Alert archive / Missouri / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 96, NWS Kansas City, MO
NWS Kansas City, MO issued this severe thunderstorm warning at Jun 21, 1997, 1:54 AM CDT for Atchison County, Missouri. It was in force for 51 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jun 21, 1997, 1:54 AM CDT (06:54 UTC)
- Expired
- Jun 21, 1997, 2:45 AM CDT
- In force
- 51 min
- Issued by
- NWS Kansas City, MO
- Area
- Whole counties
County Atchison County, MO
The radar
The Omaha radar (KOAX), 127 km from the middle of the area, began a volume at 06:58 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 21, 2:00 AM CDT | Thunderstorm Wind | Tarkio, MO | Severe thunderstorm winds knocked down large trees, 6 inches or more in diameter , into utility lines in Tarkio. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 21, 1:30 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 6.9 hours before the alert went out and 127 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
- 5994 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1151 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 4.8
- Supercell composite
- 25.7
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMCI 210653 RRA
SVRMCI
MOC005-210745-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
154 AM CDT SAT JUN 21 1997
* SEVERE THUNDERSTORM WARNING FOR
ATCHISON COUNTY - NORTHWEST MISSOURI
* UNTIL 245 AM CDT
* SOME LOCATIONS AFFECTED
TARKIO BY 215 AM
WESTBORO BY 230 AM
* AT 150 AM WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE
THUNDERSTORM NEAR ROCKPORT MOVING EAST-SOUTHEAST| AT 35 MPH.
PEOPLE IN THE PATH OF THIS STORM CAN EXPECT WIND GUSTS TO 60 MPH OR
HIGHER.
SEVERE THUNDERSTORMS PRODUCE LARGE HAIL AND DAMAGING WINDS. FOR
YOUR SAFETY...MOVE INDOORS AND STAY AWAY FROM WINDOWS.
JULYWhat forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Kansas City, MO wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 3:05 PM CDT, 10 hours 49 minutes earlier.
Area forecast discussion, Jun 20, 3:05 PM CDT, 10 hours 49 minutes before
NORTHWEST MISSOURI FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO
305 PM CDT FRI JUN 20 1997
...POTENTIAL FOR SEVERE THUNDERTSTORMS XTRM NORTHEAST KS AND NW MO
TONIGHT...
...FLASH FLOOD POTENTIAL ACRS NRN THIRD OF XTRM NERN KS...NRN
QUARTE OF MO...AND SMALL PART OF W CNTRL IL /SEE BELOW/...
BOUNDARY HAS ESSENTIAL BEEN SHUNTED SWD OF STNRY FNT IN SERN NE AND
CNTRL IA INTO NRN MO THIS AFTN. ETA INITIALLY SHEARS VORT MAX OVR
IA TOO FAR EAST TO FAST...BUT DOES WELL WITH S/WV MOVING OUT OF
WY/NERN CO/SWRN NE THIS EVEING AND OVERNIGHT...BUT MAY BE SLIGHTLY
TOO FAR TO THE NORTH AND EAST. A WK WAVE MOVING NEWD FM N CNTRL OK
MAY PLAY A FACTOR IN MAXIMIZING LOW LVL MSTR CONV AND JET INTO
CWA...BUT MAIN THREAT WILL BE THE S/WV IN WRN NE BY 00Z. IMPRESSIVE
BOUNDARY LAYER TO 850 THETA-E RIDGE AND MODERAGE CONVERGENCE NOTED
FROM 00Z THROUGH 12Z ON SAT. SFC TO 700 MB FLOW MAY SUFFICIENT TO
CAUSE TRAINING OF TSRA OVER NERN KS/NWRN MO THEN TO N CNTRL MO
TONIGHT...PRODUCING THE POTENTIAL FOR EXCESSIVE RAINS IN THE 2-4
INCH RANGE.
WITH THE BOUNDARY EXPECTED TO MOVE LITTLE ACRS THE CWA THROUGH 48
HRS...COMPELLED TO INCLUDE CHC POPS IN EVERY PERIOD THROUGH SUN
NIGHT...ESPECIALLY WITH ANTICIPATED CAPES REMAINING IN THE 2-3K
RANGE DURING THE AFTN AND EVENING HOURS. THIS MAY BE TO THE CHAGRIN
FOR THOSE PLANNING OUTDOOR EVENTS THIS WEEKEND. ONLY NOTICEABLE
CONCERN TO THE POP FORECAST WILL BE DEGREE OF DEEPENING OF WAVE
MOVING ONTO PAC CST. THIS MAY PRODUCE SLIGHTLY STRONGER RIDGING
DOWNSTREAM AND RE-BUILD A THERMAL CAP OVER PART OF THE CWA ON SUN.
FOR NOW WILL JUST LEAVE CHANCE POPS IN THROUGH SUN NITE.
COORD WITH STL AND TOP ON HVY RAIN THREAT TONIGHT. PER STL
REQUEST...WILL ISSUE A FLASH FLOOD WATCH TONIGHT...INCLUDING PART
OF STL CWAS COUNTIES. WILL ISSUE BTWN 330 PM AND 400 PM.
.EAX...FLASH FLOOD WATCH TONIGHT FOR XTRM NERN KS...NRN 1/4 OF
MO...AND A SMALL PART OF W CNTRL IL.
KSZ025-102-MOZ001-027-ILZ015-016-211300Z
SMITHIn the hours before
Special weather statement, Jun 21, 12:47 AM CDT, 1 hour 7 minutes before
KSZ025-102-MOZ001>008-011>017-020>025-211345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO 1248 AM CDT SAT JUN 21 1997 ...FLASH FLOOD WATCH IS IN EFFECT FOR NORTHERN MISSOURI AND EXTREME NORTHEAST KANSAS FOR TONIGHT... A LARGE CLUSTER OF STRONG TO SEVERE THUNDERSTORMS OVER SOUTHEAST NEBRASKA AND SOUTHWEST IOWA WILL MOVE SOUTHEAST AND INTO NORTHWEST MISSOURI OVERNIGHT...EVENTUALLY SPREADING ACROSS THE REST OF NORTHERN MISSOURI DURING THE PRE-DAWN HOURS. VERY MOIST AND UNSTABLE AIR REMAINS ACROSS NORTHERN MISSOURI AND THE THUNDERSTORMS APPROACHING FROM NEBRASKA AND IOWA WILL TAP INTO THIS MOISTURE. BESIDES THE POTENTIAL FOR SEVERE THUNDERSTORMS...THESE STORMS WILL LIKELY PRODUCE VERY HEAVY RAINFALL IN A SHORT PERIOD OF TIME WHICH COULD PRODUCE FLASH FLOODING. BETWEEN TWO AND FOUR INCHES OF RAIN IS POSSIBLE ACROSS THE WATCH AREA WITH THE HEAVIEST RAINS MOST LIKELY TO BE NEAR THE IOWA AND MISSOURI STATE LINE. PERSONS LIVING NEAR FLOOD PRONE AREAS SHOULD BE ON THE LOOK-OUT FOR RAPIDLY RISING WATER AND BE PREPARED TO MOVE TO HIGHER GROUND. MOTORISTS ARE URGED NOT TO CROSS ROADWAYS WHICH ARE COVERED WITH WATER. JULY
Special weather statement, Jun 21, 12:48 AM CDT, 1 hour 6 minutes before
KSZ025-102-MOZ001>008-011>017-020>025-211345- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PLEASANT HILL/KANSAS CITY MO 1248 AM CDT SAT JUN 21 1997 ...FLASH FLOOD WATCH IS IN EFFECT FOR NORTHERN MISSOURI AND EXTREME NORTHEAST KANSAS FOR TONIGHT... A LARGE CLUSTER OF STRONG TO SEVERE THUNDERSTORMS OVER SOUTHEAST NEBRASKA AND SOUTHWEST IOWA WILL MOVE SOUTHEAST AND INTO NORTHWEST MISSOURI OVERNIGHT...EVENTUALLY SPREADING ACROSS THE REST OF NORTHERN MISSOURI DURING THE PRE-DAWN HOURS. VERY MOIST AND UNSTABLE AIR REMAINS ACROSS NORTHERN MISSOURI AND THE THUNDERSTORMS APPROACHING FROM NEBRASKA AND IOWA WILL TAP INTO THIS MOISTURE. BESIDES THE POTENTIAL FOR SEVERE THUNDERSTORMS...THESE STORMS WILL LIKELY PRODUCE VERY HEAVY RAINFALL IN A SHORT PERIOD OF TIME WHICH COULD PRODUCE FLASH FLOODING. BETWEEN TWO AND FOUR INCHES OF RAIN IS POSSIBLE ACROSS THE WATCH AREA WITH THE HEAVIEST RAINS MOST LIKELY TO BE NEAR THE IOWA AND MISSOURI STATE LINE. PERSONS LIVING NEAR FLOOD PRONE AREAS SHOULD BE ON THE LOOK-OUT FOR RAPIDLY RISING WATER AND BE PREPARED TO MOVE TO HIGHER GROUND. MOTORISTS ARE URGED NOT TO CROSS ROADWAYS WHICH ARE COVERED WITH WATER. JULY
Nearby
Severe Thunderstorm Warnings in Missouri, 1997Every severe thunderstorm warning in 1997
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.