 4.1
The text
As transmitted, in the capitals the NWS used until 2016.
610 WUUS54 KTSA 150321 RRA SVRTUL OKC113-150415- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1018 PM CDT TUE APR 14 1998 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1115 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEASTERN OKLAHOMA ...NORTHERN OSAGE COUNTY AT 1015 PM...RADAR SHOWED A SEVERE THUNDERSTORM NEAR ARKANSAS CITY. THE STORM WAS MOVING TO THE EAST SOUTHEAST AT 35 MPH. GRAINOLA IS IN THE PATH OF THIS STORM. HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 65 MPH CAN BE EXPECTED IN THE WARNED AREA. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. REMAIN CALM BUT BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS.
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 14, 9:54 PM CDT, 24 minutes earlier.
Area forecast discussion, Apr 14, 9:54 PM CDT, 24 minutes before
FPUS3 KTUL 150259 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 954 PM CDT TUE APR 14 1998 RUNNING A BIT BEHIND ON THE UPDATE. 00Z CHARTS INDICATE DECENT 160 KT 250 MB JET NOSING INTO ERN OK...HOWEVER MSTR LIMITED AND MOST ACTIVITY REMAINING SCT...CURRENTLY ALG KS BORDER. BEST UPR SUPPORT ASSOSD WITH LR EXIT REGION OF UPR JET...SHORTWAVE ENERGY...AND MSTR CONV SHUD PULL N OF FCST AREA WITH TAIL END OF MAIN ACTION CLIPPING NERN OK WHERE BEST POTNL FOR ADDITIONAL SVR STORMS EXISTS (ACRS OUR FCST AREA) INTO THE EARLY MORNING HRS. DRYLINE STILL HANGING OUT IN WRN OK BEING SLOWED IN ITS EWD PROGRESSION AS UPR SHORTWAVE APRCHS. HOWEVER...AS SHORTWAVE MOVES ACRS KS LATER TONIGHT...DRYLINE SHUD MOVE A BIT FARTHER TO THE E INTO CNTRL OK. SOME QUESTION AS TO WHETHER OR NOT IT WL PUSH INTO FAR ERN OK. ATTM...THINK IT WL NOT BE INTO ERN COUNTIES BY DAYBREAK...AND IT WL BECOME MORE DIFFUSE AS LLVL FLOW BCMS A BIT MORE WLY BY MID MORNING WED SHALLOWING OUT THE KNEE-DEEP MSTR MORE THAN IT ALREADY IS. WL CUT POPS A BIT IN THE SRN AREAS TONIGHT...LEAVING LIKELY UP FOR AREAS N OF INTERSTATE 44 IN NERN OK. WL LEAVE MENTION FOR SEVERE IN FOR AREAS TO S AS ANYTHING THAT GOES HAS THE POTENTIAL OF BEING SEVERE (ALTHO CHCS OF INITIAL DVLPMNT LOOK MORE AND MORE LIMITED). WL DROP MENTION OF SVR ALG RED RIVER AREAS OF SERN OK AS SUPPORTING FACTORS FOR SEVERE WEATHER BCMG MORE AND MORE LIMITED. MADE SOME MINOR TWEEKS TO WINDS AND TEMPS. UPDATED ZONES ALREADY OUT. .TUL... OK...NONE. AR...NONE.
In the hours before
Local storm report, Apr 14, 7:09 PM CDT, 3 hours 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
709 PM CDT TUE APR 14 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0655 PM 1 W BURBANK OK .75 INCH HAIL
04/14/98 OSAGE
0700 PM SHIDLER OK 1.75 INCH HAIL
04/14/98 OSAGESpecial weather statement, Apr 14, 8:10 PM CDT, 2 hours 8 minutes before
OKZ054>062-064>067-150300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 810 PM CDT TUE APR 14 1998 THE TORNADO WATCH HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES IN NORTHEAST OKLAHOMA... OSAGE...WASHINGTON...NOWATA...CRAIG...OTTAWA...PAWNEE...TULSA... ROGERS...MAYES...CREEK...OKFUSKEE...OKMULGEE AND WAGONER. THE THREAT OF SEVERE WEATHER HAS ENDED FOR THE TIME BEING ACROSS THIS AREA. THERE IS STILL A CHANCE OF SEVERE THUNDERSTORMS DEVELOPING IN PARTS OF NORTHEAST OKLAHOMA AFTER 10 PM.
Special weather statement, Apr 14, 8:10 PM CDT, 2 hours 8 minutes before
OKZ054>062-064>067-150300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 810 PM CDT TUE APR 14 1998 THE TORNADO WATCH HAS BEEN CANCELLED FOR THE FOLLOWING COUNTIES IN NORTHEAST OKLAHOMA... OSAGE...WASHINGTON...NOWATA...CRAIG...OTTAWA...PAWNEE...TULSA... ROGERS...MAYES...CREEK...OKFUSKEE...OKMULGEE AND WAGONER. THE THREAT OF SEVERE WEATHER HAS ENDED FOR THE TIME BEING ACROSS THIS AREA. THERE IS STILL A CHANCE OF SEVERE THUNDERSTORMS DEVELOPING IN PARTS OF NORTHEAST OKLAHOMA AFTER 10 PM.
Local storm report, Apr 14, 9:59 PM CDT, 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
959 PM CDT TUE APR 14 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0945 PM COPAN OK .75 INCH HAIL
04/14/98 WASHINGTONLocal storm report, Apr 14, 10:18 PM CDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1018 PM CDT TUE APR 14 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 PM WANN OK 1 INCH HAIL
04/14/98 NOWATALocal storm report, Apr 14, 10:18 PM CDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
1018 PM CDT TUE APR 14 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1000 PM WANN OK 1 INCH HAIL
04/14/98 NOWATAThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 9:03 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 42 min |
| Apr 14, 9:30 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 45 min |
| Apr 14, 10:21 PM CDT | Tornado Warning | TSA | Osage | 54 min |
| Apr 15, 5:39 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Sequoyah | 51 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; the sounding from the Mesonet's radiosonde archive.