Alert archive / Oklahoma / Flash Flood Watches in 2019

Flash Flood Watch 3, NWS Tulsa, OK

May 2, 201919 counties in Oklahoma; 4 counties in Arkansas

NWS Tulsa, OK issued this flash flood watch at May 2, 2019, 4:21 AM CDT for 19 counties in Oklahoma; 4 counties in Arkansas. It took effect at May 3, 2019, 7:00 AM CDT. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: May 2, 2019, 4:21 AM CDT (09:21 UTC)
In effect from: May 3, 2019, 7:00 AM CDT
Expired: May 3, 2019, 9:48 PM CDT
In force: 15 hr
Issued by: NWS Tulsa, OK
Flood severity: None

All 23 counties

Benton County, AR, Carroll County, AR, Madison County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Choctaw County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Pushmataha County, OK, Rogers County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 57 km from the middle of the area, began a volume at 09:23 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 00:00Z, 9.4 hours before the alert went out and 177 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1603 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 995 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

Open this sounding in Storm Lab

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 May 2, 12:01 AM CDT, 4 hours 20 minutes earlier.

Area forecast discussion, May 2, 12:01 AM CDT, 4 hours 20 minutes before

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Hazardous weather outlook, May 1, 4:53 PM CDT, 11 hours 28 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
453 PM CDT Wed May 1 2019

ARZ001-002-010-011-019-020-029-OKZ049-053>076-021030-
Adair OK-Benton AR-Carroll AR-Cherokee OK-Choctaw OK-Craig OK-
Crawford AR-Creek OK-Delaware OK-Franklin AR-Haskell OK-Latimer OK-
Le Flore OK-Madison AR-Mayes OK-McIntosh OK-Muskogee OK-Nowata OK-
Okfuskee OK-Okmulgee OK-Osage OK-Ottawa OK-Pawnee OK-Pittsburg OK-
Pushmataha OK-Rogers OK-Sebastian AR-Sequoyah OK-Tulsa OK-Wagoner OK-
Washington OK-Washington AR-
453 PM CDT Wed May 1 2019

This Outlook is for Northwest and West Central Arkansas as well as
much of Eastern Oklahoma.

.DAY ONE...Today and Tonight.

TORNADO.
	RISK...Limited.
    AREA...Extreme Southeastern Oklahoma.
	ONSET...After 6 PM.

SEVERE THUNDERSTORM.
	RISK...Elevated.
	AREA...Eastern Oklahoma and Western Arkansas.
	ONSET...After 6 PM.

FLASH FLOOD.
	RISK...Limited.
	AREA...Eastern Oklahoma and Western Arkansas.
	ONSET...After 6 PM.

HEAVY RAIN.
	RISK...Limited.
	AREA...Eastern Oklahoma and Western Arkansas.
	ONSET...After 6 PM.

DISCUSSION...
Strong to severe thunderstorms have developed over south-central
Oklahoma this afternoon, and these storms may build to the east
during the early evening, affecting areas mainly south of
Interstate 40. These storms will be moving into a less favorable
environment for severe weather as they move east, however wind
fields continue to support some severe threat across southeast
Oklahoma, mainly in the form of large hail. At this time the
tornado threat appears to be minimal and confined to areas close
to the Red River.

Additional thunderstorms are expected to develop along a frontal
boundary to the northwest later tonight and move across the area
overnight. These storms will pose a limited threat of large hail
and damaging winds.

Given the recent heavy rainfall, any additional rain will make ongoing
flooding worse, and could lead to additional flash flooding.

SPOTTER AND EMERGENCY MANAGEMENT ACTION STATEMENT...
Activation of the Regional Spotter Network Likely.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.
THURSDAY...Thunderstorm Potential.
FRIDAY...Thunderstorm Potential...Heavy Rain Potential.
SATURDAY through SUNDAY...Thunderstorm Potential.
MONDAY...No Hazards.
TUESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Thunderstorm chances will persist Thursday and Friday as a moist
and unstable air-mass remains over the area. A few severe
thunderstorms will again be possible on Thursday, primarily
across southeast Oklahoma and northwest Arkansas.

weather.gov/tulsa contains additional information.

In the hours before

Special weather statement, May 2, 1:16 AM CDT, 3 hours 5 minutes before

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Special weather statement, May 2, 2:04 AM CDT, 2 hours 17 minutes before

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Local storm report, May 2, 2:23 AM CDT, 1 hour 58 minutes before

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Local storm report, May 2, 2:24 AM CDT, 1 hour 57 minutes before

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The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 1, 7:07 PM CDT	Special Weather Statement	TSA	Pushmataha	38 min
May 1, 7:30 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	45 min
May 1, 7:35 PM CDT	Special Weather Statement	TSA	Latimer	25 min
May 1, 7:42 PM CDT	Flash Flood Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	3 hr
May 1, 7:56 PM CDT	Special Weather Statement	TSA	Pushmataha	34 min
May 1, 7:57 PM CDT	Special Weather Statement	TSA	LeFlore	33 min
May 1, 8:13 PM CDT	Special Weather Statement	TSA	Choctaw	47 min
May 1, 8:37 PM CDT	Special Weather Statement	TSA	LeFlore	53 min
May 1, 9:30 PM CDT	Areal Flood Advisory	TSA	LeFlore	3 hr
May 1, 9:33 PM CDT	Special Weather Statement	TSA	LeFlore	42 min
May 1, 10:46 PM CDT	Areal Flood Warning	TSA	Latimer, LeFlore, Pittsburg, Pushmataha	21 hr
May 2, 1:16 AM CDT	Special Weather Statement	TSA	Adair	29 min
May 2, 3:32 AM CDT	River Flood Warning	TSA	LeFlore	17 hr
May 2, 2:04 AM CDT	Special Weather Statement	TSA	Benton	56 min
May 2, 9:09 AM CDT	River Flood Advisory	TSA	Franklin, Johnson, Logan	29 hr

Nearby

Flash Flood Watches in Oklahoma, 2019 Flash Flood Watches in Arkansas, 2019 Every 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.