Alert archive / Oklahoma / Flash Flood Watches in 2019
Flash Flood Watch 17, NWS Tulsa, OK
NWS Tulsa, OK issued this flash flood watch at Sep 21, 2019, 2:58 PM CDT for Nowata County, Pawnee County, Washington County, Oklahoma. It took effect at Sep 22, 2019, 4:00 AM CDT. It was in force for 11 hr.
The area
The counties it named.
The facts
- Issued
- Sep 21, 2019, 2:58 PM CDT (19:58 UTC)
- In effect from
- Sep 22, 2019, 4:00 AM CDT
- Expired
- Sep 22, 2019, 2:49 PM CDT
- In force
- 11 hr
- Issued by
- NWS Tulsa, OK
- Flood severity
- None
Counties Nowata County, OK, Pawnee County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 66 km from the middle of the area, began a volume at 19:59 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
Topeka, KS (KTOP), launched 12:00Z, 8.0 hours before the alert went out and 268 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
- 724 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 508 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 283 m²/s²
- 0-3 km storm-relative helicity
- 314 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.4
What forecasters said that day
The local office's own words before this flash flood watch 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 flash flood watch went out at Sep 21, 12:29 PM CDT, 2 hours 29 minutes earlier.
Area forecast discussion, Sep 21, 12:29 PM CDT, 2 hours 29 minutes before
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</html>Hazardous weather outlook, Sep 21, 12:52 PM CDT, 2 hours 6 minutes before
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Flash Flood Watches in Oklahoma, 2019Every flash flood watch in 2019
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.