Alert archive / Oklahoma / Flash Flood Warnings in 2017
Flash Flood Warning 20, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood warning at Apr 30, 2017, 7:35 AM CDT for Delaware County, Mayes County, Oklahoma. It was in force for 4 days. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 30, 2017, 7:35 AM CDT (12:35 UTC)
- Expired
- May 4, 2017, 7:30 PM CDT
- In force
- 4 days
- Issued by
- NWS Tulsa, OK
- Area
- Storm-based polygon
- Flood severity
- None
Counties Delaware County, OK, Mayes County, OK
The radar
The Tulsa radar (KINX), 55 km from the middle of the area, began a volume at 12:35 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
Springfield, MO (KSGF), launched 12:00Z, 0.6 hours before the alert went out and 122 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
- 65 J/kg
- Mixed-layer CIN
- -102 J/kg
- Mixed-layer LCL
- 480 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 371 m²/s²
- 0-3 km storm-relative helicity
- 389 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
The text
As transmitted.
202 WGUS54 KTSA 301235 FFWTSA OKC041-097-010030- /O.NEW.KTSA.FF.W.0020.170430T1235Z-170501T0030Z/ /00000.0.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Tulsa OK 735 AM CDT SUN APR 30 2017 The National Weather Service in Tulsa has issued a * Flash Flood Warning for... A Dam Floodgate Release in... West central Delaware County in northeastern Oklahoma... Northeastern Mayes County in northeastern Oklahoma... * Until 730 PM CDT Sunday * At 733 AM CDT, the GRDA reported the floodgates on the Pensacola Dam are to be opened at 8 AM. This will cause flash flooding downstream on the Neosho River. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3641 9486 3636 9507 3647 9531 3651 9511 $$ Lacy
5 follow-up statements
015 WGUS54 KTSA 302359 FFWTSA OKC041-097-020030- /O.EXT.KTSA.FF.W.0020.000000T0000Z-170502T0030Z/ /00000.0.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Tulsa OK 659 PM CDT SUN APR 30 2017 The National Weather Service in Tulsa has extended the * Flash Flood Warning for... A Dam Floodgate Release in... West central Delaware County in northeastern Oklahoma... Northeastern Mayes County in northeastern Oklahoma... * Until 730 PM CDT Monday * At 656 PM CDT, the GRDA reported the floodgates on the Pensacola Dam were open causing flash flooding downstream on the Neosho River. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3641 9486 3636 9507 3647 9531 3651 9511 $$
490 WGUS74 KTSA 011452 FFSTSA Flash Flood Statement National Weather Service Tulsa OK 952 AM CDT MON MAY 1 2017 OKC041-097-020030- /O.CON.KTSA.FF.W.0020.000000T0000Z-170502T0030Z/ /00000.0.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DELAWARE OK-MAYES OK- 952 AM CDT MON MAY 1 2017 ...A FLASH FLOOD WARNING FOR A DAM FLOODGATE RELEASE REMAINS IN EFFECT UNTIL 730 PM CDT MONDAY FOR WEST CENTRAL DELAWARE AND NORTHEASTERN MAYES COUNTIES... The floodgates on the Pensacola Dam have been opened, causing flash flooding downstream on the Grand-Neosho River. Gate changes can result in rapidly rising water. PRECAUTIONARY/PREPAREDNESS ACTIONS... Use caution near the river downstream of the dam. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3641 9486 3636 9507 3647 9531 3651 9511 $$
407 WGUS54 KTSA 020017 FFWTSA OKC041-097-030030- /O.EXT.KTSA.FF.W.0020.000000T0000Z-170503T0030Z/ /00000.0.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Tulsa OK 717 PM CDT MON MAY 1 2017 The National Weather Service in Tulsa has extended the * Flash Flood Warning for... A Dam Floodgate Release in... West central Delaware County in northeastern Oklahoma... Northeastern Mayes County in northeastern Oklahoma... * Until 730 PM CDT Tuesday * At 715 PM CDT, the GRDA reported the floodgates on the Pensacola Dam were opened causing flash flooding downstream on the Neosho River. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3641 9486 3636 9507 3647 9531 3651 9511 $$
648 WGUS54 KTSA 030007 FFWTSA OKC041-097-040030- /O.EXT.KTSA.FF.W.0020.000000T0000Z-170504T0030Z/ /00000.0.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Tulsa OK 707 PM CDT TUE MAY 2 2017 The National Weather Service in Tulsa has extended the * Flash Flood Warning for... A Dam Floodgate Release in... West central Delaware County in northeastern Oklahoma... Northeastern Mayes County in northeastern Oklahoma... * Until 730 PM CDT Wednesday * At 700 PM CDT, the GRDA continued to release water from the floodgates on Pensacola Dam. Releases remain steady for now. Additional rainfall overnight through Wednesday may require additional releases. The releases were causing flash flooding downstream on the Neosho River and this may worsen should additional releases be required. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. && LAT...LON 3641 9486 3636 9507 3647 9531 3651 9511 $$
986 WGUS54 KTSA 040006 FFWTSA OKC041-097-050030- /O.EXT.KTSA.FF.W.0020.000000T0000Z-170505T0030Z/ /00000.0.DR.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED Flash Flood Warning National Weather Service Tulsa OK 706 PM CDT WED MAY 3 2017 The National Weather Service in Tulsa has extended the * Flash Flood Warning for... A Dam Floodgate Release in... West central Delaware County in northeastern Oklahoma... Northeastern Mayes County in northeastern Oklahoma... * Until 730 PM CDT Thursday * At 704 PM CDT, the GRDA continued to release water from the floodgates on Pensacola Dam. Releases remain steady for now, and no additional rainfall is expected overnight. The releases were causing flash flooding downstream on the Grand-Neosho River and this may worsen should additional releases be required. PRECAUTIONARY/PREPAREDNESS ACTIONS... Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Stay away or be swept away. River banks and culverts can become unstable and unsafe. && LAT...LON 3641 9486 3636 9507 3647 9531 3651 9511 $$
The office that day
Everything else NWS Tulsa, OK issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 7:10 PM CDT | Severe Thunderstorm Warning | TSA | Haskell, Latimer, Muskogee, Pittsburg | 35 min |
| Apr 29, 7:12 PM CDT | Special Weather Statement | TSA | Cherokee | 48 min |
| Apr 29, 7:32 PM CDT | Special Weather Statement | TSA | Haskell, Muskogee | 28 min |
| Apr 29, 7:39 PM CDT | Special Weather Statement | TSA | Nowata | 51 min |
| Apr 29, 7:45 PM CDT | Special Weather Statement | TSA | McIntosh | 30 min |
| Apr 29, 7:54 PM CDT | Special Weather Statement | TSA | Muskogee | 36 min |
| Apr 29, 8:04 PM CDT | Flash Flood Warning | TSA | Creek, Okfuskee, Okmulgee, Osage, Pawnee, Tulsa | 4 hr |
| Apr 29, 8:04 PM CDT | Special Weather Statement | TSA | Okfuskee | 26 min |
| Apr 29, 8:07 PM CDT | Special Weather Statement | TSA | Okmulgee | 23 min |
| Apr 29, 8:20 PM CDT | Special Weather Statement | TSA | Wagoner | 25 min |
| Apr 29, 9:13 PM CDT | Special Weather Statement | TSA | LeFlore | 32 min |
| Apr 29, 9:42 PM CDT | Special Weather Statement | TSA | Choctaw | 18 min |
| Apr 29, 11:09 PM CDT | Areal Flood Warning | TSA | Creek, Okfuskee, Okmulgee, Osage, Pawnee, Tulsa | 36 hr |
| Apr 29, 11:17 PM CDT | Areal Flood Warning | TSA | Haskell, McIntosh, Muskogee, Pittsburg, Sequoyah | 36 hr |
| Apr 29, 11:25 PM CDT | Areal Flood Warning | TSA | Adair, Cherokee, Craig, Delaware, Mayes, Muskogee and 4 more | 36 hr |
| Apr 30, 3:02 AM CDT | River Flood Warning | TSA | Nowata | 53 hr |
| Apr 30, 4:11 AM CDT | Wind Advisory | TSA | Adair, Cherokee, Choctaw, Craig, Creek, Delaware and 16 more | 17 hr |
| Apr 30, 7:46 AM CDT | Flash Flood Warning | TSA | Mayes | 5 days |
| Apr 30, 10:40 AM CDT | River Flood Warning | TSA | Cherokee, Delaware | 11 hr |
Nearby
Flash Flood Warnings in Oklahoma, 2017Every flash flood warning in 2017
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.