Alert archive / Arkansas / Tornado Watches in 2015
Tornado Watch 161
The Storm Prediction Center issued this tornado watch at May 10, 2015, 7:34 PM CDT for 19 counties in Arkansas; McCurtain County, Oklahoma; 15 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 10, 2015, 7:34 PM CDT (00:34 UTC)
- Expired
- May 11, 2015, 12:00 AM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 35 counties
Clark County, AR, Dallas County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Saline County, AR, Scott County, AR, Sevier County, AR, Yell County, AR, McCurtain County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Red River County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 159 km from the middle of the area, began a volume at 00:37 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 8:03 PM CDT | Tornado Warning | SHV | Sevier | 42 min |
| May 10, 8:23 PM CDT | Severe Thunderstorm Warning | LZK | Polk | 37 min |
| May 10, 8:33 PM CDT | Tornado Warning | SHV | Howard, Sevier | 38 min |
| May 10, 8:55 PM CDT | Flash Flood Warning | LZK | Garland, Johnson, Logan, Montgomery, Newton, Perry and 4 more | 3 hr |
| May 10, 9:07 PM CDT | Severe Thunderstorm Warning | SHV | Smith, Wood | 53 min |
| May 10, 9:26 PM CDT | Tornado Warning | SHV | Smith, Wood | 29 min |
| May 10, 9:54 PM CDT | Tornado Warning | LZK | Montgomery, Polk, Scott, Yell | 36 min |
| May 10, 10:06 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Little River, Sevier | 39 min |
| May 10, 10:16 PM CDT | Severe Thunderstorm Warning | SHV | Smith, Upshur, Wood | 59 min |
| May 10, 10:19 PM CDT | Tornado Warning | SHV | Hempstead, Little River | 26 min |
| May 10, 10:26 PM CDT | Tornado Warning | SHV | Smith, Wood | 49 min |
| May 10, 10:27 PM CDT | Severe Thunderstorm Warning | LZK | Yell | 33 min |
| May 10, 10:35 PM CDT | Severe Thunderstorm Warning | LZK | Montgomery, Polk, Scott | 40 min |
| May 10, 10:43 PM CDT | Tornado Warning | SHV | Hempstead, Howard, Little River, Sevier | 32 min |
| May 10, 10:52 PM CDT | Severe Thunderstorm Warning | SHV | Cass, Harrison, Marion | 38 min |
| May 10, 10:59 PM CDT | Tornado Warning | SHV | Harrison, Marion | 46 min |
| May 10, 11:10 PM CDT | Severe Thunderstorm Warning | LZK | Logan, Montgomery, Polk, Scott, Yell | 50 min |
| May 10, 11:13 PM CDT | Tornado Warning | SHV | Hempstead, Howard | 32 min |
| May 10, 11:14 PM CDT | Severe Thunderstorm Warning | SHV | Camp, Smith, Upshur, Wood | 61 min |
| May 10, 11:22 PM CDT | Tornado Warning | SHV | Miller | 38 min |
| May 10, 11:38 PM CDT | Tornado Warning | SHV | Bowie, Red River, Titus | 37 min |
| May 10, 11:39 PM CDT | Flash Flood Warning | SHV | Smith, Upshur, Wood | 4 hr |
| May 10, 11:46 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Little River, Miller, Sevier | 44 min |
| May 10, 11:58 PM CDT | Tornado Warning | SHV | Miller | 36 min |
| May 10, 11:59 PM CDT | Flash Flood Warning | LZK | Johnson, Logan, Montgomery, Newton, Polk, Pope and 3 more | 3 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Shreveport, LA (KBAD), launched 00:00Z, 0.6 hours before the alert went out and 158 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
- 482 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1448 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 72 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 5.7
The text
As transmitted, in the capitals the NWS used until 2016.
318 WWUS20 KWNS 110031 SEL1 SPC WW 110031 ARZ000-OKZ000-TXZ000-110500- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 161 NWS STORM PREDICTION CENTER NORMAN OK 735 PM CDT SUN MAY 10 2015 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF SOUTHWEST INTO CENTRAL ARKANSAS SOUTHEAST OKLAHOMA NORTHEAST TEXAS * EFFECTIVE THIS SUNDAY NIGHT FROM 735 PM UNTIL MIDNIGHT CDT. * PRIMARY THREATS INCLUDE... A COUPLE TORNADOES POSSIBLE ISOLATED VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE ISOLATED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE SUMMARY...SEVERE THUNDERSTORMS ONGOING OVER NORTH-CENTRAL TEXAS AND SOUTHEAST OKLAHOMA ARE EXPECTED TO SPREAD NORTHEAST ACROSS THE WATCH AREA THIS EVENING. SUPERCELLS CAPABLE OF A COUPLE OF TORNADOES...LARGE HAIL AND DAMAGING STRAIGHT LINE WINDS ARE POSSIBLE. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 80 MILES WEST SOUTHWEST OF TEXARKANA ARKANSAS TO 25 MILES EAST NORTHEAST OF HOT SPRINGS ARKANSAS. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. && OTHER WATCH INFORMATION...CONTINUE...WW 155...WW 157...WW 159...WW 160... AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 22025. ...MEAD
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:08 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Dallas, Faulkner, Garland, Grant and 18 more | 97 min |
| May 10, 8:06 PM CDT | Mesoscale Discussion | SPC | Sebastian | 54 min |
| May 10, 9:57 PM CDT | Mesoscale Discussion | SPC | Clark, Columbia, Garland, Hempstead, Hot Spring, Howard and 12 more | 93 min |
| May 10, 11:31 PM CDT | Tornado Watch | SPC | Arkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 33 more | 5 hr |
| May 11, 2:31 AM CDT | Mesoscale Discussion | SPC | Edwards, Kerr, Kimble, Real, Sutton, Val Verde | 89 min |
| May 11, 2:55 AM CDT | Mesoscale Discussion | SPC | Angelina, Brazos, Burleson, Houston, Leon, Madison and 7 more | 95 min |
| May 11, 4:19 AM CDT | Severe Thunderstorm Watch | SPC | Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 18 more | 7 hr |
| May 11, 7:04 AM CDT | Mesoscale Discussion | SPC | Austin, Bandera, Bastrop, Bexar, Blanco, Burleson and 34 more | 56 min |
| May 11, 2:16 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bee, Bexar, Colorado, DeWitt, Dimmit and 18 more | 119 min |
Nearby
Tornado Watches in Arkansas, 2015Tornado Watches in Texas, 2015Tornado Watches in Oklahoma, 2015Every tornado watch in 2015
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.