Alert archive / South Dakota / Flash Flood Watches in 2007
Flash Flood Watch 3, NWS Aberdeen, SD
NWS Aberdeen, SD issued this flash flood watch at May 21, 2007, 2:48 PM CDT for 9 counties in South Dakota. It took effect at May 22, 2007, 1:00 AM CDT. It was in force for 27 hr.
The area
The counties it named.
The facts
- Issued
- May 21, 2007, 2:48 PM CDT (19:48 UTC)
- In effect from
- May 22, 2007, 1:00 AM CDT
- Expired
- May 23, 2007, 4:25 AM CDT
- In force
- 27 hr
- Issued by
- NWS Aberdeen, SD
- Flood severity
- None
Counties Brown County, SD, Clark County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Hand County, SD, Marshall County, SD, McPherson County, SD, Spink County, SD
The radar
The Aberdeen radar (KABR), 22 km from the middle of the area, began a volume at 19:50 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
Bismarck Municip, ND (KBIS), launched 12:00Z, 7.8 hours before the alert went out and 241 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
- 124 J/kg
- Mixed-layer CIN
- -413 J/kg
- Mixed-layer LCL
- 1282 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 231 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Aberdeen, SD wrote its last area forecast discussion before this flash flood watch went out at May 21, 11:27 AM CDT, 3 hours 21 minutes earlier.
Area forecast discussion, May 21, 11:27 AM CDT, 3 hours 21 minutes before
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Service Notice</title>
<link rel="stylesheet" href="index.css">
</head>
<body>
<main class="wrap">
<section class="card" role="status" aria-live="polite">
<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.
</p>
<p id="message2">
Please try again in a few minutes.
</p>
<p class="small" id="detail">
If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
</p>
</section>
</main>
<script src="index.js"></script>
</body>
</html>Hazardous weather outlook, May 21, 5:46 AM CDT, 9 hours 2 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE ABERDEEN SD 546 AM CDT MON MAY 21 2007 SDZ003>005-007-009>011-015>017-019-033>037-045-048-051-221100- CORSON-CAMPBELL-MCPHERSON-MARSHALL-WALWORTH-EDMUNDS-DAY-DEWEY- POTTER-FAULK-CLARK-STANLEY-SULLY-HUGHES-HYDE-HAND-JONES-LYMAN- BUFFALO- 546 AM CDT MON MAY 21 2007 /446 AM MDT MON MAY 21 2007/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND NORTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS ARE POSSIBLE ACROSS CENTRAL AND NORTHEAST SOUTH DAKOTA TODAY INTO TONIGHT...AS A LOW PRESSURE SYSTEM SLIDES EAST OUT OF EASTERN WYOMING. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON INTO TONIGHT. BESIDES THE THREAT OF DANGEROUS LIGHTNING...THE MAIN SEVERE THUNDERSTORM THREATS ARE LARGE HAIL AND DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE ACTIVE PATTERN WILL CONTINUE ACROSS THE AREA INTO TUESDAY AND WEDNESDAY...BRINGING ADDITIONAL CHANCES FOR SHOWERS AND THUNDERSTORMS. AT THIS TIME SMALL HAIL...STRONG WINDS...HEAVY RAINFALL AND FREQUENT LIGHTNING ARE THE MAIN THREATS WITH ANY THUNDERSTORM DEVELOPMENT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON INTO TONIGHT. SDZ006-018-221100- BROWN-SPINK- 546 AM CDT MON MAY 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT SHOWERS AND THUNDERSTORMS ARE POSSIBLE ACROSS CENTRAL AND NORTHEAST SOUTH DAKOTA TODAY INTO TONIGHT...AS A LOW PRESSURE SYSTEM SLIDES EAST OUT OF EASTERN WYOMING. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS THIS AFTERNOON INTO TONIGHT. BESIDES THE THREAT OF DANGEROUS LIGHTNING...THE MAIN SEVERE THUNDERSTORM THREATS ARE LARGE HAIL AND DAMAGING WINDS. FLOODING IS EXPECTED TO CONTINUE ON THE JAMES RIVER FOR AN EXTENDED PORTION OF TIME. SEE THE LATEST FLOOD STATEMENT FOR SPECIFIC RIVER STAGE INFORMATION. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE ACTIVE PATTERN WILL CONTINUE ACROSS THE AREA INTO TUESDAY AND WEDNESDAY...BRINGING ADDITIONAL CHANCES FOR SHOWERS AND THUNDERSTORMS. AT THIS TIME SMALL HAIL...STRONG WINDS...HEAVY RAINFALL AND FREQUENT LIGHTNING ARE THE MAIN THREATS WITH ANY THUNDERSTORM DEVELOPMENT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING INTO TONIGHT. MNZ039-046-SDZ008-020>023-221100- TRAVERSE-BIG STONE-ROBERTS-CODINGTON-GRANT-HAMLIN-DEUEL- 546 AM CDT MON MAY 21 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL MINNESOTA AND NORTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT THE CHANCE FOR SHOWERS AND THUNDERSTORMS EXISTS ACROSS NORTHEAST SOUTH DAKOTA AND WEST CENTRAL MINNESOTA TODAY INTO TONIGHT...AS A LOW PRESSURE SYSTEM SLIDES EAST OUT OF EASTERN WYOMING. THERE IS A POSSIBILITY FOR SEVERE WEATHER TONIGHT. BESIDES THE THREAT OF DANGEROUS LIGHTNING...THE MAIN SEVERE THUNDERSTORM THREATS ARE LARGE HAIL AND DAMAGING WINDS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE ACTIVE PATTERN WILL CONTINUE ACROSS THE AREA INTO TUESDAY AND WEDNESDAY...BRINGING ADDITIONAL CHANCES FOR SHOWERS AND THUNDERSTORMS. AT THIS TIME SMALL HAIL...STRONG WINDS...HEAVY RAINFALL AND FREQUENT LIGHTNING ARE THE MAIN THREATS WITH ANY THUNDERSTORM DEVELOPMENT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT. ALBRECHT
Nearby
Flash Flood Watches in South Dakota, 2007Every flash flood watch in 2007
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.