Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 13, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jan 21, 1999, 9:07 PM CST for Pushmataha County, Oklahoma. It was in force for 38 min. 1 report came from inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.
The facts
- Issued
- Jan 21, 1999, 9:07 PM CST (03:07 UTC)
- Expired
- Jan 21, 1999, 9:45 PM CST
- In force
- 38 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Pushmataha County, OK
The radar
The Western Arkansas radar (KSRX), 128 km from the middle of the area, began a volume at 03:10 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 21, 9:30 PM CST | Hail 0.75 | Nashoba, OK | Dime-sized hail covered the ground at Nashoba. |
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 |
|---|---|---|---|
| Jan 21, 5:00 PM CST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 3.1 hours before the alert went out and 211 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2384 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 120 m²/s²
- 0-3 km storm-relative helicity
- 134 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUL 220309 SVRTUL OKC127-220345- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 907 PM CST THU JAN 21 1999 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... PUSHMATAHA COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 945 PM CST * AT 907 PM CST A SEVERE THUNDERSTORM WAS LOCATED 4 MILES NORTHWEST OF CLOUDY...MOVING NORTHEAST AT 40 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... KIAMICHI... NASHOBA AND SNOW. HAIL TO THE SIZE OF NICKELS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. A TORNADO WATCH IS ALSO IN EFFECT. TORNADOES CAN DEVELOP SUDDENLY FROM SEVERE THUNDERSTORMS. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS. LAT...LON 3436 9547 3423 9532 3456 9499 3467 9523
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 Jan 21, 8:45 PM CST, 22 minutes earlier.
Area forecast discussion, Jan 21, 8:45 PM CST, 22 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 845 PM CST THU JAN 21 1999 HAVE ALREADY SENT AN UPDATED ZONE AND RDF PACKAGE TO ACCOUNT FOR BATCH OF SEVERE STORMS MOVING ACROSS SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS. CURRENT INDICATIONS ARE THAT CLUSTER OF SEVERE STORMS WILL MOVE OUT OF COUNTY WARNING AREA BY AROUND 0300Z...BUT AIRMASS REMAINS UNSTABLE ACROSS THE REGION AND REDEVELOPMENT ALREADY OCCURRING ACROSS SOUTHEAST OKLA. WILL KEEP LIKELY POPS GOING FOR MUCH OF THE NIGHT IN SOUTHEAST OKLAHOMA AND WEST CENTRAL ARKANSAS WHERE BEST UPPER FORCING WILL PERSIST. COLD FRONT MAKING SLOW SWD PROGRESS ACROSS NORTHEAST OKLAHOMA THIS EVENING AND SHOULD CONTINUE A SLOW PUSH TO THE SOUTH OVERNIGHT. THE FRONT MAY AID DEVELOPMENT OF SHRA/TSRA LATER TONIGHT...AND WILL KEEP THE MENTION OF CHANCE POPS FOR NORTHEAST OKLAHOMA AND THE NORTHWEST CORNER OF ARK. NO CHANGES TO LATER PERIODS OF FORECAST. FCSTID = 9 .TUL... OK...NONE. AR...NONE.
In the hours before
Local storm report, Jan 21, 4:42 PM CST, 4 hours 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
442 PM CST THU JAN 21 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0423 PM STANLEY OK 1 INCH HAIL
01/21/99 PUSHMATAHA REPORTED BY CLAYTON CD
DIRECTORLocal storm report, Jan 21, 5:41 PM CST, 3 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
541 PM CST THU JAN 21 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0529 PM BENGAL OK 1 INCH HAIL
01/21/99 LATIMER REPORTED BY AMATEUR RADIO
SPOTTERLocal storm report, Jan 21, 6:05 PM CST, 3 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
605 PM CST THU JAN 21 1999
TIME(CST) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0545 PM LEFLORE OK 1 INCH HAIL
01/21/99 LE FLORE REPORTED BY PUBLIC
0554 PM WISTER OK 1.75 INCH HAIL
01/21/99 LE FLORE REPORTED BY AMATEUR
RADIO SPOTTER
0553 PM 8 SW CLAYTON OK 0.75 INCH HAIL
01/21/99 PUSHMATAHA REPORTED BY AMATEUR
RADIO SPOTTERThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 6:11 PM CST | Severe Thunderstorm Warning | TSA | Latimer | 34 min |
| Jan 21, 6:11 PM CST | Tornado Warning | TSA | LeFlore | 34 min |
| Jan 21, 6:41 PM CST | Severe Thunderstorm Warning | TSA | Latimer, LeFlore, Pushmataha | 49 min |
| Jan 21, 6:49 PM CST | Severe Thunderstorm Warning | TSA | Haskell | 41 min |
| Jan 21, 7:28 PM CST | Severe Thunderstorm Warning | TSA | LeFlore | 47 min |
| Jan 21, 8:52 PM CST | Severe Thunderstorm Warning | TSA | Choctaw | 38 min |
| Jan 21, 9:12 PM CST | Severe Thunderstorm Warning | TSA | LeFlore | 33 min |
| Jan 21, 9:45 PM CST | Severe Thunderstorm Warning | TSA | LeFlore | 45 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 1999Every severe thunderstorm warning in 1999
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.