Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 416, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Oct 4, 2001, 11:13 PM CDT for Osage County, Oklahoma. It was in force for 62 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
- Oct 4, 2001, 11:13 PM CDT (04:13 UTC)
- Expired
- Oct 5, 2001, 12:15 AM CDT
- In force
- 62 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Osage County, OK
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 4, 11:15 PM CDT | Thunderstorm Wind 61 E | Foraker, 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
Lamont, OK (KLMN), launched 00:00Z, 4.2 hours before the alert went out and 96 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.
564
WUUS54 KTSA 050413
SVRTUL
OKC113-050515-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
1113 PM CDT THU OCT 4 2001
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN OSAGE COUNTY IN NORTHEAST OKLAHOMA
* UNTIL 1215 AM CDT
* AT 1112 PM CDT...DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS ALONG
A LINE EXTENDING FROM 2 MILES SOUTHEAST OF HULAH TO 16 MILES WEST
OF BURBANK...MOVING SOUTHEAST AT 15 MPH.
* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...SHIDLER...
BURBANK...PEARSONIA...BIGHEART...FORAKER AND HULAH.
HAIL TO THE SIZE OF QUARTERS AND WIND GUSTS TO 60 MPH CAN BE
EXPECTED IN THE WARNED AREA.
BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
LAT...LON 3699 9601 3699 9671 3662 9703 3663 9684
3684 9601What 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, 2 hours 3 minutes earlier.
Area forecast discussion, Oct 4, 9:10 PM CDT, 2 hours 3 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.
In the hours before
Special weather statement, Oct 4, 6:23 PM CDT, 4 hours 50 minutes before
ARZ001-002-010-011-019-020-029-OKZ049-053>076-051200- EASTERN OKLAHOMA/NORTHWEST ARKANSAS HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE TULSA OK 623 PM CDT THU OCT 4 2001 ...UPDATE FOR SHORT TERM TRENDS... .DISCUSSION... EARLY THIS EVENING...A STRONG COLD FRONT EXTENDED SOUTHEAST OF A LINE FROM WICHITA TO EMPORIA TO KANSAS CITY. STRONG TO SEVERE THUNDERSTORMS WERE DEVELOPING ALONG THIS FRONT. ALTHOUGH INDIVIDUAL STORMS ARE MOVING TO THE NORTHEAST...THE FRONT IS MOVING SOUTHEAST...WHICH WILL EVENTUALLY BRING STORMS INTO NORTHEAST OKLAHOMA. THE AIRMASS HAS BECOME UNSTABLE...WITH CAPES OF 2000 TO 3000 J/KG...AND LIFTED INDEX VALUES AROUND -5 C. THIS ENVIRONMENT WILL SUPPORT SEVERE THUNDERSTORM DEVELOPMENT...WITH STORMS EXPECTED TO ARRIVE IN NORTHEAST OKLAHOMA AFTER 8 PM. THE MAIN THREAT FROM STORMS WILL BE LARGE HAIL AND DAMAGING WIND GUSTS.
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 5, 12:52 AM CDT | Severe Thunderstorm Warning | TSA | Osage | 38 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.