Alert archive / Arkansas / Tornado Watches in 2021
Tornado Watch 60
The Storm Prediction Center issued this tornado watch at Mar 27, 2021, 3:25 PM CDT for 37 counties in Arkansas; 11 parishes in Louisiana; 17 counties in Texas. It was in force for 10 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 27, 2021, 3:25 PM CDT (20:25 UTC)
- Expired
- Mar 28, 2021, 1:00 AM CDT
- In force
- 10 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 65 counties
Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Lonoke County, AR, Miller County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Sevier County, AR, Union County, AR, White County, AR, Woodruff County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Red River Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, 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, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Wood County, TX
The radar
The Little Rock radar (KLZK), 156 km from the middle of the area, began a volume at 20:28 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
- 70%
- One or more EF2 to EF5 tornadoes
- 60%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 40%
- Ten or more severe hail reports
- 90%
- One or more hailstones of 2 inches or more
- 80%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
63 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 4:06 PM CDT | Severe Thunderstorm Warning | LZK | Clark, Ouachita | 39 min |
| Mar 27, 4:37 PM CDT | Severe Thunderstorm Warning | LZK | Clark, Dallas, Ouachita | 38 min |
| Mar 27, 5:05 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Howard, Little River, Sevier | 40 min |
| Mar 27, 5:08 PM CDT | Severe Thunderstorm Warning | LZK | Lonoke, Prairie, Pulaski | 37 min |
| Mar 27, 5:11 PM CDT | Severe Thunderstorm Warning | LZK | Cleveland, Dallas, Grant, Hot Spring, Jefferson, Saline | 49 min |
| Mar 27, 5:21 PM CDT | Severe Thunderstorm Warning | LZK | Woodruff | 24 min |
| Mar 27, 5:27 PM CDT | Severe Thunderstorm Warning | LZK | Lonoke, Prairie | 48 min |
| Mar 27, 5:30 PM CDT | Severe Thunderstorm Warning | LZK | Monroe, Prairie, Woodruff | 45 min |
| Mar 27, 5:34 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Nevada | 26 min |
| Mar 27, 5:37 PM CDT | Severe Thunderstorm Warning | LZK | Grant, Lonoke, Pulaski, Saline | 53 min |
| Mar 27, 5:55 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Nacogdoches, Rusk | 50 min |
| Mar 27, 5:56 PM CDT | Flash Flood Warning | LZK | Lonoke, Monroe, Prairie, Woodruff | 3 hr |
| Mar 27, 5:57 PM CDT | Severe Thunderstorm Warning | LZK | Jackson, Lonoke, Prairie, White, Woodruff | 48 min |
| Mar 27, 5:59 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Nevada | 23 min |
| Mar 27, 6:02 PM CDT | Severe Thunderstorm Warning | LZK | Arkansas, Jefferson, Lonoke, Monroe, Prairie | 43 min |
| Mar 27, 6:03 PM CDT | Tornado Warning | SHV | Cherokee | 27 min |
| Mar 27, 6:04 PM CDT | Severe Thunderstorm Warning | LZK | Clark, Pike | 41 min |
| Mar 27, 6:09 PM CDT | Severe Thunderstorm Warning | LZK | Monroe, Prairie, Woodruff | 51 min |
| Mar 27, 6:12 PM CDT | Severe Thunderstorm Warning | LZK | Lonoke, Prairie, Pulaski, White | 48 min |
| Mar 27, 6:24 PM CDT | Severe Thunderstorm Warning | LZK | Clark, Dallas, Hot Spring, Ouachita | 51 min |
| Mar 27, 6:27 PM CDT | Tornado Warning | SHV | Cherokee, Nacogdoches, Rusk | 48 min |
| Mar 27, 6:31 PM CDT | Severe Thunderstorm Warning | SHV | Bowie, Cass | 59 min |
| Mar 27, 6:37 PM CDT | Severe Thunderstorm Warning | LZK | Arkansas, Jefferson, Lonoke, Monroe, Prairie | 38 min |
| Mar 27, 6:42 PM CDT | Severe Thunderstorm Warning | LZK | Monroe, Woodruff | 37 min |
| Mar 27, 6:48 PM CDT | Tornado Warning | LZK | Arkansas, Monroe, Prairie | 42 min |
| Mar 27, 6:50 PM CDT | Severe Thunderstorm Warning | LZK | White | 40 min |
| Mar 27, 6:54 PM CDT | Tornado Warning | SHV | Panola, Rusk, Shelby | 51 min |
| Mar 27, 6:58 PM CDT | Severe Thunderstorm Warning | LZK | Cleveland, Dallas, Grant, Jefferson | 47 min |
| Mar 27, 7:00 PM CDT | Tornado Warning | LZK | Cleveland, Dallas, Grant, Jefferson | 45 min |
| Mar 27, 7:12 PM CDT | Severe Thunderstorm Warning | LZK | Bradley, Calhoun, Cleveland, Dallas, Ouachita | 48 min |
| Mar 27, 7:20 PM CDT | Severe Thunderstorm Warning | SHV | Hempstead, Lafayette, Miller | 40 min |
| Mar 27, 7:22 PM CDT | Severe Thunderstorm Warning | LZK | Independence, Jackson, Lawrence | 38 min |
| Mar 27, 7:23 PM CDT | Flash Flood Warning | LZK | Clark, Cleveland, Dallas, Grant, Hot Spring, Jefferson and 1 more | 3 hr |
| Mar 27, 7:24 PM CDT | Severe Thunderstorm Warning | LZK | Independence, Izard, Jackson, Sharp, White, Woodruff | 51 min |
| Mar 27, 7:25 PM CDT | Tornado Warning | LZK | Bradley, Calhoun, Cleveland, Dallas, Ouachita | 35 min |
| Mar 27, 7:31 PM CDT | Tornado Warning | SHV | Harrison, Marion | 44 min |
| Mar 27, 7:34 PM CDT | Tornado Warning | LZK | Arkansas, Cleveland, Jefferson, Lincoln | 41 min |
| Mar 27, 7:39 PM CDT | Tornado Warning | SHV | Caddo, De Soto | 51 min |
| Mar 27, 7:56 PM CDT | Tornado Warning | LZK | Bradley, Cleveland, Drew, Lincoln | 49 min |
| Mar 27, 7:56 PM CDT | Severe Thunderstorm Warning | SHV | Columbia, Hempstead, Lafayette, Miller, Nevada | 49 min |
| Mar 27, 8:04 PM CDT | Tornado Warning | SHV | Bossier, Caddo | 41 min |
| Mar 27, 8:07 PM CDT | Tornado Warning | LZK | Arkansas, Desha, Jefferson, Lincoln, Monroe | 53 min |
| Mar 27, 8:11 PM CDT | Tornado Warning | SHV | Caddo, De Soto | 49 min |
| Mar 27, 8:13 PM CDT | Severe Thunderstorm Warning | LZK | Independence, Jackson, Lawrence, Randolph | 32 min |
| Mar 27, 8:20 PM CDT | Severe Thunderstorm Warning | LZK | Calhoun, Ouachita | 55 min |
| Mar 27, 8:41 PM CDT | Tornado Warning | LZK | Arkansas, Desha, Drew, Lincoln | 49 min |
| Mar 27, 8:46 PM CDT | Tornado Warning | SHV | Bienville, Bossier, Caddo, Webster | 19 min |
| Mar 27, 8:49 PM CDT | Tornado Warning | LZK | Arkansas, Monroe | 29 min |
| Mar 27, 9:08 PM CDT | Severe Thunderstorm Warning | LZK | Bradley, Calhoun, Ouachita | 53 min |
| Mar 27, 9:21 PM CDT | Flash Flood Warning | LZK | Ouachita | 3 hr |
| Mar 27, 9:26 PM CDT | Tornado Warning | LZK | Arkansas, Desha | 34 min |
| Mar 27, 9:32 PM CDT | Tornado Warning | LZK | Bradley, Calhoun | 43 min |
| Mar 27, 9:47 PM CDT | Flash Flood Warning | LZK | Bradley, Calhoun, Cleveland, Dallas, Ouachita | 4 hr |
| Mar 27, 9:52 PM CDT | Severe Thunderstorm Warning | SHV | Harrison, Panola, Rusk | 53 min |
| Mar 27, 9:57 PM CDT | Tornado Warning | LZK | Bradley, Cleveland, Drew, Lincoln | 48 min |
| Mar 27, 10:23 PM CDT | Severe Thunderstorm Warning | SHV | Union | 67 min |
| Mar 27, 10:34 PM CDT | Severe Thunderstorm Warning | LZK | Desha, Drew | 56 min |
| Mar 27, 10:39 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 51 min |
| Mar 27, 10:59 PM CDT | Severe Thunderstorm Warning | JAN | Chicot | 61 min |
| Mar 27, 11:22 PM CDT | Severe Thunderstorm Warning | JAN | Ashley, Chicot | 53 min |
| Mar 27, 11:30 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Claiborne, Webster | 45 min |
| Mar 28, 12:09 AM CDT | Severe Thunderstorm Warning | LZK | Desha, Drew | 24 min |
| Mar 28, 12:11 AM CDT | Severe Thunderstorm Warning | JAN | Ashley, Chicot | 27 min |
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 (KSHV), launched 12:00Z, 8.4 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
- 951 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 670 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 5.6
The text
As transmitted.
356
WWUS20 KWNS 272021
SEL0
SPC WW 272021
ARZ000-LAZ000-MSZ000-TXZ000-280400-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 60
NWS Storm Prediction Center Norman OK
320 PM CDT Sat Mar 27 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Southern and eastern Arkansas
Northern Louisiana
Extreme northwestern Mississippi
Northeastern Texas
* Effective this Saturday afternoon and evening from 320 PM until
1100 PM CDT.
* Primary threats include...
A few tornadoes and a couple intense tornadoes likely
Widespread large hail and scattered very large hail events to 3
inches in diameter likely
Scattered damaging winds likely with isolated significant gusts
to 75 mph possible
SUMMARY...Scattered supercell development is expected this afternoon
from northeastern Texas across northwestern Louisiana into southern
and eastern Arkansas. The storms will persist through late evening
and expand in coverage, with the potential to produce very large
hail, damaging winds, and several tornadoes. A couple of strong
tornadoes will be possible, mainly later this evening across
southeast Arkansas.
The tornado watch area is approximately along and 75 statute miles
north and south of a line from 55 miles east northeast of Pine Bluff
AR to 25 miles west northwest of Longview TX. For a complete
depiction of the watch see the associated watch outline update
(WOUS64 KWNS WOU0).
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 58...WW 59...
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 550. Mean
storm motion vector 24030.
...ThompsonSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 27, 11:55 AM CDT | Mesoscale Discussion | SPC | Crittenden, Cross, Lee, Mississippi, Poinsett, St. Francis | 3 hr |
| Mar 27, 1:51 PM CDT | Tornado Watch | SPC | Crittenden, Cross, Lee, Mississippi, Phillips, Poinsett and 1 more | 7 hr |
| Mar 27, 2:16 PM CDT | Mesoscale Discussion | SPC | Arkansas, Ashley, Bradley, Calhoun, Clark, Cleveland and 26 more | 89 min |
| Mar 27, 6:42 PM CDT | Mesoscale Discussion | SPC | Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 29 more | 2 hr |
| Mar 27, 4:34 PM CDT | Mesoscale Discussion | SPC | Anderson, Brazos, Freestone, Henderson, Hopkins, Houston and 9 more | 116 min |
Nearby
Tornado Watches in Arkansas, 2021Tornado Watches in Texas, 2021Tornado Watches in Louisiana, 2021Every tornado watch 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.