Alert archive / Arkansas / Flash Flood Warnings in 2017
Flash Flood Warning 71, NWS Little Rock, AR
NWS Little Rock, AR issued this flash flood warning at Aug 20, 2017, 6:40 PM CDT for Logan County, Arkansas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 20, 2017, 6:40 PM CDT (23:40 UTC)
- Expired
- Aug 20, 2017, 8:45 PM CDT
- In force
- 2 hr
- Issued by
- NWS Little Rock, AR
- Area
- Storm-based polygon
- Flood severity
- None
County Logan County, AR
The radar
The Western Arkansas radar (KSRX), 45 km from the middle of the area, began a volume at 23:43 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Springfield, MO (KSGF), launched 12:00Z, 11.7 hours before the alert went out and 180 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
- 3491 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 1000 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 83 m²/s²
- Significant tornado parameter
- 1.1
- Supercell composite
- 5.3
The text
As transmitted.
012
WGUS54 KLZK 202340
FFWLZK
ARC083-210145-
/O.NEW.KLZK.FF.W.0071.170820T2340Z-170821T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Little Rock AR
640 PM CDT SUN AUG 20 2017
The National Weather Service in Little Rock has issued a
* Flash Flood Warning for...
Central Logan County in western Arkansas...
* Until 845 PM CDT
* At 639 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. One to two inches of rain has
already fallen. Flash flooding is likely to occur. An additional 1
to 2 inches may be seen over the next 1 to 2 hours.
* Some locations that will experience flooding include...
Paris... Magazine...
Ratcliff... Caulksville...
Roseville... Driggs...
Carbon City... Chismville...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3523 9395 3523 9392 3529 9392 3532 9391
3531 9381 3536 9381 3541 9380 3534 9372
3515 9377 3521 9396
$$
591 follow-up statement
606
WGUS74 KLZK 210122
FFSLZK
Flash Flood Statement
National Weather Service Little Rock AR
822 PM CDT SUN AUG 20 2017
ARC083-210129-
/O.CAN.KLZK.FF.W.0071.000000T0000Z-170821T0145Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Logan AR-
822 PM CDT SUN AUG 20 2017
...THE FLASH FLOOD WARNING FOR CENTRAL LOGAN COUNTY IS CANCELLED...
The heavy rain has ended and the flash flooding threat has
significantly lowered. Localized water on roadways may still be seen
and localized minor flooding may be seen, but the heavy rain has
ended and any flooding should be very limited and no longer expected
to pose a threat. Please continue to heed any remaining road
closures if applicable.
LAT...LON 3523 9395 3523 9392 3529 9392 3532 9391
3531 9381 3536 9381 3541 9380 3534 9372
3515 9377 3521 9396
$$
59What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Little Rock, AR wrote its last area forecast discussion before this flash flood warning went out at Aug 20, 2:54 PM CDT, 3 hours 46 minutes earlier.
Area forecast discussion, Aug 20, 2:54 PM CDT, 3 hours 46 minutes before
Area Forecast Discussion...Update National Weather Service Little Rock AR 640 PM CDT PM Sun Aug 20 2017 .Aviation... Overall VFR flight conditions are expected in the next 24 hours. Patchy MVFR may be seen early Monday morning, especially around KADF, but it will be spotty. Winds will be light from the southeast at 5 mph or less this evening and overnight, or light and variable. Winds on Monday will be southeast to southwest at 5 to 10 mph. Isolated convection will be possible Monday afternoon to evening. (59) && .Prev Discussion.../ Issued 254 PM CDT Sun Aug 20 2017/ .SHORT TERM...Today Through Tuesday Another hot day across much of Arkansas today, with readings in the 90s across the entire state. The only exception to this would be a few rain cooled sites across mainly northern and northeast Arkansas where scattered thunderstorms have developed. These storms have actually formed on a residual outflow boundary from a complex of thunderstorms that moved out of northeast KS and northwest MO overnight. Storms will persist mainly during the daylight hours, with perhaps a few storms persisting into late evening. Arkansas will remain on the western periphery of a mid level ridge Monday into Tuesday, with surface ridging in place just to the southeast of the state. During the day Tuesday, a surface front will make its way toward Arkansas from the north and the mid/upper level flow across the region begins to turn more northerly. Rain chances will increase from north to south with this feature. For the solar eclipse fans across our forecast area Monday, not much change was made to the ongoing forecast. It will feel unpleasant outside with temps mostly in the lower 90s and heat indices around 100 degrees. Looks like we will see partly to occasionally mostly cloudy sky conditions for a good portion of the area. But, similar to today, there should be plenty of breaks in the clouds and even some places with few clouds especially during the beginning of the eclipse, which should enhance viewing. Some isolated to scattered showers and thunderstorms may be seen as well. && .LONG TERM...Tuesday Night Through Friday Scattered to numerous showers/storms will be ongoing acrs much of AR on Wed, as the aforementioned CDFNT wl be working SWD thru the state. Models are in good agreement with general timing of the fntl bndry, pushing it well S of AR by Thu. Still cannot rule out a few strong/severe storms with this system. Left some lingering rain chances across SRN half of the FA Wed ngt. Sfc high pressure will build into the region for the remainder of the work week. The high center wl actually track acrs the Great Lakes region and into the NERN states, with AR being on the S/SERN periphery. This wl result in a return to below normal temps, with highs mainly in the 80s, and lows in the upper 50s/upper 60s. Does appear that the high's influence wl weaken enough heading into next weekend, to allow warmer and more humid air to begin returning to the FA. && .PRELIMINARY POINT TEMPS/POPS... Batesville AR 75 93 75 92 / 20 30 10 40 Camden AR 75 94 74 93 / 10 30 10 30 Harrison AR 72 90 72 87 / 20 30 10 60 Hot Springs AR 75 93 75 93 / 10 30 10 30 Little Rock AR 76 93 76 93 / 10 30 10 30 Monticello AR 76 93 76 93 / 10 30 10 30 Mount Ida AR 73 93 73 93 / 10 30 10 30 Mountain Home AR 72 92 73 88 / 20 30 10 60 Newport AR 75 92 75 91 / 20 30 10 40 Pine Bluff AR 75 93 75 92 / 10 30 10 30 Russellville AR 74 94 74 92 / 10 30 10 40 Searcy AR 74 94 74 93 / 20 30 10 30 Stuttgart AR 75 93 75 93 / 10 30 10 30 && .LZK Watches/Warnings/Advisories... Heat Advisory until 7 PM CDT this evening FOR Arkansas-Bradley- Calhoun-Clark-Cleveland-Conway-Dallas-Desha-Drew-Faulkner- Garland-Grant-Hot Spring-Jackson-Jefferson-Johnson-Lincoln-Logan- Lonoke-Monroe-Montgomery-Ouachita-Perry-Pike-Polk-Pope-Prairie- Pulaski-Saline-Scott-White-Woodruff-Yell. && Short Term...67 / Long Term...44
Hazardous weather outlook, Aug 20, 3:16 AM CDT, 15 hours 24 minutes before
Hazardous Weather Outlook National Weather Service Little Rock AR 316 AM CDT Sun Aug 20 2017 ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-211000- Boone-Marion-Baxter-Fulton-Sharp-Newton-Searcy-Stone-Izard- Independence-Johnson-Pope-Van Buren-Cleburne-Jackson-Logan-Conway- Faulkner-White-Woodruff-Scott-Yell-Perry-Polk-Montgomery-Garland- Saline-Pulaski-Lonoke-Prairie-Monroe-Pike-Clark-Hot Spring-Grant- Jefferson-Arkansas-Dallas-Cleveland-Lincoln-Desha-Ouachita- Calhoun-Bradley-Drew- 316 AM CDT Sun Aug 20 2017 This Hazardous Weather Outlook is for a Large Part of Arkansas. .DAY ONE...Today and Tonight Afternoon heat index values will rise to near or just over 105 degrees across much of central and southern Arkansas. Take frequent breaks if working outside...especially during the hottest part of the day. Isolated thunderstorms will also be possible this afternoon across the area. The overall threat for organized severe weather is not expected at this time. However...an isolated strong storm may be seen...with gusty winds and locally heavy rainfall possible with the strongest storms. .DAYS TWO THROUGH SEVEN...Monday Through Saturday Afternoon heat index values of 100 to 105 will be possible over central and southern Arkansas Monday and Tuesday. Take frequent breaks if working outside...especially during the hottest part of the day. Rain chances will increase by late Tuesday...as a cold front moves into the region. At this time...the threat for severe thunderstorms is low. However...isolated storms could become strong...with gusty winds and locally heavy rainfall the primary concerns. Dry weather will return by Thursday...as the front moves south of the region. .Spotter Information Statement... Spotter activation will not be needed. && Visit NWS Little Rock on the web. Go to http://weather.gov/lzk. 62/57
In the hours before
Special weather statement, Aug 20, 1:40 PM CDT, 5 hours before
Special Weather Statement National Weather Service Little Rock AR 140 PM CDT SUN AUG 20 2017 ARZ004-005-201915- Baxter AR-Marion AR- 140 PM CDT SUN AUG 20 2017 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MARION AND NORTHERN BAXTER COUNTIES UNTIL 215 PM CDT... At 140 PM CDT, Doppler radar was tracking a strong thunderstorm over Lakeview in Baxter County, or over Bull Shoals, moving east at 30 mph. Dime size hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Mountain Home... Bull Shoals... Gassville... Flippin... Lakeview in Baxter County... Salesville... Briarcliff... Arkawana... Norfork Dam... Ozark Regional Airport... Gamaliel Landing... Fawn Park... Bull Shoals State Park... Colfax... Diamond Bay... Cotter... Midway in Baxter County... Fairview in Marion County... Gamaliel... Robinson Point Landing... PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. If on or near Bull Shoals Lake, get out of the water and move indoors or inside a vehicle. Remember, lightning can strike out to 10 miles from the parent thunderstorm. If you can hear thunder, you are close enough to be struck by lightning. Move to safe shelter now! Do not be caught on the water in a thunderstorm. && LAT...LON 3627 9265 3640 9266 3650 9221 3624 9223 TIME...MOT...LOC 1840Z 257DEG 28KT 3636 9255 67
Special weather statement, Aug 20, 2:33 PM CDT, 4 hours 7 minutes before
Special Weather Statement National Weather Service Little Rock AR 233 PM CDT SUN AUG 20 2017 ARZ016-025-202030- Independence AR-Jackson AR- 233 PM CDT SUN AUG 20 2017 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN INDEPENDENCE AND NORTHEASTERN JACKSON COUNTIES UNTIL 330 PM CDT... At 233 PM CDT, Doppler radar was tracking a strong thunderstorm 7 miles south of Strawberry, or 16 miles north of Newport, moving southeast at 20 mph. Half inch hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Newport... Tuckerman... Swifton... Grubbs... Campbell Station... Dowdy... Stegall... Kenyon... Elgin... Cord... PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 3553 9104 3581 9143 3589 9140 3588 9104 TIME...MOT...LOC 1933Z 303DEG 19KT 3585 9130 44
Special weather statement, Aug 20, 5:40 PM CDT, 1 hour before
Special Weather Statement
National Weather Service Little Rock AR
540 PM CDT SUN AUG 20 2017
ARZ034-047-202330-
Monroe AR-Woodruff AR-
540 PM CDT SUN AUG 20 2017
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN WOODRUFF AND
NORTHEASTERN MONROE COUNTIES UNTIL 630 PM CDT...
At 540 PM CDT, Doppler radar was tracking a strong thunderstorm near
Hunter, or 7 miles north of Brinkley, moving southeast at 5 mph.
Winds in excess of 40 mph will be possible with this storm.
Locations impacted include...
Brinkley... Hunter...
Alfrey... Cotton Plant...
Fargo... Zent...
LAT...LON 3500 9115 3492 9115 3491 9111 3487 9111
3487 9110 3485 9110 3477 9122 3499 9128
3507 9110 3501 9104 3500 9105
TIME...MOT...LOC 2240Z 322DEG 5KT 3499 9122
51Special weather statement, Aug 20, 5:56 PM CDT, 44 minutes before
Special Weather Statement
National Weather Service Little Rock AR
556 PM CDT SUN AUG 20 2017
ARZ030-202330-
Logan AR-
556 PM CDT SUN AUG 20 2017
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LOGAN AND NORTHWESTERN
YELL COUNTIES UNTIL 630 PM CDT...
At 555 PM CDT, Doppler radar was tracking a strong thunderstorm near
Ratcliff, or 7 miles north of Booneville, moving east at 10 mph.
Small hail from pea up to half inch and winds in excess of 40 mph
will be possible with this storm. Heavy rain will also be seen with
the storms and localized flooding of low lying areas and ponding of
water on roadways will be possible.
Locations impacted include...
Paris... Magazine...
Ratcliff... Blue Mountain...
Mount Magazine... Caulksville...
Driggs... Carbon City...
Chismville... Corley...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3523 9399 3523 9392 3530 9392 3532 9391
3525 9355 3514 9359 3515 9366 3513 9367
3513 9370 3512 9371 3522 9400
TIME...MOT...LOC 2255Z 285DEG 18KT 3524 9390
59Special weather statement, Aug 20, 6:28 PM CDT, 12 minutes before
Special Weather Statement
National Weather Service Little Rock AR
628 PM CDT SUN AUG 20 2017
ARZ030-210000-
Logan AR-
628 PM CDT SUN AUG 20 2017
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LOGAN COUNTY UNTIL 700 PM
CDT...
At 626 PM CDT, Doppler radar was tracking a strong thunderstorm near
Ratcliff, or 7 miles north of Booneville, moving east at 10 mph.
Small hail from pea up to half inch and winds in excess of 40 mph
will be possible with this storm. Heavy rain will also be seen with
the storm and localized flooding of low lying areas and ponding of
water on roadways will be possible.
Locations impacted include...
Paris... Magazine...
Ratcliff... Caulksville...
Driggs... Carbon City...
Chismville...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Very heavy rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3520 9398 3523 9397 3523 9392 3530 9392
3532 9391 3531 9381 3535 9381 3537 9367
3511 9374
TIME...MOT...LOC 2326Z 285DEG 17KT 3524 9387
59The office that day
Everything else NWS Little Rock, AR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 10:16 PM CDT | Special Weather Statement | LZK | Boone | 29 min |
| Aug 20, 12:31 PM CDT | Special Weather Statement | LZK | Independence | 44 min |
| Aug 20, 12:35 PM CDT | Special Weather Statement | LZK | Boone | 40 min |
| Aug 20, 1:40 PM CDT | Special Weather Statement | LZK | Baxter | 35 min |
| Aug 20, 1:46 PM CDT | Severe Thunderstorm Warning | LZK | Independence, Sharp | 44 min |
| Aug 20, 2:33 PM CDT | Special Weather Statement | LZK | Jackson | 57 min |
| Aug 20, 5:40 PM CDT | Special Weather Statement | LZK | Monroe | 50 min |
| Aug 20, 5:56 PM CDT | Special Weather Statement | LZK | Logan | 34 min |
| Aug 20, 6:28 PM CDT | Special Weather Statement | LZK | Logan | 32 min |
Nearby
Flash Flood Warnings in Arkansas, 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.