Alert archive / Nebraska / Flash Flood Warnings in 1991

Flash Flood Warning 5, NWS Cheyenne, WY

May 16, 1991Dawes County, Sioux County, Nebraska

NWS Cheyenne, WY issued this flash flood warning at May 16, 1991, 12:57 AM MDT for Dawes County, Sioux County, Nebraska. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: May 16, 1991, 12:57 AM MDT (06:57 UTC)
Expired: May 16, 1991, 3:00 AM MDT
In force: 2 hr
Issued by: NWS Cheyenne, WY
Area: Whole counties

Counties Dawes County, NE, Sioux County, NE

The nearest sounding before it

Rapid City, SD (KRAP), launched 00:00Z, 7.0 hours before the alert went out and 169 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 279 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, May 15, 7:05 PM MDT, 5 hours 52 minutes before

WYZ017-160200-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
705 PM MDT WED MAY 15 1991

...THE TORNADO WATCH FOR EXTREME SOUTHEAST WYOMING HAS BEEN ALLOWED
TO EXPIRE...

THE TORNADO WATCH POSTED EARLIER FOR EXTREME SOUTHEAST WYOMING HAS
BEEN ALLOWED TO EXPIRE.  HOWEVER...AT 700 PM MDT...A FEW THUNDERSTORMS
CONTINUED TO MOVE NORTH AT 15 MILES AN HOUR ALONG THE NEBRASKA BORDER.

THESE STORMS WILL STILL AFFECT EASTERN GOSHEN COUNTY...INCLUDING THE
TOWN OF TORRINGTON.  THESE THUNDERSTORMS WILL PRODUCE STRONG WINDS...
BRIEF HEAVY RAIN...SMALL HAIL..AND DEADLY LIGHTNING.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER FROM THE WEATHER IN A
STRONG BUILDING.  STAY INSIDE UNTIL THE STORM PASSES.

VIRGILLITO

Local storm report, May 15, 9:57 PM MDT, 3 hours 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>

Local storm report, May 15, 10:15 PM MDT, 2 hours 42 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>

Local storm report, May 15, 10:21 PM MDT, 2 hours 36 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>

The office that day

Everything else NWS Cheyenne, WY issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 15, 6:01 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Cheyenne, Kimball	35 min
May 15, 6:01 PM MDT	Severe Thunderstorm Warning	CYS	Scotts Bluff	35 min
May 15, 6:36 PM MDT	Severe Thunderstorm Warning	CYS	Banner, Cheyenne, Morrill, Scotts Bluff	39 min
May 15, 7:47 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	43 min
May 15, 7:47 PM MDT	Severe Thunderstorm Warning	CYS	Sioux	43 min
May 15, 8:37 PM MDT	Severe Thunderstorm Warning	CYS	Box Butte, Morrill	50 min
May 15, 8:37 PM MDT	Severe Thunderstorm Warning	CYS	Garden	50 min
May 15, 8:38 PM MDT	Flash Flood Warning	CYS	Dawes, Sioux	5 hr
May 16, 2:43 PM MDT	Flash Flood Warning	CYS	Dawes, Sioux	3 hr

Nearby

Flash Flood Warnings in Nebraska, 1991 Every flash flood warning in 1991

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.