Alert archive / Arkansas / Tornado Warnings in 2017
Tornado Warning 56, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Apr 21, 2017, 11:47 PM CDT for Hempstead County, Howard County, Sevier County, Arkansas. It was in force for 43 min. 1 report 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
- Apr 21, 2017, 11:47 PM CDT (04:47 UTC)
- Expired
- Apr 22, 2017, 12:30 AM CDT
- In force
- 43 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 1.0 in
Counties Hempstead County, AR, Howard County, AR, Sevier County, AR
The radar
The Shreveport radar (KSHV), 152 km from the middle of the area, began a volume at 04:49 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 |
|---|---|---|---|
| Apr 22, 12:03 AM CDT | HAIL 1 | 3 E Tollette, AR |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 21, 4:40 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Shreveport, LA (KBAD), launched 00:00Z, 4.8 hours before the alert went out and 149 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
- 828 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 1486 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 75 m²/s²
- 0-3 km storm-relative helicity
- 143 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.5
The text
As transmitted.
318
WFUS54 KSHV 220447
TORSHV
ARC057-061-133-220530-
/O.NEW.KSHV.TO.W.0056.170422T0447Z-170422T0530Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Shreveport LA
1147 PM CDT FRI APR 21 2017
The National Weather Service in Shreveport has issued a
* Tornado Warning for...
North central Hempstead County in southwestern Arkansas...
Southeastern Sevier County in southwestern Arkansas...
Southeastern Howard County in southwestern Arkansas...
* Until 1230 AM CDT
* At 1147 PM CDT, a severe thunderstorm capable of producing a
tornado was located near Ben Lomond, or 8 miles southwest of
Mineral Springs, moving east at 30 mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* Locations impacted include...
Mineral Springs, Tollette, Ben Lomond, Saratoga and Browntown.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3390 9377 3374 9378 3376 9398 3377 9404
3378 9404 3378 9407 3379 9411 3387 9411
TIME...MOT...LOC 0447Z 272DEG 25KT 3382 9405
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
061 follow-up statement
749
WWUS54 KSHV 220511
SVSSHV
Severe Weather Statement
National Weather Service Shreveport LA
1211 AM CDT SAT APR 22 2017
ARC133-220520-
/O.CAN.KSHV.TO.W.0056.000000T0000Z-170422T0530Z/
Sevier AR-
1211 AM CDT SAT APR 22 2017
...THE TORNADO WARNING FOR SOUTHEASTERN SEVIER COUNTY IS CANCELLED...
The tornadic thunderstorm which prompted the warning has moved out
of the warned area. Therefore, the warning has been cancelled.
A tornado watch remains in effect until 100 AM CDT for southwestern
Arkansas.
LAT...LON 3390 9377 3374 9378 3376 9389 3379 9394
3382 9396 3389 9393
TIME...MOT...LOC 0510Z 271DEG 24KT 3382 9389
$$
ARC057-061-220530-
/O.CON.KSHV.TO.W.0056.000000T0000Z-170422T0530Z/
Hempstead AR-Howard AR-
1211 AM CDT SAT APR 22 2017
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT FOR NORTH
CENTRAL HEMPSTEAD AND SOUTHEASTERN HOWARD COUNTIES...
At 1210 AM CDT, a severe thunderstorm capable of producing a tornado
was located over Tollette, or near Mineral Springs, moving east at 25
mph.
HAZARD...Tornado and quarter size hail.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed. Damage
to roofs, windows, and vehicles will occur. Tree damage is
likely.
Locations impacted include...
Mineral Springs and Tollette.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Tornadoes are extremely difficult to see and confirm at night. Do not
wait to see or hear the tornado. TAKE COVER NOW!
&&
LAT...LON 3390 9377 3374 9378 3376 9389 3379 9394
3382 9396 3389 9393
TIME...MOT...LOC 0510Z 271DEG 24KT 3382 9389
TORNADO...RADAR INDICATED
HAIL...1.00IN
$$
06The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 9:52 PM CDT | Lake Wind Advisory | SHV | Columbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more | 17 hr |
| Apr 21, 10:46 PM CDT | Severe Thunderstorm Warning | SHV | Little River, Sevier | 59 min |
| Apr 21, 11:24 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Little River, Sevier | 66 min |
| Apr 21, 11:41 PM CDT | Special Weather Statement | SHV | Little River | 49 min |
| Apr 22, 12:30 AM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Nevada | 60 min |
| Apr 22, 12:39 AM CDT | Special Weather Statement | SHV | Little River | 36 min |
| Apr 22, 12:45 AM CDT | Special Weather Statement | SHV | Sevier | 45 min |
| Apr 22, 1:33 AM CDT | Special Weather Statement | SHV | Hempstead | 42 min |
| Apr 22, 2:18 AM CDT | Special Weather Statement | SHV | Hempstead | 42 min |
Nearby
Tornado Warnings in Arkansas, 2017Every tornado warning in 2017Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.