Alert archive / Oklahoma / Special Weather Statements in 2017

Special Weather Statement, NWS Tulsa, OK

April 21, 2017Okfuskee County, Oklahoma

NWS Tulsa, OK issued this special weather statement at Apr 21, 2017, 9:30 AM CDT for Okfuskee County, Oklahoma. It was in force for 30 min. 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 21, 2017, 9:30 AM CDT (14:30 UTC)
Expired: Apr 21, 2017, 10:00 AM CDT
In force: 30 min
Issued by: NWS Tulsa, OK

County Okfuskee County, OK

The radar

The Norman radar (KTLX), 72 km from the middle of the area, began a volume at 14:33 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, 2.5 hours before the alert went out and 290 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: -171 m²/s²
0-3 km storm-relative helicity: -150 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Apr 21, 6:55 AM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, Apr 21, 6:55 AM CDT, 2 hours 35 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
655 AM CDT Fri Apr 21 2017

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
Initial convective complex currently moving through northwest Arkansas
this morning with IFR conditions in the stronger storms. Multiple rounds
of showers/thunderstorms expected across E OK/NW AR today through
the evening hours. Storms should begin clearing NW OK by mid
evening and shift east of AR TAF sites shortly after midnight.

&&

.PREV DISCUSSION... /Issued 307 AM CDT Fri Apr 21 2017/

DISCUSSION...
Early morning water vapor imagery showed progressive shortwave
trough moving across northeastern New Mexico and over the OK/TX
panhandles. The surface front extended from a low southwest of
Midland northeast to near Wichita Falls through southeast
Oklahoma. Elevated storms are ongoing across northeast Oklahoma,
forming along and north of the 850mb front. So far these storms
have been below severe limits. Most areas have received up to a
half inch of rain with isolated amounts over an inch.

The main concern today will be additional heavy rain and the
potential for flooding. There are several rivers in our area which
are forecast to have minor or moderate flooding based on forecast
precipitation amounts. The NAM shows the heaviest QPF axis farther
north across far northeast Oklahoma into northwest Arkansas while
the ECMWF is a bit farther south. It does appear that widespread
2-3" amounts will occur today with locally higher amounts. We will
add Sequoyah and McIntosh counties to the ongoing Flood Watch.

As far as severe weather, the better potential is south of I-40.
The front will not lift north in areas where there has been
recent or ongoing convection. There are some storms approaching
from central OK that could produce isolated large hail across
mainly east central Oklahoma this morning. If storms can initiate
later this afternoon along the stalled front in southern
Oklahoma, they could affect mainly southeast Oklahoma by late
afternoon.

Short wave trough axis will be over northeast Oklahoma tonight,
which will drive the boundary south and bring an end to the rain
by early Saturday morning. Temperatures on Saturday will be quite
chilly compared to recent days, with highs in the 50s and lows on
Sunday morning in the upper 30s to mid 40s. Sunday will bring a
return to sunshine and a warmup, with the next chance for
precipitation arriving by Wednesday.

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch through this evening for OKZ054>072.

AR...Flood Watch through this evening for ARZ001-002-010-011.

&&

SHORT TERM...12
AVIATION...12

Hazardous weather outlook, Apr 21, 4:59 AM CDT, 4 hours 31 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
459 AM CDT Fri Apr 21 2017

ARZ001-002-010-011-019-020-029-OKZ049-053>076-221000-
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-
459 AM CDT Fri Apr 21 2017

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....Southeast Oklahoma
	ONSET....This afternoon.

SEVERE THUNDERSTORM.
	RISK...Elevated.
	AREA...Eastern Oklahoma and northwest Arkansas.
    ONSET...This afternoon.

FLASH FLOOD.
    RISK...Elevated.
    AREA...Eastern Oklahoma and northwest Arkansas.
    ONSET...This afternoon.

HEAVY RAIN.
	RISK...Significant.
	AREA...Eastern Oklahoma and northwest Arkansas.
	ONSET...Ongoing.

DISCUSSION...
A cluster of strong thunderstorms with locally heavy rain will
continue spreading across eastern Oklahoma into northwest
Arkansas this morning as a front stalls over the region. Small
hail, gusty winds and locally heavy rainfall will be likely in the
stronger storms.

Additional strong to severe thunderstorms are expected to develop
across portions of eastern Oklahoma this afternoon in association
with an approaching upper level jet streak moving out of the
central Rockies. The convective line will sweep across southeast
Oklahoma and northwest Arkansas late this afternoon into the
evening hours with large hail, damaging winds and heavy rainfall.
A tornado or two will also be possible across southeast Oklahoma,
possibly extending into west-central Arkansas.

Flash flooding will become a significant concern with widespread
2 to 4 inches of rainfall expected through tonight with locally 6
inches possible. The heavy rainfall and severe weather threat
will begin to diminish after midnight as storms move east of the
area.

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

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.
SATURDAY and Sunday...No Hazards.
MONDAY...High Wind Potential.
TUESDAY...No Hazards.
WEDNESDAY and Thursday...Thunderstorm Potential.

EXTENDED DISCUSSION...
Cooler conditions are expected behind the front through the weekend
as high pressure builds into the region. Shower and thunderstorm
chances will return Wednesday into Thursday of next week as another
storm system approaches from the west.

weather.gov/tulsa Contains additional information.

In the hours before

Local storm report, Apr 21, 7:04 AM CDT, 2 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
704 AM CDT FRI APR 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0550 AM     TSTM WND GST     1 S WEBBERS FALLS       35.50N 95.13W
04/21/2017  M72 MPH          MUSKOGEE           OK   MESONET

&&

JDS

Local storm report, Apr 21, 7:39 AM CDT, 1 hour 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
739 AM CDT FRI APR 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0649 AM     TSTM WND DMG     BARLING                 35.33N 94.30W
04/21/2017                   SEBASTIAN          AR   BROADCAST MEDIA

            REPORT OF WOMAN TRAPPED AFTER TREE FELL ON CAMPER
            TRAILER. TIME ESTIMATED VIA RADAR.

&&

PMM

Local storm report, Apr 21, 8:07 AM CDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
807 AM CDT FRI APR 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0727 AM     TSTM WND DMG     1 SSW OZARK             35.47N 93.84W
04/21/2017                   FRANKLIN           AR   LAW ENFORCEMENT

            HWY 23 BLOCKED DUE TO FALLEN TREES. LOCATION ESTIMATED
            VIA RADAR.

&&

PMM

Local storm report, Apr 21, 8:09 AM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
809 AM CDT FRI APR 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0646 AM     TSTM WND DMG     FORT SMITH              35.39N 94.40W
04/21/2017                   SEBASTIAN          AR   LAW ENFORCEMENT

            POWER LINES DOWN IN FORT SMITH. TIME ESTIMATED VIA RADAR.

&&

PMM

Local storm report, Apr 21, 8:31 AM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
831 AM CDT FRI APR 21 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0656 AM     TSTM WND DMG     ALMA                    35.48N 94.22W
04/21/2017                   CRAWFORD           AR   PUBLIC

            LARGE PORTION OF TREE DOWN IN ALMA. TIME ESTIMATED VIA
            RADAR.

&&

PMM

Special weather statement, Apr 21, 9:30 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
930 AM CDT FRI APR 21 2017

OKZ064-065-211500-
Okfuskee OK-Creek OK-
930 AM CDT FRI APR 21 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL CREEK AND OKFUSKEE
COUNTIES UNTIL 1000 AM CDT...

At 930 AM CDT, a strong thunderstorm was located near Prague, moving
northeast at 55 mph.

Dime size hail and winds in excess of 40 mph will be possible with
this storm.

Locations in or near the path include...
Okemah...                         Okfuskee...
Boley...                          Paden...
Bearden...                        Castle...
Welty...                          Mason...

This includes Interstate 40 in Oklahoma between mile markers 212 and
224.

LAT...LON 3561 9662 3578 9629 3545 9616 3533 9644
      3546 9644 3546 9647 3543 9650 3543 9652
      3546 9654 3544 9657 3543 9656 3542 9656
      3541 9654 3539 9654 3541 9658 3540 9662
TIME...MOT...LOC 1430Z 239DEG 49KT 3545 9668

Lacy

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 21, 1:50 AM CDT	River Flood Warning	TSA	Ottawa	3 days
Apr 21, 1:53 AM CDT	River Flood Warning	TSA	Adair, Delaware	47 hr
Apr 21, 1:53 AM CDT	River Flood Warning	TSA	Cherokee	70 hr
Apr 21, 1:58 AM CDT	River Flood Advisory	TSA	Adair, Cherokee, Delaware	36 hr
Apr 21, 3:29 AM CDT	Special Weather Statement	TSA	Creek	31 min
Apr 21, 3:44 AM CDT	Severe Thunderstorm Warning	TSA	Creek, Okfuskee	46 min
Apr 21, 4:03 AM CDT	Special Weather Statement	TSA	Okfuskee	42 min
Apr 21, 4:16 AM CDT	Special Weather Statement	TSA	Okmulgee	29 min
Apr 21, 4:42 AM CDT	Special Weather Statement	TSA	McIntosh, Muskogee, Okmulgee	48 min
Apr 21, 5:35 AM CDT	Special Weather Statement	TSA	Muskogee	40 min
Apr 21, 5:49 AM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, Muskogee, Sequoyah	41 min
Apr 21, 6:22 AM CDT	Severe Thunderstorm Warning	TSA	Adair, LeFlore, Sequoyah	38 min
Apr 21, 8:43 AM CDT	River Flood Warning	TSA	Osage, Tulsa	42 hr
Apr 21, 8:43 AM CDT	River Flood Warning	TSA	Rogers, Tulsa	54 hr
Apr 21, 8:52 AM CDT	River Flood Warning	TSA	Adair, Cherokee, Delaware	56 hr
Apr 21, 9:01 AM CDT	River Flood Advisory	TSA	Cherokee, Delaware	34 hr
Apr 21, 9:01 AM CDT	River Flood Advisory	TSA	Tulsa	52 hr
Apr 21, 9:51 AM CDT	Areal Flood Advisory	TSA	Ottawa	3 hr
Apr 21, 9:57 AM CDT	Areal Flood Advisory	TSA	Creek, Rogers, Tulsa, Wagoner	3 hr
Apr 21, 10:08 AM CDT	Severe Thunderstorm Warning	TSA	Okfuskee, Okmulgee	67 min
Apr 21, 10:10 AM CDT	Special Weather Statement	TSA	Creek	65 min
Apr 21, 10:23 AM CDT	Special Weather Statement	TSA	Okmulgee	37 min
Apr 21, 11:00 AM CDT	Severe Thunderstorm Warning	TSA	McIntosh, Muskogee, Okfuskee, Okmulgee, Pittsburg	45 min
Apr 21, 11:03 AM CDT	Special Weather Statement	TSA	Tulsa, Wagoner	42 min
Apr 21, 11:18 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Mayes, Muskogee, Okmulgee, Rogers, Tulsa and 1 more	42 min
Apr 21, 11:39 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Haskell, Latimer, McIntosh, Muskogee, Pittsburg and 1 more	51 min
Apr 21, 11:51 AM CDT	Severe Thunderstorm Warning	TSA	Cherokee, Delaware, Mayes, Muskogee, Wagoner	39 min
Apr 21, 11:53 AM CDT	Flash Flood Warning	TSA	Creek, Rogers, Tulsa, Wagoner	3 hr
Apr 21, 12:07 PM CDT	Areal Flood Advisory	TSA	Cherokee	113 min
Apr 21, 12:10 PM CDT	Severe Thunderstorm Warning	TSA	Haskell, Latimer, LeFlore, Pushmataha	35 min
Apr 21, 12:16 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee, Haskell, LeFlore, Sequoyah	44 min
Apr 21, 12:23 PM CDT	Areal Flood Advisory	TSA	Adair	112 min
Apr 21, 12:38 PM CDT	Severe Thunderstorm Warning	TSA	Latimer, LeFlore, Pushmataha, Sequoyah	52 min
Apr 21, 12:50 PM CDT	Areal Flood Advisory	TSA	Delaware	3 hr
Apr 21, 1:50 PM CDT	River Flood Warning	TSA	Osage	14 hr
Apr 21, 2:03 PM CDT	River Flood Warning	TSA	Ottawa	58 hr
Apr 21, 2:13 PM CDT	Special Weather Statement	TSA	Creek	32 min
Apr 21, 2:15 PM CDT	River Flood Warning	TSA	Creek	24 hr
Apr 21, 2:19 PM CDT	River Flood Warning	TSA	Tulsa	47 hr
Apr 21, 2:23 PM CDT	River Flood Warning	TSA	Washington	37 hr
Apr 21, 2:41 PM CDT	Special Weather Statement	TSA	Creek	34 min
Apr 21, 2:49 PM CDT	Severe Thunderstorm Warning	TSA	Creek, Tulsa	41 min
Apr 21, 2:53 PM CDT	Special Weather Statement	TSA	Creek	37 min
Apr 21, 3:20 PM CDT	Special Weather Statement	TSA	Wagoner	40 min
Apr 21, 3:27 PM CDT	Areal Flood Advisory	TSA	Creek, Tulsa	3 hr
Apr 21, 3:57 PM CDT	Areal Flood Advisory	TSA	Mayes, Rogers, Wagoner	5 hr
Apr 21, 4:38 PM CDT	Special Weather Statement	TSA	Muskogee	37 min
Apr 21, 5:19 PM CDT	Special Weather Statement	TSA	Muskogee	41 min
Apr 21, 5:35 PM CDT	Severe Thunderstorm Warning	TSA	Pittsburg	55 min
Apr 21, 5:47 PM CDT	Severe Thunderstorm Warning	TSA	Adair, Cherokee	43 min
Apr 21, 6:21 PM CDT	Special Weather Statement	TSA	Pittsburg	39 min
Apr 21, 6:30 PM CDT	Areal Flood Advisory	TSA	Creek, Tulsa	2 hr
Apr 21, 6:38 PM CDT	Special Weather Statement	TSA	Haskell	37 min
Apr 21, 6:56 PM CDT	Severe Thunderstorm Warning	TSA	Choctaw	49 min
Apr 21, 6:57 PM CDT	Severe Thunderstorm Warning	TSA	Pushmataha	48 min
Apr 21, 6:42 AM CDT	Special Weather Statement	TSA	Washington	33 min
Apr 21, 7:00 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin, Sebastian, Washington	30 min
Apr 21, 7:25 AM CDT	Severe Thunderstorm Warning	TSA	Crawford, Franklin	35 min
Apr 21, 12:57 PM CDT	Special Weather Statement	TSA	Crawford, Franklin	48 min
Apr 21, 1:29 PM CDT	Special Weather Statement	TSA	Sebastian	31 min
Apr 21, 2:24 PM CDT	Areal Flood Advisory	TSA	Carroll, Madison	111 min
Apr 21, 2:36 PM CDT	River Flood Advisory	TSA	Crawford, Franklin	34 hr
Apr 21, 6:19 PM CDT	Special Weather Statement	TSA	Crawford	41 min

Nearby

Special Weather Statements in Oklahoma, 2017 Every special weather statement 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.