Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 291, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jun 30, 2001, 12:58 AM CDT for LeFlore County, Oklahoma. It was in force for 62 min. 6 reports 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
- Jun 30, 2001, 12:58 AM CDT (05:58 UTC)
- Expired
- Jun 30, 2001, 2:00 AM CDT
- In force
- 62 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County LeFlore County, OK
The radar
The Western Arkansas radar (KSRX), 34 km from the middle of the area, began a volume at 06:01 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 |
|---|---|---|---|
| Jun 30, 1:27 AM CDT | Thunderstorm Wind 52 E | Cowlington, OK | |
| Jun 30, 1:27 AM CDT | Thunderstorm Wind 52 E | Spiro, OK | |
| Jun 30, 1:27 AM CDT | Thunderstorm Wind 52 E | Pocola, OK | |
| Jun 30, 1:54 AM CDT | Hail 1.25 | Rock Is, OK | Half dollar size hail broke the windows out of the west side of a home. |
| Jun 30, 1:55 AM CDT | Thunderstorm Wind 61 E | Rock Is, OK | Thunderstorm winds estimated at 70 miles an hour blew the roof off a mobile home and partially destroyed a barn. Six other homes had siding blown off. |
| Jun 30, 1:57 AM CDT | Hail 0.75 | Pocola, 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 nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 6.0 hours before the alert went out and 202 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
- 821 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 966 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 50 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 300600 SVRTUL OKC079-300700- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1258 AM CDT SAT JUN 30 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN LE FLORE COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 200 AM CDT * AT 1258 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 7 MILES NORTHWEST OF BOKOSHE...MOVING SOUTHEAST AT 15 MPH. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...POCOLA... SPIRO...BOKOSHE...PANAMA AND CAMERON. HAIL TO THE SIZE OF GOLFBALLS AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. THIS IS A DANGEROUS STORM. IF YOU ARE IN# ITS PATH...BE PREPARED FOR LARGE HAIL AND STAY INSIDE AWAY FROM WINDOWS. LAT...LON 3534 9492 3513 9492 3512 9447 3533 9445
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 Jun 29, 9:30 PM CDT, 3 hours 28 minutes earlier.
Area forecast discussion, Jun 29, 9:30 PM CDT, 3 hours 28 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE TULSA OK 930 PM CDT FRI JUN 29 2001 A FEW SHOWERS WHERE NOTED OVER NW AR AND FAR SE OK...OTHERWISE ALL IS QUIET ACROSS THE FORECAST AREA SO FAR THIS EVENING. GOOD WAA PATTERN NOTED ACROSS ERN OK ON H85 ANALYSIS...ALONG WITH INFLUX OF +14-15C DEWPOINTS. 00Z MESOETA STILL SUGGESTS THAT STRONG ISENTROPIC LIFT WILL DEVELOP OVER THE NEXT FEW HOURS...WHICH IS BEST DEPICTED BY UPGLIDE ALONG 305K SURFACE. ZONE OF BEST LIFT IS A BIT FARTHER W THAN 18Z MESOETA...ALTHO PRESSURE CONDENSATION DEFICITS ARE RATHER LOW IN ERN OK...SO NOT MUCH LIFT WILL NEEDED FOR DEVELOPMENT. 1 TO 3 HOUR FFG VALUES ACROSS THE BULK OF ERN OK RUNNING AROUND 1.5 TO 2.5 RESPECTIVELY...WITH MUCH HIGHER VALUES IN NW AR AND FAR ERN OK. GIVEN THE EXCESSIVE RAIN OVER THE PAST FEW DAYS...CURRENT FLASH FLOOD WATCH LOOKS GOOD. WILL UPDATE TO ADJUST TEMPORAL WORDING...AND MAY TWEAK POPS IN A FEW LOCATIONS. FCSTID = 18 .TSA... AR...NONE. OK...FLASH FLOOD WATCH FOR THIS EVENING THROUGH SATURDAY MORNING FOR ZONES OKZ049...OKZ053...OKZ060>062...OKZ064>068...OKZ070>076.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 12:11 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee | 49 min |
| Jun 30, 12:41 AM CDT | Severe Thunderstorm Warning | TSA | Haskell | 64 min |
| Jun 30, 12:45 AM CDT | Severe Thunderstorm Warning | TSA | Pawnee | 60 min |
| Jun 30, 1:04 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 36 min |
| Jun 30, 1:37 AM CDT | Severe Thunderstorm Warning | TSA | Muskogee | 68 min |
| Jun 30, 1:41 AM CDT | Severe Thunderstorm Warning | TSA | McIntosh | 64 min |
| Jun 30, 2:11 AM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 64 min |
| Jun 30, 2:15 AM CDT | Flash Flood Warning | TSA | Haskell, McIntosh | 2 hr |
| Jun 30, 2:22 AM CDT | Severe Thunderstorm Warning | TSA | Haskell | 53 min |
| Jun 30, 2:35 AM CDT | Severe Thunderstorm Warning | TSA | Pushmataha | 55 min |
| Jun 30, 2:49 AM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 56 min |
| Jun 30, 2:59 AM CDT | Flash Flood Warning | TSA | Pittsburg | 2 hr |
| Jun 30, 3:17 AM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 58 min |
| Jun 30, 4:17 AM CDT | Severe Thunderstorm Warning | TSA | Pittsburg | 43 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.