Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 510, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Oct 3, 1999, 2:02 PM CDT for LeFlore County, Oklahoma. It was in force for 43 min. 2 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
- Oct 3, 1999, 2:02 PM CDT (19:02 UTC)
- Expired
- Oct 3, 1999, 2:45 PM CDT
- In force
- 43 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), 53 km from the middle of the area, began a volume at 19:18 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 |
|---|---|---|---|
| Oct 3, 2:45 PM CDT | Hail 0.75 | Page, OK | |
| Oct 3, 2:45 PM CDT | Thunderstorm Wind | Page, OK | Tree limbs were blown down, and lawn furniture was blown around. |
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 12:00Z, 7.0 hours before the alert went out and 237 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
- 1805 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 310 m²/s²
- 0-3 km storm-relative helicity
- 359 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Oct 3, 12:20 PM CDT, 1 hour 42 minutes earlier.
Area forecast discussion, Oct 3, 12:20 PM CDT, 1 hour 42 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 1220 PM CDT SUN OCT 3 1999 JUST SENT AN UPDATED ZONE PACKAGE TO MAKE FIRST PERIOD ADJUSTMENTS TO POPS AND TEMPERATURES. SCATTERED SHOWERS AND THUNDERSTORMS HAVE DEVELOPED ALONG AND JUST AHEAD OF THE COLD FRONT WHICH EXTENDED FROM BENTON COUNTY ARKANSAS TO NEAR KMLC. RAISED POPS INTO CHANCE CATEGORY IN AREAS ALONG AND AHEAD OF CURRENT FRONTAL POSISITON. ALSO LOWERED POPS IN AREAS BEHIND THE FRONT...WHERE SOME CLEARING HAS OCCURRED PAST FEW HOURS. EXTENSIVE STRATUS DECK ACROSS KANSAS AND NORTHCENTRAL OKLAHOMA WAS EDGING SOUTH THROUGH THE EXTREME NORTHWEST PART OF THE FORECAST AREA. EXPECT LOW CLOUDS TO CONTINUE SPREADING SOUTH...WITH THE THREAT OF DRIZZLE IN THE LOW OVERCAST. FORECAST PROBLEM FOR THE AFTERNOON PACKAGE WILL BE DETERMINING THE EXTENT AND PERSISTENCE OF THE LOW CLOUDS ACROSS THE FORECAST AREA TONIGHT AND MONDAY. NO CHANGES TO LATER PERIODS OF ZONES AT THIS TIME. FCSTID = 9 TUL 68 47 68 45 / 10 0 0 0 FSM 81 52 71 46 / 40 20 0 0 MLC 78 51 72 48 / 30 20 0 0 BVO 64 44 67 45 / 10 0 0 0 FYV 78 47 65 40 / 40 0 0 0 BYV 78 47 65 40 / 40 0 0 0 MIO 67 47 68 43 / 10 0 0 0 MKO 68 47 68 45 / 10 0 0 0 F10 68 47 68 45 / 10 0 0 0 HHW 82 54 75 50 / 30 20 0 0 .TUL... AR...NONE. OK...NONE.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 3, 2:45 PM CDT | Severe Thunderstorm Warning | TSA | LeFlore | 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; radar from the NEXRAD Level II archive.