Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 114, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at May 7, 1997, 11:27 PM CDT for Pawnee County, Oklahoma. It was in force for 48 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
- May 7, 1997, 11:27 PM CDT (04:27 UTC)
- Expired
- May 8, 1997, 12:15 AM CDT
- In force
- 48 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Pawnee County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 7, 11:30 PM CDT | Hail 0.75 | Pawnee, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 7, 6:45 PM CDT | Tornado Watch | SPC | 6 hr |
| May 7, 10:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 4.5 hours before the alert went out and 137 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
- 1687 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 783 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 230 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 6.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 080428 RRA SVRTUL OKC117-080515- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1127 PM CDT WED MAY 7 1997 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1215 AM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN NORTHEAST OKLAHOMA ...PAWNEE COUNTY AT 1127 PM RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS EXTENDING FROM BLACKBURN TO PAWNEE TO SOONER LAKE. THE LINE OF STORMS IS MOVING EAST AT 20 MILES AN HOUR. DIME SIZE HAIL WAS REPORTED 1 MILE SOUTH OF PAWNEE AT 1121 PM. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 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 TO RAPIDLY CHANGING WEATHER CONDITIONS. KEEP TUNED TO THIS STATION FOR THE LATEST WEATHER BULLETINS. &
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 May 7, 8:35 PM CDT, 2 hours 52 minutes earlier.
Area forecast discussion, May 7, 8:35 PM CDT, 2 hours 52 minutes before
FPUS3 KTUL 080135 AFDTUL EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 835 PM CDT WED MAY 7 1997 CURRENT FCST SEEMS TO HAVE AN EXCELLENT HANDLE ON THE EVOLVING SITUATION. TORNADIC TSTM APPROACHING THE NW PART OF THE FCST AREA ATTM HAS TURNED SOUTHEAST. WOULD EXPECT THIS STORM TO GRADUALLY WEAKEN DURING THE NEXT COUPLE HOURS AS IT MOVES OUT OF THE INSTABILITY AXIS AND LOW LEVEL CONVERGENCE NEAR THE STORM IS MINIMAL. HOWEVER...COMPLEX OF STORMS IN ERN KS IS HEADED SOUTHEAST TOWARDS NE OK AND NW AR AND STORMS DEVELOPING IN WRN OK AND THE TX PANHANDLE SHOULD AFFECT SE OK LATER TONIGHT. THESE TWO AREAS OF STORMS ARE ALONG THE COLD FRONT WHICH WILL MOVE INTO NE OK LATER TONIGHT AND ACROSS THE REST OF THE AREA THURSDAY. NO FCST UPDATE IS ANTICIPATED ATTM BUT MAY UPDATE ZONES AROUND MIDNIGHT TO REMOVE TIMING REFERENCES TO PRECIP AND UPDATE FOR ONGOING TRENDS AT THAT TIME. .TUL... OK...NONE. AR...NONE. PLATE
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 7, 8:36 PM CDT | Tornado Warning | TSA | Osage, Pawnee | 54 min |
| May 7, 9:24 PM CDT | Tornado Warning | TSA | Osage, Pawnee | 66 min |
| May 7, 9:48 PM CDT | Flash Flood Warning | TSA | Osage | 5 hr |
| May 7, 10:15 PM CDT | Tornado Warning | TSA | Osage | 60 min |
| May 7, 10:39 PM CDT | Tornado Warning | TSA | Tulsa, Washington | 51 min |
| May 7, 10:45 PM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 45 min |
| May 7, 10:52 PM CDT | Flash Flood Warning | TSA | Pawnee | 4 hr |
| May 7, 11:37 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 68 min |
| May 8, 12:03 AM CDT | Severe Thunderstorm Warning | TSA | Creek, Tulsa | 42 min |
| May 8, 12:38 AM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 52 min |
| May 8, 1:11 AM CDT | Severe Thunderstorm Warning | TSA | Rogers, Wagoner | 49 min |
| May 8, 2:09 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 51 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1997Every severe thunderstorm warning in 1997
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.