Alert archive / Alabama / Tornado Warnings in 2019

Tornado Warning 27, NWS Huntsville, AL

May 9, 2019DeKalb County, Jackson County, Alabama

NWS Huntsville, AL issued this tornado warning at May 9, 2019, 1:45 PM CDT for DeKalb County, Jackson County, Alabama. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 9, 2019, 1:45 PM CDT (18:45 UTC)
Expired: May 9, 2019, 2:30 PM CDT
In force: 45 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 0.0 in

Counties DeKalb County, AL, Jackson County, AL

The radar

The Northeast Alabama radar (KHTX), 38 km from the middle of the area, began a volume at 18:48 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

Birmingham, AL (KBMX), launched 12:00Z, 6.8 hours before the alert went out and 179 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: 24 J/kg
Mixed-layer CIN: -200 J/kg
Mixed-layer LCL: 827 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 156 m²/s²
0-3 km storm-relative helicity: 284 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Huntsville, AL wrote its last area forecast discussion before this tornado warning went out at May 9, 1:14 PM CDT, 31 minutes earlier.

Area forecast discussion, May 9, 1:14 PM CDT, 31 minutes before

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Hazardous weather outlook, May 9, 1:04 PM CDT, 41 minutes before

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In the hours before

Special weather statement, May 9, 12:28 PM CDT, 1 hour 17 minutes before

Special Weather Statement
National Weather Service Huntsville AL
1228 PM CDT Thu May 9 2019

ALZ006-009-091800-
Madison AL-Jackson AL-
1228 PM CDT Thu May 9 2019

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL JACKSON AND MADISON
COUNTIES UNTIL 100 PM CDT...

At 1228 PM CDT, Doppler radar was tracking a strong thunderstorm over
Madison, moving northeast at 45 mph.

Wind gusts up to 50 mph will be possible with this storm.

Locations impacted include...
Huntsville, Madison, Moores Mill, Redstone Arsenal, Meridianville,
Hazel Green, Owens Cross Roads, Gurley, Triana and Marshall Space
Flight Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Strong gusty winds will be capable of knocking down small tree limbs
along with other small unsecured items. Seek safe shelter until this
storm has passed.

Very heavy rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3474 8617 3457 8656 3458 8658 3458 8661
      3455 8664 3455 8666 3459 8669 3459 8671
      3457 8674 3463 8679 3479 8679 3499 8653
      3499 8646
TIME...MOT...LOC 1728Z 238DEG 38KT 3469 8672

JMS

Local storm report, May 9, 1:06 PM CDT, 39 minutes before

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Local storm report, May 9, 1:14 PM CDT, 31 minutes before

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Local storm report, May 9, 1:18 PM CDT, 27 minutes before

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Local storm report, May 9, 1:26 PM CDT, 19 minutes before

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Local storm report, May 9, 1:36 PM CDT, 9 minutes before

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The office that day

Everything else NWS Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 9, 11:17 AM CDT	Special Weather Statement	HUN	Lawrence	43 min
May 9, 11:25 AM CDT	Severe Thunderstorm Warning	HUN	Lawrence	35 min
May 9, 11:55 AM CDT	Special Weather Statement	HUN	Limestone, Morgan	35 min
May 9, 12:09 PM CDT	Special Weather Statement	HUN	Cullman	36 min
May 9, 12:28 PM CDT	Special Weather Statement	HUN	Madison	32 min
May 9, 12:32 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Limestone, Madison, Morgan	28 min
May 9, 12:36 PM CDT	Tornado Warning	HUN	Madison	24 min
May 9, 12:46 PM CDT	Tornado Warning	HUN	Madison	29 min
May 9, 12:53 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	37 min
May 9, 12:59 PM CDT	Tornado Warning	HUN	Jackson, Madison	31 min
May 9, 1:08 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson, Madison, Marshall	52 min
May 9, 1:18 PM CDT	Tornado Warning	HUN	DeKalb, Marshall	27 min
May 9, 1:24 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	36 min
May 9, 1:37 PM CDT	Tornado Warning	HUN	DeKalb	38 min
May 9, 1:46 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	59 min
May 9, 1:55 PM CDT	Severe Thunderstorm Warning	HUN	Jackson	35 min
May 9, 12:51 PM CDT	Tornado Warning	HUN	Lincoln, Moore	24 min
May 9, 1:02 PM CDT	Tornado Warning	HUN	Franklin, Lincoln, Moore	28 min

Nearby

Tornado Warnings in Alabama, 2019 Every tornado warning in 2019 Tornadoes in 2019

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.