Alert archive / Arkansas / Flash Flood Warnings in 2018
Flash Flood Warning 13, NWS Shreveport, LA
NWS Shreveport, LA issued this flash flood warning at Feb 21, 2018, 3:52 PM CST for 4 counties in Arkansas. It was in force for 113 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Feb 21, 2018, 3:52 PM CST (21:52 UTC)
- Expired
- Feb 21, 2018, 5:45 PM CST
- In force
- 113 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Hempstead County, AR, Howard County, AR, Little River County, AR, Sevier County, AR
The radar
The Shreveport radar (KSHV), 147 km from the middle of the area, began a volume at 21:51 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 21, 5:30 PM CST | FLASH FLOOD | 7 Nw Patmos, AR | HIGH WATER OVER ROAD REPORTED AT HEMPSTEAD 5 NEAR SPRINGHILL, AR. |
| Feb 21, 5:32 PM CST | FLASH FLOOD | 1 Nnw Perrytown, AR | FLOODING REPORTED ON HEMPSTEAD 243. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Shreveport, LA (KBAD), launched 12:00Z, 9.9 hours before the alert went out and 145 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
- 1043 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 529 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 151 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.1
The text
As transmitted.
458
WGUS54 KSHV 212152
FFWSHV
ARC057-061-081-133-212345-
/O.NEW.KSHV.FF.W.0013.180221T2152Z-180221T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Shreveport LA
352 PM CST WED FEB 21 2018
The National Weather Service in Shreveport has issued a
* Flash Flood Warning for...
Southeastern Little River County in southwestern Arkansas...
Hempstead County in southwestern Arkansas...
Eastern Sevier County in southwestern Arkansas...
Howard County in southwestern Arkansas...
* Until 545 PM CST
* At 351 PM CST, Doppler radar indicated heavy rain across the
warned area. Three to four inches of rain have already fallen.
Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
Hope, Ashdown, Nashville, Mineral Springs, Dierks, Umpire,
Lockesburg, Emmet, Wilton, Blevins, Perrytown, Tollette, Fulton,
Washington, Ogden, Ben Lomond, Corinth, Center Point, Saratoga and
Athens.
Additional rainfall amounts of one to two are possible in the warned
area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Please report flooding to your local law enforcement agency when you
can do so safely.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3435 9394 3419 9392 3418 9382 3401 9382
3396 9346 3348 9349 3348 9372 3352 9375
3350 9377 3361 9382 3358 9393 3355 9394
3358 9397 3353 9399 3356 9400 3359 9418
3356 9419 3356 9425 3435 9414
$$
19The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 21, 9:30 AM CST | Areal Flood Advisory | SHV | Howard, Little River, Sevier | 3 hr |
| Feb 21, 9:57 AM CST | River Flood Warning | SHV | Little River, Sevier | 6 days |
| Feb 21, 9:57 AM CST | River Flood Warning | SHV | Howard, Little River, Sevier | 7 days |
| Feb 21, 10:04 AM CST | River Flood Warning | SHV | Little River | 5 days |
| Feb 21, 11:31 AM CST | Flash Flood Warning | SHV | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 2 more | 3 hr |
| Feb 21, 2:38 PM CST | Flash Flood Warning | SHV | Columbia, Nevada, Union | 16 hr |
Nearby
Flash Flood Warnings in Arkansas, 2018Every flash flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.