Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 81, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Apr 15, 2001, 2:28 AM CDT for Muskogee County, Oklahoma. It was in force for 47 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
- Apr 15, 2001, 2:28 AM CDT (07:28 UTC)
- Expired
- Apr 15, 2001, 3:15 AM CDT
- In force
- 47 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Muskogee County, OK
The radar
The Tulsa radar (KINX), 46 km from the middle of the area, began a volume at 07:30 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 |
|---|---|---|---|
| Apr 15, 2:55 AM CDT | Hail 0.75 | Muskogee, 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 |
|---|---|---|---|
| Apr 15, 1:00 AM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Norman, OK (KOUN), launched 00:00Z, 7.5 hours before the alert went out and 178 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
- 1336 J/kg
- Mixed-layer CIN
- -112 J/kg
- Mixed-layer LCL
- 484 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 265 m²/s²
- 0-3 km storm-relative helicity
- 359 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.6
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS54 KTSA 150728
SVRTUL
OKC101-150815-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
228 AM CDT SUN APR 15 2001
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MUSKOGEE COUNTY IN EAST CENTRAL OKLAHOMA
* UNTIL 315 AM CDT
* AT 228 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3
MILES NORTHWEST OF HASKELL...MOVING SOUTHEAST AT 40 MPH.
* SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...HASKELL...
TAFT...BRAGGS...KEEFETON AND WARNER.
HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 65 MPH CAN BE
EXPECTED IN THE WARNED AREA.
THIS IS A DANGEROUS STORM. IF YOU ARE NEAR ITS PATH YOU SHOULD
PREPARE FOR VERY LARGE HAIL AND STRONG DAMAGING STRAIGHT LINE WINDS.
SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS
LAT...LON 3592 9574 3584 9585 3546 9531 3565 9513
3580 9559What 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, 9:50 PM CDT, 4 hours 38 minutes earlier.
Area forecast discussion, Apr 14, 9:50 PM CDT, 4 hours 38 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 950 PM CDT SAT APR 14 2001 THE QUESTION STILL REMAINS HOW FAR SOUTH WILL THE STORM COMPLEX GO? ONE ISOLATED SUPERCELL HAS BEEN MOVING SLIGHTLY SOUTH OF EAST ACROSS SOUTHERN KANSAS ALL EVENING...WHILE A CLUSTER OF STORMS HAS RECENTLY DEVELOPED TO THE WEST OF THIS STORM. IT STILL APPEARS THAT MOST OF NORTHEAST OKLAHOMA MAY BE SPARED...BUT AREAS NEAR THE KANSAS BORDER WILL PROBABLY FEEL THE HEAT IN THE NEXT FEW HOURS. THE 00Z MESOETA KEEPS MOST OF THE PRECIPITATION ALONG AND NORTH OF THE KANSAS BORDER THROUGH 6Z AND THEN BACK BUILDS IT INTO A MORE WESTERLY LOW-LEVEL JET ACROSS FAR NORTHEAST OKLAHOMA AND EVENTUALLY NORTHWEST ARKANSAS. THIS SCENARIO IS IN LINE WITH 18Z RUN AND IN GENERAL MAKES SENSE. WILL THEREFORE INCREASE POPS TO CATEGORICAL IN THE NORTHEAST ZONES AND TAPER THEM TO CHANCE NEAR THE RED RIVER. A FEW SHOWERS REMAIN NEAR THE RED RIVER AT THIS TIME...BUT MOST OF ACTIVITY HAS MOVED EAST OF THAT AREA. UPDATED ZONES WILL BE SENT AROUND 10 PM SO THAT WATCH HEADLINES CAN BE CHANGED APPROPRIATELY. THE WATCH IN SOUTHEAST OKLAHOMA WILL EXPIRE ANDl A NEW WATCH FOR NORTHEAST OKLAHOMA AND NORTHWEST ARKANSAS WILL BEGIN AT THAT TIME. FCSTID = 19 .TSA... AR...NONE. OK...NONE.
In the hours before
Local storm report, Apr 15, 1:34 AM CDT, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
134 AM CDT SUN APR 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1255 AM 7 E CENTRALIA OK 60 MPH TSTM GUST
04/15/01 CRAIG OKLAHOMA MESONETLocal storm report, Apr 15, 1:40 AM CDT, 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
140 AM CDT SUN APR 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
g0105 AM 2 NE MIAMI OK 68 MPH TSTM GUST
04/15/01 OTTAWA OKLAHOMA MESONETLocal storm report, Apr 15, 2:02 AM CDT, 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
202 AM CDT SUN APR 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0151 AM HIGHFILL AR 86 MPH TSTM GUST
04/15/01 BENTON ASOS REPORTLocal storm report, Apr 15, 2:04 AM CDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED WIND SPEED...
NATIONAL WEATHER SERVICE TULSA OK
204 AM CDT SUN APR 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
..G..COUNTY LOCATION....
0151 AM HIGHFILL AR 99 MPH TSTM GUST
04/15/01 BENTON ASOS REPORTLocal storm report, Apr 15, 2:16 AM CDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
216 AM CDT SUN APR 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0209 AM BROKEN ARROW OK 1 INCH HAIL
04/15/01 TULSA QUARTER HAIL REPORTED
AT 81ST AND ELM
[EMERGENCY MANAGER]
(Local storm report, Apr 15, 2:19 AM CDT, 9 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
219 AM CDT SUN APR 15 2001
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0142 AM 3 N LOCUST GROVE OK 65 MPH TSTM GUST
04/15/01 MAYES SPOTTER REPORTThe office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 14, 7:20 PM CDT | Severe Thunderstorm Warning | TSA | Choctaw, Pushmataha | 70 min |
| Apr 14, 11:37 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 38 min |
| Apr 15, 12:11 AM CDT | Severe Thunderstorm Warning | TSA | Nowata, Washington | 49 min |
| Apr 15, 12:11 AM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 49 min |
| Apr 15, 12:58 AM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee, Tulsa | 47 min |
| Apr 15, 1:27 AM CDT | Severe Thunderstorm Warning | TSA | Delaware, Mayes, Rogers | 48 min |
| Apr 15, 1:27 AM CDT | Severe Thunderstorm Warning | TSA | Tulsa | 48 min |
| Apr 15, 1:40 AM CDT | Severe Thunderstorm Warning | TSA | Creek | 50 min |
| Apr 15, 2:05 AM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee | 40 min |
| Apr 15, 2:05 AM CDT | Severe Thunderstorm Warning | TSA | Wagoner | 40 min |
| Apr 15, 3:03 AM CDT | Severe Thunderstorm Warning | TSA | Sequoyah | 57 min |
| Apr 15, 3:54 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 66 min |
Nearby
Severe Thunderstorm Warnings in Oklahoma, 2001Every severe thunderstorm warning in 2001
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.