Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 417, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Oct 5, 2001, 12:52 AM CDT for Osage County, Oklahoma. It was in force for 38 min. No storm report in the archive falls 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.
The facts
- Issued
- Oct 5, 2001, 12:52 AM CDT (05:52 UTC)
- Expired
- Oct 5, 2001, 1:30 AM CDT
- In force
- 38 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Osage County, OK
The nearest sounding before it
Lamont, OK (KLMN), launched 00:00Z, 5.9 hours before the alert went out and 97 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
- 1691 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1458 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 280 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.4
The text
As transmitted, in the capitals the NWS used until 2016.
052 WUUS54 KTSA 050553 SVRTUL OKC113-050630- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 1252 AM CDT FRI OCT 5 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN OSAGE COUNTY IN NORTHEAST OKLAHOMA * UNTIL 130 AM CDT * AT 1252 AM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG A LINE EXTENDING FROM GRAINOLA TO 10 MILES SOUTH OF HULAH...MOVING NORTHEAST AT 25 MPH. * SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...BIGHEART... HULAH AND GRAINOLA. HAIL TO THE SIZE OF DIMES AND WIND GUSTS TO 60 MPH CAN BE EXPECTED IN THE WARNED AREA. LAT...LON 3694 9678 3679 9602 3699 9601 3699 9670
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 4, 9:10 PM CDT, 3 hours 42 minutes earlier.
Area forecast discussion, Oct 4, 9:10 PM CDT, 3 hours 42 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 910 PM CDT THU OCT 4 2001 LINE OF CONVECTION ALOND COLD FRONT FROM SOUTHEAST KANSAS INTO NORTH CENTRAL OKLAHOMA THIS EVENING. FRONT HAS CONTINUED TO SAG SOUTHWARD THROUGH THE EVENING...BUT PROGRESS HAS BEEN VERY SLOW. SHOULD BEGIN TO SEE STORMS IMPACT OSAGE COUNTY OVER THE NEXT 1-2 HOURS...THEN REMAINING KANSAS BORDER COUNTIES BY AROUND MIDNIGHT OR SO. TIMING OF FRONT TO AROUND THE I-40 CORRIDOR DURING THE OVERNIGHT HOURS LOOKS GOOD...SO TREND OF AFTERNOON FORECAST STILL ON TRACK. EXPECT STORMS TO CONTINUE ALONG THE FRONT DURING THE NIGHT...AND WILL ALSO CONTINUE TO SEE POTENTIAL FOR AT LEAST ISOLATED SEVERE STORMS FOR A LITTLE WHILE LONGER. WILL HOLD OFF ON ANY UPDATE AT THIS TIME TILL CURRENT WATCH OVER FAR NORTHERN COUNTIES EXPIRES OR IS REPLACED. .TSA... 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 4, 10:31 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 44 min |
| Oct 4, 11:13 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 62 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; the sounding from the Mesonet's radiosonde archive.