Alert archive / Arkansas / Flash Flood Warnings in 2021

Flash Flood Warning 21, NWS Shreveport, LA

June 8, 2021Hempstead County, Nevada County, Arkansas

NWS Shreveport, LA issued this flash flood warning at Jun 8, 2021, 11:48 AM CDT for Hempstead County, Nevada 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: Jun 8, 2021, 11:48 AM CDT (16:48 UTC)
Expired: Jun 8, 2021, 1:59 PM CDT
In force: 2 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Hempstead County, AR, Nevada County, AR

The radar

The Shreveport radar (KSHV), 143 km from the middle of the area, began a volume at 16:46 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

Shreveport, LA (KSHV), launched 12:00Z, 4.8 hours before the alert went out and 139 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: 1621 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 580 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 218 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.1

Open this sounding in Storm Lab

The text

As transmitted.

169 
WGUS54 KSHV 081648
FFWSHV
ARC057-099-082045-
/O.NEW.KSHV.FF.W.0021.210608T1648Z-210608T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Shreveport LA
1148 AM CDT Tue Jun 8 2021

The National Weather Service in Shreveport has issued a

* Flash Flood Warning for...
  Hempstead County in southwestern Arkansas...
  Nevada County in southwestern Arkansas...

* Until 345 PM CDT.

* At 1148 AM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 2 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Doppler radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Hope, Prescott, Emmet, Blevins, Perrytown, Rosston, Fulton, 
  Washington, Willisville, Bodcaw, Bluff City, McCaskill, Ozan, 
  Cale, McNab, Oakhaven, Sutton, Laneburg, Boughton and Mount Moriah.

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Dangerous flash flooding is occurring or is imminent. Do not attempt 
to travel unless you are fleeing flood waters. If you are in an area 
subject to flooding, move to higher ground now.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, and other low lying 
spots.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3354 9381 3356 9380 3357 9383 3361 9382
      3363 9392 3365 9391 3365 9394 3367 9397
      3372 9395 3374 9397 3375 9383 3401 9382
      3394 9353 3396 9338 3390 9330 3384 9329
      3379 9318 3382 9314 3378 9310 3354 9311

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

04

1 follow-up statement

660 
WGUS74 KSHV 081859
FFSSHV

Flash Flood Statement
National Weather Service Shreveport LA
159 PM CDT Tue Jun 8 2021

ARC057-099-081909-
/O.CAN.KSHV.FF.W.0021.000000T0000Z-210608T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Hempstead AR-Nevada AR-
159 PM CDT Tue Jun 8 2021

...FLASH FLOOD WARNING IS CANCELLED FOR HEMPSTEAD AND NEVADA 
COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flash Flood Watch remains in effect until 700 AM CDT Wednesday for 
portions of Arkansas...southeast Oklahoma and northeast Texas.

LAT...LON 3354 9381 3356 9380 3357 9383 3361 9382
      3363 9392 3365 9391 3365 9394 3367 9397
      3372 9395 3374 9397 3375 9383 3401 9382
      3394 9353 3396 9338 3390 9330 3384 9329
      3379 9318 3382 9314 3378 9310 3354 9311

$$

04

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 7, 8:47 PM CDT	River Flood Warning	SHV	Little River, Sevier	4 days
Jun 7, 8:47 PM CDT	River Flood Warning	SHV	Howard, Little River, Sevier	5 days
Jun 8, 5:13 AM CDT	River Flood Warning	SHV	Little River	52 hr
Jun 8, 5:33 AM CDT	Areal Flood Advisory	SHV	Sevier	3 hr
Jun 8, 7:30 AM CDT	Flash Flood Warning Considerable damage threat	SHV	Sevier	4 hr
Jun 8, 9:40 AM CDT	Flash Flood Warning Considerable damage threat	SHV	Howard, Little River, Sevier	3 hr
Jun 8, 11:00 AM CDT	Areal Flood Warning	SHV	Sevier	6 hr
Jun 8, 11:27 AM CDT	Special Weather Statement	SHV	Hempstead, Nevada	48 min
Jun 8, 12:31 PM CDT	Special Weather Statement	SHV	Nevada	44 min
Jun 8, 4:59 PM CDT	Areal Flood Advisory	SHV	Nevada	2 hr

Nearby

Flash Flood Warnings in Arkansas, 2021 Every flash flood warning 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.