Alert archive / Oklahoma / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 312, NWS Tulsa, OK
NWS Tulsa, OK issued this severe thunderstorm warning at Jul 30, 2001, 5:27 PM CDT for Haskell County, Oklahoma. It was in force for 48 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 30, 2001, 5:27 PM CDT (22:27 UTC)
- Expired
- Jul 30, 2001, 6:15 PM CDT
- In force
- 48 min
- Issued by
- NWS Tulsa, OK
- Area
- Whole counties
County Haskell County, OK
The radar
The Western Arkansas radar (KSRX), 69 km from the middle of the area, began a volume at 22:29 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.
The nearest sounding before it
Norman, OK (KOUN), launched 12:00Z, 10.5 hours before the alert went out and 207 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
- 1103 J/kg
- Mixed-layer CIN
- -220 J/kg
- Mixed-layer LCL
- 1621 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS54 KTSA 302227 SVRTUL OKC061-302315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TULSA OK 527 PM CDT MON JUL 30 2001 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... HASKELL COUNTY IN SOUTHEAST OKLAHOMA * UNTIL 615 PM CDT * AT 527 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 3 MILES SOUTHWEST OF STIGLER MOVING VERY LITTLE. * SOME LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...STIGLER. WIND GUSTS TO 70 MPH CAN BE EXPECTED IN THE WARNED AREA. BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH. $$ LAT...LON 3528 9500 3541 9509 3527 9524 3516 9516
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 Jul 30, 3:40 PM CDT, 1 hour 47 minutes earlier.
Area forecast discussion, Jul 30, 3:40 PM CDT, 1 hour 47 minutes before
EASTERN OKLAHOMA/NORTHWEST ARKANSAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE TULSA OK 340 PM CDT MON JUL 30 2001 .SHORT TERM... FIRST PERIOD CONCERNS INCLUDE THE POSSIBILITY OF ISOLD CONVECTION MAINLY ACROSS THE FAVORED TERRAIN AREAS OF WRN AR/SE OK. ATTM...FEEL AREAL COVERAGE DOES NOT WARRANT A MENTION IN THE ZNS...BUT WL TAKE A LOOK AT LAST MINUTE RADAR TRENDS BEFORE SENDING ZNS. AFTER THAT...OVERNIGHT LOWS WILL BE A PROBLEM. WITH THE LIKELYHOOD OF KEEPING WIND SPEEDS UP TONIGHT...WILL GO AHEAD AND ISSUE A HEAT ADV MAINLY FOR WRN ZNS. OVERNIGHT LOW TEMPS TONIGHT WILL BE AROUND 80F IN MANY LOCATIONS IN THE WEST...AND IF A FEW SITES DROP BELOW CRITERIA...IT WILL ONLY BE FOR A VERY SHORT TIME PROVIDING NO REAL RELIEF TO THE HEAT. OVERNIGHT LOWS THIS MORNING WERE VERY WARM ACROSS THE CWFA WITH KTUL ONLY DROPPING TO 82F...AND A FEW OTHER LOCATIONS ONLY REACHING 80F. .LONG TERM... AFTER TONIGHT...PERSISTENCE WILL BE THE BEST FORECAST. ONLY REAL CHC FOR PCPN WILL BE IN THE FORM OF ISOLD AFTN TSRA ACROSS THE FAVORED TERRAIN AREAS. WL LEAVE WORDING OUT OF ZNS AT THIS POINT...AND ALLOW LATER SHIFTS TO HANDLE THIS ON A DAY BY DAY BASIS. PARTIAL LOW LEVEL THICKNESS FCSTS OVER THE NEXT COUPLE OF DAYS VARY LITTLE. H8/H7/H5 HGHTS ALSO REMAIN NEARLY THE SAME OR RISE SLIGHTLY OVER THE NEXT FEW DAYS. ALL THIS TO SAY THAT HOT AND DRY CONTINUES ACROSS ALL OF THE CWFA FOR THE NEXT FEW DAYS. FEEL THAT OVERNIGHT LOWS WILL ALSO BE WARM /U70S TO AROUND 80F/ GIVEN INCREASING SFC GRADIENT...AND WINDS REMAINING UP ALL NIGHT THROUGH MID WEEK. .EXTENDED DISCUSSION... STRONG RIDGE TO REMAIN IN CONTROL OF THE CWFA THROUGH THE PERIOD. WITH LITTLE CHANGE IN TEMPERATURES THROUGHOUT THE PERIOD. MEDIUM RANGE GUIDANCE IN GOOD AGREEMENT THROUGH MUCH OF THE EXTENDED PERIOD. BY DAY 6 AND 7...THE ECMWF IS THE OUTLIER BY DEVELOPING A CUTOFF OFF THE NRN CA COAST. IN DOING SO...THE ECMWF RETROGRADES THE RIDGE SLIGHTLY...RETURNING THE AREA TO WEAK NW FLOW BY SUNDAY. CANADIAN GEM IS THE MOST PROGRESSIVE WITH SHORTWAVES MOVING THROUGH THE NRN STREAM. CANADIAN DOES...HOWEVER...KEEP THE RIDGE IN PLACE THROUGH THE PERIOD. MRF HAS SHOWN RUN TO RUN CONSISTENCY IN HOLDING THE RIDGE FIRMLY IN CONTROL OF THE CWFA...AND WILL FOLLOW A PERSISTENCE FCST OF HOT AND DRY FOR NOW. THANKS FOR THE COORD OUN AND FWD MANNING FCSTID = 24 TUL 80 99 80 100 / 10 10 10 10 FSM 77 99 76 100 / 10 10 10 10 MLC 78 99 78 100 / 10 10 10 10 BVO 76 100 76 101 / 0 10 10 10 FYV 73 94 73 95 / 10 10 10 10 BYV 72 94 74 95 / 10 10 10 10 MIO 75 97 75 95 / 10 10 10 10 MKO 79 99 79 100 / 10 10 10 10 F10 79 99 79 100 / 10 10 10 10 HHW 77 97 76 98 / 10 10 10 10 .TSA... AR...NONE. OK...HEAT ADVISORY FOR MONDAY NIGHT THROUGH WEDNESDAY FOR ZONES OKZ054>056...OKZ059>061...OKZ064>067...OKZ070>071...OKZ073.
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 5:00 PM CDT | Severe Thunderstorm Warning | TSA | Haskell | 30 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; radar from the NEXRAD Level II archive.