Alert archive / Arkansas / Special Weather Statements in 2021

Special Weather Statement, NWS Tulsa, OK

April 28, 2021Crawford County, Franklin County, Madison County, Arkansas

NWS Tulsa, OK issued this special weather statement at Apr 28, 2021, 9:15 AM CDT for Crawford County, Franklin County, Madison County, Arkansas. It was in force for 45 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 28, 2021, 9:15 AM CDT (14:15 UTC)
Expired: Apr 28, 2021, 10:00 AM CDT
In force: 45 min
Issued by: NWS Tulsa, OK

Counties Crawford County, AR, Franklin County, AR, Madison County, AR

The radar

The Western Arkansas radar (KSRX), 74 km from the middle of the area, began a volume at 14:17 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, 2.3 hours before the alert went out and 120 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: 34 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1441 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 84 m²/s²
0-3 km storm-relative helicity: 127 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

002 
WWUS84 KTSA 281415
SPSTSA

Special Weather Statement
National Weather Service Tulsa OK
915 AM CDT Wed Apr 28 2021
 
ARZ010-011-019-020-029-281500-
Sebastian AR-Madison AR-Washington AR-Franklin AR-Crawford AR-
915 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR MADISON...FRANKLIN...CRAWFORD...
NORTHERN SEBASTIAN AND EASTERN WASHINGTON COUNTIES UNTIL 1000 AM
CDT...

At 915 AM CDT, strong thunderstorms were located along a line
extending from 7 miles west of Hindsville to near Fort Smith.
Movement was east at 25 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations in or near the path include...
Fort Smith...                     Fayetteville...
Van Buren...                      Ozark...
Huntsville...                     Cedarville...
Mountainburg...                   Alma...
Barling...                        Elkins...
West Fork...                      Mulberry...
Dyer...                           Altus...
Winslow...                        Chester...
St. Paul...                       Rudy...

This includes the following highways,
 Interstate 40 in Arkansas between mile markers 2 and 38.
 Interstate 540 between mile markers 1 and 11.
 Interstate 49 between mile markers 22 and 50.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Tornado Watch remains in effect until 1000 AM CDT for northwestern
Arkansas.

LAT...LON 3539 9381 3532 9443 3542 9443 3620 9403
      3620 9361 3619 9359 3616 9359 3615 9356
TIME...MOT...LOC 1415Z 258DEG 23KT 3615 9399 3539 9438 

$$

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 28, 6:40 AM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, Apr 28, 6:40 AM CDT, 2 hours 35 minutes before

Area Forecast Discussion
National Weather Service Tulsa OK
640 AM CDT Wed Apr 28 2021

.AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
VFR cigs in place at TAF initiation will lower to MVFR categories
through the morning, along with periods of rain and thunder.
MVFR/IFR cigs and vsbys will prevail through the period in
RA/+RA and thunder. RA/TSRA is expected to end from west to east
after beginning 04-05z and will be accompanied with a windshift the
west northwest as a cold front moves through those sites.
Behind the front, IFR cigs will prevail for the remainder
of the period

&&

.PREV DISCUSSION... /Issued 430 AM CDT Wed Apr 28 2021/

DISCUSSION...
Several rounds of showers and thunderstorms will continue through
tonight, before ending from northwest to southeast late tonight
and Thursday as a cold front pushes through the area. An almost
tropical like airmass is in place over the area with deep
moisture, low LCL's, and moderate to strong low level shear. This
has resulted in rather innocuous looking storms showing low level
rotation overnight. The main severe weather threat through the
morning will continue to be tornadoes from low-topped convection.

Outflow boundaries from morning convection will likely determine
where any severe storms may fire later this afternoon into the
evening. The overall best severe parameters will likely be to our
southwest though. Locally heavy rainfall will be a bigger concern
in our area by later today and tonight, with both flash flooding
and main-stem river flooding possible depending on just where the
heavier rain swaths set up.

We will dry out later Thursday through Saturday, but the model
consensus has shifted much farther north with the track of the
upper system once it finally ejects out of northern Mexico or
southwest Texas. Thus shower and thunderstorm chances will return
Sunday as this system moves over or near the area.

Another storm system may affect the area early next week, but the
usual timing differences exist, so pops have been kept on the
lower side for now.

Stayed fairly close to the National Blend of Models forecast.

PREV DISCUSSION... /Issued 1234 AM CDT Wed Apr 28 2021/

AVIATION...
CONCERNING TAF SITES KTUL/KRVS/KBVO/KMLC/KXNA/KFYV/KFSM/KROG.
VFR cigs will gradually lower to MVFR categories overnight as
areal coverage of rain and thunder begin to increase.
MVFR/IFR cigs and vsbys will prevail through the period in periods
of RA/+RA and thunder. RA/TSRA is expected to end late in the
period across the NE OK sites as a cold front moves through
those sites.

&&

.PRELIMINARY POINT TEMPS/POPS...
TUL   74  60  73  51 / 100  90  30  10
FSM   78  63  75  53 / 100  90  80  20
MLC   76  61  73  52 / 100  90  60  20
BVO   74  58  73  48 /  90  80  20  10
FYV   73  61  71  47 / 100  90  60  10
BYV   72  61  71  49 / 100  90  60  10
MKO   74  61  73  51 / 100  90  50  10
MIO   71  59  73  49 / 100  90  30  10
F10   74  59  73  51 / 100  90  40  10
HHW   80  63  73  55 /  60 100  80  30

&&

.TSA WATCHES/WARNINGS/ADVISORIES...
OK...Flood Watch through Thursday morning for OKZ049-053>076.

AR...Flood Watch through Thursday morning for ARZ001-002-010-011-019-
     020-029.

&&

AVIATION.....23

Hazardous weather outlook, Apr 28, 5:18 AM CDT, 3 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Tulsa OK
518 AM CDT Wed Apr 28 2021

ARZ001-002-010-011-019-020-029-OKZ049-053>076-291000-
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-
518 AM CDT Wed Apr 28 2021

...SEVERE STORMS AND FLOODING POSSIBLE THROUGH TONIGHT...

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...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Ongoing.

SEVERE THUNDERSTORM.
	RISK...Elevated.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Ongoing.

FLASH FLOOD.
	RISK...Limited.
	AREA...Eastern Oklahoma and Northwest Arkansas.
	ONSET...Ongoing.

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

	AREA AT GREATEST RISK...Southeast of Interstate 44.

DISCUSSION...
Several rounds of showers and thunderstorms will move across the
area today into tonight. Moderate to strong low level shear this
morning will result in a continued chance for rotating storms and
possibly a couple tornadoes. Renewed storm development is expected
later this afternoon into this evening, mainly along leftover
outflow boundaries from the morning storms, and also along a cold
front that will be moving into northeast Oklahoma this evening.
All severe hazards will be possible with these storms. The severe
weather threat is expected to diminish by late evening into the
overnight hours.

Widespread rainfall amounts of one to three inches are expected
through tonight, with locally higher amounts to around five
inches possible where persistent heavier bands of storms set up.
This will result in the potential for both flash flooding and
main-stem river 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...No Hazards.
SATURDAY through TUESDAY...Thunderstorm Potential.

EXTENDED DISCUSSION...
Showers and thunderstorms will gradually end from the northwest
Thursday. The main upper level storm system will finally move
northeast out of southwest Texas this weekend, and across our
area by Sunday, bringing a chance for showers and thunderstorms
late Saturday night and Sunday.

Another storm system will keep the chances for showers and
thunderstorms going into early next week.

weather.gov/tulsa contains additional information.

In the hours before

Local storm report, Apr 28, 8:42 AM CDT, 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
842 AM CDT WED APR 28 2021

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

0820 AM     FLASH FLOOD      ELM SPRINGS             36.21N 94.23W
04/28/2021                   WASHINGTON         AR   TRAINED SPOTTER

            REPORTS OF WATER COVERING ROADWAYS. A SCHOOL
            BUS STOPPED ON THE SIDE OF THE ROAD TO AVOID
            A FLOODED ROADWAY. REPORT OF FIREFIGHTERS
            RESPONDING TO ANOTHER VEHICLE CAUGHT IN
            FLOOD WATERS. REPORTS RELAYED VIA TWITTER.

&&

KAH

Local storm report, Apr 28, 8:43 AM CDT, 32 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
843 AM CDT WED APR 28 2021

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

0835 AM     FLASH FLOOD      TONTITOWN               36.18N 94.23W
04/28/2021                   WASHINGTON         AR   TRAINED SPOTTER

            REPORT RELAYED VIA TWITTER OF ROADWAYS IN
            TOWN COVERED BY WATER.

&&

KAH

Local storm report, Apr 28, 8:44 AM CDT, 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
844 AM CDT WED APR 28 2021

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

0709 AM     FLASH FLOOD      WESTVILLE               35.99N 94.57W
04/28/2021                   ADAIR              OK   STORM CHASER

            VIDEO SENT VIA TWITTER OF FLOODED STREETS IN
            WESTVILLE.

&&

KAH

Local storm report, Apr 28, 8:46 AM CDT, 29 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
846 AM CDT WED APR 28 2021

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

0800 AM     FLASH FLOOD      2 ENE LAKE FRANCIS      36.14N 94.49W
04/28/2021                   BENTON             AR   PUBLIC

            TWITTER REPORT OF PARTS OF HIGHWAY 16 NEAR
            THE ILLINOIS RIVER IMPASSABLE DUE TO FLOOD
            WATERS AND DEBRIS.

&&

KAH

Local storm report, Apr 28, 9:02 AM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TULSA OK
902 AM CDT WED APR 28 2021

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

0846 AM     FLASH FLOOD      3 SSW BENTONVILLE       36.33N 94.23W
04/28/2021                   BENTON             AR   PUBLIC

            STREETS FLOODED, CARS STRANDED. REPORTED
            6.44 INCHES OF RAIN IN 2 HOURS.

&&

KAH

Special weather statement, Apr 28, 9:15 AM CDT, 0 minutes before

Special Weather Statement
National Weather Service Tulsa OK
915 AM CDT Wed Apr 28 2021

ARZ010-011-019-020-029-281500-
Sebastian AR-Madison AR-Washington AR-Franklin AR-Crawford AR-
915 AM CDT Wed Apr 28 2021

...SIGNIFICANT WEATHER ADVISORY FOR MADISON...FRANKLIN...CRAWFORD...
NORTHERN SEBASTIAN AND EASTERN WASHINGTON COUNTIES UNTIL 1000 AM
CDT...

At 915 AM CDT, strong thunderstorms were located along a line
extending from 7 miles west of Hindsville to near Fort Smith.
Movement was east at 25 mph.

Winds in excess of 40 mph will be possible with these storms.

Locations in or near the path include...
Fort Smith...                     Fayetteville...
Van Buren...                      Ozark...
Huntsville...                     Cedarville...
Mountainburg...                   Alma...
Barling...                        Elkins...
West Fork...                      Mulberry...
Dyer...                           Altus...
Winslow...                        Chester...
St. Paul...                       Rudy...

This includes the following highways,
 Interstate 40 in Arkansas between mile markers 2 and 38.
 Interstate 540 between mile markers 1 and 11.
 Interstate 49 between mile markers 22 and 50.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

A Tornado Watch remains in effect until 1000 AM CDT for northwestern
Arkansas.

LAT...LON 3539 9381 3532 9443 3542 9443 3620 9403
      3620 9361 3619 9359 3616 9359 3615 9356
TIME...MOT...LOC 1415Z 258DEG 23KT 3615 9399 3539 9438

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 28, 1:54 AM CDT	Special Weather Statement	TSA	Craig, Osage, Rogers, Washington	21 min
Apr 28, 2:16 AM CDT	Special Weather Statement	TSA	Craig	29 min
Apr 28, 2:20 AM CDT	Tornado Warning	TSA	Okfuskee, Okmulgee	40 min
Apr 28, 2:57 AM CDT	Tornado Warning	TSA	Muskogee, Okmulgee	15 min
Apr 28, 5:12 AM CDT	Special Weather Statement	TSA	Adair	33 min
Apr 28, 5:19 AM CDT	Special Weather Statement	TSA	Okmulgee	26 min
Apr 28, 5:22 AM CDT	Special Weather Statement	TSA	Sequoyah	23 min
Apr 28, 5:44 AM CDT	Special Weather Statement	TSA	Okmulgee	16 min
Apr 28, 5:48 AM CDT	Special Weather Statement	TSA	Adair	27 min
Apr 28, 5:52 AM CDT	Tornado Warning	TSA	Adair	38 min
Apr 28, 5:54 AM CDT	Special Weather Statement	TSA	McIntosh	36 min
Apr 28, 6:03 AM CDT	Special Weather Statement	TSA	Sequoyah	27 min
Apr 28, 6:23 AM CDT	Special Weather Statement	TSA	McIntosh	37 min
Apr 28, 6:26 AM CDT	Tornado Warning	TSA	Adair	18 min
Apr 28, 6:45 AM CDT	Areal Flood Advisory	TSA	Adair, Cherokee, Muskogee, Sequoyah	5 hr
Apr 28, 6:53 AM CDT	Special Weather Statement	TSA	Muskogee	52 min
Apr 28, 7:43 AM CDT	Special Weather Statement	TSA	Adair, Sequoyah	47 min
Apr 28, 7:52 AM CDT	Flash Flood Warning	TSA	Adair, Cherokee	5 hr
Apr 28, 8:29 AM CDT	Flash Flood Warning	TSA	Adair	4 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Adair, Cherokee, Delaware	47 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Cherokee	64 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Cherokee	11 hr
Apr 28, 9:15 AM CDT	River Flood Warning	TSA	Adair, Delaware	41 hr
Apr 28, 9:18 AM CDT	River Flood Advisory	TSA	Cherokee, Delaware	23 hr
Apr 28, 9:22 AM CDT	River Flood Warning	TSA	Creek	7 hr
Apr 28, 9:35 AM CDT	Special Weather Statement	TSA	Pittsburg	40 min
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Sequoyah	41 hr
Apr 28, 10:01 AM CDT	River Flood Warning	TSA	Okmulgee	16 hr
Apr 28, 10:14 AM CDT	Special Weather Statement	TSA	McIntosh, Pittsburg	46 min
Apr 28, 10:38 AM CDT	Areal Flood Advisory	TSA	McIntosh, Pittsburg	3 hr
Apr 28, 10:40 AM CDT	Tornado Warning	TSA	McIntosh, Pittsburg	35 min
Apr 28, 10:49 AM CDT	Flash Flood Warning	TSA	Haskell, McIntosh, Muskogee, Pittsburg, Sequoyah	4 hr
Apr 28, 11:09 AM CDT	Tornado Warning	TSA	Haskell, McIntosh, Pittsburg	31 min
Apr 28, 11:42 AM CDT	Special Weather Statement	TSA	Haskell	33 min
Apr 28, 12:32 PM CDT	Areal Flood Warning	TSA	Adair, Cherokee, Delaware, Haskell, Latimer, McIntosh and 3 more	9 hr
Apr 28, 4:36 PM CDT	River Flood Warning	TSA	LeFlore	3 days
Apr 28, 6:47 AM CDT	Special Weather Statement	TSA	Washington	43 min
Apr 28, 7:04 AM CDT	Special Weather Statement	TSA	Benton	26 min
Apr 28, 7:20 AM CDT	Areal Flood Advisory	TSA	Benton, Washington	4 hr
Apr 28, 7:34 AM CDT	Special Weather Statement	TSA	Benton	26 min
Apr 28, 7:47 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll	43 min
Apr 28, 7:58 AM CDT	Special Weather Statement	TSA	Benton	32 min
Apr 28, 8:03 AM CDT	Tornado Warning Tornado observed	TSA	Benton	27 min
Apr 28, 8:13 AM CDT	Tornado Warning	TSA	Carroll	22 min
Apr 28, 8:16 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Washington	44 min
Apr 28, 8:27 AM CDT	Special Weather Statement	TSA	Crawford, Washington	48 min
Apr 28, 8:40 AM CDT	Severe Thunderstorm Warning	TSA	Benton, Carroll, Madison, Washington	50 min
Apr 28, 9:04 AM CDT	Severe Thunderstorm Warning	TSA	Carroll	26 min
Apr 28, 9:26 AM CDT	Special Weather Statement	TSA	Carroll	19 min
Apr 28, 9:42 AM CDT	Areal Flood Advisory	TSA	Carroll, Madison, Washington	3 hr
Apr 28, 9:56 AM CDT	Special Weather Statement	TSA	Carroll, Franklin, Madison	34 min
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Crawford, Sebastian	41 hr
Apr 28, 9:58 AM CDT	River Flood Warning	TSA	Franklin, Johnson, Logan	70 hr
Apr 28, 10:34 AM CDT	Special Weather Statement	TSA	Franklin	41 min
Apr 28, 11:34 AM CDT	Areal Flood Advisory	TSA	Crawford, Franklin	3 hr
Apr 28, 11:52 AM CDT	Flash Flood Warning	TSA	Benton, Carroll, Crawford, Franklin, Madison, Washington	8 hr
Apr 28, 4:42 PM CDT	River Flood Advisory	TSA	Crawford, Franklin	19 hr

Nearby

Special Weather Statements in Arkansas, 2021 Every special weather statement in 2021

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.