Alert archive / North Carolina / Flash Flood Warnings in 2010

Flash Flood Warning 11, NWS Raleigh, NC

May 15, 2010Montgomery County, Randolph County, North Carolina

NWS Raleigh, NC issued this flash flood warning at May 15, 2010, 11:12 PM EDT for Montgomery County, Randolph County, North Carolina. It was in force for 102 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 15, 2010, 11:12 PM EDT (03:12 UTC)
Expired
May 16, 2010, 12:54 AM EDT
In force
102 min
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Flood severity
None

Counties Montgomery County, NC, Randolph County, NC

The radar

The Raleigh/Durham radar (KRAX), 124 km from the middle of the area, began a volume at 03:13 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

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 3.2 hours before the alert went out and 62 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 00:00Z on 2010-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 471 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 00:00Z on 2010-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
471 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1996 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
41 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 flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Raleigh, NC wrote its last area forecast discussion before this flash flood warning went out at May 15, 10:35 PM EDT, 37 minutes earlier.

Area forecast discussion, May 15, 10:35 PM EDT, 37 minutes before
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In the hours before

Local storm report, May 15, 8:37 PM EDT, 2 hours 35 minutes before
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Special weather statement, May 15, 9:55 PM EDT, 1 hour 17 minutes before
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Special weather statement, May 15, 10:05 PM EDT, 1 hour 7 minutes before
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Special weather statement, May 15, 10:12 PM EDT, 1 hour before
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      <h1 id="headline">This service is currently unavailable.</h1>
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        Please try again in a few minutes.
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Local storm report, May 15, 11:12 PM EDT, 0 minutes before
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      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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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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The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 15, 9:55 PM EDTSpecial Weather StatementRAHDavidson50 min
May 15, 9:57 PM EDTSevere Thunderstorm WarningRAHDavidson, Forsyth48 min
May 15, 10:05 PM EDTSpecial Weather StatementRAHRandolph40 min
May 15, 10:12 PM EDTSpecial Weather StatementRAHGuilford48 min
May 15, 10:21 PM EDTSevere Thunderstorm WarningRAHGuilford39 min
May 15, 10:22 PM EDTSevere Thunderstorm WarningRAHMontgomery, Randolph38 min
May 15, 10:34 PM EDTAreal Flood AdvisoryRAHGuilford2 hr
May 15, 10:41 PM EDTFlash Flood WarningRAHGuilford3 hr
May 15, 11:00 PM EDTSevere Thunderstorm WarningRAHGuilford45 min
May 15, 11:06 PM EDTSevere Thunderstorm WarningRAHChatham, Harnett, Lee29 min
May 15, 11:34 PM EDTSevere Thunderstorm WarningRAHAlamance41 min
May 15, 11:58 PM EDTSpecial Weather StatementRAHDurham62 min
May 16, 12:12 AM EDTSpecial Weather StatementRAHVance63 min
May 16, 12:25 AM EDTSpecial Weather StatementRAHDurham, Orange35 min
May 16, 12:32 AM EDTSpecial Weather StatementRAHWake58 min
May 16, 1:02 AM EDTSpecial Weather StatementRAHDurham43 min
May 16, 1:46 AM EDTSpecial Weather StatementRAHEdgecombe, Halifax, Nash74 min
May 16, 1:50 AM EDTSpecial Weather StatementRAHEdgecombe, Halifax, Nash70 min
May 16, 2:01 PM EDTSpecial Weather StatementRAHHoke29 min
May 16, 3:17 PM EDTAreal Flood AdvisoryRAHCumberland99 min
May 16, 3:30 PM EDTSpecial Weather StatementRAHSampson30 min
May 16, 3:38 PM EDTSpecial Weather StatementRAHCumberland37 min
May 16, 4:00 PM EDTSpecial Weather StatementRAHLee45 min
May 16, 4:05 PM EDTSevere Thunderstorm WarningRAHChatham, Lee, Wake40 min
May 16, 4:40 PM EDTSpecial Weather StatementRAHWake65 min
May 16, 5:07 PM EDTSpecial Weather StatementRAHDurham, Orange38 min
May 16, 5:21 PM EDTSevere Thunderstorm WarningRAHMontgomery39 min
May 16, 5:35 PM EDTSpecial Weather StatementRAHJohnston40 min
May 16, 6:10 PM EDTSpecial Weather StatementRAHMoore65 min
May 16, 6:16 PM EDTSpecial Weather StatementRAHWayne, Wilson59 min
May 16, 7:13 PM EDTSpecial Weather StatementRAHMoore62 min
May 16, 7:24 PM EDTSevere Thunderstorm WarningRAHCumberland, Harnett, Hoke, Lee, Moore51 min

Nearby

Flash Flood Warnings in North Carolina, 2010Every flash flood warning in 2010

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.