Alert archive / Oklahoma / Tornado Warnings in 2013
Tornado Warning 15, NWS Tulsa, OK
NWS Tulsa, OK issued this tornado warning at May 20, 2013, 4:23 PM CDT for Nowata County, Rogers County, Washington County, Oklahoma. It was in force for 37 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- May 20, 2013, 4:23 PM CDT (21:23 UTC)
- Expired
- May 20, 2013, 5:00 PM CDT
- In force
- 37 min
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
Counties Nowata County, OK, Rogers County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 50 km from the middle of the area, began a volume at 21:25 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 |
|---|---|---|---|
| May 20, 4:35 PM CDT | TORNADO | 4 W Talala, OK | REPORTED BY OKLAHOMA HIGHWAY PATROL |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 20, 1:10 PM CDT | Tornado Watch | SPC | 9 hr |
The nearest sounding before it
Lamont, OK (KLMN), launched 12:00Z, 9.4 hours before the alert went out and 156 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
- 2620 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 651 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 164 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 7.9
The text
As transmitted, in the capitals the NWS used until 2016.
274 WFUS54 KTSA 202123 TORTSA OKC105-131-147-202200- /O.NEW.KTSA.TO.W.0015.130520T2123Z-130520T2200Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE TULSA OK 423 PM CDT MON MAY 20 2013 THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A * TORNADO WARNING FOR... SOUTHWESTERN NOWATA COUNTY IN NORTHEAST OKLAHOMA... NORTHWESTERN ROGERS COUNTY IN NORTHEAST OKLAHOMA... WASHINGTON COUNTY IN NORTHEAST OKLAHOMA... * UNTIL 500 PM CDT * AT 421 PM CDT...A LARGE AND EXTREMELY DANGEROUS TORNADO WAS LOCATED 3 MILES SOUTHEAST OF RAMONA...MOVING NORTHEAST AT 20 MPH. THIS LIFE THREATENING TORNADO IS CAPABLE OF EXTREME DAMAGE! * SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE... TALALA...WATOVA AND NOWATA. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF NO UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS! && LAT...LON 3677 9565 3651 9550 3645 9591 3652 9595 TIME...MOT...LOC 2124Z 246DEG 18KT 3650 9587 $$
3 follow-up statements
354 WWUS54 KTSA 202132 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 432 PM CDT MON MAY 20 2013 OKC105-131-147-202200- /O.CON.KTSA.TO.W.0015.000000T0000Z-130520T2200Z/ NOWATA OK-ROGERS OK-WASHINGTON OK- 432 PM CDT MON MAY 20 2013 ...TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR WASHINGTON...NORTHWESTERN ROGERS AND SOUTHWESTERN NOWATA COUNTIES... AT 429 PM CDT...A TORNADO WAS LOCATED NEAR RAMONA...MOVING NORTHEAST AT 35 MPH. THIS IS A LIFE THREATENING SITUATION! THIS STORM WILL ALSO BE CAPABLE OF PRODUCING HAIL TO THE SIZE OF GOLF BALLS. SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...TALALA... WATOVA AND NOWATA. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF NO UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS! && LAT...LON 3677 9565 3654 9552 3649 9587 3653 9593 TIME...MOT...LOC 2132Z 232DEG 29KT 3655 9581 $$
526 WWUS54 KTSA 202137 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 437 PM CDT MON MAY 20 2013 OKC105-131-147-202200- /O.CON.KTSA.TO.W.0015.000000T0000Z-130520T2200Z/ NOWATA OK-ROGERS OK-WASHINGTON OK- 437 PM CDT MON MAY 20 2013 ...TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR WASHINGTON...NORTHWESTERN ROGERS AND SOUTHWESTERN NOWATA COUNTIES... AT 434 PM CDT...A LARGE AND EXTREMELY DANGEROUS TORNADO WAS LOCATED 6 MILES WEST OF TALALA...MOVING NORTHEAST AT 35 MPH. THIS LIFE THREATENING TORNADO IS CAPABLE OF EXTREME DAMAGE! SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...TALALA... WATOVA AND NOWATA. PRECAUTIONARY/PREPAREDNESS ACTIONS... A LARGE AND EXTREMELY DANGEROUS TORNADO IS ON THE GROUND! THIS IS A LIFE THREATENING SITUATION! IF YOU ARE IN THE PATH OF THIS TORNADO...TAKE COVER IMMEDIATELY! IF NO UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS! && LAT...LON 3650 9583 3656 9590 3677 9565 3654 9552 TIME...MOT...LOC 2137Z 232DEG 29KT 3657 9578 $$
319 WWUS54 KTSA 202145 SVSTSA SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TULSA OK 445 PM CDT MON MAY 20 2013 OKC147-202155- /O.CAN.KTSA.TO.W.0015.000000T0000Z-130520T2200Z/ WASHINGTON OK- 445 PM CDT MON MAY 20 2013 ...THE TORNADO WARNING FOR WASHINGTON COUNTY IS CANCELLED... LAT...LON 3653 9576 3663 9581 3677 9565 3654 9552 TIME...MOT...LOC 2145Z 239DEG 27KT 3659 9571 $$ OKC105-131-202200- /O.CON.KTSA.TO.W.0015.000000T0000Z-130520T2200Z/ NOWATA OK-ROGERS OK- 445 PM CDT MON MAY 20 2013 ...TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR NORTHWESTERN ROGERS AND SOUTHWESTERN NOWATA COUNTIES... AT 442 PM CDT...A TORNADO WAS LOCATED NEAR TALALA...MOVING NORTHEAST AT 30 MPH. THIS IS A LIFE THREATENING SITUATION! SOME LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...WATOVA AND NOWATA. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF NO UNDERGROUND SHELTER IS AVAILABLE MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. MOBILE HOMES AND VEHICLES SHOULD BE ABANDONED FOR MORE SUBSTANTIAL SHELTER. AVOID WINDOWS! && LAT...LON 3653 9576 3663 9581 3677 9565 3654 9552 TIME...MOT...LOC 2145Z 239DEG 27KT 3659 9571 $$
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:13 PM CDT | Special Weather Statement | TSA | Tulsa | 47 min |
| May 19, 7:13 PM CDT | Tornado Warning | TSA | Creek, Okfuskee | 47 min |
| May 19, 7:48 PM CDT | Tornado Warning | TSA | Creek, Okfuskee, Okmulgee | 27 min |
| May 19, 7:51 PM CDT | Severe Thunderstorm Warning | TSA | Creek, McIntosh, Okfuskee, Okmulgee | 54 min |
| May 19, 8:12 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 63 min |
| May 19, 8:33 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 57 min |
| May 19, 8:42 PM CDT | Severe Thunderstorm Warning | TSA | Muskogee, Okmulgee, Tulsa, Wagoner | 63 min |
| May 19, 8:59 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 61 min |
| May 19, 9:20 PM CDT | Areal Flood Advisory | TSA | Osage | 2 hr |
| May 19, 9:36 PM CDT | Flash Flood Warning | TSA | Osage | 5 hr |
| May 19, 9:42 PM CDT | Special Weather Statement | TSA | Wagoner | 33 min |
| May 19, 9:52 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 53 min |
| May 19, 10:18 PM CDT | Severe Thunderstorm Warning | TSA | Washington | 27 min |
| May 19, 10:32 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Nowata | 43 min |
| May 19, 10:44 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 46 min |
| May 19, 11:04 PM CDT | Flash Flood Warning | TSA | Osage | 4 hr |
| May 19, 11:14 PM CDT | Special Weather Statement | TSA | Craig, Ottawa | 31 min |
| May 19, 11:30 PM CDT | Special Weather Statement | TSA | Ottawa | 30 min |
| May 19, 11:31 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 44 min |
| May 20, 12:38 AM CDT | Special Weather Statement | TSA | Osage | 37 min |
| May 20, 1:30 AM CDT | Special Weather Statement | TSA | Osage | 30 min |
| May 20, 1:38 AM CDT | Special Weather Statement | TSA | Kay | 37 min |
| May 20, 10:56 AM CDT | River Flood Watch | TSA | Adair | 22 hr |
| May 20, 10:56 AM CDT | River Flood Watch | TSA | Cherokee | 22 hr |
| May 20, 11:07 AM CDT | River Flood Watch | TSA | Ottawa | 44 hr |
| May 20, 12:45 PM CDT | Flash Flood Watch | TSA | Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more | 30 hr |
| May 20, 2:32 PM CDT | Special Weather Statement | TSA | Osage | 28 min |
| May 20, 2:52 PM CDT | Special Weather Statement | TSA | Pawnee | 38 min |
| May 20, 3:00 PM CDT | Severe Thunderstorm Warning | TSA | Osage | 45 min |
| May 20, 3:04 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee | 56 min |
| May 20, 3:39 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Osage, Rogers, Tulsa, Washington | 66 min |
| May 20, 3:43 PM CDT | Severe Thunderstorm Warning | TSA | Creek, Osage, Pawnee | 62 min |
| May 20, 3:47 PM CDT | Tornado Warning | TSA | Nowata, Osage, Rogers, Tulsa, Washington | 43 min |
| May 20, 4:03 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Osage, Washington | 57 min |
| May 20, 4:31 PM CDT | Severe Thunderstorm Warning | TSA | Osage, Pawnee, Rogers, Tulsa, Washington | 59 min |
| May 20, 4:37 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Osage, Washington | 68 min |
| May 20, 4:45 PM CDT | Tornado Warning | TSA | Creek, Okfuskee | 30 min |
| May 20, 4:50 PM CDT | Tornado Warning | TSA | Nowata | 25 min |
| May 20, 5:05 PM CDT | Severe Thunderstorm Warning | TSA | McIntosh, Muskogee, Okfuskee, Okmulgee | 55 min |
| May 20, 5:16 PM CDT | Severe Thunderstorm Warning | TSA | Nowata, Osage, Rogers, Tulsa, Washington | 44 min |
| May 20, 5:24 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Nowata, Rogers | 66 min |
| May 20, 5:44 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, McIntosh, Muskogee, Sequoyah | 61 min |
| May 20, 5:53 PM CDT | Severe Thunderstorm Warning | TSA | Craig, Delaware, Mayes, Nowata, Ottawa, Rogers | 67 min |
| May 20, 6:26 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Cherokee, Muskogee, Sequoyah | 64 min |
| May 20, 6:29 PM CDT | Tornado Warning | TSA | Ottawa | 31 min |
| May 20, 6:36 PM CDT | Tornado Warning | TSA | Adair, Cherokee | 39 min |
| May 20, 6:55 PM CDT | Severe Thunderstorm Warning | TSA | Adair, Haskell, LeFlore, Muskogee, Sequoyah | 65 min |
| May 20, 6:59 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, LeFlore, Pittsburg, Pushmataha | 61 min |
Nearby
Tornado Warnings in Oklahoma, 2013Every tornado warning in 2013Tornadoes in 2013
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.