Alert archive / Texas / Flash Flood Warnings in 2009

Flash Flood Warning 50, NWS Shreveport, LA

July 28, 2009Harrison County, Marion County, Texas

NWS Shreveport, LA issued this flash flood warning at Jul 28, 2009, 2:07 PM CDT for Harrison County, Marion County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 28, 2009, 2:07 PM CDT (19:07 UTC)
Expired: Jul 28, 2009, 5:00 PM CDT
In force: 3 hr
Issued by: NWS Shreveport, LA
Area: Storm-based polygon
Flood severity: None

Counties Harrison County, TX, Marion County, TX

The radar

The Shreveport radar (KSHV), 55 km from the middle of the area, began a volume at 19:08 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, 7.1 hours before the alert went out and 61 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: 1892 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 472 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 216 m²/s²
0-3 km storm-relative helicity: 320 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 10.1

Open this sounding in Storm Lab

What forecasters said that day

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

NWS Shreveport, LA wrote its last area forecast discussion before this flash flood warning went out at Jul 28, 11:35 AM CDT, 2 hours 32 minutes earlier.

Area forecast discussion, Jul 28, 11:35 AM CDT, 2 hours 32 minutes before

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Hazardous weather outlook, Jul 28, 12:18 PM CDT, 1 hour 49 minutes before

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In the hours before

Local storm report, Jul 28, 11:29 AM CDT, 2 hours 38 minutes before

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Local storm report, Jul 28, 11:44 AM CDT, 2 hours 23 minutes before

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Local storm report, Jul 28, 11:47 AM CDT, 2 hours 20 minutes before

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Local storm report, Jul 28, 12:05 PM CDT, 2 hours 2 minutes before

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Local storm report, Jul 28, 12:25 PM CDT, 1 hour 42 minutes before

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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Jul 28, 1:45 PM CDT, 22 minutes before

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      <p id="message1">
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      </p>
      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 12:41 AM CDT	Areal Flood Advisory	SHV	Upshur	3 hr
Jul 28, 1:18 AM CDT	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion	42 min
Jul 28, 4:39 AM CDT	Areal Flood Advisory	SHV	Bowie, Cass, Morris	3 hr
Jul 28, 7:45 AM CDT	Flash Flood Warning	SHV	Cass, Marion	5 hr
Jul 28, 8:03 AM CDT	Tornado Warning	SHV	Cass, Marion	42 min
Jul 28, 8:33 AM CDT	Flash Flood Warning	SHV	Gregg, Harrison, Upshur	3 hr
Jul 28, 10:46 AM CDT	Flash Flood Warning	SHV	Panola	4 hr
Jul 28, 11:22 AM CDT	Flash Flood Warning	SHV	Harrison	3 hr
Jul 28, 12:59 PM CDT	River Flood Warning	SHV	Cass, Marion	5 days
Jul 28, 3:42 AM CDT	Areal Flood Advisory	SHV	Bossier, Caddo	3 hr
Jul 28, 7:07 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo	38 min
Jul 28, 7:52 AM CDT	Flash Flood Warning	SHV	Bossier, Caddo, Webster	4 hr
Jul 28, 8:07 AM CDT	Flash Flood Warning	SHV	Webster	3 hr
Jul 28, 8:24 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Webster	51 min
Jul 28, 9:10 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Webster	50 min
Jul 28, 9:44 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, Claiborne, De Soto, Red River and 1 more	61 min
Jul 28, 10:53 AM CDT	Flash Flood Warning	SHV	Webster	112 min
Jul 28, 11:18 AM CDT	Flash Flood Warning	SHV	Caldwell, Jackson, Natchitoches, Winn	4 hr

Nearby

Flash Flood Warnings in Texas, 2009 Every flash flood warning in 2009

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.