Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 121, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 22, 1999, 8:16 PM CDT for Okfuskee County, Okmulgee County, Oklahoma. It was in force for 29 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 22, 1999, 8:16 PM CDT (01:16 UTC)
- Expired
- Apr 22, 1999, 8:45 PM CDT
- In force
- 29 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Okfuskee County, OK, Okmulgee County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 22, 8:30 PM CDT | Hail 0.75 | Schulter, OK | |
| Apr 22, 8:30 PM CDT | Hail 0.75 | Weleetka, OK | |
| Apr 22, 8:32 PM CDT | Thunderstorm Wind | Dewar, OK | Several trees were blown down in Dewar. |
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 |
|---|---|---|---|
| Apr 22, 4:00 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 1.3 hours before the alert went out and 120 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
- 693 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1920 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.2
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 22, 7:50 PM CDT, 26 minutes earlier.
Area forecast discussion, Apr 22, 7:50 PM CDT, 26 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 750 PM CDT THU APR 22 1999 LINE OF SEVERE STORMS CONTINUES TO PUSH SE ALONG SURFACE BOUNDARY. DONT EXPECT LINE TO CONTINUE TO PUSH SOUTH AND SHOULD HANG UP AFTER DARK. THREAT FOR FLOODING MAY DEVELOP IF STORMS DO NOT DIE WITH HEATING. WILL COUNT ON STORMS DIMINISHING FOR NOW AND TWEAK POPS UP A FEW COUNTIES AHEAD OF CURRENT PRECIP. WILL DROP POPS OR REWORD TO LATE TONIGHT FOR POSSIBLE REDEVELOPMENT NORTH OF ONGOING PRECIP. BOUNDARY EXPECTED TO STALL WITH VERY MOIST AIR SET TO OVERRUN IT. UPDATED ZONES TO ADJUST TORNADO WATCH HEADLINES AS WELL. ANOTHER UPDATE LATER THIS EVE. /13 AR...NONE. OK...NONE.
In the hours before
Local storm report, Apr 22, 4:30 PM CDT, 3 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED 2ND REPORT
NATIONAL WEATHER SERVICE TULSA OK
430 PM CDT THU APR 22 1999
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0415 PM 2 E LENAPAH OK 2.75 INCH HAIL
04/22/99 NOWATASpecial weather statement, Apr 22, 7:43 PM CDT, 33 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-231100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 743 PM CDT THU APR 22 1999 TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES IN NORTHWEST ARKANSAS BENTON...WASHINGTON AND CRAWFORD THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS. AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE UNTIL 9AM IN THE WATCH AREA. IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 7:43 PM CDT, 33 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-231100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 743 PM CDT THU APR 22 1999 TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES IN NORTHWEST ARKANSAS BENTON...WASHINGTON AND CRAWFORD THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS. AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE UNTIL 9AM IN THE WATCH AREA. IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 7:45 PM CDT, 31 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-230200- SPECIAL WEATHER STATEMENT...CORRECTED TIMES AND EXPIRATION NATIONAL WEATHER SERVICE TULSA OK 745 PM CDT THU APR 22 1999 TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES IN NORTHWEST ARKANSAS BENTON...WASHINGTON AND CRAWFORD THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS. AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE UNTIL 9PM IN THE WATCH AREA. IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
Special weather statement, Apr 22, 7:45 PM CDT, 31 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-230200- SPECIAL WEATHER STATEMENT...CORRECTED TIMES AND EXPIRATION NATIONAL WEATHER SERVICE TULSA OK 745 PM CDT THU APR 22 1999 TORNADO WATCH 166 REMAINS IN EFFECT UNTIL 9PM FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA OKMULGEE...MUSKOGEE...WAGONER...CHEROKEE...ADAIR...DELAWARE AND MAYES IN NORTHWEST ARKANSAS BENTON...WASHINGTON AND CRAWFORD THE TORNADO WATCH HAS BEEN CANCELED FOR THE FOLLOWING COUNTIES: IN NORTHEAST OKLAHOMA WASHINGTON...NOWATA...CRAIG...OTTAWA...CREEK...TULSA AND ROGERS. AT 740 PM...RADAR INDICATED THE LINE OF STRONG TO SEVERE THUNDERSTORMS HAD MOVED SOUTHEASTWARD INTO FAR NORTHWEST ARKANSAS AND EASTCENTRAL OKLAHOMA. THE THREAT FOR SEVERE STORMS AND TORNADOES WILL CONTINUE UNTIL 9PM IN THE WATCH AREA. IF THREATENING WEATHER APPROACHES MOVE TO SAFE SHELTER.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 22, 7:06 PM CDT | Tornado Warning | TSA | Cherokee, Wagoner | 54 min |
| Apr 22, 7:10 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee | 35 min |
| Apr 22, 7:39 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 51 min |
| Apr 22, 7:50 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okmulgee | 40 min |
| Apr 22, 7:55 PM CDT | Flash Flood Warning | TSA | Cherokee | 3 hr |
| Apr 22, 7:58 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 47 min |
| Apr 22, 8:28 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee | 47 min |
| Apr 22, 8:33 PM CDT | Flash Flood Warning | TSA | Okfuskee, Okmulgee | 3 hr |
| Apr 22, 8:33 PM CDT | Flash Flood Warning | TSA | Muskogee | 3 hr |
| Apr 22, 8:44 PM CDT | Severe Thunderstorm Warning | TSA | Adair | 46 min |
| Apr 22, 9:02 PM CDT | Severe Thunderstorm Warning | TSA | Cherokee | 28 min |
| Apr 22, 9:27 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Sequoyah | 33 min |
| Apr 22, 9:29 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Okfuskee | 46 min |
| Apr 22, 10:02 PM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 43 min |
| Apr 22, 10:10 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Pittsburg | 50 min |
| Apr 22, 10:41 PM CDT | Flash Flood Warning | TSA | McIntosh | 64 min |
| Apr 22, 11:23 PM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 37 min |
| Apr 23, 12:26 AM CDT | Severe Thunderstorm Warning | TSA | Haskell | 34 min |
| Apr 22, 7:15 PM CDT | Severe Thunderstorm Warning | TSA | Benton | 30 min |
| Apr 22, 8:08 PM CDT | Severe Thunderstorm Warning | TSA | Benton, Washington | 37 min |
| Apr 22, 8:23 PM CDT | Tornado Warning | TSA | Washington | 22 min |
| Apr 22, 9:32 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 28 min |
| Apr 22, 9:58 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 32 min |
| Apr 22, 10:30 PM CDT | Severe Thunderstorm Warning | TSA | Franklin, Madison | 45 min |
| Apr 22, 10:45 PM CDT | Severe Thunderstorm Warning | TSA | Crawford | 30 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.